US1719835A - Lighting fixture - Google Patents

Description

LIGHTING FIXTURE I Filed June, 2o. 1927 A Trop/WW.

Patented `uly 9, 1929.

`UNITED STATES CHARLES 1. ENGLISH,

OF CLEVELAND, OHIO.

LIGHTING FIXTURE.

Application ined June 2o,

This invention relates to electric light fixtures and more particularly to that type of fixture which is provided with a shade and shade holder. i

It is an object of this invention to provide an improved electric light fixture of the character in question which is simple in construction and can be assembled by an ordinary workman in a minimum period of time.

Another object is to provide an improved means for rigidly securing the several parts of a light fixture together so as to prevent any relative movement therebetween.

Another object is to provid-e in such a fixture au improved means for adjusting the lamp socket relative to the shade holder.

Other objects more or less incidental or ancillary to the foregoing will be apparent from an examination of the following description in connection with the accompanying drawings.

Tn the drawings:

`Fig. 1 is a vertical sectional view showing the preferred form off my improved light fixture.

1i 2 is a side elevation showing an initial assembly of cert-ain of the parts.

Fi 3 is a side elevation showing the locking collar and pipe section in assembled relation.

Fig. 4 is a top plan of the parts shown in Fig. 3.

5 is a view similar to Fig. 1 illustrating a modified form ot my device.

Referring first to the construction illustrated in Figs. 1 to 4 inclusive, my improved electric light fixture which is designated in its entirety by 1 suspended from any suitable support such as the ceiling of the room, by a'chain 2. The fixture, broadly speaking, comprises a metallic shade holder 3 which may be ot any suitable shape or size, a glass shade 4, secured to the lower end of the holder 3, and a socket unit 5 comprising a socket member 6 and a supporting yoke 7 which carries the socket member at its lower end.

Referring in further detail to the construction illustrated, 8 indicates a threaded nipple or short section of pipe which has the screw threads 9 cut on its exterior surface and throughout its length. A locking collar 10 is threaded on the pipe section 8 and is provided with a plurality of tooth-like radial projections 11, 11. The projections are formed integral with the collar 10, and their ends extend outwardly and upwardly there- 1927. seri-a1 No. 199,891.

from. The supporting yoke 7 comprises a central part 12 which is provided with a centrally arranged opening 14 through which the pipe section 8 extends, and a plurality of depending parts or legs 15, 15 formed with apertures 16, 16 for the reception of the tooth- like projections 11, 11. The outer ends of the tooth-like projections extend upwardly'and beyond the depending parts 15, 15. The projections 11, 11 are held against turning movement relative to the yoke member 7 due totheir interlocking engagement with the sides of the apertures 16, 16.

The shade holder 3 is also provided with a centrally arranged o ening 17 through which the upper end o the pipesectionn 8 extends. When in assembled position the under side of the said holder will engage the upwardly extending tooth- like projections 11, 11. The length of the projections 11,11 is such as to insure a positive engagement with the under side ofthe shade holder, and at the same time permit thc shade holder to rest closely adjacent to the central part l2 ot the yoke (see Fig. l). Their length will vary with the size and shape of the particular shade holder used, as will be readily undei-stood.

A nut 18 is screwed to the upper end of the pipe section 8. This nut when screwed down will force the shade holder against the ends of the projections 11, 11 and will cause their sharp edges to bite into the metal of the shade holder thereby locking the shade holder 3, collar 10, yoke 7 and pipe section 8 against any relative turningmovement. In addition, the nut 18 may, if desired, be provided with the usual set screw- 18L to engage the pipe section 8. A suspension loop 19 is formed on the upper end of lthe nut`18 and is secured to the lower end of the flexible supporting chain 2. The nut 18 is provided with a passage 20. The lead wires 21, 21` for conducting the electric current extend downwardly through the passage 20 in the nut, and the bore of the pipe section 8 and are connected at their lower ends to the customary terminals on the socket member 6.

