US1671280A - Light support - Google Patents

Description

May 29, 1928. 1,671,280 E. H. GRIFFITH LIGHT SUPPORT Filed Jan. 6, 1927 V gvvowntoo WT 5:315:55: l}! I Patented May 29, 1928.

UNITED STATES PATENT OFFICE.

EDWIN H. GRIFFITH, or BALTIMORE, MARYLAND, AssIeNoR 'o WILLIAM E. noornn & soNs COMPANY, or BALTIMORE, MARYLAND, AGQRIEORATION or MARYL ND.

LIGHT SUPPORT, v

In factories and other locations where the lighting supports are subject to excessive vibration, incandescent electric light bulbs are of extremely short life due to destructive eflectofthe-vibration on the delicate filaments of the light bulbs;

The. present invention'relates to a support fora lighting fixture having yielding or shock absorbing features whereby the Vibration is absorbed and the destructive effect on the lighting filaments practically eliminated. The structure consists of a spring loop which I is open at the ends of the spring, one end of the spring being most conveniently connected to the outlet nipple and the other to the fixture.

The conducting cord or insulated cable is most conveniently supported on the spring as a guide.

In the accompanying drawings I have illustrated a support embodying the features of my invention in the preferred form.

In the drawing:

Figure 1 is an elevation of the fixture support showing a socket, a light bulb and shade supported thereby in operative position.

Figure 2 is an elevation looking from the right in Figure 1, the socket being broken away intermediately and the bulb and shade there-by removed.

Figure 3 is a perspective of the flexible supporting or shock absorbing element.

Figure 4 is an elevation on a reduced scale of a modified construction, the view corresponding to Figure 1, with outlying parts broken away for convenience of illustration.

Referring to the drawings by numerals, each of which is used to indicate the same or similar parts in the different figures, the drawing shows a lighting bracket or support, the same consisting of an arcuate tubular fitting 1 supported on an outlet nipple 2, the nipple being threaded externally at 3 and the fitting being threaded internally to engage the same, or any suitable engaging means may be used. This fittingsupports a spring 4 in the form of a loop which is preferably a circular are having oppositely projecting engaging means or ends 5 and 5, which, as shown, are in a plane which is substantially tangential to the curve of the spring. I

The fitting 1 is provided with means, for engaging the upper projecting portion 5 of the spring 4, the said engaging means in the loop 4, the said end 5 being preferably providedjwith 'an eye 11' through which the point .of the hook is passed.

The fitting 8 has a threaded, or any preferred engagement 9 at its lower end with a socket or sockets 12 or any suitable lighting fixture. The single socket shown supports a lighting bulb 14 and a shade 15.

Current is supplied by means of a suit able conductor, shown in the form of a flexible insulated cable 16 which is led downwardly from a source or outlet box through the nipple 2 to the uppper fitting 1 from which fitting the cable is passed around the spring loop 4, being supported and guided thereby on the outer surface of the same remote from the ends 5 and 5, the loop serving as. a guide and support for the cable, as shown, though this arrangement is not essential. The cable16 is led from the loop to and through the lower fitting 8 to the socket or sockets 12.

The socket, shade, bulb, etc., being of sufiicient weight to slightly flex the spring, obviously vibrations of the building, floor or ceiling 18, which carries the upper fitting and the nipple 2, are under these circun'n stances taken up by the spring and their intensity so reduced and their peaks so equalized as to eliminate the harmful effect on the filament 19 of the light bulb, which in the absence of such feature, is quickly destroyed when subjected to the conditions described.

In Figure 3 I have disclosed a difierent form of the invention in which the spring loop 4 is connected to the arcuate fittings as a limiting term, but is used for convenience in describing any fitting suitable for the purpose in hand. p v r I have thus described specifically and in eta e re e 'e wd 1 di fere t. bod Inen'tof ftlie inyention in order thatthe na- ,ture and operation of the invention and the manner of using the same may be eleerly in are used descriptiyely;rether than in ,a limiting sense, the scope of the invention being defined in the claims, i

What I claim as new and desire tosecure by Letters Patent is:

1. A support for electric light bulbs comprising 21,11 open spring loop having free spaced ends,fittingsconnected to the oppo site ends of the loop, an outlet nipple connected to one said fitting and means for supporting a bulb socket on the other fitting, th ezloop comprising guiding andsupporting means for substantially. the entire length oidthe cable between the fittings.

2. An electric light bracket comprising a tubular fitting having a hook and adapted to engage enoutletnipples plate spring open loop having a pro ecting end with an eye to engage the hook, a second tubular fitting also having it hook, theother end of the plate spring having in tbe geg the seine, bulb supporting means connected to p the second fitting and a-conducting cable understood, however, the specific terrn's here lead through said fittings and guided and supported on ,t-he circumference of the spring.

3. A support for electriclight-bu lhs cornprising an open spring loopahaving the :ends

spaced and freeto move iththe fieigingl'oithe spring, the free ends oi": thespring being provided with, eyes and the support compris- 4e ing an electric fitting for :each end ,of the i loop, each said fitting haying a hook adapt-

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