Tape recorder

Details Tape recorder Tape recorder

1974-02-15

1977-03-29

Schaefer, Robert K.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

318 68, G05B 1106

Patent

active

040151778

ABSTRACT:
A tape recorder has two tape spools independently driven by two reversible electric motors. The tape passing from one spool to the other drives a tachometer wheel which provides a tape speed signal. This signal is compared with a reference value by a differential amplifier which provides control signals for differentially controlling the speeds of the motors to maintain the tape at a constant speed.

REFERENCES:
patent: 3130357 (1964-04-01), Westlake et al.
patent: 3277357 (1966-10-01), Willis
patent: 3358199 (1967-12-01), Jones, Jr.
patent: 3586259 (1971-06-01), Richt
patent: 3600654 (1971-08-01), Yasutake
patent: 3606201 (1971-09-01), Petusky
patent: 3704400 (1972-11-01), Goshima et al.
patent: 3704401 (1972-11-01), Miller
patent: 3715641 (1973-02-01), Mattes
patent: 3716177 (1973-02-01), Leavitt
patent: 3764087 (1973-10-01), Paananen et al.

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