US1066069A - Apparatus for governing and operating valves. - Google Patents

Description

'D'ARCY A. WILLSHAW.

APPARATUS FOR GOVERNING AND OPERATING VALVES.

APPLIOATIOH FILED MAR. 29, 1912.

DAZBJIY smswomnwrmis ew, or eemvous'rrn, SCOTLAND.-

srrarg'e rvs Fol; GOVERNING AND ornne'rme VALVES.

To ell 201mm it'may m 1 Be It known hat. I DA'nor Ainsnioa'rr-t W N 7 n4. w, a'sub ect 0L the lung of tzreat Britai rand lrelandpresiding at "iayniouth Engineeriii Works, Garnousti'e, in the county Of-" .Qra. r, Scotland, have invented new and usefulImprovements in 'i-Xpparatus. for Governing Operating Valves of which" the followingis 1a; specification.

This irivention'relates to a type of apparatus for governing and operating admission valvcsin suehh manner that the opening of a valve' wil l heinversely in propor- (ion to the speed of the engine of which the valve isa part.

Theinvention is applicable to the gas and air admission valves of an internal combus tlonen ine'or to any other valve of that type w ere it is desired to regulate the 'o'lume of fluid admitted to the cylinder.

In gas'en iines'zt-he rate of rotation of the crank slia-ft" determined by the quantity of explosive nurture admitted to the cyliuderiu a stated period,b y th erichhess of. the luixturc'and' by the amount, of compression of suc hnurture hefoiie ignition. 'lhe quan tity of miziture admitted is determined either by the hit; and rniss method, or by var in the amount re" uired for each ex- 39 plosion.

i apparatus; is applicable to the two methods "of. liegl'llating the supply of explosive mixture .fOlll'littIlZl'l combustion engil es, that is to say the quantity of explosive mixture can be varied tor each explosion, or the supply-Can entirely cut off for one or more reeiproeations of the piston.

In order that my invention and the rnai rnerflof utting the same into practice you bc .propel'ly llllgel'StQ Od I have hereunto appended aii explanatory sheet of drawing, in which the same reference n'u' merals 'are used to "indicate corresponding p te i j 'th' figur s ow v Figure-.1 is zi'part sectional elevationshowins th en a a r ngeme o t pperatus as applied toa gas engine. igl 2 is detail view of theearn roller lever'and Fi a view loo.l ing in the direction of the arrow AfFig. 2. i i In carrying out my invention I use a r0- tatory ball governor 1 which can cause a lever 2 to rise or fall, this lever being 'pivot ed at 21 to .the frame. Suspended at the free end of this lever is a rod 3 and on its lower end is adjustably fixed a setter block Specification of Letters Patent. Application filed Marc'n 29, 1912 Serial No. 686,984.

adjusting the jam nuts against the pressure of ,a spring.

trolled and operated ,by the governor 1, role rat-came July 1, 191s,

1 which can he madeto move up rdown o v a vertical guide 5 withinv certain limits On arotatoryg shaft. (3 operated from the engine crank shaft so. is a single hit cam T'in touch with cai'n roller S on a finger lever 9 pivoted ton engine at 10. At the free end ofthis leve Y o is an adjustable spring plunger 11' whose adjustment can be effected by means oftlie nuts 12 and lil. In practice I find ihadvis able to use a second spring plunger 14 si'rni I lar in design to that first mentioned for. the mason that if only one. plunger heused I the spring 15 has to he so stiff thatit' may fracture whereas it two spring plun er s he i used the springs will be subjected to ess ini dividual. stress. Inffrontof the lever 9 -isa similar lever 16 pivoted to the eng-ine'at 23' its free end having on it a push knob .17 '75 which can he made to come against-the stem of the valve 18 and thus open 'thevalv e- 0n the faceof this lever 10 and" opposite the li of (he presser block 4 is air-inclined? he. 19, This plane may be iuclin'esl opposite the \\'l\0lt. path of the presse riblockas is.- shown in the drawings, "or for a part it upper end it may-he parallel to the .presser f guide 5 as-sh'ewn by the dotted linesl ig-a 8 5 The apparatus operates asfol-ldwsffl'lhe cam 7 when rotating movesforward the finger lever 9 next. it which ,znovernent is transmitted throughthe spring plungers ll and 1 1- to the finger lever 1.6 in front, 99 this lever in turn moving iorward and lift-1 ing the adrnission valve 18 ofi' -its seat. The amount of valve lift is .cletermined position of the setter bloek-, which is con-19'5 tive to the inclined plane 19 on the lever 16 the excess notion ifianyof the-back 1c ver 9 heingtaken up bythe'springplungers. The springs operating the plungers ere-inore than strong enough'to open the valve Nhen the settler block isjat its lower position as shownhy the full lines 1 and 2 the engine is running below its *fne r mal speedftheinclined plane of the froht lever does not come in contact with thebloek 1 5' 4 and the two levers 9 and 16 can vibrate v to the full extent, this fully openings the valve 18 and when the setter block-is at the highest position it is in Contact with the inclined or the parallel portion of the pl of the front lever as shown by the dotted lines in Figs. 1 and 2 and. the push knob 17 cannot operate the-valve, the back leyer 9 at that time moving as before, the spring 1 plungers also moving out and in due to the want of movement of the front lever. intermediate positions of the setter block the engine load and from 50% downward.

tono load the hit and misssystem. Thiscombination is accomplished by the leverv 16 having a parallel face for a shortdistance down the inclined plane.

The action is as follows: At half load the setter block t is about the position Z. Im-

'mediately the setter block passes up beyond the point Z it is impossible for the lever 16 to move forward, thus shutting olf the from the engine. As the speed of the engine decreases the setter block falls below Z which allows the lever l6 to move sufiiciently forward as to open the valve18 wide enough to admit gas equal to approximately half engine power. 1

'Having now described my 'i.r'\vention, \-vhat- I claim as new and desire to ecure by Letters Patent is 1. In' apparatus for governing and operatively engaging the valve, a second vibratory lever at the back of the firstmentioned vibratory lever and provided with two spring push knobs and a cam roller, said knobs engaging said first mentioned vibratory lover, a rotatory cam actuated bythe engine shaft for operating the second lever and through it the first lever and the valve, and a rod adapted to be moved by Said pivoted lever, block adapted to co-aet 'iit said first vibratopy. levcrito limitatsani n A 2. In apparatus for governing and crating valves a vibrato'rylever v d d with an in'clincd face andi a; knob adapted to conLrol the valve in 'combir'latio fi with a second vibratory lever @lseedbthiial it, said second lever having two sprin 1 sh knobs engaging said first 'leverf'a'nd a am roller, and engine actuatedineans'adapted to' engage said cam rollertoflact uate said secondflever -asjdescribed.

In testimony whereofl have signed name to this specification in tliepicsen

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