US1024732A - Shade-holder for electric-bulb sockets. - Google Patents

Description

0. W. LUCAS. SHADE HOLDER FOR ELECTRIC BULB SOCKETS. I APPLICATION FILED 0OT.2, 1911.

1,024,732. 1 Patented Apr. 30, 1912.1

%%M; 3% Jawsm n3 4 UNITED STATES PATENT OFFICE.

CLARENCE W. LUCAS, OF DECATUR, ILLINOIS, ASSIG-NOR TO FARIES MANUFACTURING COMPANY, OF DECATUR, ILLINOIS, A CORPORATION OF ILLINOIS.

SHADE-HOLDER FOR ELECTRIC-BULB SOCKETS.

Specification of Letters latent.

Application filed October 2, 1911.

To all whom it may concern:

Be it known that I, CLARENCE W. LUCAS, a citizen of the United States, residing at Decatur, in the county of Macon and State of Illinois, have invented new and useful Improvements in Shade-H0lders for Electric-Bulb Sockets, of which the following is a specification.

This invention relates to shade holders for incandescent electric lamps and has for its object to provide a strong, simple and inexpensive device for rigidly and permanently attaching the shade to the holder and removably securing the holder to the lamp socket by an easily operated spring clamp actuated by a rotatable compressing ring, which while securely fastening the shade and shade holder to the lamp socket by a swiveled or rotatable friction connection, so that it cannot fall or be pulled off said socket, nor become loose, shaky or out of place; will per- Init the shade and its holder being rotated around the lamp to any desired position and be there retained by the frictional connection of the shade with the lamp socket.

With these and other objects in view the invention consists of the novel construction, combination and arrangement of parts here inafter described in detail, pointed out in the claims and illustrated in the accompanying drawing, in which- Figure 1 is a central vertical sectional view of the improved shade holder applied to a lamp socket, the latter and a lamp carried thereby being shown in elevation. Fig. 2 is an elevation of the shade holder with a small portion of the shade connected thereto. Fig. 3 is a top view on an enlarged scale of the shade holder without the com pressing ring. Fig. 4 is a bottom view on the same scale, of the compressing ring. Fig. 5 is a central sectional view of the compressing ring. Fig. 6 is a central sectional view of a slightly modified form of the shade holder and shade. Fig. 7 is a sectional view of a modified form of the compressing ring.

Similar reference characters are used to designate like parts in all the figures.

In the drawing, A indicates the improved shade holder made of thin resilient sheet metal capable of being shaped by suitable tools to the desired form. The lower end 10 of the shade holder is cylindrical in shape, its edge having an outwardly inclined flange 11 folded inwardly upon itself for a short distance and then outwardly as at 12 between which latter fold and the double fold 11 the upper edge of a truncated conical shade 13 is inserted and firmly held by pressing the folds tightly against opposite sides of the shade as shown. This construction forms a simple, cheap and permanent attachment for the shade to its holder and avoids the use of solder, screws or rivets.

The lower cylindrical end 10 of the shade holder A may be of any desired length and is preferably connected to an upper cylindrical portion 14 by means of'an integral arch 15 through which arch a plurality of holes 16 are made for the escape of heated air within the shade. WVithin the upper portion 14 of the shade holder A is a circumferential groove 17 into which fits the usual rib 18 on the electric light socket 19. Vertical slots 20 are made in the upper and lower, portions of the shade holder dividing the same into a number of spring fingers 21, three being shown in the drawing but this number is merely optional and may be increased or reduced as desired. Immediately above the groove 17, preferably in the center of each finger, is a short outwardly bulged lug or cam 22, while from the upper edge of each of said fingers is a small outwardly turned lip 23, here shown as adjacent a slot 20 and equally spaced from one another.

Surrounding the lugs or cams 22 is a compressing ring 24 by means of which the fingers 21 are pressed inwardly against the lamp socket 19 and the rib 18 thereon. The ring 24 is of such diameter and width as to fit loosely on the upper portion 14 of the shade holder A, when the latter is disconnected from the lamp socket, between the rib 25, within which the groove 17 is formed, and the lips 23 on the ends of the fingers 21, said lips extending over the ring to prevent it from slipping off or otherwise becoming disengaged from the shade holder. The ring 24 is an integral structure preferably formed of sheet metal bent or spun into shape to form an outer wall 26 and a substantially parallel inner wall 27 into which latter wall are made as many notches 28 as there are lugs or cams 22 on the shade holder 11. Those portions 29 of the inner wall between the notches 28 act on the lugs or cams 22 when the ring is turned and press the fingers 21 against the lamp socket 19. The notches 28 in the inner wall 27 of the ring do not extend entirely to the told 30 thereby leaving a strip 31 of metal joining each portion 29. These strips, and the portions 29 in connection with the continuous told 30, give great stifiness to the ring, and, from its construction, insuring lightness and economy in manufacture. The outer wall 26 of the ring may be straight or exteriorly curved as shown, the curved form is preferred as it increases the rigidity of the ring.

