US2113134A

US2113134A - Electric light fixture

Info

Publication number: US2113134A
Application number: US66533A
Authority: US
Inventors: Edward C Godfrey
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-03-02
Filing date: 1936-03-02
Publication date: 1938-04-05
Anticipated expiration: 1955-04-05

Description

April 5, 1938. E. c. GODFREY ELECTRIC LIGHT FIXTURE Filed March 2, 1936 Pan/6w 5m ATTORNEY.

Patented Apr. 5 1938 ELEc'rRIo LIGHT FIXTURE Edward 0. Godfrey, Detroit, Mich.

Application March 2, 1936, Serial No. 66,533

4 Claims.

My invention relates to improvements in electric light fixtures and particularly to that type of light fixture wherein a light bulb is suspended by anelectric light cord from an elevated support and which cord is slidably adjustable lengthwise to position the bulb at difierent heights depending below the support. 7

An object is to provide a light fixture of the character described which is simple, inexpensive, and presents an attractive appearance.

Another object is to provide a light fixture wherein the cord. may be readily adjusted to position the light at the desiredelevation and the cord is releasably held at the position to which it i is adjusted. I

In a preferred modification of my invention I provide a bracket back which is adapted to be hung upon the wall of a room and which is provided with a supporting arm that extends forwardly from the back. An electric cord extends over the arm and through the back. A bulb is secured to the end of the cord that hangs down from the end of the arm. The opposite end of the cord passes through a recess in the rear surface of the back to a point of connection with'a source of electric current. The cord is slidable over the arm to adjust the height of the light bulb. Means is provided to retain the cord at any position to which it may be adjusted as to height. This means permits easy and quick slidable adjustment of the light cord for varying the height of the bulb.

Various additional advantages and meritorious features of my invention will more fully appear from the following description, appended claims, and accompanying drawing, wherein:

Figure 1 is an elevation of an embodiment of my invention with the bracket back in section,

Fig. 2 is an elevation of a fragment of the structure exhibiting a modified form of my invention with the bracket back in section on the same line as in Fig. 1,

Fig. 3 is a rear elevation of a fragment of the structure shown in Fig. 2,

Fig. 4 is a sectional view taken on line 44 of Fig. 3, and

Fig. 5 is a sectional view taken on line 55 of Fig. l.

I have shown my invention as embodied in a side wall lighting fixture wherein there is a bracket back [0 of any suitable conventional design secured to a side wall in any suitable well known manner. The bracket back here shown is broken away and the upper broken off end may be provided with a part adapted to be secured to the wall. This bracket back is provided with an arm 12 here shown as channeled in cross sectionas indicated inFig. 5. This arm extends through'an aperture M in the bracket back and is secured tothe rear face thereof. As shown, the arm is of arcuate formation and is provided with a bend [6 where it extendsthrough the aperture l4 in the bracket back as shown in Figs. 1 and 2. A light cord l8 supporting a bulb 20 extends over the arm through the channel thereof and through the aperture M in the bracket back into the recessed rear face of the backfrom where it may extend to a floor plug or a plug in the wall directly in the rear of the back.

It is apparent that the arm need not be of a channel shape.

It might be tubular or of any suitable shape to support the cord. Thecord is slidable over the-arm and through the aperture in the back so that the light bulb may be adjusted to different heights of suspension below the outer end of the arm.

As shown in Fig. 1 the aperture I4 through the bracket back is so formed that its upper edge is spaced but aslight distance above its lower edge so that the electric cord l8 when it is stretched from its point of support on the arm through the aperture [4 and passed over the lower edge of such aperture is held by the upper edge of the aperture to a distorted shape so that it snugly engages the lower edge of the aperture and the bracket arm. In other words, the upper edge of the aperture I4 engages the cord between its points of contact with the lower edge of the aperture and the bracket arm and holds it snugly against such points of contact so that the frictional resistance to its lengthwise slidable adjustment is suflicient to retain the cord in any position to which it may be slidably adjusted.