An electric light bulb 22 is secured within the socket member 6 andis arranged centrally within the shade 4, as shown. In or- `der to permit the use of bulbs of different sizes and shapes, the socket unit 5 may be, and in the construction illustrated is so constructed as topermit a` vertical adjustment Y and is provided at its outer end with a se-y ries of vertically spaced openings 23, 23. Each of the parts b is provided at its upper end with a screw threaded opening 24 which is adapt-ed to register with any one of the vertically spaced openings 23, 23.

A., The parts 15a and 15b are firmly secured together by screws 25, 25 fitting within the L The ring registering openings. The lower end of each part 15b is bent outward to form an attaching foot 15c and a screw threaded opening 15er is formed in each of the feet. The sock-A et member 6 is secured within a supporting ring 26 which is provided at its outer edge with a plurality of openings 26@L which are adapted to register with the openings 15d. 26 is detachably secured to the feet 15c by means of screws 27 litting the registering openings. y

The part 6 has been referred to as a socket member and the part 26 as a supporting ring, 'and it is to be understood that in so far as certain aspects of my invention are concerned any suitable formof socket may be employed and that the socket may be secured. to the depending parts of the yoke in any convenientvmanner. However, it is to be noted 'that in the specific construction illustrated the particular socket shown is Whatis known/in the trade as a sign receptacle and the ring 26 is what is known as a sign receptacle cover, these parts be@ ing designed primarily for `use rin electric signs. VThesign receptacle is nothing more than a tWo piece socketI which is secured together by meansof mating screw threaded parts. The sign receptacle cover is firmly clamped between the separable pieces of the sign receptacle as they are secured together. I prefer to use the sign receptacle and sign receptacle cover as they are standard parts made in large volume and available at relatively loW cost. i Y

In assembling the fixture,.the collar 1() is threaded on the pipe. section 8 to about the position shown in Figs. 1 and 3. The socket -unit 5 having been assembled with the desired adjustment of parts, the upper end of the pipe section is inserted through the opening 14 in the central part 12 of the yoke and at the same time the projections 11, 11 are guided through their respective apertures 16, 16 in the depending parts 15, 15. A rubber band 28 is then wrapped around the outerends of the ' projections 11, 11 and the mid portions thereof are permitted to lie fiat against the upper surface of the central part 12 of the yoke. The rubber band will serve to hold thepipe section, collar and socket unit in proper relation to one another, thereby facilitating the assembly of the remaining parts of the fixture. The lead wires are then passed through the bore of the pipe section 8 and are connected at their lower ends to the terminals cn the socket member 6. Thelooseends of the lead wires are passed through the opening 17 in the shade holder. The upper end of the pipe section is then inserted through the opening 17 in the shade holder. The lead wires are inserted through the opening 20 in the clamping nut 18 and the nut screwed down on the pipe section until the shade holder and projections 11, 11 are in positive locking engagement. This act-ion may crush the rubber band; but it doesnt matter as it has already performed its intended function. The bulb 22 is then screwed into the socket, and the glass shade 4 attached to the shade holder.

In Fig. 5 I have shown a modiiied form of construction, which is somewhat similar to that shown in Figs. 1 to 4 inclusive. As in the former construction, I provide an exteriorly threaded pipe section 30 which extends through a centrally arranged opening 31 in a shade holder 32. A collar 33 having a screw threaded opening 34 lis threaded on the pipe section 30 and has a plurality of tooth- like projections 35, 35 formed on its periphery which engage the under side of the shade holder 32. A clamping nut 36 is threaded to the upper end of the pipe section and when screwed down will force the shade holder 32 against the projections 35. 35, thereby providing an eilective means for locking the shade holder, collar and pipe section against relative movement. In this construction thc socket member is carried directly by the lower end of the pipe section. A socket member 37 is provided with a screw threaded opening 38 which receives the lower end of the pipe section. The socket member 37 is screwed upwardly on the pipe section 30 and hard against the lower surface of the collar so as to provide a lock nut action between the parts. In addition, the socket 37 may, if desired, be provided with the usual set screw 3S) to engage the pipe section 30.

