US1448942A - Universal fixture stem - Google Patents

Description

Mar, 20, 1923. 1,448,942.

C. H. HOCKEY.

UNIVERSAL FIXTURE STEM.l

Huso DEC. 5. 1921.

Patented Mar. ZG, 1923.

unirse STATES# CLARENCE H. noci-KEY, 'or CHICAGO, runners. l

l l UNIVERSAL FIXTRE STEM.

Application led'December 5, 1921. Serial No. 519,937. y

To all whom it 'muy concern: j

Be it knownthat i, CLARENCE Haloonni', a citizen of the United States, `residing at Chicago, in the count-y of @ook and State of Illinois, have invented a certain new and useful improvement in Universal Fixture Stems, of which the following is a specifica tion.

This invention relates to electric light fir;- tures depending from the ceiling of a room, and particularly to that class of such fixtures in which current carrying wires are concealed within tubular parts ofthe fixture, but emerge from said tubular parts near the ceiling.

The object of the invention is to provide such a structure with a novel form of wire carrying' tube, which can be readily straightened at a point near the ceiling so that the body7 of the fixture will hang true, even though the stud or other device on the ceiling to which the fixture is attached is not truly vertical, and to provide a novel form of insulation for suspending the wirecarrying tube in proper insulated manner from the ceiling stud.

The invention consists in means for attaining the foregoing objects, which can be easily and cheaply made, which is satisfactory in use and is not readily liable to get out of order. More particularly, the inven-` tion consists in many features and details of construction hereafter more fully set forth in the specification and claims.

Referring to the drawings, in which like numerals designate the same parts throughout the several views- 4 Figure l is a vertical sectional detail View of a complete mechanism illustrating this invention in its preferred form;

Figure 2 is an outside view of that portion of the mechanism which renders the device straightenable;

Figure 3 shows the device of Figure 2 almost entirely in section.

The device of this invention is shown in the drawings as applied to a depending stationary stud or support 10 attached to a `conventional ceiling` l2 by any suitable means, as for instance, screws 14, this stud being provided in its lower end with the usual screw threads 16 to which any suitable electric fixture device may be applied.

In the preferred form of the invention shown in Figures 1 to 3, the mechanism of this invention, detachably secured to said screwthreads and suspended from the. stud l0, comprises generally a metallic tube 18 engaging the threads 16, an insulating block 20 threaded into the lower end of the tube 18, but more particularly fastened in place by a cross pin 22, and a metallic tubular wire carrying member 24 having its upper end threaded onto the lower end of insulating member 20, and ymore particularly pinned thereto by the cross rod or pin 26. This ruse of thc intervening insulating `block 2O betweenthe two tubular membersl and 212, secured 1n place by the two pins 22 and 26,

is very important because it providesan ef- 7 fective insulation and prevents the breaking' of the connection. f

The tubular member 24; is novel in that in the processof making it the wall portion, at a suitable point near its upper end, is contracted vinto the thin stem 30, wherein the interior walls of the tube Q4 closely approach, andin thelcase here illustrated actually contact, each other, as clearly appears in Figures l and 3, the result being that the resistance of the tube to bending laterally of its axis is in such a large measure removed that it is possible for the operator to `take hold of the lower portion of the tube 24 and move it, within limits, in the arc of a circle about the contracted portion 30 as a center, thereby enabling the operator, if the stud 10 is not truly vertical and consequently the tubular member 18 is not truly vertical, to adjust the tube 24: until it is vertical from the point 30 downward. The ability to do this enables the owner of a room equipped with such a fixture to properly adjust the device to normal vertical position, either on its original installation or after the fixture has been accidentally struck and bent out of vertical position.

rlhe tube 24 is provided with a perforation 32 in the curved part of the contracted wall through which electric current carrying wire 34 may readily pass from the interior of the tube 24 up to the ceiling l2, as shown. The

fact that the contracted portion 30 practically closes the tube 2d at the point where this perforation 32 is located, produces the effect of putting this perforation 32 in approximately the central a-Xis of the tube 24, with the result that when an operator tries to thread a wire 34 from the bottom of the tube 24: upward and thence out of the tube, the upper end of the wire will easily find this opening 3Q, thus dispensing with the arresta necessity ol fishing in :trom the side of the tube'.

The drawings show theupper halfvof the fixture enclosed in an ornamental, conical cup or cap 36, Whichdoes not enter into the invention, and they'also showa chaih'devi'ce 38 of' conventional form attached to the lower end of the tube 24h/by the screw threads 40, this also Without novelty herein.

What I claim is: Y e e l. In an electric light fixture, a hollow tube adapted to have an electric Wirepassed through it, said tube having nea-r one end a contracted portion which weakens the strength of the tube at that'point and 'allows it to be bent about that point, there ,being in said contracted portion a perforation through Which a Wire in the tube may pass out of the tube. 1

2. In an electric light fixture7 a. non mally straight rigid tube -provided atr its upper end for attachmentto alixed support, and with a contraction 'intermediate the ends of the tube weakening the resistance of the tube to lateral bending', whereby when the fixture is mounted in a ceiling or-the like, the tube may be bent laterally `tor the purposes set forth. t A

3. In a 4device ot the class described, a n'ormally vertical tubular member through Which a Wire may pass, provided with a perforation near itsupper end through which a Wire may passent and means formed in said tube above and immediately adjacent to saidperforation to render the tube readf ilyklaterally bendable at that point Aand to insure ready egress Aoft a Wire end at that point When a wire is threaded up through the tube.

4L. A hanger for electric light lixture,`comprising a casing provided atl one end with a neck Weakenedbetween its ends for bending which has means 'for detachably securing it to an outlet 'for electric Wires. y e y 5. A lighting fixture stein having its up,- per end adapted for engagement Awith a wiring installation, and vhaving' a reduced portionadjacent said upper end adapted to be easily bent. for adjusting the stem relative to said installation, y Y

In Witness whereof, I have hereunto subscribed my naine in the presence ont two witnesses.

CLARENCE H'. HOCKEY.

llYitnesses: I l

.DWIGHT B. CHEM/ER, RACHEL MrN'rz.

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