Dynamic information storage or retrieval – Dynamic mechanism subsystem – Having power driven transducer assembly
Patent
1987-02-20
1988-08-23
Stephan, Steven L.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Having power driven transducer assembly
369186, 369188, G11B 310, G11B 1708
Patent
active
047665866
ABSTRACT:
A disc-record player comprises a deck plate (1) which carries a rotatable turntable (2) and a pivotable pick-up arm (4). This arm is rigidly connected to a pick-up arm support (24). In the turntable two depressible sensing pins (38,39) are arranged. Further, a control device is provided which comprises inter alia a drive element (20) for controlling the pivotal movement of the pick-up arm (4) and which can be coupled to the pick-up arm support (24). There is also provided a selection element (27) which can be set selectively to two operative positions and which carries first and second positioning projections (29a, 29c). The device also comprises a starting element (17). A positioning element (32) which cooperates with the selection element (27) is provided with two positioning portions (34, 35) against which the sensing pin (38, 39) abuts, after which the selection element (27) is actuated. The positioning portions (34, 35) can be moved up and down and can cooperate with the sensing pin (38,39) in the upper position only, the starting element keeping the positioning portions in the upper position. After the first rotation of the turntable (2) the starting element (17) returns, so that the positioning portions (34, 35) are also returned. The selection element (21) is subsequently reset to an inoperative position in which a third positioning projection (29b) functions as a stop to prevent the pick-up arm (4) from being pivoted out of its rest position. This is achieved by the presence of a control element (22) on the drive element (20) which positions the selection element (27) in the inoperative position after every pivotal movement of the pick-up arm (4) towards the turntable (FIG. 2).
REFERENCES:
patent: 2950921 (1960-08-01), Guest
patent: 3804422 (1974-04-01), Kobashi et al.
patent: 3941392 (1976-03-01), Grosemans et al.
patent: 3966330 (1976-06-01), Ridley
patent: 4701903 (1987-10-01), Einhaus
Stephan Steven L.
Treacy David R.
U.S. Philips Corporation
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