In this construction the cord is frictionally engaged with the support at three points, one on the arm above the aperture in the bracket back, a second on the rear face of the bracket back or lower edge of the aperture through the back and a third above and between these first two holding the cord thereagainst. The cord is stretched spaced above the arm between the two lower points of support and may be readily grasped at such spaced point for withdrawal in either direction for slidable adjustment.

The

frictional contact. The cord is deflected by the upper edge of the aperture downwardly forming what might be termed a three point frictional lock therefor.

In the construction shown in Fig. 1 it is preferable to use a rubber covered cord rather than a silk covered cord in order that the frictional resistance may be such as to retain the cord securely at adjusted positions.

In Figs 2, 3, and 4 I have shown a modified form of construction wherein there is a spring clamp 22 secured at its upper end as at 24 in any suitable manner to the rear face of the bracket back. This clamp holds the cord against lug or shoulder 25 although the aperture 14 in this case has a greater dimension than the aperture shown in Fig. 1. The clamp holds the cord against the lug 25 frictionally so that slippage of the cordl lengthwise is prevented.

To release the cord for lengthwise adjustment I provide a push button element such as shown in Figs. 2, 3, and 4. This element has a button or knob 26 provided with a shank 28 which extends through a passageway in the bracket and terminates inside of the bracket back in a pair of spaced apart arms 30. These arms engage the spring clamp 22. When the button is moved rearwardly-the spring clamp is actuated to release-the cordfor slidable adjustment. Upon release of thebutton the spring clamp forces it out to the position shown in Figs. 2 and 4 and the cord is held frictionally against the bracket back lug 24 or rather against the overlying portion of the arm l6 which is attached thereto.

- With a relatively smooth fabric covered cord when the spring is retracted by operation of the pushbutton the weight of the lamp and shade will cause the lamp to move downwardly. It may be elevated through manual movement of the cord in the opposite direction. The spring clamp 22 may be extended below the lug 25 and provided with adetent 23 below the lug 25 to deflect the cord over the lower end'of lug- 25 holding it securely frictionally against slippage.

What I claim:

1. In a light fixture a' bracket back, an arouate channeled cord supporting arm secured at one endto the back and projecting forwardly therefrom, said back provided witha cord opening therethrough super-imposing the pointof securement of. the arm to the back, an electric cord extending slidably through the channel of the arm and through the opening in the back, saidback provided with a part projecting toward the arm and frictionally engaging said cordadjacent the opening through the back to releasably hold the cord at any position to which it may be slidably adjusted.

2. In a light fixture, a bracket back having a recessed rear face, an arcuate channeled cord supporting arm attached at one end to the back and projecting forwardly therefrom, said back provided with a cord opening therethrough into 'its recessed rear face super-imposing the point of attachment of the arm to the back, an electric cord extending slidably through the channel of the arm and through the opening in the back and into the recess in the rear face of the back and. over a point of frictional engagement on the rear face of the back, a flat spring carried by the'back urging said cord yieldingly frictionally against said point of frictional engagement, and a push button element carried by the back and movable therethrough provided with a pair of arms embracing the cord and contacting the fiat spring, said push button element being perable to actuate thespring to facilitate slidable movement of the cord.

3. In a light fixture, a base member, a cord supporting arm carried thereby said base provided witha cord opening therethrough adjacent to the point of attachment of the arm to the base, a light cord carried by the arm extending slidably through said opening and over the arm, a flat spring secured to'the base and urging the cordfrictionally thereagainst to hold it releasably at adjusted slidable positions to which it may be'moved over the arm.

4. In alight fixture a bracket back having a cord opening therethrough, a cord supporting arm secured at one end to'the back below said opening and extending forwardly of the opening andupwardly in-front of said opening, an electric light cord extending slidably over the arm and through the cord opening in the back where by the cord is stretched spaced above the arm from apoi-nt of engagement with the arm spaced forwardly and above the opening to a point of engagement with the back adjacent to the bottom of the opening, saidback provided with a part holding the cord downwardly between said point'of engagement with-the arm and the point of engagement with'the rear face of the back.

EDWARD c. GODFREY.