US1926948A - Lamp mounting device - Google Patents

Description

/ C. IFFLAND LAMP MOUNTING DEVICE Sept. 12, 1933.

Filed Oct. 9, 1931 v Patented Sept. 12, 1933 Application October 9, 1931. serial No. sv,s0s

' 4 Claims. (01. 294-21) This invention has reference to lamp mounting devices that receive electric light bulbs for the purpose of inserting them in sockets in ceilings, side walls or other locations not accessible without the use of a ladder or stand.

Oneof the objectsof this invention is to-provide a device of this character that can be readily adjusted to difierent positions, from an upright position in which it'is used to place or remove a lamp in a ceiling so'cket,"to an angular position for access to a side Wall connection or socket.

Another object'of the invention is to provide a gearing of compact form'located between aface member or the supporting handle and an adjustable part thereon, that provides a bearing for a rotatable chuck spindle, whereby the gearing will always be engaged regardless of the adjustment of the parts to different angles.

A further object is to provide an improved gripping chuck that is readily detachable from the spindle for a substitution'of other sizes of chucks.

Another object is to provide a spring chuck with adjustment whereby the spring fingers can be regulated to cooperate with different sized lamps.

In the accompanying drawing showing one embodiment of my invention: v

Figure 1 is a front elevationof-my lamp'mounting device, showing in full lines the application thereof to' alamp mountedin the ceiling, and showing an angular positionof the shiftable part, in broken lines. i 1 Y Fig. 2 is a view looking to the left of Fig. 1, and showing the side of the device. 3

Figs. 3-8 inclusive, show detailiviews of the 'p 1 Figs. 9, 10 and 11 show the spring chucks, and Figs." 12, 13*and 14show a number of" the parts as they would appear if formed by stamping. shown in the drawing I provide a stationary head Z'thatfis hired to av handle. or staff '3- that may be of a single piece or formed of sections. "Thehead is fixed'to the handle infanyLsuitab-le manner as by bolts on rivets and fat; the inner side has a flat facenear the'topg'withthelower portion smaller and rounded to fit the handle orpole. n7 The top of y a flat face 4 with' a center boredthat receives a projecting hub '7 of a .suitableb'earin'g member 8 that is fretained againstfthe flat face i and adjustable to angular positions by swinging'fon the hub '7 as, an aXis."The"bearing rneinber 8 has an extendedtubular endlQ witha bore 10 adapted toform a bearingffor the chuckspindle 11. The'lower end of. the part 9 is bifurcated and offset at '12 which bifurcations have a cross bore 12' that receives a shaft 13. This shaft passes through the hub 7 as well as through the two arms or bifurcations, one arm is provided with a flange 8' having a face adapted to form a seat pin to rotate'with theshaft.

the head is (Sf circular form. having j engaging the pinion 21 on the shaft 13.

for the fiat face 4 of the'head. The head 2 has a curved slot 14 concentric with the bore 6. The member 8 has a hole 15 to receive a headed bolt 16 that is squared to prevent turning'of the bolt, and extends through this head to receive a winged nut 17 to clamp the head'to the bearing member. The opposite side of the head 2 has rim 2 that forms part of a concentric groove 18 to guide and hold a chain 19 in contact with a tooth pulley 20 that turns on the shaft 13. This raceway is interrupted at 18' and 18 to provide for inlet and outlet of the chain, that serves to rotate the pulley from the lower end of the pole by engagement by the operator. These outlets serve to properly guide the chain. The

pulley instead of being like afull grooved pulley that is difiicult to cast, has a kind of side contact with the chain by omittingone rim of the pulley groove, which pulley in cooperation with the head serves to retain the chain; The pulley '20 is-mounted on the shaft 13 which shaft enters the transverse bore 12' of the same diameter in both arms of the bifurcations, but the shaft is reduced in diameter at 13? to form a shoulder l3 which latter passes through the smaller of the two arms. The reduced part of the shaft pro vides a shoulder against which the pinion 21 is tightly clampcd by the sleeve nut 22 causing the The shaft has a thread at its outer endand the sleeve nut has a slot at its end to engage a wrench, the periphery of the sleeve having a bearing in'the bore 12". Endwise motion of the shaft is prevented by the sides of the pinion engaging the inner sidewalls ofthe two arms. The pulley is placed in position ,on the shaft with the chain enclosed between the head and pulley which is free to be rotated. ,By this arrangement of the sleeve nut, free space "'is'provided forthe manipulation of the winged nut which is close to this shaft end. The spindle .has ahead .30 threaded at its* outer end 31 to receive the'sleeve end of a spring chuck with a shoulder below' this head. The shaft rotates in .thelbore 10.and isreduced at 32 providing anothershoulderat, the threaded lower end for attachinent of a gear 33, that is held against the shoulder by a nut 34.. The gear 33 is shownas While. the spindle could be rotated by any other form of gear drive than'that here shown, I preferto' use spiral gears of a two to one ratio to provide more power to thef, spindle making a half turn to each full turn, of the drawing pinion.

It 'is also found by'this' type of gear that when screwing on or taking off the chuck-fromfthe head of/the 'spindle,'a kind of lock isprovided "between the gear teeth, somewhat like a lock between a worm and worm wheel, when trying to rotate the same from the reverse side of the drive.

