US1086643A - Electric-light socket. - Google Patents

Description

W. BREIDENBAOH.

ELECTRIC LIGHT SOCKET. APPLICATION FILED NOV. 17, 1913.

1,086,648. Patented Feb. 10,l914.

IINITED SATS ELECTRIC-LIGHT SOCKET.

To all whom it may concern Be it known that I, IVIIJJAM BREIDEN- BACH, a citizen of the United States, resid ing at Indianapolis, in the county of Marion, State of Indiana, have invented certain new and useful Improvements in Electric-Light Sockets; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in electric light sockets.

The principal object of the invention is to provide a socket of the screw type into which an electric lamp may be screwed and locked in such position against removal.

Other objects and advantages will be apparent from the following description, when taken in connection with the accompanying drawings.

In the drawings: Figure 1 is an elevation of an electric light socket made in accordance with my invention. Fig. 2 is a vertical longitudinal sectional view therethrough. Fig. 3 is an end view of the socket, the lamp being removed. Fig. 4c is a vertical section on the line a a of Fig. 2. Fig- 5 is an enlarged detail view of one of the locking elements. Fig. 6 is a horizontal sectional view on the line 66 of Fig. 2.

Referring particularly to the accompanying drawings, 10 represents the usual porcelain base. Secured to the outer end of the base is a ring 11, which is provided at its upper edge with the inwardly directed peripheral flange 12, and on its lower edge the inwardly extending perforated attaching lugs 11. A threaded lamp receiving tube 13 is disposed within the ring and has on its inner end the peripheral flange 13 which is rotatable between the flange 12 and the lugs 11. Inwardly extending fingers 14 are carried by the inner end of the tube 13, and are adapted to move in close proximity to the outer end of the base. Secured to the porcelain base and extending inwardly toward the center thereof is the center contact spring 15 which is provided at its inner end with a contact pin or point 16, this being arranged for contact wit-h the central brass plate in the end of the threaded stem 17 of the lamp 18. Mounted in the base is the usual snap switch which includes the spring-pressed plunger 19, the switch Specification of Letters Patent.

Application filed November 17, 1913.

Patented Feb. 16,1914.

Serial No. 801,537.

key 20 and the cam block 21 mounted therein and disposed in engagement with the spring plunger. At the other side of the base is mounted a metal plate 22 which is provided with the vertical parallel arms 23, and between which is vertically guided a transverse head 26, said head carrying a vertical pin 25 passing through an opening 24: formed in the base. Encircling the pin, and engaging with its opposite ends respectively with the end of the socket in the base 23 and with the transverse head so that the pin is normally held in lowered position is a coil spring 26. J ournaled in the lower portion of the casing is a transverse shaft 27 on which is mounted a cam block 28, this block being disposed between the arms 23 and below the head 26. The shaft extends through an opening 29 in one side of the metal sleeve 30 of the socket and is provided with an angular end which is adapted to be received in a correspondingly shaped socket in the end of a key 32.

In the normal position of the block 28, the long side is in engagement with the cross head 26, the spring holding the pin in lowered position so that the outer end thereof is out of the path of the fingers 14. In this position, the lamp and threaded sleeve or tube will be free to rotate together, thus preventing the unscrewing and removal of the lamp. To permit the removal of the lamp, the key is engaged with the shaft 27 and turned so that the outer end of the pin 25 will be forced beyond the outer end of the base and into the path of the fingers 1 In the act of unscrewing the lamp the sleeve will rotate until one of the fingers engages with the pin 25, thus holding the sleeve, and permitting the lamp to be unscrewed clear out of the sleeve.

What is claimed is:

In an electric light socket, an insulated base having an opening, a rotatable threaded sleeve arranged to receive the threaded stem of a lamp, a guide member including parallel arms mounted in the base, said threaded sleeve having inwardly projecting fingers at the inner end thereof, and an inwardly directed flange on the outer end, a ring secured to the base and having an inwardly directed circular flange embracing the flange of the threaded sleeve, a pin disposed through the opening of the base, a transverse head carried by the inner end of the pin and slidably disposed between the said head to force the pin into the path of 10 arms of the said guide a spring carried by the fingers of the said threaded sleeve to the pin disposed between the said head and prevent rotation of the same.

the end of the base, a shaft transversely In testimony whereof, I afliX my signamounted in the inner ends of the arms, one ture, in presence of two Witnesses.

end of the said shaft being formed for 00- \VILLIAM BREIDENBACH. operation with a he and a cam block car- Witnesses:

i'ied by the shaft and located between the PHILIP G. WESLEY,

arms in position for engagement with the FRED. HEIER.

fiopies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatente, Washington, D 0.

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