Instead of making the ring hollow and of spun sheet metal, it may be solid, see 2% Fig. 7, and east or otherwise formed with the interior notches 28 to receive the lugs or cams 22, as in the preferred construction.

The shade is attached to the lamp socket by first turning the ring 2 1 to bring the notches 28 opposite the lugs or cams 22 on the fingers 21. The lamp socket 19 is then inserted. in the shade holder A and forced downwardly until the head 18 on said socket enters the groove 17, the fingers 21 yielding outwardly to permit this. The ring is then rotated a short distance to engage the portions 29 of the inner wall 27 ot' the ring with the lugs or cams 22 on the fingers 21, and thereby press said fingers with sutlicient force against the lamp socket, as to firmly secure the shade hold-er thereon without liability of its accidental detachment, but not so tight as to prevent rotation or swiveling of the shade holder on the lamp socket.

hen the shade holder is to be employed with other forms of lamp shade than the truncated conical shade hereinabove described, as for instance a parabolic shade illustrated. in Fig. 6, a hole of suitable shape is made in the side of the shade 13*" and the lower end 10 of the shade holder A attached thereto in the manner described. In this form of lamp shade or reflector, it the bridge 15 connecting the lower and upper portions 10 and 1% respectively of the shade holder be made in the shape shown in Fig. 1, the length of the shade holder will be such that when the ordinary lamp is inserted. in the socket 19 the loop of the incandescent film will be at one side of the focal axis of the shade or reflector. To obviate this detect, the bridge is bent inwardly or collapsed within the part 10 of the shade holder, as at 15%. thus shortening said shade holder su'tl'iciently to properly position the lamp as shown by dotted lines, Fig. 6.

In the modified type of shade the ability to attach the shade holder on a lamp socket by a simple construction, that, while holding it securely in place, permits the shade to be turned axially of the lamp by simply rotating the shade to the desired position where it is held by the frictional connection between. the shade holder and the lamp socket without employing other securing means, is a very desirable feature economically and of practical use.

Having thus described the invention what I claim as new is 1. A shade holder lniving a lower portion permanently attached. at its end to a lamp shade and an integral. upper portion of less diameter than the lower portion designed to receive a lamp socket and formed with an external circumferential head that provides an internal groove in which fits a head on said lamp socket, said upper portion being divided into a number of fingers by vertical slots, each finger having a laterally projecting lip on its upper end and an external lug or cam below the plane of said lip, and a rotatable ring between the circum lierential bead and said lips with interior surfaces arranged to engage said lugs or cams and press said fingers inwardly when the ring is turned.

2. A shade holder havinga lower portion formed with a folded flange at its end between which folds a lamp shade is adapted to be permanently attached, an integral upper portion of less diameter than the lower portion designed to receive a lamp socket and formed with an external circumferential bead that provides an internal groove in which fits a head on said lamp socket, said upper portion being divided by spaced vertical slots into a number of resilient fingers each finger having an outwardly projecting lip on its upper end and an external lug or cam below the plane of said lip, and a loose rotatable ring between the aforesaid external bead and said. lips having inner and outer walls, and surfaces on said inner wall arranged to engage said lugs or cams on the fingers and press them inwardly when the ring is rotated.

8. A shade holder formed of resilient sheet metal having a folded lower edge for permanently attaching a. lamp shade thereto, the upper portion ot said holder being of less diameter than the lower portion and connected thereto by a bridge through which holes may be made for the escape of heated air, an exterior bead surrounding the reduced upper portion above said bridgewithin which is a groove, said shade holder being divided into a number of upwardly projecting fingers by means of narrow spaced slots extending below said bridge, each finger having an outwardly extending horizontal lip and an exterior lug or cam In testimony whereof I have hereunto set below the lane of said lip, the whole being my hand in presence of two subscribing of integra construction, and a clamping witnesses. 7 ring rotatably mounted on said shade holder CLARENCE W. LUCAS. having faces on its inner surface to engage Witnesses:

said lugs or cams to fasten the shade holder L. W. CLARK, on a lamp socket.

A. A. REIQKER.

Copies of this patent may he obtained for five cents each, by addressing the Commissionerof Patents, Washington, D. G.

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