US1871762A - Supervisory control system - Google Patents

Description

16, 1932- T. u. WHITE SUPERVISORY CONTROL SYSTEM Filed June 7, 192,6 4 Sheets-Sheet -1 INVENTUR Thomas 0. Whiz? WITNESSES:

Af'mmm Aug. 16, 1932. T wH|TE 1,871,762

SUPERVISORY CONTROL SYSTEM Filed June 7, 1926 4 Sheets-Sheet -2 WITNESSES: INVENTOR 4/ Mv Thoma u. Wh/fe Aug-16, 1932. T. U. WHIT'E 1,871,16

SUPERVISORY CONTROL SYSTEM Filed June '7, 1926 4 Sheets-Sheet 5 WITNESSES:

INVENTOR Thomas U. -l/1/h/'f ATTORNEY SUPERVIS ORY CONTROL SYSTEM F'iied-June 7, 192 6 4 Sheets-Sheet 4 $51.51 a T T LT WITNESSES:

I I INVENTOR- j 1. 7770/7 as'U.W/7/f ATTORNEY Patented Aug. 16, 1932 i err-111G;

e ue newsman: GEIQAQOI.LIJIAZQI$; wsssmeesv eeeseme s v GQM1?4%.N..Y,,.:AUCOREQMTIQE errs-imsereverie SUPERVISOEYV oon rltonv My nten ion l-ates,- t sign llin systems memes: Pa t u arly; t t at .c sssrkn ue a perv sory c ntr 1-;;I

wee di tr butor mea s orot lysel ti g an apparatusunit foroperation,

de mea s, e eby a n t' perab e ,a plurality ofpositions, remotely; selected by a 7 de mb n t on. o mp lses; pl cedlund r irs t ontrol fr m the e e i g statlon r operation; toany one, or alloflts posrtmns.

no her je 0i my in enti n is to P1101.

" dem ens inc ud ng a in ously rotating i t butor for: motely lecting an zippers-i nergtmalging a Code;selectionnatzthe ofliceof, aid. r InQte selection, then operatingt eunit selected to any one of a plurality ofpositions: and fi ly p ov cli g supervisory indication y cod c mb nation of-inlpuiszes of saicloperation 7 Another object of myinvention istoproid yn h onou r ta g distributors for operating a c e selecting anclcode o erating supervisory control system. Another. Object of my invention is to proi l m nsin. a synchronous distributor, code. spon v ,super isory Control system for re-r.

mote-metering.

There are other ob ectsof my ,inventiorn which; together, with I foregoing, will appear;

i th pecification; which f llows 7 Among the venous schemes heretofore pro poseclfor remote selectlonln a superyisory control system is .th.e.co(:letype.v This rnether ocl. of selection lends itself particularly W611 to supervisory control by reason .oftheiaot thateaoh selection depends upon a combination-of impulses, of various characteristics.

The, signalling line employed. in supervismy control-must, necessarily be placed along Power rc aud S,-:t r ore,.-sub.jeeted,to

V hdueilit su g s ymakinga selecti n-fie:

P nclent 9n weds combination f. mpulses An object of my invention is to pro vig1 e I h .efifie t:e th esiir es wh ch meme m n m zed mhie t eh l h el eseee'heh st hlr e i -ee-it etwmhf s til h t se -F1 requiregi in supervisory control and it is nec: v

'essary in addat n tothe protection obtained re d s et ftd were t e ice t ec i n nefle. at h remet s y is af er which .h e e etsh e hteins di t whe l f the selectedunit. ;clirect control enables repeated opening anti closing of the circuit.

breaker ith ht hr hs e -sho 0 1 se r gr e t eir vee s m, tel graph a terns haveernploy ed synchronously rota-ting istribu f r tran mitting cbmb et o 's Q mpulses fqere s e e h n-t h arra met-thee ,hseefeune tqh e p as Well as mpl nd- -r abl e v yser susd ew-h shl wev' e he e.

tele graph systenis as far as supervisory controlsystems are concerned isthe indirect Q Ql, ert afsstl ck i hyie t l o the final operation of the relnotely-se-lectecl unit.

cn te lzah ue n is p rv sqry ntro 5Y3."

w ns? it Rimmmtive at. aft r. mpl t e sel ction th spa her e, ot-o y fqrmed of e el ctio u lso, obta fulls eldir ct ro o t e ele h d unl e My invention; therefore, comprises in gen eral; synchronously rotating distributors at;

office i n. e hi h a codes le n i mad ol owe byv sup rrisery nt cat on 0f the selec ion ade 3 Direct an full controlof the rernote unit isthen obtained 7 from the 'ofiicej end. For still further pro;

tection the selectingapparatus is normally nlalnta necl dlsconnectecl 'fromthelinecon v necting the stations.

Referring to the drawings; 1;

circuit-arrangements, at the. office, and.

Frgures ,3 and i dls'closethe apparatus and circuit, arrangements 7 at. the sub-station.

r iguresl and, 2 discloselthe apparatus and In practicing; my invention, I provide .an'

Qfiice, Figuresfil' and2fconnectedto a substat1on,1F 1gures43 and, 4 connected byalcon trol line 183 and supervisory line 269, a synechromzing1ine268ancla common-return line 267 with synchronously rotating control dis tributors 155 and 346, supervisory distributors 229 and 478 and synchronizing distributors 247 and 492. Relays 17 9, 211, 313 and 418 are under the control of distributors 155, 247, 346 and 478, respectively for switching the control and supervisory lines 183 and 269 from the selecting to final operating circuitafter the completion of the selection.