By this means the chucks are readily removed :3

over the same, and still have a tight grip thereon when in proper position to enable the bulb to be rotated to its contact making position in the socket, and unscrewed therefrom, and further the springs are of such proportion to accomplishthis on several sizes of bulbs. So one chuck, for example will fit two or three small size bulbs, then a larger chuck is used to fitseveral larger sizes of bulbs, etc. V g

The chucks as shown, are provided with a sleeve 40 threaded to fit the threaded end 31 of the spindle 11. This sleevehas a series of slots 41 that receive the ends of spring fingers that are curved as at 43 to conform to the shape of the bulb. A sleeve 44 of rubber is forced over each spring to prevent metallic contact with the bulb, and also provide a friction grip on the bulb to permit its turning by the chuck; In Fig. 11 an adjustable chuck is shown with the spring fingers of greater length, which springs have a gradual spread from the lower part. A collar 47 slides on the lower portion of the fingers and will change their normal shape, and have a frictional contact to hold them in adjusted positions, which collar is retained in adjusted positions by projections 48 on the springs.

In Figs. 12, 13 and 14, I have shown the parts as formed by stamping, the head 2, Fig. 13 can be formed by stamping to serve every purpose, as well as the cast form thereof, shown in Fig. 4; the outlets 18'-18" are provided in this case by depressing the plate' 50 as at 51 to form the guide ways for the outlets of the chain at this lower end of the head.

The shiftable member 8, if stamped, as here shown in Fig. 12, is also in every way adaptable to serve the purpose; the hub 7 of Fig. 3 may be drawn as a sleeve 52 from the plate 53.

The pulley 20 if formed by stamping, as in Fig. 14 in view of the open side can readily be produced this way forming the teeth 55 therein as will be understood.

From the foregoing it will be noted, I have devised asimple structure that is adaptable to all the conditions required for removing or replacing lamp bulbs from inaccessible places.

The chuck is first centered with the bulb, and gently pressed thereover. The chain is then pulled to rotate the pulley and thereby the chuck which is a most convenient way, instead of rotating the pole as is usually done, and the breaking of lamps by this means is eliminated. The device can be produced at a low cost, etc.

What I claim is:

l. A lamp bulb mounting device, comprising a staff, ahead on the staff, a bearingmember pivotally mounted on the head to swing from an upright position to a position angular to the staff, a spindle rotatable in the bearing member,

a bulb clamp on the upper end of the spindle provided with spring arms to automaticallyclamp on the bulb, a shaft rotatable in the head, a pulley on said shaft, an endless chain on the pulley passing down to the lower part of the staff, a spiral gear fast on said shaft, a spiral. gear fast to said spindle and meshing with said gear whereby advance of the chain will rotate thev bulb gear fast on said shaft, a spiral gear fast to clamp, said bearing member being mounted to swing on the head in the axis of said shaft, and means to clampthe head in adjusted positions.

2. A lamp mounting device comprising a staff, a head on the staff, a bearing member pivotally mounted on the head to swing from an upright position to a position angular to the shaft, 2. spindle rotatable in the bearing member, a bulb clamp on the upper end of the spindle provided with spring arms to automatically clamp on the bulb, a pair of spaced apertured arms on the bearing memberwlth one arm bore smaller than the other, a shaft having a reduced end portion that is inserted in the smaller arm bore with the larger end portion turning in the other arm bore, the smaller shaft end being screw-threaded, a spiral gear mounted on the smaller shaft end,. a sleeve nut on said threaded shaftend clamping the gear thereonand which sleeve turns in the smaller arm bore, a pulley on said shaft, an endless chain on the pulley passing down to the lower part of the shaft, a spiralgear fast to said spindle and meshing withsaid gear whereby ad- Vance of the chain will rotate the lamp bulb, said bearing member being mounted toswing on the head in the axis of said shaft, and means to clamp the head in adjusted positions.

3. A lamp bulb mounting device, comprising a staff, a head on the staff, a bearing member pivotally mounted on the head to swing from an upright position to a position angular to the staff, a spindle rotatable in the bearing member, a bulb dampen the upper end of the spindle provided with spring arms 7 to automatically clamp on the bulb, a shaft rotatable in the head, a pulley on said shaft, an endless chain on the pulley passing down to the lower part of the staff, a spiral gear fast on said shaft, a spiral gear fast to said spindle and meshing with said gear whereby advance of the chain will rotate the bulb clamp, said bearing member being mounted to swing on the head in the axis of said shaft, means to clamp the head in adjusted positions, said bulb clamp being-removably screw threaded on said spindle, whereby said spiral gears provide a lock between the shaft and spindle to permit removal and: replacement of 'the'chuck without holding thegears against, rotation.

4. A lamp bulb mounting device comprising a.- staif, a. head on the staff, a bearing member pivotally mounted on the head to swing from an upright position to a position angular .to the its periphery, spring arms secured in said slots to automatically clamp on a lamp bulb, lugs on said arms, a fiat ring slidable on the arms to engage the lugs and hold the arms in adjusted positions, a shaft rotatable in the head, .a pulley on said shaft, anendl'ess chain on the pulley passing down to the lower part of the staff; a spiral said spindle and meshing with said gear whereby advance of the chain willrotate the lamp bulb,

said bearing member being mounted to swing on the head in the axis of said shaft, and means to clamp the head in adjusted positions. i

' CHARLES IFFLANTD.

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