Prototype telephone constructed by Alexander Bell

Prototype telephone constructed by Alexander Bell

V410/0002 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 32.1MB

Downloadable file size: 2.2MB

Price image Pricing

Please login to use the price calculator


Caption: Prototype telephone constructed by Alexander Graham Bell in 1875. The device consists of a coil of wire, a magnetic arm and a taut membrane. Any sound causes the membrane, and hence the magnetic arm, to vibrate. The movement of the magnet induces a fluctuating electric current in the coil, & this electrical signal can be reconverted into sound by an identical apparatus at the other end of the circuit. Bell filed a patent on the telephone on 14th February, 1876, but his priority as absolute inventor was questioned by Elisha Gray of Western Electric who similarly filed a patent on the same day. After long litigation, Bell won "the most valuable patent ever issued in the US".

Release details: Model release not required. Property release not required.

Keywords: 19th century communications, alexander's telephone, bell, bell's telephone, communication, communications, historical, history of science, technology, telecommunication, telecommunications, telephone

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.