Referring more particularly to; Figure 1, the individual control keys 103 and 112 control circuit breakers at the remote point. The,

lamps 101, 102, 109, and 111 are individual supervisory indicators for thecorre'sponding circuit breakers. An operate key 118 controls the operation of the selection unit and release key 124 is provided to restore-the set up selection. Relays 1311and-132 are'codingdevices individual to the keys 103 and 112 for controlling the code to be transmitted.

" Relay 129, when energized,opens the origi- Lil) 5 selecting circuit.

nal energizing circuit for code relays such as 131 and 132. Relays 133, 134,135, 141, 142 and 146 are the supervisory? relays. Relay 172 and relays 169 and 171 are the first and final selecting supervisory relays respective ly and relay 168 functions to render other selection ineffective after the final selection.

Relay 152, 153 is the receiving relay for the final selection and determines whether the relays 169 or 171 will be energized. Relay 169 switches the control line from the code transmitting to operating position. The distributor controls the transmission of the code.

Referring to Figure 2, distrib ,utor 229 receives supervisory signals from the remote station to distribute the impulses to the supervisory code-selector relays 201 and 207. Re-

lay 203 energizesto open the operatingcircuit of the windings 201 and 202 and relay 205, When energized, opens the energizing circuit of the windings 206 and'-207.- The relay 204 is the group selecting relay. Relay 208, 209 is the start relay functioning toprepare the Relay 211 functions to switch the supervisory line from theselecting to the-operating. circuit and windings 212 and 213 comprise the line relay. The

a distributor 247 operates to maintain synchronism between the office and sub-station distributor and is under the control of" relays 214 to 219. I 7

Referring to Figure 3, the distributor 346 is the control receiver for distributing the code signals to the selector relays 307, 308

and 316, 318, 321, 323 and 325. Relay windings 309, 311, 301 and 302 are the start relays, which function to close the selecting circuits over the contacts ofrelay 312. The relays 305 and 306 render other selection inoperativeafter final selection. Relay 314' isthe line-relay and relay 313 switches the control line from the'selection to the operating circuit. H w

. Referring to Figure 4, relays 402 and 403 ulses rela s are ener ized for makin first are final selecting apparatus, the circuits of which are under the 'controlof relay 401.

Circuit breakers 431 and 435 are individual to keys 103 and 112, respectively. Relays 404 to 408 and relays 413 to 417 are individual to'the' circuit breakers 431 and 435, respectively for operating a circuit breaker responsive to a control operation and for initiating z the transmission of supervisory impulses in.-

' dicati've; of the operation V d of. the circuit breaker individual thereto.

The distributor 478 is a supervisory code sender, for code impulses prepared by the energization of relays411 and 412. Relay 418 switches the supervisory line from its selecting to itsoperating circuit. The distributor 492 functions in conjunction with distributor 247 for maintaining the distributors at the sub-station and the oliice in synchronism and is under the control of relays 422 to 427. The function of the remaining relays willbe obvious from the detailed description of the organization which follows: For purposesof convenience all of the polar relays in the drawings have been disclosed, showing two windings in order to illustrate that current of one-polarity will operate the armatures in one direction and current of opposite polarity-will operate the armatures in the opposite direction. Although a single battery is disclosed at the o1li'ce,and a single battery at the substation with circuits for all of'the relays energized from these batteries in certain instances, relays have been shown as connected, to batter es which appear to. be other than the main station battery. It will be understood, of course, that actually the same battery is employed and that the connections shown are merely for purposes of conveniductor 183 and operate the line relay 314 at the sub-station. The'impulses are then relayed through the distributor 346 at the sub- ICS pulses are transmitted over the control constation. "Responsive to' these control code ima group and then a finalselection.

- Following the group and final selection,

impulses are transmitted over the distributor 478 and supervisory line 269 to operate the supervisory receiver relay 212' at the oili'ce.

The impulses are relayed through the supervisory receiver dist-r buton229 to make a groupand final selection which as aresult.

' each being locally driven.

illuminates a supervisory lamp giving the dispatcheran identification of the selection -which has been completed at the'remote station. I

The dispatcher willnow operate the key 7 118 to close either its upper or lower contacts depending upon the desired operation. Re-

lease key 124 functions to release fthe selecthe distributor brushes at the ofiice are mounted for rotation on a single motor-driven shaft. "Similarly thedistributor brushes at single motor-driven shaft. a v

Normally the distributor-brushes at the oflice and the substation rotate in synchrenism Synchronism is maintained by means of thet-wo distributor brushes 493 and 264. As the dirstributor brush 264 is passing over the first segment 5 shown on the rig t hand half of the bank, an

impulseis sent from the positive side of the battery 266 through the'segment over which the brush 264 is at that moment passing and through brush wiper 264, the windings 218 and 219 synchronizing conductor 268,

through the winding 422 and 423 'of the polar relay through the brush 493 and the segment of the distributor and over common return conductor 267 to the midpoint of the battery As a result of the-energization of the relay 219 over the circuit 311st traced, the armature 246 operates to closeits right hand contact and a circuit is completed from the positive side of the battery 266 through the armature 246 and its right hand contact, the windings 217 and 216 to the midpoint ofbattery 266. The relay windings 216 and 217 when energized move their armature 245th withdraw the latcii 27 0 integral therewith from the-path of the distributor brush 264. Normally with "the relay deenergized this projection is in the path of the brush and therefore acts to bring the brush to a stop.

' Simultaneously at the remote station the 'energization of the relay422 over the circuit just traced completes a circuit from the positive side of the battery 477 through the left hand contact of the armature 474 and through the windings of relays 427 and 426 to the mid point of battery 477. -The relay 426 and 427 operates to move its armature 476 and thereby withdraws the latch from the distributor arm 493. In this manner the brush arms 264 and 493 pass upon their first segment of the right half of their respective banks in synchronism.

