US1226558A - Electric-lamp holder. - Google Patents

Description

V. MARTINEZ ELECTRIC LAMP HOLDER.

APPLICATION FILED APR. 15. 1916.

Patented May 15, 1917.

' INVENTOR. V 117w Maribel BY WW5.

VICTOBINO MARTINEZ, 0F HABANA, CUBA.

ELECTRIC-LAMP HOLDER.

Specification of Letters Patent.

Patented May 15, 1917.

Application filed April 15, 1916. "serial No. 91,469.

To all whom it may concern.

Be it known that I, VICTORINO MARTINEZ, a citizen of the Republic of Cuba, and a resident of Habana, Cuba, have invented certain new and useful Improvements in Electric- Lamp Holders, of which the following is a specification.

The invention relates to receptacles for incandescent electric lamps. The principal object of this invention is to provide an improved construction of s'ucha lamp receptacle which presents a new arrangement of terminals and properly forms a unipolar circuit breaker, whereby the ordinary bipolar circuit breaker provided with a fusible wire in the two electric conductors'is displaced.

Further objects embrace the provision of a. receptacle which is constructed of less metal and more wood, whereby the cost of manufacture is reduced; to arrange the fusible wire without affecting a compact arrangement; and to obviate injury to the cutout element upon securing or removing the lamp.

Further objects will'become apparent by reference to the specification and to the claims defining the scope of the invention.

In the accompanying drawing,

Figure 1 is a front view of a receptacle constructed in accordance with the invention and containing the incandescent lamp.

Fig. 2 is a longitudinal section through the receptacle and a view of the lamp.

Figs. 3 and 4 are opposite views of the terminal-carrying block arranged inside of the receptacle, and

Fig. 5 is a horizontal section of the terminal-carrying block.

The receptacle is composed of a lengthened socket 1 made out of wood or other cheap insulating material, and is reinforced by a metallic ring 1' surrounding the lower extremity of the socket. In the interior of the socket a terminal-carrying block is provided consisting of a solid cylinder 2 of insulating material, such as caoutchouc, porcelain. or any suitable solidified paste. The axial passage 3 extends throughout the length of the cylinder or member 2 and leads to a circular recess 4 at the lower extremity of said block. A metallic pin 5 is received in said passage which is provided at its lower end with a head 6, which forms an inner terminal. The other end of the pin is longitudinally slotted, as at 7, whereby prongs 7 are formed which operate in the manner of a spring and serve to retain the pin in the block 2. The member 2 also has on its periphery two diametrically opposed longitudinal recesses 8 and 9, in the first of which a smaller metallic plate 10 of square shape is arranged and secured by means of a screw 11. In the second recess a late. 12 is secured by a screw 14, which is ormed integral with a spring 13 forming the outer terminal. Both plates 10 and 12 are electrically interconnected by means of a fusible wire 15 disposed in a. helical groove 16 formed on the periphery of the block 2 and extending between the recesses 8 and 9. The ends of the fusible wire 15 are secured under the small plates 10 and 12 by the appertaining screws 11 and 14.

\Vires 17 and 18 from any electric circuit are introduced into the socket 1 through an opening 19 at the upper end thereof. The end of the wire 17 is forced into the slot 7 formed between the two prongs 7 of the pin 5, whilethe end of the other wire 18 is wound around the screw 11 and secured by the same.

The socket is provided at its lower end with interior screw threads 20 to receive the metallic screw threaded base 21 of the incandescent lamp 22. hen the base 21 is screwed into the socket 1 it comes in contact with the spiral spring 13 compressing the same until the central contact 23 of the base 21 engages the inner terminal 6 of the member 2, thus closing the circuit through the filament of the lamp 22 and also maintaining the block 2 in proper position. The block 2 forms a unipolar circuit breaker or cut-out as the fusible wire 15 connects the contact plates 10 and 12, to the former of which the contacting wire, 18 leads. The provision of the member 2 substitutes bipolar circuit breakers orcut-outs ordinarily used in electric lighting circuits.

I am aware that various changes may be made in the construction and arrangement of the parts without departing from the spirit of my invention, and I want to avail myself of all changes and alterations which fairly fall within the scope of my invention, as pointed out in the appended claims.

I claim 1. In combination with an electric lamp socket, a block of insulating material arranged therein, said block being provided with a central passage and with longitudinal recesses at its periphery, contact plates Cir mounted in said peripheral recesses, a fusible Wire interconnecting said contact plates, and a contact pin arranged within said central passage.

2. In combination with an electric lamp socket, a block of insulating material arranged therein, said block being provided with a central passage and with longitudinal recesses at its periphery and interconnected by a helical peripheral groove, contact plates mounted in said peripheral recesses, a fusible wire arranged in said helical groove and interconnecting said contact plates, and a contact pin extending through said central passage.

3. In combination with an electric lamp socket, a cylindrical block of insulating material' arranged therein, said block being provided with a central bore and with longitudinal recesses at its periphery at diametrically opposite points interconnected by a helical peripheral groove, contact plates mounted in said longitudinal recesses, a fusible wire arranged in said helical groove and interconnecting said contact plates, and a pin slotted at its upper extremity extending through said central bore, one of said contact plates being extended and bent to form a spring adapted to contact with the lamp base.

In testimony whereof I aflix my signature hereunto.

VICTORINO MARTINEZ.

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