1975-12-10
1977-09-06
Stephan, Steven L.
Undertaking
G11B 1712
Patent
active
040463850
ABSTRACT:
A record player comprises a motor-driven turntable having an associated general pick-up arm assembly and a control mechanism which includes a main cam serving not only for controlling movement of the pickup arm both during automatic operation of the player and during manual cueing. During a final part of its revolution, the main cam is detached from its positive drive and driven by preloaded spring means, its rotation being damped as by means of a liquid damping arrangement embodying part of the cam or by a frictional damping system in order to provide slow lowering of the pickup arm on to a record surface without the necessity for introducing a separate damping device between the cam and the pick-up arm as has heretofore been the practice.
REFERENCES:
patent: 2902285 (1959-09-01), Knecht
patent: 2906537 (1959-09-01), Dale
patent: 3468547 (1969-09-01), Draper
patent: 3507503 (1970-04-01), Freier
patent: 3827697 (1974-08-01), Miyoshi
patent: 3848875 (1974-11-01), Miyoshi
patent: 3885798 (1975-05-01), Yokokura
Plessey Handel und Investments AG
Stephan Steven L.
LandOfFree
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