US1549333A - Lighting fixture - Google Patents

Description

Aug. 11, 1925.

F. H. ROBINSON LIGHTING FIXTURE Filed e t '7, 1924 J m 2/M5MWM Patented Aug. 11, 1925.

UNITED STATES OFFICE.

FRANK H. ROBINSON, O'F BAYONNE, NEW JERSEY, ASSIGNOR TO NATIONAL METAL SPINNING & STAMPING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

LIGHTING FIXTURE.

Application filed February 7, 1924. Serial No. 691,258.

To all whom it may concern.-

Be it known that I, FRANK H. RoBINsoN, a citizen of the United States, residing at Bayonne, in the county of Hudson and State of New Jersey, have invented a certain new and useful Improvement in Lighting Fixtures, of which the following is the specification.

My invention relates to that class of sup ports for lighting fixtures which are designed to lessen the liability of causing a short circuit in the assembling of the fixture and has for its further object to materially decrease the expense of assembling.

My means for accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings in which,

Fig. 1 is a side elevation of my support for lighting fixtures.

Fig. 2 is an end view of the same.

Fig. 8 is a cross section on the line 3-8 in Fig. 1.

Fig. 4. is a plan view.

As shown in the drawings the loop is formed with two substantially vertical arms 1 and 2 which arecarried by a hollow or cylindrical stud 3. This stud is preferably provided with a peripheral shoulder which engages the body of the fixture in the usual manner.

The hollow 4 in the stud 3 extends entirely through the stud so that there are free or unobstructed passages 5 and 6 on each side of the arms which form the loop.

A threaded opening 7 is formed in the junction 8 of the arm of the loop inwhich may be mounted the rod 9 which 1s employed to secure theparts of the body of the fixture rigidly together. This rod serves to keep the wires apart from each other within the cylindrical shed and the body of the fixture. lVhere the wires are not separated from-each other within the body of the fixture, as where a close nipple and hickey are employed in the usual or standard construction, there is great danger of the insulation being chafed olf' the wires 11 and 12 and as they are necessarily in close juxtaposition a short circuit occurs and the fixture must be taken down in order to rem edy the trouble. By my construction since the wires are separated by the wall caused by the junction 8 of the arms 1 and 2 such danger is largely obviated. It may be found desirable in practice to slightly round the edge 10 of the stud so that the insulation will not meet any sharp edge when the wires 11 and 12 are drawn out to the arms from which the lights depend.

It will be apparent to persons who are skilled in the art that by the use of my improvement I not only entirely dispense with the nipple and hickey, customarily employed in similar constructions, thereby voiding the expense of their purchase; but that the rod which is used in my construction is not by any means as expensive as either one of the devices whose use is obviated by my improvement so that a saving in material is effected.

There is the further advantage that the wires 11 and 12 can be passed through the openings or passages 5 and 6 in a fraction of the time they could be threaded through a nipple and hickey so that a substantial saving in the time required for assembling is effected with a consequent decrease in the outlay required for time and material to build a fixture.

Having thus described my invention, what I claim and desire to secure by Letters Patent of the United States is:

1. A one-piece loop having an annular base portion, upstanding arms projecting from the base portion having their ends closed together to receive the link of a supporting element, a bridge piece between the arms and disposed above the said base portion.

2. A loop, as claimed in claim 1, in which the diameter of the opening of the base is greater than the cross-section of the arms and bridge in one direction so as to arrange opposite segments of the opening in the base beyond the sides of the bridge to pr0- vide unobstructed passages for the distribution of conductor wires.

3. A loop having two arms, a hollow stud which forms the base of the loop, said hollow extending entirely through the stud forming a free passage on each side of the junction of the arms, a peripheral shoulder on said stud, there being an internally threaded recess in the junction of the said arms for the purpose set forth substantially as described.

FRANK H. ROBINSON.

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