US2278433A

US2278433A - Lamp fixture

Info

Publication number: US2278433A
Application number: US359300A
Authority: US
Inventors: August O Elting
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-10-02
Filing date: 1940-10-02
Publication date: 1942-04-07
Anticipated expiration: 1959-04-07

Description

April 7, 1942. o, ELTING v I 2,278,433

. v LAMP FIXTURE Filed Oct. 2, 1940 fmzv wz 424 12 2 2M Arum/v5) integral means to facilitate its Patented Apr. 7, 1942 UNITED STATES PATENT- OFFICE LAMP FIXTURE August 0. Elting, Chicago, Ill. 7 Application mm 2, 1940, Serial No. seam (a. ass-:44)

3Claims.

Theinvention relates to improvements in lamp fixtures and more particularly to novelly constructed electric candle support or arm and mounting.

In the manufacture of die-cast channeled fixture arms of the type herein disclosed. various means may be provided integral with one arm end to facilitate attachment of the arms to the fixture body. The various known methods of attachment frequently involve costly practices due, primarily, to difiiculties of assembly and the necessity of securely attaching said arms to prevent their being turned or twisted and thus loosened in their mounting.

It is therefore an object of the invention to provide a lamp fixture with radial channeled arms, each embodying novel means integral with one arm end to fixedly secure the arm against removal or turning in the fixture body.

Another object is to provide a die-cast one piece channeled fixture arm with a deformable fitting on one arm end to co-act with an irregularly shaped opening in a fixture body wall to retain the arm in place and the co-related parts.

Another object is to provide a fixture arm with being. rigidly attached to a mounting.

The foregoing and such other objects of the invention as will appear hereinafter as the description proceeds, will be more readily understood from a perusal of the following specification; in which reference is had to the accompa ins drawing, wherein:

Fig. 1 is a fragmentary elevational view of a lamp fixture embodying the present invention, showing parts in section.

Fig. 2 is a fragmentary horizontal sectional view of the fixture body, showing the arm end mounted but not secured therein.

Fig. 3 is a fragmentary inside elevational view. :grtly broken away showing the arm' end mount- Fig. 4 is a view similar to Fig. 3. showing the arm end securely attached to the fixture-body.

Fig. 5 is a longitudinal sectional view, partly in elevation, of a modified form of arm.

Fig.6 isaviewsimilartol'ig. 5, showing another embodiment of the invention.

Like numerals appearing in the'description of the various forms of arms identify corresponding parts in the drawing.

As best shown in Fig. 1, the invention is embodied in channel shaped arms indicated generprevent shearing of ally at I I, mounted in the circumferential wall I! Q of a fixture body it. The precise shape the arm is to take isdetermined by how it is to be mounted, and as shown, the arm ll includes an intermediate body portion 14 in the form of an inverted channel having a depending end wall II at one end to conceal the associated channel end.

An external circumferential flange II is formed integral with one arm end to providers shoulder H to support a candle cup il. As shown the latter is fitted loosely over an externally threaded nipple IO preferably formed integral with said arm end. The cup I! may be secured to the arm ,end in any approved manner and is shown held in place by the mounting end of the usual lamp I socket 2| threaded on to the nipple II. The other provided by said flange is suitably concaved to conform substantially to the contour of said wall;

It will be seen upon viewing Fig.- 3, that the provision of a flange II inwardly of the end of the arm defines a mounting nipple 2| which is inserted through an opening 20 in the fixture body wall. Obviously a smooth surfaced nipple would not prevent inadvertent turning or twisting of the arm in its mounting; consequently, suitable means is provided, preferably at the juncture of the nipple with the face of flange 24-, to prevent such turning.- As shown, a plurality of circumferentially'spaced substantially square radial lugs 21 are formed integral with the nipple and shoulder. These lugs are arranged to pass through terialformingthe'wall l2.

In assembly, the arm end isJnserted into the Power press. or the like,

Parts necessarily similar shaped recesses or notche II in the edge of the opening 2! and preferably are slightly greater in height than the thickness of the maopening 25 and the assembly placed in a suitable whereupon the nipple II is rolled outwardly radially and downwardly tightly against the inside face of the wall If. Rolling the nipple end distorts the lugs 21, primarily because of their slight projection inwardlyrof the face of the wall, sufficiently to spread or expand the material thereof and fill the associated recesses 28. This distortion or expansion of the lugs is important to the mounting shown primarily because machine manufacture of the quires that the opening I! are securely held against subsequent twisting and loosening by the abutment or the fiat sides of the lugs and the corresponding edges of the recesses ll which are substantially radial and consequently at right angles to the direction of the attempted rotation.

Figure 5 illustrates a one-piece channeled arm constructed substantially like that previously de.. scribed but shaped to be mounted in the bottom wall lib of the fixture body l3. In this embodiment, the candle cup l8a is formed integral with the free end of the fixture arm. The nipple I! on said end is cast without the threads and is subsequently threaded externally. The other arm end has a depending end wall Ilia to substantially conceal the associated channel end.

The channeled arm illustrated in Fig. 6, also is substantially like those previously described but in this instance is formed to be received in the top wall lie of the fixture body Hi. The free end of the arm includes an integral cupped flange Ila and has a tapped opening 28 communicating with the channel in the body to receive a threaded nipple 3|.

It should be understood that although the lugs 21 have been shown and described as being slightly greater in height than the thickness of the fixture body wall, said lugs may be of substantially the same height or slightly less than the thickness of said wall without impairing the strength of the mounting. rolling of the nipple sumciently distorts the lugs to urge them outwardly radially against the transverse edge of the recesses and subsequently distort them so as to eflect lateral-spreading to contact the radial edges of said recesses.

Although exemplary iorms oi! the improved cast arm have been illustrated and described, it is to be understood that the disclosure is not restrictive but is to embody such variations or modifications as will fall within the spirit of the invention and the scope -of the appended claims.

In such event, the

I claim:

1. In a lamp fixture comprising, in combination, a fixture body and radial fixture arms, said arms each including a body portion providing an inverted wire receiving channel, a nipple integral with one arm end in communication with the channel,an external shoulder inwardly of the free end of the nipple, at least one lug projecting from and having its side walls disposed substantially at right angles to the face of the shoulder, the fixture body wall being providedwith arm receiving openings each having 0. lug receiving recess, the nipples each extending through an opening with the lug fitting in a recess for keying the arm against turning, and the nipple being expanded at its free end to hold the shoulder against the outside face of the fixture body wall and prevent withdrawal of the nipple and lug from the opening.

2. In a lamp fixture comprising, in combination, a fixture body and radial fixture arms, said arms each including a body portion providing an inverted wire receiving channel, a nipple integral with one arm end in communication with the channel, an external shoulder inwardly oi the free end of the nipple, a plurality of lugs on the face of the shoulder circumferentially spaced around the nipple, the fixture body wall being provided with a plurality of arm receiving openings each having lug receiving recesses, the nipples each extending through an opening with the lugs fitted into the opening recesses for keying the arm against turning, and the nipple being expanded at its free end to secure the arm to the fixture body and spread the lugs radially to substantially fill the portion of the wall openings occupied thereby.

3. An article of manufacture comprising a fixture arm including a body portion providing an inverted wire receiving channel, at least one nipple integral with a body end and communicating with the channel, and a plurality of substantially square lugs circumferentially spaced about the nipple inwardly of its free end, the lugs being adapted to be fitted into recesses in the wall of a fixture body through which the nipple is extended so that when the free end of the nipple is expanded to secure the arm to the wall the lugs key the arm against turning relative to the fixture body.

AUGUST 0. ELTING.