The distributor ar m'493 is arranged to ro- .t'ate sli htly faster than the arm264 and will therefore reach the first segment on the right 493, failureof an impulse over the line268" given. a

-segment 29O the circuit just traced over the synchronizing line from thepositiv-e side of battery 266 is opened. The brush 264 will now pass ove'r the segment 291 and a circuit similar to the one just traced over the synchronizing line is completed from the negative side of battery '266 and'through";the distributor' 247 at. the silica and 492 at the substation including the line relays 218, 219, 422

"and 423. 3 the substation are mounted forgrotation on a The relaywinding 218' is energized over this circuit and operates the armature 246 to its left'hand contact. As result of this operation of armature 246, an obvious energizing circuit is completed for the relay wind relays 218 and 219 the relay winding 423,- at the substation end is energized over the circuit-including the relay winding 218. The

armature 474 is operated to close its-right hand contact. which in turn completes an obvious energizing circuit for the relay wind ings 424 and 425. 'As a result of theenergization' ofthis relay, the armature 475 is operated to remove the latch from the dis-,

' tributor brush 493 which at this-time is on segment 497. 'In this manner by the two reversals ofpolarity during each rotation of the distributor arms; two synchronizing impulses per revolution are transmitted to mainw tain the rotating brushes in synchronisinb Although the distributor brush 264 is the synchronizer and the brush 493the synchronizedgby'arranging to latch and un'latclrthe distributor 264 as well as distributor bluish for any reason whatsoever will'prevent fu therrotation of the brush 264 as well as 493.

Inactual operation the speed of'the two brushes can be so arranged by means of the well developed modern synchronous motor as to make them so nearly alike that the latches 245 and 47 6 fun'ot1on in such a mannerthatv neither brush is ever actually latched and brought to rest but continues'on the contrarv. to rotate substantially continuously. i It is understood of course, that other arrangements for synchronism can be used.

' In order to better understand theinvention, the following detaileddescriptionthereof is; i

As in the brief description above, it will be assumed that the dispatcher desires to close the circL1it-breal:ei- 431.' in order to accomplish this, hewill close the individual key 103.

This-key is. maintained in operative posi ion .until released. As a result of this operation,

a circuit is completed from the negative side of the battery 266, conductor-185, the winding of relay 131, upper contact and lever 105, the back contact, and armature 104 and conductor 186 to the mid point of battery 266.

Relay .131 is energized over this circuit and completes a locking circuit for itself from the negative side of battery 266, conductor 185, winding of relay 131, its first closed contact, closed contact of key 124, conductor 186 to the midpoint of battery 266.

A further result of the energization ofv relay 131 is to prepare an energizing circuit c for the relay 152 at the second contact and for the relay 148 from the negative side of battery 266, conductor 185, the winding of relay 148, the third contact of relay 131 to positive side of battery 266 over conductor 186..

The relay 148 energizes to impress a negative polarity from the battery 266 upon the control conductor 183 over armature 149 and its front contact when the wiper 156 reaches the contact 157 A further result of the energization of relay 148 is to open the releasing circuit at armature 151. a

From the. operations thus far described, it is evident that the code relay locks itself up over its first contact, closes the energizing circuit for relay 129 at its second contact,

which, in turn, opens the energizing circuits of other code relays and completes an energizing circuit for relay 148 at its third con-' tact, which prepares to impress a negative impulse or start impulse on the control line 'fromarmature 149 and opens a releasing circuit at armature 151. a

The fourth and fifth contact of the code relay functions in a manner hereinafter to be described for transmitting the control code.

A's already noted, when the distributor brush 156 reaches the contact 157, the energization of the relay 148 impresses a negative impulse on the control conductor 183 from the negative side of the battery266 over conductor 185, the front contact and armature 149, contact 157, and wiper 156 of the distributor 155, back contact and armature 181,

conductor 183, armature 359 and its back contact, windings 314 and 315, conductor 37 5, and common return conductor 267 to the positive side of battery 266. V

The distributor brush 356 being in synchronism with brush 156, the power will be on contact 347 at this time and a circuit will be completed from the negative side of battery .477 over conductor 366, the right-hand contact and armature 339, the brush wiper 356 and contact 347 of the distributor 346, windings of start relays 304 and 303, conductor 381, and conductor 375 to'the midpoint of battery 477. The start relay 303 is energized over this circuit to close the left-hand contact of armature 328 and a circuit is completedfor the relay 312 from the negative side of battery 477, conductor 366, Winding of relay 312,.the left-hand contact and armature 328, conductor 381, and conductor 375, to the midpoint of battery 477. I g

The relay 312 energizes over this circuit and completesa locking circuit for itself from negative battery over the circuit just traced through the winding of relay 312, its

first contact, back contact and armature 331,

conductors 381 and 375 to the midpoint of battery 477 and prepares selecting circuits at its secondto seventh contacts. 'By normally maintaining these selecting circuits open, line disturbances from any cause whatsoever have no effect on the selection when no code is being transmitted.

The distributor brush 156 at the office will now reach its contact 158 while at the same time the d stributor brush 356 is passing over its contact 348 at the substation and a circuit is completed from the positive side of the battery 266 over conductor 184, the fourth contact of relay 131, contact 158 and brush wiper 156 of the distributor 155, back contact-and armature 181, conductor 183, armature 359 and its back contact, winding of relays 314, 315 ,conductor 375 and over common-return conductor 267 to the midpoint of battery 266. This is the first code impulse.

The line relay 314 is energized and operates its armature 339 to close its left-hand contact; As a result, a circuit is completed from the positive side of battery 477 over conductor V374, the left-hand contact and armature 339, the distributor brush 356, and contact 348 of the distributor 346, the second contact of the relay 312 and winding of relays 301 and 302, conductors 381 and 375 to the midpoint of battery 477.

