US987357A - Electric-light switch fot telephone-booths. - Google Patents

Description

s. M 0. GRANT. ELEUTRIG LIGHT SWITCH FOR TELEPHONE BOOI'HS.

APPLIGATLON FILED MAIS, 1910.

Patented Mar. 21, 1911.

INVENTQR 5 6 1 WITNESSES UNITED STATE S PLENT- OFFICE.

SAMUEL M. 0. GRANT, OF PITTSBUBG, PENNSYLVANIA.

tion aims to arrange a candescent lamp in a telephone booth or upon the telephone, whereby when the booth or telephone are being used alight can be maintained that will facilitate the user of the booth or telephone in examining the telephone directory and transcribing any messages received over the telephone.

i The primary object'of my invention is to i provide a device of'tlie above type that can be either operated when the telephone directory is being used or when the telephone being used, the device including two circuits that can be independently used oclamp and a ca-sion may require.

To attain the above object, I have devised a novel switch which is compact, simple in construction, and inexpensive tomanu'fiacture, the switch'being located upon the telephone to be automatically actuated the telephone directory or the telephone receiver are brou ht into use. .Inconnection with the switch there is an incandescent suitable source of electrical energy, the lamp being of sufficient candle power to insure a light in proximity to the telephone, whether the same located in a booth, dark alcove, or room.

My invention, will be better understood after being specifically described, and rotoronce will now be had to-the drawing forming part of this specification, wherein there is illustrated-a preferred embodnnent of the invention, but it is to be understood that-the structural elements thereof can be varied or changed, as to the size, shapeand manner of assemblage without departing from the scope of the inventiom M V In the drawings: Figure 1 1s a front elevation of a telephone provided with the li hting device. Fig. :2 is a side elevation. o the same. Fig. 3 is an enlarged vertical sectional view of the switch showing the Specification of Letters Patent.

M. O. Guiana;

when

ELECTRIC-LIGHT SW'ITGH FOR TELEPHONE-ROUTES.

same in an Open position. Fig. 4 is a similar view showing the directory switch rod 111 a closed positlon and the receiver switch rod in an open position, and Fig. 5 is a similar vlew showing the directory switch rod in an open position and the receiver switch rod in a closed position. x

In the accompanying drawings the ret erence numeral 1 denotes the baclcboard of a wall telephone, the lower end of the board being enlarged to support a battery box 2 containing battery cells oranoth'er source ul' electrical energy.

at denotes a call 1m" mounted upon the-up per part of the board 1, this box having Patented Mar.21, 1911. 7 Application filed May 5, 1910. Serial No. 559,437.

interalia-collapsible bells 5 and a spring actuated receiver arm 6 adapted to support 'a receiver 7, which is connected by a wire 8 to the binding post 9,015 the call box 4.

lO-denotes a switch block made of an insulating material, as fiber and this block is suitably'secured to the sidevof the box t ed jacent to the upper end thereof and directly above the receiver arm 6, preferably by screws 11. Inthe upper end ot the block 10 are arranged contact pieces l2 having thelower edges thereof provided with. sock ets 18. In communication with these sockets are vertical openings 14 and 1.5 and extending into said openings are a directory switch rod 16 anda receiver switch rod 1'3, said rods having the upperends thereof tapered to positively engage in the sockets 13. Err tending through the'metalliccontact pieces 12 is a metallic tube 18, the ends of said tube terminating at the vertical edges of the block 10, whereby a metallic plug 19 can be in serted in'either end of said tube.

-20 denotes an incandescent lamp mounted upon the front sideof the box 4 and-this lamp is connected by awire 21 to the plug 19 and by a wire 22'to one of the cells 3 within the battery box 2. ,The cells are connected inseries and one of said cells is con nectcd by a wire havingbranches 2% and 25 suitably connected to the rods 16 and 17 respectively.

' 26 denotes abifurcated head carried by the lower end' of the rod 17 and embracing the receiver'arm 6.

27 denotes a head carried by the lower end of therod l6 and adapted to rest upon a bracket 28 secured to the side of the battery box 4.. Attached to the upper end oi, the-head SZTis aresilient arm or curved spring 29 having the opposite end, thereof connected to the side of the battery box 2, as

' is released and the switch rod 16 is immediately elevated, com leting an electrical circuit which is as-fo lows: from the battery by the wire 22 to the lamp20, by the wire 21 to the plug 19, by the tube 18 and the contact piece 12 to the rod 16, by the branch 24 of the wire 23 to the battery, thus completing a circuit through the lamp which furnishes suflicient light in the vicinity of the telephone.

Should the receiver 7 be removed from the arm 6, the arm immediately raises the rod 17 in the switch block 10 and an electrical circuit is completed, which is as follows: from the battery 2 by the Wire 22 to the lamp 20, by the wire 21 to the plug 19, by the tube 18 and contact piece 12 to the rod 17, by the branch 25 of the wire 23 to the battery, thus completing another circuit through the lamp 20.

From the foregoing it will be observed lhat I ha vc devised a novel switch for controlling the operation of an electric lamp and it i s in connection with this lamp that i through 'said contact pieces, a contact plug seated in said 'nietallic tube and connected with a source of electrical energy thereby connecting said contact pieces to said source, and a pair of spring controlled rods slidably mounted in said support and connected with the source of electrical energyand adapted -to engage 1n the sockets of said contact pieces thereby completing the circuit.

In testimony whereof I afiix my signature in the presence of two witnesses.

SAMUEL 0. GRANT. iVitnesses KARL H. BUTLER, MAX H. Snonovrrz,

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