Tachometric device driven by an electric motor

Details Tachometric device driven by an electric motor Tachometric device driven by an electric motor

1987-09-25

1989-04-04

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With stabilizing features

73519, 324163, 324167, G01P 3487

Patent

active

048189260

ABSTRACT:
A tachometric device is provided with a D.C. electric motor a shaft of which drives a pair of permanent magnets to rotate. A first permanent magnet controls a speed indicator unit; a second permanent magnet is rotatably mounted within a winding the terminals of which are connected to a negative feed back circuit for controlling the speed of the motor.

REFERENCES:
patent: 3739211 (1973-06-01), Hasler
patent: 4241607 (1980-12-01), Maggia
patent: 4371834 (1983-02-01), Bezard et al.
patent: 4376308 (1983-03-01), McNair
patent: 4435677 (1984-03-01), Thomas
patent: 4572999 (1986-02-01), Coulon

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