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A telephone magneto is a hand-cranked electrical generator that uses permanent magnets to produce alternating current from a rotating armature. In early telegraphy , magnetos were used to power instruments, while in telephony they were used to generate electrical current to drive electromechanical ringers in telephone sets and activate signals ...
Kellogg company logo as used from the 1920s to the 1950s. The Kellogg Switchboard and Supply Company was an American manufacturer of telecommunication equipment. Anticipating the expiration of the earliest, fundamental Bell System patents, Milo G. Kellogg, an electrical engineer, founded the company in 1897 in Chicago to produce telephone exchange equipment and telephone apparatus.
This phone is fully interoperable with the EE-8, TA-1, TA-43 and TA-312 series of US Field Phones. EE-8 A part of The Marshall Plan (from its enactment, officially the European Recovery Program, ERP) The EE-8* was used in USA from World War II to late seventies, and in Norway from World War II until the TP-6 could replace it.
The Tucker Telephone was invented by A. E. Rollins, [1] the resident physician at the Tucker State Prison Farm, Arkansas, in the 1960s. At the Tucker State Prison Farm, an inmate would be taken to the "hospital room" where he was most likely restrained to an examining table and two wires would be applied to the prisoner.
The 5302 telephone. The model 5302 telephone was a look-alike product to the 500-type telephone that was introduced as a stopgap by Western Electric in 1955 to meet the increasing post-World War II demand for a modernized telephone. It reused existing component supplies from the older model 302 that the model 502 replaced. The 302 had been ...
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In phones connected to common battery exchanges, the ringer box was installed under a desk, or other out of the way place, since it did not need a battery or magneto. Cradle designs were also used at this time, with a handle with the receiver and transmitter attached, separate from the cradle base that housed the magneto crank and other parts.