US1906234A - Electric lamp - Google Patents

Description

G. LEIVA ELECTRIC LAMP May 2, 1933.

Filed June '11, 1928 i: f 4 l n l1/mio@ Gasjaar Leiva,

btomm Patented May 2, 1933 PATENT OFFICE GASPAR LEIVA, OF BUENOS AIRES, ARGENTINA ELECTRIC LAMP Application led June 11, 1928, Serial No. 284,484, and in Argentina May 9, 1928.

The present invention relates to improvements in electric lamps and has essentially for its object to provide a new lamp which is of simple construction, economical in its use and which offers considerable advantage over those proposed and used heretofore, being adapted for use in connection with either direct or alternating current.

The invention also contemplates other ob- 1 jects which Will be apparent from the following specification, and which will be pointed out particularly in the appended claims. In order that the present invention may be clearly understood and readily carried into practice it has been illustrated by way of eX- ample in the accompanying drawing which shows a lamp constructed in accordance with the present invention, in vertical central section.

In this embodiment, l is the positive and 2 s the negative pole of the lamp-socket, which poles are pressed on the porcelain or other insulating plate 5 by means of screws. At the upper portion of the lamp socket there is a tubular, internally threaded extension by means of which the lamp-socket 6 may be secured to any iron pipe or the like imbedded in the ceiling or wall, with or without the assistance aorded by the screw 3 provided with a head of insulating material. The said lamp-socket 6 is made of a currentconducting material and externally provided with a cover or outer shell of insulating material 7. The lamp itself surrounds the usual filament one end of which, 9, is welded to the conducting portion of the lamp-socket and acts as the ground pole, while the other end passes through a block of cast insulating material or insulating base 8 which closes the cap adhering simultaneously to the lower mouth of the lamp-socket. This end terminates in a spring 13 preferably provided with a ball of iron or similar material and which makes contact with the positive pole of the line.

The two halves of the lamp-socket 6 are threaded one to another, the upper portion being provided with a metallic threaded eX- tension 12, as in the case of ordinary lamp'- sockets, which is connected to the negative pole 2. A screw l1 provided with an insulating head passes through the lower portion of the lamp-socket and may be placed, or not, in connection with the said threaded portion, in order to thus cut off the current from the negative pole 2.

As may be seen from the foregoing the lamp according to the invention operates at will with one single pole, that is, the positive pole, and the other pole to ground or, alternately, with the two poles, negative and positive.

Evidently, dilferent constructional or detail modifications may be made without departing from the scope of the present invention which is clearly defined in the appended claims.

Having thus particularly described and ascertained the nature of my said invention and the manner in which the same is to be carried into practice, what I claim and desire to protect by Letters Patent, is

' l. An electric incandescent lamp, comprising a filament an insulating base having one end of the filament passing therethrough; a yielding contact in the base connected to the lilament therein; and a socket surrounding said base and to which the other end of the iilament is secured.

2. An electric incandescent lamp, comprising a filament; an insulating base having one end of the filament passing therethrough; a yielding contact in the base connected to the filament therein; a socket surrounding said base and to which the other end of the filament is secured; and an insulating cover for the base and socket.

3. An electric incandescent lamp, comprising a filament; an insulating base having one end of the filament passing therethrough; a yielding contact in the base connected to the filament therein; a socket surrounding said base and to which the other end of the filament is secured; a tubular metallic extension secured on the base; and adjustable means for electrically connecting the extension with the socket.

In testimony whereof I aflix my signature.

GASPAR LEIVA.

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