The relay 301 is energized over this circuit to operate the armature 327, closing its left- T hand contact and a circuit is completed from the negative side of battery 477 over conductor 366 through winding of group selecting relay 307, back contact and armature 332, left-hand contact and armature 327 and conductors 381 and, 375 to the mid-point of battery 477. Relay 307, upon energization, completes a locking circuit for itself from negative side of battery,- over conductor 366 through thewinding of. the relay 307, through its first contact, back contact and armature 329 and over conductors 381 and 375 to the m dpoint of battery.

The relay 307 is the first orgroup selecting re1ay.- The transmission of a negative impulse over the control conductor 183- instead of the impulse justtracedwould have perated the line relaywindings 314, 315 ;so as to transmit an impulse of opposite polarity to the relay Windings-301and 302xandthe group selecting relay 308 instead =01 the-seleeting re -$1 307. would have become energized. By this arran ement, it is evident therefore that the :firstcontact of the distributor can be used tomake-two group selections by the different polarities." One result of th'ecnergization of relay 307 is to C0111- plete an energizing circuit for the relay 306 {from the negative side of battery 4J7- over conductorfifie through the Windingot relay 306il18 second contact of relay 807 over conductors 881 and 375 to the midpoint of battery 4:77. The energization of relay 806 opens all the group selecting circuits .at its The distributor brush 356 at the substation now passes on to its contact "3 19 in synchronisni with the distributor hrush-=156 which is on thecontact 159 at-the ofiice and a circuit is again conipletedirom the positire side of battery .266, conductor-184:, the

fifth contact of the relay 181, contact 159,-

back contact and armature 181, conductor 183, arn1ature 359 and its back contact, Windings of relay 31 1, 315, through .the common return conductor 267 over conductor-375. This is the second code impulse.

Relay 31-; is again energized to close its left-hand; contact and a circuit is again completed from the positive side ofthe fbattery 77 over conductor 37%, the left-hand contactand armature 339, the distributor brush'856 and the contact 349 of the distributor 346, the third contact of relay 312'and the Windings'of relays 317 and 316-overconductor 367 and the first armature contact 4139 of relay 401 to the midpoint of battery 477.

Relay 316 is energized and the armatu-re 34:1 closes its left-hand'contact. Ascircuit is thereupon complete-d from the negative side of the battery 477. conductor 366, winding of the relay .02, conductorr362, the third -zcontact of the. relay 307', the lettshand contact and armature 341 to then-midpoint rot battery- 177, over conductor 375.. .The relay 402 .makes the final selection and completes a locking circuit foritself'from the negative side of battery 477'onerconductor 366, as traced, through the ..indin;. o'frrelay 402 and its first Contact. over conduotor 36 hackcontact and. armature 329 to th e midpointof the battery 47.7 over conductors 381and 375.

1i turthcrresult of the energization ofrelay 402 is to complete an-energizinqcircuit for-the relay 4:01 fromtheneg ati-ve side of .the hattery l77, Winding of relay 401, second contact of the relay 02 =to theinidpoint of. the

"battery 47 7 a circuit'forfrelay tl9 extending filGnl the negative sideoi: battery 477-, Wind- 1 of aarinature "182. ever is not'eiiective atthistime by reason o f "the fact tha t it-is completed over theclosed 1 contacts 50f theisuperv'isory selectors none of ingof relay 419, sixth contact of .relay 402 and back to the midpoint of battery 477, and

to prepare a locking=circuitiorzrelay 313 at its fourth contact.

The relay- 101 i- -renergized and opensthe In viewotthe 'fact that-2111203? the-selections 1'6 i'at the 'ofiice in synchronisnr W-ith the Wiper 356, which passes over thecontact's 351 to 354 i at the substation.

The distrih utor' brushes at the two stations,

now rotatingin synohronisni reach their con- -tact closers1'66'and 3'58, respect1ve1y,'s1mul- .teneously. As a result ofcthe closing'ofcontact .166 vatthe office, (a'cir'cu-it is completed.

from the negative side oft the loatteryu266, conductor 185, through the Winding of relay 179 over the closed contacts :of lever 1'66 and over conductor 186 to the midpointzof battery 266. The relay 17 9ii-s'enengized :and

switches the line 1183 -from its :selectingrto its operating circuit. "Similarly,- at the substation, the relay 313 is; energized from the negative side of battery 177 "over conduct-or 366' through tl1e-'"Winding f relay 3:18, I the closed contact of the' l-ever 358'to themidpoint aof battery .477 over conductor 375. -1Relay 313 isloclr'edoverr itsfront contactsand armature388, conductor 365.,wfourth contact Pot relay 402, armature 496 :and its .aback contact tethe :m'idpoint of 'battery 4:77. 2 The ZOO-I1- ttrol conductor "183"is-1thus switched fronr'the receiving selector tothe operating circuit.

The energi zati'on of relay 1179 prepares a locking circuit for itself at the front contact The lockingcircuit how- Which have operated at this time andthegrelay becornes deen'ergi'zed as soon :as' the Wiper 156 passes'to the c"ontact"165. The'energizinc; of relay v17 9 atthiswti nier therefore has no effect and the armature 1 81 again closes the "selecting; jeircuitroveritshack contact. I

It "will aloe recalled that upon "the operation of'the final selecting relay i02 tat the substa- "tion, an-en'ergizing circuit Was completed'for the :relay 419. "When the 'dl'StI1b1ltOI"W1peI 479reaches'the contact 481,".the distributor wiper 239 at :the 'olii e rotating in-syn- I chronism therewith Wil lwreach its contact 231.

