Two-way operation system control device for sewing machines

Details Two-way operation system control device for sewing machines Two-way operation system control device for sewing machines

1979-07-19

1981-11-10

Nerbun, Peter P.

Sewing

Elements

Starting or stopping

318305, 318551, D05B 6918

Patent

active

042991820

ABSTRACT:
A speed control device for a sewing machine having a drive motor, includes a foot controller with a variable resister and a depressable operating plate; depending upon the extent to which the plate is depressed the variable resister provides a variable resistance value for the motor. The controller also has manually operable push buttons each sewing to selectively connect one of several different fixed-value resistors in circuit with the drive motor. A changeover switch connects the variable resistor into the motor circuit when the plate is depressed and disconnects the variable resister from the circuit while connecting the fixed resistors into the circuit, when the plate is not depressed.

REFERENCES:
patent: 4078506 (1978-03-01), Sasaki
patent: 4098206 (1978-07-01), Suchsland et al.

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