Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1985-04-18
1987-03-24
Weldon, Ulysses
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318310, 318327, G05B 500
Patent
active
046527990
ABSTRACT:
A driving apparatus for a recording medium includes a motor for driving a recording medium, a preset counter for counting either of a reference clock signal and a signal provided by multiplying a reproduced synchronizing signal, the preset counter being reset in response to a synchronizing signal in a reproduced signal when the reference clock signal is counted and being reset in response to a reference synchronizing signal when the signal which is provided by multiplying the reproduced synchronizing signal is counted, and a circuit for producing an analog electrical signal corresponding to a time interval during from a time when a count value of the preset counter reaches its preset value to a reset time of the preset counter, wherein the motor is so controlled by the analog electrical signal that the moving speed of the recording medium relative to a pickup is made constant.
REFERENCES:
patent: 3386021 (1968-05-01), Fischer
patent: 3843914 (1974-10-01), Carlson et al.
patent: 3950682 (1976-04-01), Dohanich
patent: 4061950 (1977-12-01), Kayanuma
patent: 4236050 (1980-11-01), Winslow et al.
patent: 4386300 (1983-05-01), Ogawa
patent: 4485337 (1984-11-01), Sandusky
Eslinger Lewis H.
Sinderbrand Alvin
Sony Corporation
Weldon Ulysses
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