A circuit willnow be completefrom'th'e negati've side .o-f'ioattery 17 7 over the frontcontact and armature 467 the contact "481 and wiper 17.9,backcontact and armature 472,

conductor 269,.armature.-227end its hack contact and the Windingof-relays -212 :and 213 and 1 over the common return 'zconduoton 267 tothe midpoint of .battery7.

first contact of the relay The relay winding 212 will operate its {armature 243 to close'itsleft hand contact and an energizing circuit will thereupon be completed for the relay winding 201 and 202 from the negati e side of ba-ttery 266, the left hand contact and armature 243, the distributor brush 239 and start contact 231 of the distributor 229, the relay windings 201 and 202 to the midpoint of the battery 266'.

The relay winding 201 is energized over this circuit and closes an energizing circuit for the relay 204 from'the negative side of battery 266, conductor 185, winding relay 204, the left hand front contact of armature 221 to the mid point of battery 266 over conductor 186. i r

The relay'204 is energized over this-circuit and completes locking circuit for itself from negative battery 266,0verconductor 185, the winding of relay204, the firstcontact of relay 204, the hack contact and armature 222 to the midpoint-of battery266 over conduo to r186. Over the remaining contacts circuits areprepared for the Supervisory and identification selection.

The distributor wipers 239 and 47 9 operating in synchronism will now close their contacts 232 and 482 simultaneously with theresult that a circuit will be completed from the positive side of the battery 47 7 through the 307 over conductor 377, contact 432 and distributor brush 479, the back contact a-no armature 472, conductor 269,. the armature 227 and itsbackcontact, windings 212 and 213 to the common return conductor 267. The polarity of this impulse, it will be noted, is determined-by the group selection made at the station and acts there fore. as an identification thereof.

The relay winding 212 will again he ,cnergized over this circuit to close a circuit from the positive side of battery 266 in a manner alre'adytraced through thedistributor brush 239 and contact 232. the second contact of relay 204, armature 224 and its back contact through the windings 206 and 207 to the mi dpoint of'battery 266tover the conductor 186.

The relay winding 206 is. energized over this circuit to complete an energizing circuit for the relay 17. from. the negativeside of battery 266, conductor 185 through the winding of relay 172, conductor 198, the left hand contact and armature 225 to the midpoint of the battery over conductor 186; Relay 172 is associated with the relay 307 and like the latter is the first or group selecting relay. 1

The energization of the relay 17 2 completes a locking circuit for itself from the negative side of hattery 266, through the winding of relay 172 as already traced through its first contact and over conductor 187, back contact 'and armature 222 and conductor 186 to the midpoint of attery 266.

A further result of the energization of relay 172 1s to complete an energizing circui the midpoint of the battery 266 over conduc-,

tors 199 and 186. The final supervisory circuit is completed over the third contact of re lay 172. The energization of the relay 205 opens all the group selecting circuits of which,,-f or-simplicity, only one is shown at armature 224 thereby preventing any further group selection from taking place.

The distributor brushes-239 and 479-operating in synchronism now reach their respective'contacts 233 and 483 simultaneously. A circuit is now completed from the negative side of battery 477 through the contact 495 of relay 402 over the segment 483 and distributor brush 479, the back contact and armat-ure 472, conductor 269, the armature 227 and its back contact, the windings of relays 2'12 and'213 in series to the midpoint of battery 477 over common return conductor 267. This impulse as in the previous case, is controlled by the selecting relay energized at the substation and thus identifies the final selectionl The relay Winding 212 is energized by this negative impulse andcloses its armature 243 over its left hand contact. A circuit is now completed from the negative side of battery 7 266 through left hand contact and armature 243, the distributor brush 239 and contact 233, conductor 188, winding 153 and 152 to the midpoint of battery 266 over conductor 186.

The relay winding 1.52 is engaged over this circuit and completes an energizing circuit for the final selecting relay 169 from the negative 7 side of battery 266, conductor 185, the winding 169, the left hand contact and armature 154 to the midpoint of battery 266, over conductor 186. s

The relay 169 energized over this circuit to make the final selection locks itself upover its first contact from the negative side of hattery266 and through winding of relay'169 as already traced, its first contact, conductor 187 the back contact and armature 222 to the midpointof the battery 266 over conductor 186.

An energizing circuit is also completed for the relay 168 from the negative side of battery 266 over conductor 185, Winding of relay 168,"the second contact of the relay 169, conductor 193 to the midpoint of battery 266 over conductor 186 and a locking circuit is prepared for the relay 179 at the third contact of relay 169. A supervisory circuit is The dispatcher is thus apprised ofthecorrect'selecti'on at the remote point and he may now with assurance close his operating key to perform the selection desired. The distributors at the t-Wostations now rotate pass-,

ing from Contact to contact, but, no other selection can, be performed since the relay 168 at the otiice holds open all selecting circuits at itswcontacts, and the relay 401. atithe substation simultaneouslyholds open alliits se- .lecting circuits.

Thebrushes 156, 356, 479, and 239 rotating in synchronism will noivreach and operate contact closers 166,. 358, .489 and 2.42 rcsspectively. rThe closing of the contact 166 completes an ener izing circuit forlthe relay 179 :from the negative side of battery 266,

through the winding of relay 17 9, the contact of the closer 166 to the midpoint of battery 266over conductor 186. e

. The relay 179. is energized andcoinpletes a locking circuit for itself over its armature 'contact 182 from the. negative side of battery 266 through the Winding of relay 179, as already traced, front contact and armature 182, the third contact of the relay 169 over theu-last -contact of the relay 131 to the mid point of the batteryover conductor 186.

