US1423331A - Lighting fixture - Google Patents

Description

K. KELLER. LIGHTING FIXTURE.

APPLICATION FILED SEPT. 1 1921.

Patented July 18, 1922.

Application filed September 1, 1921. Serial No. 497,

To all whom it may concern:

Be it known'that l, KARL KELLER, a citizen of thellnited States, residing at the borough of Brooklyn, in the county of Kings, city and State of New York, have invented an Improvement in Lighting Fix-' tures, of which the following is a specification.

My invention relates to lighting fixtures, particularly portable clusters, and the prin cipal object of the invention is to provide means whereby the lamp sockets may be 3 either raised or lowered to position the ing from the top of the cluster, also allow 'ing for tapping the connections within the lamps with respect to shades which are oi various depths; also providing for the es:- clusion of dust from the shell, or the marring of the artistic or ornamental 'appea-rance of the fixture; another object being the provision of means whereby the lamp sockets may be secured in such position to which they may be adjusted without danger of accidental displacement; another object is to provide a shell with a removable cap, containing no hickey, whereby ample space is left within the shell to-facilitate the wirshell also connecting the stemwith the shell without threads thereby avoiding any liability of the stem snapping "oft" a the shell or unscrewing when shipped assembled.

The details of the construction are here inafter particularly described.

In the accompanying drawing:

Figure 1, is an elevation of a lighting fixture embodying my invention, the stem being shown broken away and its lower end in section.

Fig.2, is a sectional view showing the interior of the shell with the lamp sockets and tubular stem partly. broken away, and

Fig. 3, is a sectional view taken on the broken line 3-3 of Fig. 2.

Similar reference characters indicate like parts throughout the several views.

Referring to the drawings, 10, indicates a shell formed of sheet brass, or'other suit able material, and provided with a removable cap 11. This cap may be removably ecured to the, shell in any suitable manner.

Iuhave shown headed lugs 12, on the rim of the shell, with bayonet slots 13 on the rim of the cover or cap for this purpose. The shell 10, is supported upon the upper end of the tubular stem 14, the lower end of which may LIGHTZNG F.

Specificationof Letters Eatent.

be connected with any suitable base 15. The

shell may be attached to the stem in any" suitable manner, but to provide a firm coin nection. not liable to snap cit or unscrmv when shipped assembled, i prefer to reinforce the lower partoi' the shell by employing a ring or. washer l6. seated in an annular depression in the bottom of the shell.

the upper end of the stem 14., being reduced in diameter to pass through an opening in the bottom of the shell and through the o ening in the washer 16,- leaving an annular s ioulder 17, which abuts against the outer surface of the shell, the portion of the stem above the washer being upset over and upon the top surface of the washer whereby the parts are firmly fastened together without possibility of accidental separation.

Two or more spaced vertical slots 18, are formed in the shell 10, through which project the exteriorly threaded nipples 19, to which the. lamp sockets 20, are screwed.

the conductor wires (not shown). passing:

through these nipples and down within the tubular stem 14. The inner ends' of the nipples 19, are connected to shutter-flaps 21,

in any suitable manner. I prefer to reduce the thickness of the metal at these ends and pass the same through openings in the flaps, the projectingends then being upset over the inner surface of the flaps, and they may be further secured by solder. These iiaps 21,-are of greater length and width than the slots 18in the shell which they cover,

and are curved toconfcrm to the interior curvature of the shell.

Each oi" these flaps 2l is provided with an integral. lug 22, projecting on one side laterally thcret'rom and at approximately the longitudinal center of the flap. A threaded hole is provided in the end of each lug; 22. An oblong hole is also provided through the shell 10, a predetermined distance to one side of each slot 18, and set screws 23, pass through these holes and through the thread ed holes in the lugs 22, thereby pivotally connecting the flaps 21, with the shell 10, but permitting movement of the set screws 23.

lengthwise in the oblong holes in the shell,

when the screws are slightly turned upon the threaded holes in the flap lugs.

The set screws 23, not only act as pivot pins, but-also assist in retaining the flaps in the desired position to which they may be swung in order to raise or lower the nipples Elli 19, within the slots 18, as such screws may 'be tightened to bind the lugs 22, tightly against the inner surface of the shell 10, but are not alone depended upon, because as will be readily seen the lamp sockets 20, may be I screwed upon the nipples l9, sufficiently to tightly press against the outer surface of I the shell, thus there is a double pressure upon the shell one on its inner surface and the other-on its outer surface, whereby the nipples 19, may be firmly held in the desired position, thus positioning the lamps at the .adjusted in the manner above described,

without liability of accidental displacement,

they can, when desired, be readily changed to another angle by simply unscrewing the sockets and set screws sufliciently to remove the pressure of the sockets and-flap lugs against the outer and inner surfaces of the shell, the oblong 'holes'in the shell through which the set screws 23 pass permitting such adjustment without undue friction or tendency to bindthe flaps against the shell,

In the drawing I-have indicated a shade 24, by dotted lines. Y

My invention provides a portable-cluster adapted for use with shades of various depths or in which the lamps may be .positioned at different angles.

I claim as my invention: 1. A lighting at all fixture comprising a shell provided with a plurality of spaced slots, shutters having a lug on one side with a threaded hole therein, set screws passing throu h holes in the shelland through said threaded holes in the lugs whereby: said shutters are pivotally secured to the shell covering the slots therein at all times, andsocket nipples carried by said shutters projecting through the slots in the. shell.

2. A lighting fixture comprising a shell provided with a plurality of spaced'slots in its sides and lugs on its rim,a cap for the shell having bayonet slots in its rim to 'receive said lugs whereby the cap is removably secured to the shell, shutters having a lug on one side with a threaded hole therein, set screws passing through holes in the shell and through said threaded holes in the lugs whereby said sutters are pivotally secured to the shell covering the slots therein at all times, and socket nipples secured to the said shutters and projecting through the slots in the shell.

3. A lighting fixture comprising a shell provided with a plurality of spaced vertical slots, a cap for'the shell and means upon the shell and cap for removably securing the cap to the shell, flaps within the shell Ycoveringsaid slots, and each provided with a lateral lug having a threaded hole'in its end, set screws passing through holes in the shell and through said threaded holes in said lugs whereby said flaps'are pivotally securedto the shell, socket nipples secured tocsaid flaps. and projecting through saidslots, and a support for said shell;-

Signed by me this 26th day of August, 1921. i

, KARL KELLERj

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