US1727150A - Electric-lighting fixture - Google Patents

Description

Sept. 3, 1929. E. c. WHITE ELECTR IC LIGHTING FIXTURE Filed Oct. 7, 1926 INVENTOR.

Patented Sept. 3, 1929.

UNITED STATES PATENT OFFICE.

ERNEST CANTELO WHITE, or New YORK, N. Y., Ass'IeNoR or oNE-HALr TO B. FEN- TON FISHER, or PHILADELPHIA, PENNSYLVANIA.

ELECTRIC-LIGHTING FIXTURE.

Application filed October 7, 1926.

My invention relates to the construction of all types of electric lighting fixtures which include or support a lamp socket and a lamp shade.

One of the objects of my present invention is to provide a simpler and more economical form of combined socket cover and shade holder. Another object is to provide a form of socket cover which may be more quickly 1o wired and at the same time provide for its secure support. Another object is to provide for supporting glass shades in such a manner as to allow free expansion of the glass when heated by the lamp and to provide for ventilation. Reference is also made to my copending application Serial No. 128,537, filed August 11, 1926, in which I utilize standard socket interiors with a minimum number of additional parts to form a complete fixture.

My present invention is alsoa specfic development of this construction for the special uses which will be described.

In the accompanying drawings Fig. 1 is the side view of an electric hanging fixture with the upper portion of the cable and the ceiling plate omitted; Fig. 2 is a horizontal View looking upward of the socket cover only; Fig. 3 is a vertical cross section of the parts shown in Fig. 1 with the lower portion of the lamp and shade cut away and the table and socket interior shown in side elevation; Fig. 1 is a top view of the socket interior only; Fig. 5 is a side view of the shade supporting ring; Fig. 6 is a horizontal view looking upward of the shade supporting ring.

In carrying out my invention according to the illustrated embodiment thereof I provide a socket cover 1 of moulded insulating material having an opening 2 for the passage of what is known in the trade as type SJ 2-conductor electric cable 4 and a chamber 3 adapted to accommodate a knot in the cable as shown. I also provide a standard socket interior 5 having a base 6 of insulating material formed with two lugs 7, 7 extending beyond the diameter of the screwshell of the socket and adapted to fit into two of the four notches 8, 8 8, 8 formed in the socket cover so as to provide a seat for the said lugs in the socket cover and to prevent rotation of the socket interior with respect to the socket cover. The lower end of the socket cover is provided with a number Serial No. 139,991.

of grooves 9 extending through from the inside to the outside thereof. 7

I also provide a shade supporting member 10 having a threaded portion 11 adapted to' be passed through an opening ina shade and screw into the internal threads 12 of the socket cover 1 and having a flange 13 larger than the opening of the shade to provide a support for the shade. A flange 13 provided with a member holes 1 1, 141 spaced on a diameter larger than the threaded portion 11 and smaller than the diameter of the opening in the shade. The shade supporting member 10 also has an internal cylindrical opening 15 large enough to slip the brass screw-shell of the socket interior 5 but too small to admit the lugs 7. The length of the shade supporting member is such that when screwed into the socket cover the end 16 thereof is brought to bear against the lugs 7 to seat the socket interior firmly in position in the socket cover and leave a vertical space between the diameter of the socket cover and the flange 13 slightly greater than the thickness of the glass shade 17.

It will thus be evident that the glass shade rests upon the flange 13 and is secured against any material displacement therefrom by the end of the socket cover but that the shade is not gripped tightly between the socket cover and the flange 13 and may therefore expand and contract freely in all changes of temperature.

It will also be observed that there is a ring of space 18 between the edge of the glass shade and the neck of the shade supporting member. This space communicates with the grooves 9 above and the holes 14 below to provide a series of ventilating ducts through which the heated air on the inside of the shade may escape. As the space 18 is practically continuous even though the shade be shifted toward one side or the other of the holder, this ventilating means is effective regardless of the angular position of the holes 1& with respect to the grooves 9. The simplicity of my improved construction will be further understood from the following description of how it is assembled:

The cable 4 is passed through the opening 2 in the socket cover 1 and out the opposite end. A knot is tied near the end of the cable and the two conductors connected. to the terminals 20 of the sea s interior. The cable is then pulled back into the socket cover until the knot in the cable is seated in the chamber 3 and the socketinterior put into place with the lugs 7 occupying two of the notches 8. The shade supporting member 10 is then taken in one hand and inserted through the opening in the shade and screwed into the socket cover until it seats against the lugs 7. An electric lamp 19 may then be inserted through the opening 15 and screwed into the socket.

It should be observed that my improved holder is especially adapted for shades which are open at the bottom or which have a bottom opening large enough to admit the operators hand to screw the shade supporting member into place and also to admit the lamp. The shade is protected against falling while being assembled as it is resting on the shade supporting member and over the operators hand so that the other hand is quite tree to hold 'the socket cover while the shade supporting member is screwed into it.

It will be understood, of course, that the socketcover 1 may be adapted for rigid support on a Wall or ceiling and a material part of my invention still remain and that vari ous modifications in form and materials may be made. The invention herein described includes what I claim as new, which is:

1. An electric lighting fixture including a lamp socket member having a screw-shell, lugs carried by one portion of the socket member and projecting beyond the diameter of the screw-shell, a socket cover having a threaded opening at its lower end large enough to pass the'lug bearing portion of the socket'meinber, spaced recesses in the socket cover above its threaded opening adapted to accommodate the lugs to prevent rotation of the socket member with respect to'the socket cover when the former is disposed within the flange to support a shade and spaced openings in the flange adapted to co-operate with the grooves in the socket cover to provide ventilation for the shade.

8. An electric lighting fixture including a lamp socket member, a socket cover having a threaded opening, radial grooves in the end of the socket cover surrounding the threaded opening, a shade supporting member adapted to screw into the socket cover and having a flange to support a shade, spaced openings in the flange adapted to co-operate with the ra dial grooves in the socket cover to provide ventilation for the shade, and means integral with the lamp socket member to provide a stop for the shade holding member when screwed into the socket cover to prevent tightening the shade holding member against the shade.

4. An electric lighting fixture comprising a lamp socket member having radial lugs projecting laterally therefrom and a depending screw-shell, a socket cover having an opening at its lower end for the insertion of said socketmember and its screw shell therein and recesses above said opening to receive said socket member lugs, and means separable from said socket cover both to retain said socket member in place by engagement with said lugs thereof andto support a lamp shade in depending extension from the lower end of said socket cover.

5. An electric lighting fixture comprising a lamp socket member having radial lugs projecting laterally therefromand a depending screw-shell, a socket cover having an internally threaded opening at its lowerend for the insertion of said socketmember and its screw shell thereinand recesses above said opening to receive said socket member lugs,

and a combined socket member retaining means and lamp shade support, comprising an externally threaded sleeve to screw into said internally threaded opening of said socket cover around said screw-shell and to bear upwardly against said socket member lugs, and an outwardly extending annular shade-supporting liange at the lower exterior end of said sleeve to underlie said socket cover.

{Signed at New York, N. Y., on this 6th day of'October, 1926.

ERNEST 'GANTELO WHITE.

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