In practice it has been found that it is highly desirable that the socket member andshade holder be secured against any relative turning` movement. This is especially true when the fixture is suspended by means of ieXible cord or chain, for in such a case it is necessary, in screwing and unscrewing the lamp, for the workman to grasp the shade holder in one hand and the lamp in the other. In prior proposals this requirement has been met by sweating the lamp socket and securing nut to the pipe section. That is to say, the threaded pipe section is heat ed somewhat and some suitable substance such as sealing wax is applied to the lower part thereof. The lamp socket is thenscrcived on `and thus irnily secured when the wax sets., provided the work is carefully done. rlhe pipe section is then passed through the central aperture of the. shade holder, 'the pipe section heated somewhat at its upper end, wax applied and the securing nut screwed down against the shade holder. rlhe above described construction and method of procedure requires a relatively large amount ot time and in practice is not always citeetive.

In my improved construction, the locking collar with its tooth-like projections biting into the under side of the shade holder provides an ctl'ective means for lockingthe pipe section, collar and shade holder against relative movement. In the construction shown in Figs. l to 4 the socket member is held against any turning movement relative to the pipe section due to the interlocking engagement between the depending parts ot the yoke and the tooth-like projections. In the construction shown in Fie. 5 the socket member is screwed tightly against the lower portion et the locking collar and as a result provides an etlective locl: nut action betweenthe parts. It will thus be seen that in both forms of construction the socket member is locked with relation to the shade holder thus facilitating the insertion and removal ot' the light bulbs. In addition, either oii the forms illustrated can be assembled in a minimum period. ot time.-

Furthermore, the parts of the structure are very simple and can be produced at low cost. `By securing the supporting ring 26 te the depending parts ot the yoke by tastenings which are readily accessible by simply removing` the shade, I have provided a construction Which permits the socket member and supporting ring to be dismounted and access had to the conductor terminals without disassembling the other parts ot the fixture. `The provision ot the vertically adjustable supporting yoke permits my im,- proved device to be used with bulbs ot' diti'erent sizes;

As previously indicated various modifications oit. the device as herein disclosed can be made without departing from the invention, the scope ot which is indicated by the appended claims.

What I claim is:

l. In a light tixture, the combination ot a shade helder having an opening therethrough; an exteriorly threaded pipe section extending through the said opening; a collar threaded on the said pipe section intermediate its ends; the said collar having toothlike projections formed on the periphery thereoit engaging one side of the said shade holder; a clamping device threaded on the said pipe section at the opposite side ot they said shade holder for forcing the shade hold- `er against the said projections whereby the shade holder; pipe section and collar are locked against turning movement relative to each other; and a lamp socket supported by the pipe section and secured against turning in relation thereto, by the said collar.

2. In a light fixture, the combination of a `shade holder having an opening therethrough; an exteriorly threaded pipe section extending through the said opening; a collar threaded en the said pipe section intermediate its ends; the said collar having tooth-like projections formed on the periphery thereof engaging one side of the said shade holder; a clamping device threaded on the said pipe section at the opposite side of the said shade holder for forcing the shade holder against the said projections whereby the shade holder, pipe section and collar are locked against turning movement relative to each other; a lamp socket supported by the pipe section and secured against turning in relation thereto by the said collar; and flexible means :for suspending the said fixture.

In a light iixture; the combination ot a shade holder having an opening therethrougli; a yoke comprising a central part having an opening therethrough and parts depending therefrom; an exteriorly threaded pipe section extending through the opening in the said central part and the opening in the shade holder; a collar threaded on the pipe sections below the said yoke member and having tooth-like projections termed thereon engaging the under side oi the said shade holder7 the said yoke and collar having an interlocking engagement to prevent turning movement relative to each other; a clamping device threaded on the said pipe section above the said shade holder for forcing the shade holder downwardly against the said projections whereby the shade holder; pipe section, collar and yoke are locked against turning movement rela.- tive to each other; and a lamp socket tixedly secured to the said depending parts et the yoke.

