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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.
Between 1932 and 1935, Stuart Turner produced the small (1/2 HP) type N engine, which had an overhung crank. This model seems to have been superseded by the type R 2-stroke engine, which was introduced in 1934 with a full width crank. The R2 being 84 cc, and the R3 having a larger bore size and hence 123 cc.
3 Things Retirees Should Sell To Build Their Retirement Savings This article originally appeared on GOBankingRates.com : 5 Items From the 1970s That Are Worth a Lot of Money Show comments
Western Electric Co., Inc. was an American electrical engineering and manufacturing company that operated from 1869 to 1996. A subsidiary of the AT&T Corporation for most of its lifespan, Western Electric was the primary manufacturer, supplier, and purchasing agent for all telephone equipment for the Bell System from 1881 until 1984, when the Bell System was dismantled.
The engines were made in 1 hp, 1.5 hp, 2 hp and 2.5 hp versions. It was known as the model D309 or simply the R.A. Lister. The engine was a 4 stroke poppet valve engine, and a simple centrifugal governing system. Preserved Lister Type D 1.5HP 1954 Sectioned Lister D Sectioned Lister D. Throughout the years of production, the engine changed very ...
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These made telephones an available and comfortable communication tool for many purposes, and it gave the impetus for the creation of a new industrial sector. The telephone exchange was an idea of the Hungarian engineer Tivadar Puskás (1844–1893) in 1876, while he was working for Thomas Edison on a telegraph exchange.