It will be noted that the final selection must agree witht-he code relay which is operated when completing alocking circuit for the relay 179 so :that even ifthe dispatcher negligently fails to notice a false selection such a false identification received at the of- V 5 .fice woulderender'the control operation \in effective. a c 7 e As we painted out above the relay 313 is at this time electrically locked at "the substation. its circuit being completed "originally tromthe negative side of battery 477, conductors-402 and 366, winding of relay 313,.the contact of the latch 358 to the midpoint of battery 477, over conductor 375. The lockin circuit for the relay 313 is completed over the circuit from the negative side of battery 477 over conductor 366, as already traced, the Winding of relay 313, front contact and armature 338,conductor 365, the fourth contact of the relay 402 armaturef496 and its backcontactto the mid point of battery 477. In a similar manner relay 418 is .ener ized over the circuit from the-negative side'of battery 477, winding of relay 418,-theccntact 489, to the midpoint of battery 477 and complctes a locking circuit for itself from the negative side, of battery 477, relay 418, the

front contact and armature 47 3, the front contact and armature 469 to the midpoint of battery 477.

At the oilice the relay 211 is'energized'over the circuit from the negative side of battery 266, through the winding of relay 211', the contact of the lever 242 to the midpoint of p battery 266-:and thereupon completes a lock? ing circuit for itself from the. negative .side

0f.battery266cthroughthe Winding of relay 211,..the front contact andqarmature. .228, conductor 19.4, the closedcontact 174,,the last contact of relay 131 to midpointfofgthebat v tery over conductor 186. 10 The selections at the ofiice and substations having now-been completed there is. a direct connection ;fr0n1the operating key at the offlee .to apparatus unit at the substation and a similar direct supervisory icircuit'from the 55 apparatusunit .to the: individual :lamps at the ofiice. ItW-ill be noted that-although the selectionvvas made by the means of qthe code combination of} impulses, that" the finally selected apparatus unit andsupervisory;infio diatorare connected to their-individual members over circuits cleared of any selecting apparatus. The dispatcher thus having direct connection to the unit: may either-open or close the Q circuit breaker or repeatedly open and close the unit'insuccessi'on if so desired. This feature is of a'decided. advantage as it enables meteringin a code system.

Since it is assumed that the dispatcher .defie sires-to close. the circuit breaker, 'a-circuit will be completed from the positive side of battery 266, the-conductor 184, the contacts 119 and 121 of the key 118: moved :to its upper 7 position, ring 113 brush 156,'ring:114 the contact 107 and 108 of the individual key 103, the front contact andarmature 1181-, con trol conductor183, the armature 359 and its front contact, ring 342, brush 356, ring 343,

conductor'l499 Winding-of relay 491v to the ino v midpoint ofbattery 266wover conductor 267. The armature 487 closes its righthand con-v tact to complete an energizing circuit from the positive side of battery 477 to the right handizcontactjand armatures' 487, conductor 5105 498, third contact of relay 402, windings of 'rrla-ys '407 and408 to the midpoint :ofbattery i The aniature 449ismoved toclose its right I hand contact thus completing an energizing 11o circuit for the solenoid 432 Which functions to close-t 1e circuit breaker. 431.1.

As the circuit bre-akermoves fromits open to closed position, pallet switch 434 closes its I contacts to complete-an obvious energizing "1 15 circuit-for the relay 406 Which'in :turn completes an energizing circuit for the relay 405, over armature 448 and its front contact. Upon the-energization of relay 406 but before the energizaticn "of relay 405 a momentary circuit is completed {for the relay 404' over-"contact 445 andnarmature 446 and-its back contact and front contact and armature 477. Relay 404 energizes: and completes" a locking circuit for itself over 'ar- 12 *mature 444 andwits front contact and ar-- anature. 452 and its back contact. A fur" ther result of the ene'r'gization of the relay 404 is :IO COllllDlGC-G an energizing circuit for 1 the relay 411' -jfrom-ground through battery, 130

' and unlatches the armatures 136 and 137 by 7 lamp 101 is .opened at armature'136 and a windingof the relay 411, front contacts and armature ofrelay 404,'back contact and armature of relay 413,-and back contact and armature of relay 409 to ground. Relay 411 locks itself over its first contact and the back contact of relay 428. The relay 411, which is the supervisory code-transmitting relay inclividual to circuit breaker 431, will now transmita codecombination of'impulses to the first station. Relay 411 is locked over a circuit including its first contact and back contact andarmature 452 to'ground.

An energizing circuit is completed for the relay409 from positive side of battery 477 over the last contact ofrelay 411 winding of relay 409 to the midpoint of battery and an energizing circuit is completed for the relay 419 over the next to the last contact ofrelay41 from the negative side of battery 477 through the winding of relay 419, through the contact of relay 411 to the midpoint of the battery.

The second and third contacts of relay 411 function to transmit a supervisory code individual to the apparatus units that is operated. Since, however, in this'case the selection has already been completed at the otiice, the code relay has no function as such at this time.

\ A supervisory impulse is,however,- transmitted from the negative side of battery 47 7 throughthe upper winding of relay 428, the

front contact and armature 451, the third contactof the relay 411, the back contact and armature 471, the front contact and arma- "ture 472, conductor 269,- t-he front contact and armature 227, conductor 195, through the third contact of the relay 172 to fourth'contact of relay 169, the armature 139 and'its back contact winding of relay'135 to mid point ofbattery 47 7 over common return conductor 267. Energization of relay 428, as a result of the transmission of supervisory sig nal,'opens the locking circuits of relays 404 and 411. Relay 428, upon energization, opens the'lockingcircuit of relay 411 traced above and this relay deenergizes.

Therelay 135 is energized over this circuit withdrawing latch armature'138.

An energizing circuit iscompleted for the relay 134 the negative side of battery 266, winding of relay 134, the back contact and armature 137to the midpoint of battery 266 over conductor 186.

Normally with the circuit breaker open, as already showmthe lamp 101 was energized over the closed contact and armature 136 from the negative side of battery to the midpoint of battery 266 over conductor186.

