Switching device in a magnetic-tape apparatus of the auto-revers

Winding – tensioning – or guiding – Reeling device – Fishing rod reel

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Details

242206, 242208, 360 742, 360 964, G11B 1544, G11B 1528

Patent

active

049326058

ABSTRACT:
The invention relates to a switching device in a magnetic-tape apparatus of the auto-reverse type, comprising a pivotal drive mechanism which is pivotable between two turntables to drive a first turntable in a first position and a second turntable in a second position. The pivotal drive mechanism, when it is pivoted between its first position and its second position in the case of a reversal of the direction of tape transport, actuates a change-over device for a pair of pressure rollers. The changeover device by means of a slide lifts a first or a second pressure roller journalled on a lever off an associated capstan against spring force. The pressure roller levers are pivoted about a pivotal axis by the pivotal drive mechanism and the slide via a first and a second cam lever respectively. The cam levers comprise cam surfaces which are followed by the pressure-roller levers. When the pivotal drive mechanism approaches the first or the second turntable, one of the cam levers is pivoted further via a pressure portion of the cam surface by the spring force acting on the associated pressure-roller lever, in such a way that the slide is urged into an end position by the pressure-roller lever. In the end position the pivotal drive mechanism is disengaged from the change-over device.

REFERENCES:
patent: 4434442 (1984-02-01), Kommoss et al.
patent: 4736905 (1988-04-01), Kido

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