US1276849A - Extensible incandescent lamp. - Google Patents

Description

W. C. WITHERSPOON.

EXTENSIBLE INCANDESCENT LAMP.

APPLICATION men JULY 9. um.

1 76,849 r Patented Aug. 27, 1918.

Kai/5 BY 4W 4 ATTO R N EY ard 20f a chandelierof any usual construcwirtmivr c. wir'niinsroon, or BAKERSFIELD,

Exrnnstnnn mcANnEscnitrLA vrr.

To all whom it mayconcern: up

Be it known that I, WILLTAMIG. WITHEB SPOON, citizen of the United. States, residing at Bakersfield, in the countyvoi- Kern and State, or California, have invented. certain new and useful Improvements inExtensible Incandescent Lamps, of which the ,following is a specification, r

. My 1 invention relates to improvements in electric lighting devices, and it consists, of the constructions, combinations .and arrangements herein. described and claimed.

An object of my invention is to provide an extensibleelectric'light. arranged on one of the arms of an ordinary chandelier, a suitable spring actuated. current. wirebobbin beingmounted on the chandelier and having suitable pawl-andratchet devices, so engaged as to permitthe extensionof one or theincandescent. bulbs to efiect illuminationcof a remotepoint Another object ofthe nvention is .to-provide a ball and socket iastener for receiving the extensible electric light whereby the electric light. may be replaced. and held in its position. on oneofthe chandelier arms whenthe electrlcllghtis not inuse.

Other ob ects. and advantageswill appear from the following ,speci f ication, reference being. had. to. the accompanying .drawings, in which:.

. Figure lisasideelevationfof a chandelier illustrating the application .of my 5111- vention, f 1

Fig. 2' is a verticalsection of the bobbin box mounted .on the chandelier which contains .the spring actuated. bobbin 7 around which the extensible current wire :is wound, Fig. 3.,is ahdetail sectionof theball and socket -fastener, 1 I

Fig. 4 is aninverted section on the line H101 Fig. 2,31161 I Fig. 5 is an enlarged fragmentary sectionalview of a portion ofthe device, i tratingi specificallythe f electrical connectionswiththe conductor heads to be. hereinafter referred to. y Y

By reference .toI'Figs; land2 of the. drawings,.it will bepobservedthat a bobbin box -1is mountedbn the lower end of the standtion. A plurality .of arms: ,3 v the bobbin box 1 andgare. arrangedto sup- .Specification of Letters Patent.-

bearing i and supporting. sleeve the sleeve 17 is securelylwedg 17 is tubular. as will cent. lamp,

,heads128 which are m e, withthfe cord 19 and are Supported beneath radiate from CALIFORNIA.

Patented ne e- 1 913.

Application filed J'u1y.9,191'7. qSeria1No.179,451.

5 as shown 1n port the incandescent bulbs One of the radiating arms with a bulbular enlargement Fig.3. A correspondingly shapedso'cket 6 formed atthe topof a removableincandes cent lamp 7 is adapted to slipiover the bulbs ular enlargement 5 and be'retainedfthereon. The socket 6. isflared to provide a throat way for facilitating the 7 removable incandescent. lamp 7 to the arm 3 of the chandelier. The s'ocket 6 andthe flared throat-way. 8, are slitted as illustrated in Fig. 1' to give .the socket'lthe required resiliency and permit its engagement over the enlargemnt 5.: I

Arranged Within the box 1v isflabobbin 9 which includes the upper and lower flanges 10 and 11. The bobbin? is-hollow as at 12 andv is counter-bored as at 13 to admit; a

attac nnent of the stafi 14. The staff 1 11 is securedto the base i of the bobbin box'l as, shown in Fig. 2. The flange 10 of the bobbin, 9 is recessed as at 15 to receive the-enlargement 16 of a sleeve 17 hasafflange .18 by means of which v ed inthetubular 2" of the chandeller. The'sleeve be'observedin Fig. "2

standard and receives (the cord other cords hereinafterre- 17. The

v 19; The cord 19'may .be tap fed t'any. placelabove the flange 1.0 i of the, obbin9 tosupply currentto theli'n- ,candes'cent lamp dot the M1113. This cord as well' as the, i

ferredflto, consists ofthe usual two wires insulated .from'each other and having a fab- .ric covering,.as illustrated in Fig.3, 1

. Theicord 20 whichjsupplies f current vto theremovable incandescent lamp 7 I is not tapped directly to the current cord 19 as I are the cordsthat. supply theotherincandesfor the obvious reason that this soon. twlst ofi when the bobbin and thenin the. other dicord would .9 turns first in one .lGCtlOIL: The cord the. bearing 16 by adielectric bushing 29, i

The conductor-heads I 2.8 are orcourse stationary. and the terminal? ends I bear 20 is. held in a dielectric T bushing 20 in the body of; the bobbin 9',and I has Eterminal, ends 27.,

ectrical 0911116611011 against the conductor-heads as the bobbin 9 turns. The cord 20 is therefore always alive when the snap-switch at the incandescent lamp is closed. V A

The bobbin 9 around which the cord 20 wound, is actuated in one direction by a coiled spring 21 which occupies the hollow portion12 of the bobbin. The coiled spring 7 21 is secured to the stafi 14 at one end and at the other end to the wall of-the hollow portion 12. The latter point of attachment .of the spring 21 may be bound adjacent to of the fingers when the spring which a bearing 22 secured to the bottom of the staff 1 1 in any suitable manner.