Upon the operation of relay 135, as already traced, the energized circuit for the circuit closed for the lamp 102 thereby giving the dispatcher a supervisory indication of the operation of the circuit breaker from the open tothe closedposition.

all the selecting apparatus is deenergize the relay 129 and relay 148. A

further result of the deenergization of relay 131 is to open the locking circuits of the relays 168, 169 and 179.

Simultaneously with the opening of the release key contact 124, the contact 116 is closed. When the distributor brush I156 crosses the segments 117 a circuit is completed from the positive side of battery 266 through the closed contact 116 to segment 117 andbrush 156, front contact and armature- 181,.conductor 183, front contact and armature 359, brush 356, segment 396Winding of relay 494 and over conductor 267 to the midpoint of battery 266. The code'and selector relays are so designated that they are held energized for a short interval of time long enough to permit the distributor brush to reach the segment 117 so that the relay 179 is tact and armature 181, conductor183, the

armature 359 and'its back contact, windings of relays 314 and 315 to the midpoint of battery 266 over conductor 375 and the common return-line267. r

Relay 314 is energized'and closes its-left hand contact to complete a circuit from the positive side of battery 477, over conductor 374, the left hand contact and armature 339, through the distributor brush 356 and segment 355, windings of relays 311 and 309 to the midpointof the battery477 over conductor'381. r

Relay 311 is energized to close armature 336 and its right hand contact. An energizing circuit is completed for the relay Winding 305 from the negative side ofthe bat-' tery 477-over the conductor 366 through the Windingof relay 305, the right hand contact and armature 336 to the midpoint of the battery 477 over conductor 381.

The relay winding 305 is energized to open the locking circuit of the selecting relays 307 and 402 at armature 329 and to open the locking circuit of the relay 312 at armature 331.

The deenergization of the relay 307 opens the energizing circuit of the relay 306. The

deenergization of the relay 402 opens'the energizing circuit of relay 401. In this manner restored to normal at thesubstation.

The deenergization of the relay 307 also opens the energizing circuit of the relay 421 which in turn opens the locking circuit of the relay 418.

As the distributor arm 479 reaches its seg ment 488 and distributor arm 239 reaches its segment 238, an impulse is transmitted from the positive side of battery 477 over the back contact and armature 468, back contact and armature 466, distributor contact 488, thebrush arm 479,- back contact and armature 472, conductor 269, armature 227 and its back contact and the winding 213 to the midpoint of battery 477 over common return conductor 267. As a result of the energization of the relay winding 213, the armature 243 closes its right hand contact and a circuit is completed from the positive side of battery 266, the right hand contact and armature 243, distributor brush 239, segment 238, windings 208 and 209 to the midpoint of battery 266.

The energization of relay 209 operates armature 226 to close its right hand contact and complete an energizing circuit for the relay 203 from the negative side of battery 266 over the conductor 185, the winding of relay 203, right hand armature contact 226 to the midpoint of battery 266. The relay 203 is energized to open the locking circuit of the relay 204. The deenergization of the relay 204 opens theenergizing circuit of the relay 205. In this manner the apparatus s restored to normal.

, Should an apparatus unit operate automatically at the substation end, the super: visory operations will be exactly the same a as described in connection with a control operation of the unit except that the code transmitted will be determined by the code relay energized such as 411 and 412 lnstead of by the selecting relays which have been closed. It will be noted that the code relays of all code circuits are multipled W1th those completed by the selecting units and will therefore function in the same manner. In brief, the operations which take place following an automatic operation of such a circuit breaker as 435 to its closed" position, is as follows: Relay 415 will energize to,,1n turn, complete an energizing circuit forthe relay 414 which, however, does not energlze before an energizing circuit is completed for the relay 413, which, in turn, locks itself up over its own front contact. The energlzation of the relay 413 completes an energizing cir cuit for the supervisory code-transmitting relay 412 and, at the same time, opens the energizing circuits for all the other code relays. As the distributor 479 now rotates, impulses will be transmitted over the supervisory line 269 to operate the windings'212 and 213 of the receiving supervisory relay. These supervisory impulses will then be repeated through the distributor 229'to' oper ate a group and final selecting relays which, in'turn, upon energization, will make a selection of one of the supervisory receiving relays in a manner which has been described in detail above. WVhen the supervisory code signals have been transmitted, a supervisory impulse will be" transmitted from ground throughbattery, the upper windingof' relay 499, the front contact. and armature of relay 414 through the third contact of reiay 412, the back contact and armature 477, thefront contact and armature 472, over the supervisory line 269' and through the contacts of the selectors energized'to the indi vidual supervisoryrelay which, upon en'e'r gization, will illuminatethe proper lamp in the manner which has been described in detail above. It should be noted that after the selection of the apparatus unit by a predeterminedcode combination of impulses the unit may be operated to its plurality of p'ositionswithout any further selection; that is, after the circuit breaker has been'selected the dispatcher may move his key to open and close the-circuit breaker successively as often I all of the direct control obtainable in the synchronous supervisory control systems with the protecting features of the code system and the simplicity and cheapness of the telegraph typewriter system. Although I have disclosed my invention in connection with the supervisory control system, it is obvious that it has ap'plicationsin any selective signalling system and I do not intend to-limit myself of thespecific modification' described; but, only in'so far as set forth 7 in the appendedclaims. i

v I claim as my invention:-

a second i station, a continuously operating v distributor at'ea'ch of said stations, apparatus units at said second stations, means including said continuously operating distributors'for second station, rotating distributors at each of said stations, apparatus units at said V is 1. In a signalling system, a first station,

ation, means including said distributor oper-" ative following the completev reception of said code forswitching said signalling line to an operative position, means including said signalling'line for thereafter operating said apparatus unit directly from said first station over said signalling line, a supervisory'line connecting said stations, means including anotherof said distributors at said second station for transmitting code combinations of impulses over said supervisory line, means including another of said distributors at said first station responsive to said code combination of impulses for conditioning one of said signalling devices individual to said unit for operation, means including said other distributors at each of said stations, operative following the complete transmission of said code combination of impulses for switching said supervisory line to its operative position, and means including said supervisoryline for transmitting a supervisory impulse individual to said operated apparatus unit.