4l. In a light iixture; the combination et a shade holder having an opening therethrough; a yoke comprising a central part having an opening tl'ierethrough and parts depending therefrom; an exteriorly threaded pipe section extending through the opening in the said central part and the opening in the shade holder; a collar threaded on the pipe section below the said yoke member and having tooth-like projections formed thereon engaging the under side et the said. shade holder; the said yoke and collar having aninterlocking engagement to prevent turning movementrelative to each other; a clamping device threaded on the said pipe section above the said shade holder for forcing the shade holder downwardly against lill the said projections, whereby the shade holdl er i e section collar and oke are locked `ably securing the said lamp socket to the depending parts of thesaid yoke, so that the lamp socket may be adjusted vertically with relation'to the said pipe section but is held against turning movement relative thereto.

5. In a light fixture, the combination of a yoke comprising a central part having an opening therethrough and parts depending therefrom; an exteriorly threaded pipe section extending through the said opening in the yoke; a coilar threaded on the said pipe section below the said yoke and having tooth-like projections formed thereon, the said yoke and collar having an interlocking engagement so' as to prevent relative turning movement; means engaging the said projections for temporarily holding the said pipe section, yoke-and collar in assembled relation; a shade holder having an opening therethrough receiving the upper Vextended e end ot the said pipe section; a clamping device threaded on the said pipe section above the said shade holder for forcing the said shade holder downwardly against the said projections; anda lamp socket fixedly secured to the depending parts ol the said yoke.

6. In a light iixture, the combination of a yoke comprising a central part having an opening therethrough; and parts depending therefrom; an exteriorly threaded pipe see-` tion extending through the said opening in the central part of the yoke; `a collar threaded on the said pipe section below said yoke and having projections formed thereon having an interlocking engagement with the yoke; means comprising a rubber band engaging the said projections for temporarily holding the said pipe section; yoke and collar in` assembled relation; a shade holder having an opening therein receiving the upper extended end of the said pipe section; a clamping device threaded on the upper end of the said pipe section above the said shade holder for forcing the latter downwardly against the said projections; and a lamp socket fixedly secured to the depending parts of the said yoke. y

7. In a light iixture, the combination of a shade holder having an opening therethrough; a yoke comprising a central part having an opening therethrough and parts depending therefrom; an exteriorly threaded pipe section extending through the opening in the said central part and the opening in the shade holder; a collar threaded on the pipe section below the said yoke member and having tooth-like projections formed thereon engaging the under side ot said shade holder; the said yoke and collar having an interlocking engagement so as to prevent any relative turning movement; a clamping device screwed on the said pipe section above the said shade holder for forring the shade holder downwardly against the said projections; whereby the shade holder, pipe section, collar and yoke are locked against turning movement relative to each other; a lamp socket iixedly secured to the said depending parts of the yoke; and iexible means for suspending the said fixture.

8. In a light fixture, the combination of a shade holder having an opening therethrough; a yoke comprising a central part having an opening therethrough and parts depending therefrom; an exteriorly threaded pipe section extending through the said openings in the yoke and shade holder; means for securing the shade. holder and yoke to the said pipe section so that the shade holder, yoke and pipe section are locked against relative turning movement; a socket member; and screw threaded means accessible when thc shade has been removed from the shade holder for detachably securing the said socket member to the said depending parts of the yoke.

9. In a light fixture, the combination of a shade holder having an opening therethrough; a yoke comprising a. central part having an opening therethrough and paris depending therefrom; an exteriorly threaded pipe section exteiuling through the opening in the said central part and the opening in the shade holder; 'a collar threaded on the pipe section below the said yoke ineinber and having toothlike projections formed thereon engaging the underside oi the said shade holder, the said yoke and collar having an interlocking engagement to prevent turning-movement relative to each other; a, clamping device threaded on the said pipe section above the said shade holder for foreing the shade holder downwardly against the said projections; a lamp socket formed in two separable parts; and a ring member clamped between the separable parts of the socket and detachably secured to the freel ends of the depending parts of the yoke.

In testimony whereof, I hereunto afiix my signature.

CHARLES P. ENGLISH.

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