Phonograph

Details Phonograph Phonograph

1975-05-16

1978-11-07

Stephan, Steven L.

Undertaking

G11B 310

Patent

active

041242165

ABSTRACT:
A detecting arrangement for a phonograph for non-mechanically detecting a tone arm reaching the outlet groove of a record. The detecting arrangement includes a first detector in the form of an elongated member movable in accordance with the movement of the tone arm and a second detector responsive to at least an increased movement of the member for generating pulse signals above a predetermined level to a detector unit which controls an operation of the phonograph.

REFERENCES:
patent: 2056372 (1936-10-01), Schwartz
patent: 3276315 (1966-10-01), Chalfin
patent: 3533703 (1970-10-01), Wingate
patent: 3540739 (1970-11-01), Nakajima et al.
patent: 3572724 (1971-03-01), Rabinow
patent: 3676681 (1972-07-01), Kobayashi
patent: 3701534 (1972-10-01), Laue
patent: 3856401 (1974-12-01), Heitmann et al.

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