US1663357A - Lighting fixture - Google Patents

Description

March 20, 1928.

G. STEFAN LIGHTING FIXTURE Patented Mar. `20, 1928.

UNITED. STATES GEZA STEFAN, OF CHICAGO, ILLINOIS.

LIGHTING FIXTURE.

Applicationl filed February 2, 19er serial No. i65,327.

The invention relates to lighting fixtures and has a special relation to adjustable floor or table lighting fixtures.

The object of the invention is to provide a lighting lixture of the character described which may be adapted for use as a floor lamp when in extended position and as a table lamp when in collapsed position.

A further object of the invention is .to provide a lighting fixture of the character described wherein the base and bod portion may form one ofthe electric con uctors for the lighting means and a single wire extending through the base and body but insulated therefrom may form the other conductor for said lighting means.

A further object of the invention is to provide a lighting fixture of the character described having a base and novel means mounted in said base upon which may be wound one of the conductors to the lamp lilaments for holding the said conductor taut in an desired adjusted position, said means also orming part of said conductor.

A furtherv object of the invention is to provide a lighting fixture,l of the character described having a base and a body, said body comprising telescoping members andl means rigidly secured to one of said memtained in close contact with each other at all times.

A still further ob'ect of the invention is to provide a lig ting fixture of the character described, which will be simple in construction, easy to assemble and inexpensive to manufacture.

With the foregoing and other objects in View, which will appear as the description proceeds, this invention consists in the construction, arrangement and combination of parts of my fixture whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in the appended claim, and illustrated in the accompanying drawings, in which;

, Fig. 1 is an elevational view shown partly in section of a lighting fixture embodying the invention;

Fig. 2 is a detail sectional view of the sleeve member employed for maintaining a close contact between the telescoping mem-` bers;y

Fig. 3 is a detail sectional view of the spring drum and insulating casing surrounding the same;

bers whereby the members Will be main Fig. 4 is a cross sectional view of the spring d rum upon which is yieldingly wound one of the conductors and Fig. 5 is a wiring diagram of the circuit for the lamp filaments.

Referring to the drawings 1 represents a hollow base for a floor or table lamp, said base being made of metal or any other suitable conducting material, and is provided at its upper end'with a screw threaded opening 2 adapted for receiving therein one end of a tubular metal member 3, the other end of which member 3 is adapted for receiving a second metal tubular member 4, which is adapted to telescope in the member 3. A set screw 5 extends through an opening in the upper portion of the member 3 for engagement with the member 4 whereby said members Vmay be rigidly held in any desirable adjusted position. The top of the member 4 has attached thereto in the usual manner the electric light sockets 6 and 7 for receiving the vlight bulbs 8 and 9, said bulbs being surrounded by a shade 10 secured in a well known manner to a portion of the tubular member 4 to bejsupported thereby.

The following novel structure is employed for supplying electric energy to the lam s 8 and 9. The wire or cable 11 from t e floor plug may be passed throigh an opening provided in the base 1 an one-of the conductors 12 of said cable may be secured by solder or in any other suitable manner to a portion of the base as shown at 13. The other conductor 14 of the cable 1l may be connected by solder or in any other suitable mann-er toy one end of a shaft15 upon which shaft ismounted for rotation a spring drum 16 open at` one end and encasing a spiral s ring17, one end of which spring is detac ably secured to a portion of the shaft 15 by means of a slot provided in one -end of said spring and a projection 18 formed on said shaft, and the other end of which spring is secured in a similar inanner to a projection 19 formed on the inside surface of said drum 16. The open end of v said drum is closed b a member 20 havin a horizontally exten ing collar 21 lforme at its up erl end for supporting said member 20 and rum 16 in their assembled position.

A bushing or sleeve 22 of insulating material is threaded into the opening 2 the to of the base 1, upon which may be thre ed the collar 21, said collar being insulated from the base 1 by means* of a provided in i -of the member 20 and is adapted .t-o receive therein the open end of the drum so 'as t'o4 make close contact between said drum and? member 20 at all times. Nuts 27 and 28 .are threaded on the ends of the shaft 15 for holding the drum and member 2O in assembled position. Tlie wire or conductor 14 is secured to one end of the shaft 15, and the circuit is continued through the member 20 to the drum16 to which is connected by solder or any other suitable manner one end of a conductor or wire 29, a portion of which may be wound around said drum and the remainder of which extends through the tubular members 3 and 4 to be connected to the sockets 6 and 7. The return line for this circuit is'through the tubular members and base to the cable 11. Because of the portion of wire 29 being wound on the spring drum themembers 3-and 4 may be extended to their full extended position to be used as a floor lamp or they may be collapsed to be used as a table lamp, the Vwire 29 being maintained taut at all times and o ut of the way in the body of the lighting fixture.

The drum and member 20 may be positioned in a 'box 30 of insulating material to insulate them from the base 1. The box 30 is open at its upper end and is provided on its sides with slots 31 for receiving the ends of the shaft 15, and nuts 32.0f insulating material are threaded on the free ends of said shaft for holding said box on the shaft in its assembled position.

The tubular members 3 and 4 must be maintained in close contact with each other at all times. in order to insure a good circuit. This is accomplished by positioning a slee-ve 33 of meta-l or the like, in the upper portion of the tubular member 3, the lower portion of said sleeve being slitted and bent inwardly to forni a plurality-of inwardly extending spring fingers 34 for engagement with the member 4. By this construction a good contact is always maintained between the tubular members and this is important as the body of the lighting fixture is to act as one of the conductors for the electric circuit to the lamps. A plate 35. may be arranged on the bottom of the base and secured thereto in the usual manner.

In the wiring diagram illustrated in Fig. 5

the completed circuit may be readily traced. The plus line enters the fixture through the opening in the base and is secured to the spring drum through which it passes to the wire 29 to the lamp filaments. The return line comprises the tubular members 3 and 4. and the 'base 1. VIn the case where the base 1 may be constructed of a non-conducting .materiah the wire l2-may be secured directly to a portion of the tubular member 3, the remaining structure being the same.

It will be noted that the invention provid'e-sa lighting fixture which may be simple to assemble and construct, conceals all of the conductingwires within the body of the fixture and which may be adapted for several different uses.

This invention is not to be understood as restricted to the details shown and described, since they may be modified within the scope of the appended claim,` without departing from the spirit and scope of the invention.

Having thus described the invent-ion, what I claim as new and desire to secure by Letters Patent is:

In a lighting fixture of the character described tlie combination of a base of metal having tubular telescoping members of metal mounted thereon, and electric light bulbs supported by said. telescoping members, an electric circuit supplying current to said bulbs, said base and tub-ular members forming one conductor for saidcircuit, an electric conductor comprising a single wire extending through said tubular members to said bulbs forming a -portion of the other conductor for said circuit, means cooperating with said tubular members for assuring a good electrical contact therebetween at all times, said means comprising a metallic sleeve having inwardly extending spring lingers formed thereon, said sleeve being rigidly secured to one of said tubular members in position for bringing the spring lingers thereof into yielding engagement with the other of saidtubular members, a metallic bracket mounted and supported within said base and insulated therefrom, a metallic vshaft mounted on said bracket, said shaft having .al metallic spring wound drinn mounted for rotation thereon, said drum having a'portion of said wire wound thereon for permitting the extension or withdrawal thereof as the telescoping members are 'eX- tended or collapsed, and means surrounding said drum for insulating the same from said base, said drum and shaft being electrically connected with said single wire wound thereon so as to form the remaining portion of said conductor for said circuit.

In testimony whereof I afiix my signature.

` GEZA STEFAN.

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