The bearing 22 has aflange 23 which bears against a counter-recess 24 in the lower flange 11 of the bobbin 9. It is of coursedesirable and necessary that the bobbin 9 rotate smoothly without rattling.

The flange llof the bobbin 9 has ratchet teeth 25 arranged on the upper surface of the periphery. A finger-operated pawl 26 engages the ratchet teeth and holds thebobbin 9 from rotating against the tension of the spring2l. The pawl 26 has a fingerpiece 26 which is accessible from the outside of the casing 1. I

The op ration of the device is as follows. The manner of assembling the device may be readily understood from Fig. 2, wherein it will be seen that the bobbin 9 is slipped into position on the bearing 16 in the casing The bearing 22 is then adjusted in the proper position on the staff 14 which is car ried by the lower part of the casing 1, so

that the-staff 14 extends into the counterin 9. g p I The spring 21 is ordinarily under little tension and is put under tension only when the lamp 7 is pulled away from the bulb 5 and the cord 20 is extended. When the lamp '7 is removed from the socket and the cord 20 is pulled on, the cord 20 will unwind from the bobbin 9 which will then rotate and tension the spring 21. At the same time, the pawl 26 will ride over the ratchet teeth 25 and finally when the pull on the cord ceases, held in position by the pawl 26. 7 .Should it now'be desired to restore the lamp 7 to its place on the socket 5, the extended cord 20 is then grasped about in the middle with one hand while holding the lamp with the same hand and reaching up to press down on the finger-piece 26 with one of the other hand. This releases the ratchet teeth 25 from the pawl 26 is now under tension, will turn the bobbin 9 in a counter direction and rewind the cord 20 thereon. Instead of using a pawl and ratchet devicein connecball-clutch. As an incidental feature of the construction, it should be observed that the corners of the various pipe brackets of the chandelier, are fully rounded so that the cord and more particularly the cord 20, may not bind when itis pulled outas above stated.

It should also be observed that the end of the staff 14 is supported at its upper end in the counter-bore 13. The stafl? 14 is of course fixed to the lower portion of the casing 1, but were it not for the support at the counter-bore 13 for the end of the stafi, the staff might become loosened with a bad effect on the bobbin 9. I

.While the construction and arrangement of the device as illus'trated'in the accompanying drawing is that of a generally preferred form, obviously modifications and changes therein may bemade without departing from the spirit of the invention and the scope of the appended claims.

I claim:

1. In a device of the class described, the combination of a bobbinbox, a shaft carried by'said bobbin box, a bearing carried by said shaft at a point above the lower end thereof, a sleeve projecting into the opposite end of said box,-said sleeve having an enlargement upon its inner end, a bobbin having recesses in its ends, said bearing fitting within the lower recess and said enlargement fitting within the upper recess, thus rotatably supportingthe bobbin, and means for normally urging said bobbin to rotate in one direction. V

2. In a device of the class described, the combination of a bobbin box, a shaft carried within said box, a bearing carried upon said shaftfa sleeve extending into. the opposite end of said box and having a bearing upon its inner end, a bobbin having recesses in its ends carried by said bearings, said bobbin aving a counter-bore, a bushing carried by said sleeve and extending beyond the inner end thereof, a conductor carried by said bushing, conductor heads carried by said conductor, said conductor heads being within' said counter-bore, a conductor or cord having their. terminal endsv extending into said counter-bore, said terminal ends engaging said conductor heads, means for urgin said bobbin to rotate in one direction and means for holding said bobbin againstaccidentally rotating.

3. In a device of the class combination of within said box, shaft, a sleeve extending into the opposite end of said box and having a bearing upon its inner end, a bobbin aving recesses in its ends carried by said bearings, said bobbin having a counter-bore, a bushing carried by said sleeve and extending'beyond the inner end thereof, a conductor carried by said bushing, conductor heads carried by said In testimony whereof I affix my signature conductor, said conductor heads being Within presence of two Witnesses.

in said counter-bore, a conductor having WILLIAM C. VVITHERSPOON bare terminal ends extending into said coun- Vitnesses: 5 ter-bore, and said terminal ends engaging Lows V. BENNETT,"

said conductor heads. 0. B. SMITH.

comes at this patent may be obtained for five cents each, by addressing the Commissioner of Eaten,

Washington, D. 0."

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