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Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Kemeny, E. S.
Attorney: Eslinger; Lewis H., Sinderbrand; Alvin

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Title: Power supply switching circuit for combined audio system

Abstract: In a combined audio system including main audio apparatus, auxiliary audio apparatus comprising at least one of a phonograph record player and a magnetic recorder and/or reproducer having automatic shut-off mechanisms, a power supply switching circuit is disclosed comprising a main switch and a plurality of auxiliary switches for applying power to the main audio apparatus and the auxiliary audio apparatus. The auxiliary switches are controlled by the automatic shut-off mechanism to de-energize the auxiliary audio apparatus and, additionally, selectively supply power therethrough to the main audio apparatus whereby the main audio apparatus is de-energized when the auxiliary audio apparatus is de-energized.

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Inventors: Saito, Takahiko (Kamakura, JA)
Iwase, Koichi (Chofu, JA)
Shimada, Shojiro (Tokyo, JA)

Application Number: 505623
Filing Date: 1974-09-13
Publication_date: 1976-02-10
Assignee: Sony Corporation (Tokyo, JA)
Primary Class(es): 369/1
Other Classes:
US Patent Ref:
Other Refs: Other References: admiral Co., Console Model Y17015, Manual in Sams Set 986, (1968).
Gen. Elec. Co., Console Chassis T7C, Manual in Sams Set 987 (1968).
Vissers, W., "H. F. Switching," Radio & TV News, May 1955.