US1486645A - Socket for electric lamps or fuses - Google Patents

Description

March 11 1924. R. EBERHARDT SOCKET FOR ELECTRIC LAMPS OR FUSES Filed March so. 1923 amuwwtoz Patented Mar. 11, 1924.

ROBERT EBEBHAEDT, OF NEW YORK, N. Y., ASSIGNOB F ONE-FOURTH '10 EMIL '1'. PESKAR, OF NEW YORK, N. Y.

SOCKET FOR ELECTRIC LAMPS OR FUSES.

Application filed March 30, 1923. Serial No. 628,795.

To all whom it may concern:

Be it known that 1, ROBERT EBERHARDT, a citizen of Hungary, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Sockets for Electric Lamps or Fuses, of which the followingis a specification.

This invention relates generally to electric incandescent lamps, having more particular reference to the construction of the member in the socket element which directly supports the lampbulb, the invention being also adapted for use in connection with fuse sockets.

The invention has for an object the provision of a novel and simple means whereby the bulb can be more quickly attached to the threaded sleeve constituting the said member.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawings is a side view of an electric incandescent lamp having the invention applied to its socket member.

Fig. 2 is a rear elevational view of the contact sleeve. I y

Fig. 3 is a front elevational view thereof.

Fig. 4c is a transverse sectional view taken on the line H of Fig. 5.

Fig. 5 is a fragmentary longitudinal sectional view taken on the line 5-5 of Fig. 4.

Fig. 6 is an enlarged fragmentary side view showing a portion of the socket member.

Fig. 7 is a fragmentary longitudinal sectional view showing a modification.

Fig. 8 is a transverse sectional view taken on the line 88 of Fig. 7.

In the drawing the reference numeral 10 indicates the shell of the socket member of the lamp, the usual bulb being indicated at 11 and the switch button at 12. The shell 10 is provided with the usual insulating lining 13. According to my invention I make the sleeve which grips the bulb end,

' of an expansible construction, whereby the bulb end can be readily inserted therein.

As here shown this sleeve is diametrically divided into two halves or sections 15 and 16 respectively which are formed with screw threads complementary to one another. These sections are formed with hinge ears 18 and 19 adjacent their inner ends which engage freely a hinge pintle 20 fixed in the usual porcelain block 21 which supports the switch mechanism of the lamp. The upper end of this pintle connects to one of the lamp terminals as indicated at 20'. The pintle 20 extends longitudinally outward between the two halves of the sleeve, for a distance beyond the hinge ears on the latter. Around this projecting portion oi the pintle is coiled a spring 23 which engages at opposite ends the respective sleeve halves and tends to urge them together. On the outer end of the pintle is a nut 24:, or other shouldered member, which is adapted to bear on the spring 23 as will be presently set forth.

Projecting in a generally radial direction from the opposite edges of these sleeve sections 15 and 16 are the tongues 26 and 27 respectively, which project into oblique grooves 28 formed in the wall of the shell and lining, these grooves inclining toward one another as shown in Fig. 6. These tongues are covered with insulation as shown at 29.

Projecting rigidly radially outward from a collar 30 freely surrounding the pintle 20 is an insulating stud 32 which passes through a longitudinal slot 33 cut through the said lining and the shell. I also connect a tension spring 4.0 to the free edges of the sleeve halves, this spring being attached midway between its ends to a stud 41 on the block 21.

As will be apparent, by grasping the element 32 and pulling longitudinally with respect to the socket member thereon, the sleeve 15, 16 is moved in the shell. Since the tongues 26 during this movement travel along the oblique slots 28 they move away from one another and cause the sleeve to expand so that the bulb end can be readily inserted therein. Upon the movement of the parts to their former position the sleeve will grip the bulb end and hold the latter in place. The spring 23 as will be understood, acts to press the sleeve, and with it the bulb end, inwardly so as to ensure of proper engagement of the centre contact of the bulb with the corresponding one, indicated at 60, of the socket.

While I have illustrated and described a preferred embodiment of my invention it is to be understood that I do not limit myself to the precise construction herein set forth and that various changes and modifications might be made therein without'departing from the spirit and scope of the invention as defined in the appended claims.

My improved device may also be used as a fuse socket if desired.

The modified construction shown in Figs. 7 and 8 difiers only in the means for moving the collar 30. As here shown the latter is formed at its inner end with a laterally projected fiat finger 50 which projects in front of a cam faced disk, or cam, 51 mounted on a spindle 52 fixed in the porcelain block 21. Formed coaxially on the .cam 51 is a gear 53 engaged on opposite sides by rackbars 54 slid-ably held in guide elements 55 in the shell 10, the ends of these rack-bars projecting from the shell and having push button heads 56 thereon. Engaged at 0pposite ends with the spindle and cam is a spring 57 which returns the cam to normal position. As will be apparent, by pushing the rack-bars 54 inwardly the cam 51 is rotated and moves the finger 50, and collar 30, and in consequence the sleeve 15, 16 outward.

Having thus described my invention what I claim as new and desire to protect by Letters Patent of the United States is as follows:

1. In an electric lamp socket, an expansible bulb holding member, said bulb holding member being in the form of a sleeve formed in two semicylindrical sections, said sections being hinged to swing on a common axis, and a spring urging said sections to ward one another, and means accessible from the exterior of the socket for swinging said sections away from one another.

2. In an electric lamp, a shell, a bulb holding member therein formed of two semi-cylindrical halves hinged on a common pintle, a springarranged to engage the said halves and urge them both toward one an other and longitudinally inward in the socket member, tongues on the free sides of said halves engaging in oblique slots in the wall of the socket member and means accessible from the exterior of the socket member for moving said halves longitudinally in the said socket member to expand the said halves from one another. V

3. In an electric lamp, a shell, a bulb holding member therein" formed of two semi-cylindrical halves hinged on a common pintle, a spring arranged to engage the said halves and urge them both toward one another and longitudinally inward in the socket member, tongues on the free sides of said halves eng'agingin oblique slots in the wall of the socket member and means accessible from the exterior of the socket member for moving said halves longitudinally in the said socket member to expand the said halves from one another, said means including an arm freely surrounding the said pintle.

4. In an electric lamp socket, an expansible bulb holding member, said bulb holding member being in the form of a sleeve formed in two semi-cylindrical sections, said sections being hinged to swing on a common axis, and a spring urging said sections toward one'another, and means accessible from the exterior of the socket for swinging said sectionsaway from one another, said means. comprising a collar, a cam engaging said collar, and a rack-bar for rotating'said cam.

In testimony whereof I have afiixed my signature.

' ROBERT EBERHARDT.

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