US 2145787 A
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Description (OCR text may contain errors)
Jan. 31, 1939. F. c. DE REAMER LAMP SOCKET Filed March 5, 1957 Inventor-1 Fran-1K C.DeF?eameT,
by H 4 i Attorney.
Patented Jan. 31, 1939 LAMP sooner l Frank C. De Reamer, Bridgeport, Conn., assignor to General Electric Company, a corporation of New York Application March 3,
The present invention relates to lamp sockets or holders and especially to lamp sockets or holders for long cylindrical lamps having a contact ferrule at each end.
The object of my invention is to provide an improved socket or holder for a lamp of this type whereby the lamp can be connected into two spaced plug receptacles or to other plug contact receiving means adapted to receive contact prongs at spaced intervals.
The invention is well adapted for connecting a lamp of this type to a type of wall receptacle comprising continuous contact strips arranged to receive contact prongs at spacednntervals.
For a consideration of what I believe to be novel and my invention, attention is directed to the following specification and the claims appended thereto.
In the drawing, Fig. 1 is aperspective view showing a strip type wall receptacle having a long cylindrical lamp connected thereto through sockets embodying my invention; Fig. 2 is a perspective exploded view showing the end of the lamp and a lamp socket partially taken apart; Fig. 3 is an exploded view of the parts which go to make up a lamp socket, and Figs. 4 and 5 are views of a modification.
Referring to the drawing, I indicates a strip type wall receptacle. It comprises a continuous metal strip bent to provide walls forming two channels 2 and 3 which are lined with insulation 4 and in which are located continuous metal contacts 5 and 6 which are formedeach from a flat strip bent double on itself. The open sides of the channels are closed by a suitable cover plate 1 of insulating material in which there are provided at spaced -intervalsopenings 8 to receive the contact prongs of a plug receptacle. The pairs of openings 8 are spaced apart longitudinally a distance to receive contact prongs located at the two ends of the lamp. In Fig. 1, 9 indicates a long cylindrical lamp and Ill indicates sockets, one at each end of the lamp, each socket having prongs to engage with the contact strips 5 and 5.
Referring to Figs. 2 and 3, the socket onpon tact comprises a disk ll'ofinsulating material having a recess i2 in one face and a base or base extension I 3 which is flat on its lower side M so that, it is adapted to engage a flat surface. Located in recess I2 is a metal disk l5 having spring teeth l6 projecting from its periphery, which wedge against the side wall of recess 12 in notches l I to hold the disk in position in the recess. At its central portion, the disk is pro- I937, Serial No. 128,803 (Cl. 173-328) vided with outwardly projecting spring fingers I8 which form a spring head adapted to engage in the recess I! in the metal ferrule 20 at the end of the lamp 9. When the spring fingers l8 enter the recess is, they make firm electrical contact therewith and serve to hold thesocket on the end of thelamp. Base I4 is provided with a groove 2| which communicates with recess I2 and with a groove 22. Groove 2| is relatively wide at its inner end and tapers down to a narrow'slot 2| at its outer end. Contact disk i5 is provided with a flat integral extension 23 which fits snugly in the wide portion of groove 2|. Rivetedto extension 23 is a contact prong 24. Two prongs 24 which are alike are provided. Each has a body portion 25, a projecting upright portion 26 and a lug 21. In the case of the one prong, lug 2'! passes through a hole in extension 23 and is firmly riveted to the extension. The body por-' tion 25 of this prong fits edgewise in passage 2| extending through the narrow slot 2| of the passage, as shown best in Fig. 2, the sides'of slot 2| serving to support the prong in edgewise position. In the lower wall of the passage is a recess 28 which serves to accommodate the head on the rear side of extension 23 which is produced by riveting over the end of lug 21. The other prong fits edgewise in groove 22, the groove being provided with a recess 29 to accommodate lug 21. This serves to hold the prong in position in groove 22 against longitudinal movements. The prong in groove 22 is without electrical connection, it being a dummy prong, so tospeak, and
serving only as a supporting meansfor the lamp. Base I3 is recessed as is indicated at 30 to receive a cover plate 3| fastened in place by drive screws 32. When the cover plate is in position,
the two contact prongs are held firmly in place.
In the use of the invention, sockets are placed one on each end of the lamp and since the sockets face in opposite directions, the live contact at one end is at one side of the lamp and the live contact at the other end is at the other side of the lamp. With the sockets in place on the end of the lamp, the lamp can be connected to two spaced receptacles properly connected togather electrically or to a receptacle of the continuous contact strip type as shown in the drawing by merely inserting the prongs into the usual receptacle openings.
In Figs. 4 and 5 is shown a modification wherein the cover plate 33 corresponding to cover plate ll of Figs. 2 and 3 is provided with a cylindrical extension 34 which fits around the disk 3! correspondingtothediskll ofl'lu2and3and serves to house the same so as.to protect the metal contacts located in the recess of the disk. Otherwise, the construction shown in Figs. 4 and 5 is the same as that shown in Figs. 2 and 3. In this connection, Fig. 4 illustrates the manner in which the projecting spring fingers l8 the metal contact i engage in the recess I! of the metal ferrule 20 at the end of the lamp, and as to these parts, reference numerals corresponding to thoseused in Figs. 2 and 3 have been applied to the corresponding parts of the structure shown in Figs. 4 and 5. T
By my invention, I provide a lamp socket for a lamp of this type which is simple in structure, emcient in use and capable of being manufactured at low cost. At the same time, it gives a I pleasing appearance when used with a lamp of this type.
By providing on each socket, in addition to the live prong, a second prong not electrically connected and which serves as a supporting means.
.a construction results wherein when the lamp is plugged in, it is held firmly in place mechani-' cally, the load being divided between the two prongs at the respective ends of the lamp.
What I claim as new and desire to secure by Letters Patent of the United States, is:
1. A socket for a lamp having contacts at its" ends comprising a disk having arecess in one contact openings of a plug receptacle, one of.
said prongs being connected to said contact memher, the other being not electrically connected and serving only as a supporting member, and a cover plate on the extension for holding the prongs in position.
2. A socket for a lamp having contacts at its ends comprising a disk having a recess in one face and an extension having spaced passages, a contact member in said disk recess for connection to the contact at the end-of a lamp, prongs in said spaced passages projecting beyond the contour of the extension, one of which is connected to said contact member, the other being not electrically connected and serving only as a supporting member, and a. cover plate on said extension for holding the prongs in position, said cover plate having a cylindrical housing for enclosing said disk.
FRANK C. DE REAMER.