Universal motor speed signal converter

Details Universal motor speed signal converter Universal motor speed signal converter

1992-05-06

1993-08-03

Ro, Bentsu

Electricity: motive power systems

Three-or-more-positions motor controller systems

Knee- or foot-operated controllers

1122174, 112275, D05B 6918

Patent

active

052332780

ABSTRACT:
Circuitry is provided capable of converting input motor speed control signals from one of two sewing machine motor speed switches into output signals adapted to control the speed of a particular type motor used to drive a sewing machine. Values are preset by the user to identify the motor and coordinate the signal conversion accordingly.

REFERENCES:
patent: 3969661 (1976-07-01), Morinaga et al.
patent: 4310788 (1982-01-01), Hanyu et al.
patent: 4332208 (1982-06-01), Watasue et al.
patent: 4386301 (1983-05-01), Neki et al.
patent: 4976552 (1990-12-01), Ishikawa et al.

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