US1988583A - Lamp - Google Patents

Description

Jan. 22, 1935. w. w. WORTHINGTON LAMP Filed July 20, 1933 FIG. 2.

//V VEN TOR W. W. WOR THINGTOIV ATTORNEY Patented Jan. 22, 1935 l v UNITED, sTA-TE s,

OFFICE York IApplica'tion July 20, 1933, Serial No. 681,253 :1 i

1 Claim.

The invention relates to a lamp and more particularly to the socket base of an electric lamp and an adjustable lamp shade and a holder therefor.

5 An object of the invention is to provide means for adjustably securing a shade to the socket base and for rigidly securing a socket within the base.

In accordance with a preferred embodiment of the invention herein shown and described, a socket base has an electric lamp'socket therein with pins extending from the lamp socket into corresponding holes in the base and a lamp shade holder rotatably secured thereto by means of a collar which also bears against an outwardly extending shoulder on a socket insulator located between the socket base and the lamp socket and resting on a shoulder in the lower end of the lamp socket. The lamp shade holder, usually called a harp, comprises a single piece or strip of flexible material having an upper curved portion with its inner surface concave, two vertical portions on opposite sides of the harp adjacent to the upper curved portion and having outwardly extending tapered pivot pins secured thereto, two lower 25 curved portions on each side of the harp adjacent the vertical portions and each having inner convex surfaces, and a ring which fits over the socket base and which is secured to the lower of the curved portions on either side. The lamp 30 shade is provided with two apertured ears, into which the outer portions of the pivot pins extend and which frictionally engage the pivotpins, to permit movement of the shade on the axis between the pins and to hold it in any desired position.

This construction provides a shade which can be readily rotated to any'desired position and tilted back and forth and held in any desired position and at the same time provides an emcient and inexpensive method of' securing the lamp socket in and the harp to the socket base. The shade can be readily removed by pressing inwardlyon the center curved portions to reduce the distance between the outer ends of the pivot pins to a distance less than that between the aperturedears of the shade. I

The invention will be better understood by reference to the following detailed description in connection with the accompanying drawing, in which Fig. 1 is an elevation view of a lamp embodying the invention, and a Fig. 2 is a sectional view taken along the lin 2-2 of Fig. 1.

Referring to the drawing, which illustrates a preferred embodiment of the invention and in which identical parts are indicated by the same reference numerals, a hollow upright fixture column 11 is suitably secured to a lamp base 12. A socket base 13 is secured to the upper end of the fixture column'll. 'The socket base 13, illustrated, is formed from a lower socket base por-.

,tion 14 and an upper socketbase portion 15,

although, if desired, the upper and lower portions could be formed integral with each other. Two depressions or holes 16 are provided on the upper side of the lower socket base portion 14. A shoulder 17 is provided at the outer side of the upper socket base portion a short distance from the top thereof. The inner surface of the upper socket base portion 15 is threaded at 18-.

'An electric socket 19 having a shoulder 20 near is assembled between the socket 19 and socket base 13 and rests against the shoulder 20 of the socket 19.

A lamp shade holder or harp is made of a single piece of flexible material such as phosphor bronze. It has an upper curved portion 26 with its inner surface concave, vertical portions 27 adjacent the upper curved portion26, central curved portions 28 with their inner surfaces convex adjacent the vertical portions 27, lower curvedportions 29 with their inner surfaces convex adjacent the central curved portions 28, a ring 30 secured to the lower ends of the lower curved portions 29 and outwardly extending tapered pivot pins -31 secured to the vertical portions 27.

A threaded collar 32 has a shoulder 33 which prevents the ring 30 of the harp 25 from being removed'from the socketbase 13 and permits rotation of the harp 25. Thelower portion of the threaded collar 32 contacts with the collar portion 24 of theinsulator 23 to prevent'the pins 21 on the socket 19 from being movedout of the holes 16 in the socket base 13 and thereby presocket base 13.

The shad e 35 has a pair of apertured cars 36 I secured theret'o.- The apertures in the ears 36 are slightly smaller in diameter than the diameter of the base ends of the pins 31 on the harp 25. The distance between the apertured ears 36 is such that when the shade 35 is assembled on the harp 25 a pressure is exerted by the harp 25 through tapered pins 31 on the ears 36 to provide a friction bearing surface between the pins 31 and ears 36 to permit adjustment of and hold the shaded35'iin anygdesired position; 2

Whilea single embodiment of the invention has been shown and described in detail, it is to be understood that the invention is generic in character and not to be limited by the particulate-.

embodiment disclosed since numerous modifications thereof may be made-by one'='ski-1l'ed mane art without departing from -{the' spiritbf-"appli- I cants invention, the scope of"whichistobe de termined by the appended claim.

What is claimed is: or H 1" In a lamp, a lamp base, a fixture column, a socket base, an electric socket, a rotatable harp, a shade, a shoulder on said socket base, said harp having a lower ring portion adapted to be mounted over said socket base with freedom to rotate thereon and in contact with the shoulder on said socket base, an upper curved portion, two central perpendicular portions;-:curved'lower, portions havingconvex lower inner surfaces, tapered pivot pins secured to the perpendicular portions, two-apertured ears on said shade adapted to be assembled over and in contact with the pivot pins on'said' harp, and means for securing said harp on said fisocket 1base with freedom for rotational movement only thereon and for locking said socket within said: base.

WILLIAM W. WORTHINGTON.

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