Electricity: motive power systems – With particular motor-driven load device – Tension-maintaining type of motor-control system
Patent
1981-12-04
1984-01-31
Truhe, J. V.
Electricity: motive power systems
With particular motor-driven load device
Tension-maintaining type of motor-control system
318 7, 242190, 360 55, B65H 5938
Patent
active
044292619
ABSTRACT:
A tape tension sensor is provided to produce an electrical signal indicative of the tension of the running tape of a compact cassette in a tape recorder, and this signal is processed to derive a high frequency component representing the variation in tape velocity. A tape-contactable member is driven by a control signal which is produced on the basis of the high frequency component. In a first embodiment, the tape-contactable member is electromagnetically operated by the control signal so that the member damps or absorbs the vibrations of the tape in the vicinity of the record/reproduce head. A low frequency component may also be derived from the sensor output to produce a second control signal. In the first embodiment, the second control signal is fed to a payoff reel drive motor so that the rotational speed of the payoff reel is controlled to maintain the tension of the tape constant. In a second embodiment, the high frequency component and the low frequency component are added to each other to produce a single control signal which is fed to a motor for driving an upstream capstan of a dual-capstan type tape recorder.
REFERENCES:
patent: 4126817 (1978-11-01), Luzio
patent: 4309728 (1982-01-01), Takizawa et al.
patent: 4341363 (1982-07-01), Inatome
patent: 4361787 (1982-11-01), Negishi et al.
Evans A.
Truhe J. V.
Victor Company of Japan , Limited
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