3. In a signalling system, a first station, asecond station, continuously operated distributors at said stations, apparatus units at said second station, a signallingline connecting said stations, means, including. said distributor at said first stationofor transmitting code combinations of impulses to select an apparatus unit at said second station, means including said distributor atsaid second-station responsive tosaid code combination of impulses for conditioning one of said apparatus units for operation, and means whereby said signalling line is alternately employedjfor transmitting said code combinations ofimpulses and for transmitting operating impulses to operate the selected apparatus unit. 7 L r a 4.- In a signalling system, a first station, a second station, apparatus units at said sec.- ond. station, signalling devices individual thereto at said first station, continuously operated distributors-at each of said stations, a signalling line connecting said stations, means including one of said distributors at said first station for transmitting code combinations of impulses to said sec, ond station, means including one of said distributorsat said second station responsive to said; code combinations for conditioning one of said apparatus units for operation, means including other of said distributors at said second station for transmitting code combinations of impulses from said second to said first station indicative of said selection, means including other of said distributors at said firststation for conditioning one of said signalling devices individual to said apparatus unit atsaid first station for operation, means whereby said control line is employed to transmit both'said code combination of impulses forselecting a unit for operation and to transmit the control operating impulse, and means whereby the supervisory line is. employed to transmit both said code combination of supervisory signals for selecting the signalling device and the operating supervisory signal. I

. 5. In a control system, a first station a second station, a line connecting said stations, devices at the second station'to be operated from the first station'over said line and normally disconnected. therefrom, a distributor at each station, means for continuously operating the distributors in synchronism' with each other, means at the first station including the distributor thereat for transmitting code combinations of impulses to the second station, each combination being individual to one of the devices, means at the second station including the distributor thereat responsive to said code combinations of impulses for selecting the device individual to the combination and connecting'it to the lineindefinitely, means for at will operating the selected unit over said line from said first station and'means for disconnecting at will from the first station the device from'said me. 6, In a control system,'a first station, a second station, a plurality of apparatus units at the second station, each of said units being operable to a plurality of positions, a codeoperated selecting device at the second station, continuously-rotating distributors at said stations, a line connecting the stations, means including the distributor at the first station fortransmitting a code over said line tothe second station, said second station distributor being disposed to receive and dis tribute said impulses of the code to the selecting device to effect a selection of the desired apparatus unit and a connection of it to the line, and means for thereafter operating the selected unit from the first station from one to another of its positions as often as desired. g

i 7. In a control system, a first station, a second station,'a signalling line connecting said stations, apparatus'units at the second station, a rotating distributor at each station,

means for-continuously operating the distributors in synchronism, means including the distributor at the first station and thesignalling line for transmitting a code of impulses to the second station, a selector at said second station responsive to said code for selecting one of the apparatus units for operation, said rotating distributor at the sec- 0nd station being disposed to distribute said impulses to the selector to effect a selecting operation and means operable after the selection has been effected for directly connecting the selected apparatusunit to the signalling line whereby direct control of said selected apparatus unit is obtained.

8. In a control system, a first station, a second station, a signalling line connecting said stations, a continuouslyerotating distributor at each station, means for causing said distributors to operate in synchronous relation, a selector at the second station, means including the distributor at said first station for transmitting a combination of impulses to said second station, means including the distributor at said second station for distributing the impulses to the selector, and means for thereafter rendering the selector unresponsive to further impulses until the prelviously set up selection is restored to norma 9. In a control system, a first station, a second station, apparatus units and a metering device at the second station, a receiving device at the first station, a line connecting the stations, a distributor at each of said stations, means for continuously operating the distributors in synchronous relation means including the distributor at the first station for transmitting code combinations of impulses over the line, code-operated means including the distributor at the second station for selecting any one of said units from the first station, said code operated means being operable to select the meter device,

means including the distributors at both stations operative following the complete selecting operation for directly connecting the receiving device and the metering device through the line, and means at the first station for effecting the disconnection of said devices from the line at will.

10. In a control system, a first station and 11. In a supervisory control system, a first station, a second station, a line connecting said stations, apparatus units at said second station, means including a continuously-operating distributor for transmitting code combinations of impulses over said line from said first to said second station, means includin a continuously-operating distributor at sai second station responsive to said code combination of impulses for selecting one of said units for operation, and means including said distributors for providing a direct electrical connection between said selected unit and said first station over said line.

12. In a signaling system, a first station, a second station, a control line connecting said stations, apparatus units at said second station, operating means at the first station, continuously-rotating distributors at each of said stations, means including said continuously-rotating distributors for selecting said apparatus units for operation from said first station by means of code combinations of impulses transmitted over said line, and switching relays at said stations controlled by the distributors for switching the control line into connection with the selected unit and the operating means at the first station whereby said units, when selected, are maintained indefinitely'under direct control from I said first station.

In testimony whereof, I have hereunto subscribed my name this 27th day of May, 1926.

THOMAS U. WHITE.

a second station, a receiver device at the first station, a current-operated meter device and apparatus units at the second station, a line connecting the stations, a distributor at each station, means for efi'ecting continuous synchronous operation of the distributors, means at the first station including the distributor thereat for transmitting code combinations of impulses to the second station individual to said meter device and apparatus units, codeoperated means at the second station including the distributor thereat for selecting one of said apparatus units at the second station, and means whereby said selectingmeans associates said receiver device with the meter device and the line.

Images