Pedal assembly in sewing machine with potentiometer control devi

Details Pedal assembly in sewing machine with potentiometer control devi Pedal assembly in sewing machine with potentiometer control devi

1992-01-15

1993-05-04

Wysocki, Jonathan

Electricity: motive power systems

Three-or-more-positions motor controller systems

Knee- or foot-operated controllers

388838, 74512, H02P 700

Patent

active

052085201

ABSTRACT:
In the pedal assembly of a sewing machine drive device, a potentiometer operating member is guided by a mounting stand secured to the pedal stand, to control the slide shaft of a direct acting type potentiometer, and a speed changing pedal including a depressing board to depress the potentiometer operating member with its one end portion is coupled to the pedal stand with the other end portion. When the speed changing pedal is stepped on, a signal is outputted to change the speed of rotation of the sewing machine according the movement of the pedal thus stepped on. The pedal stand may have an opening with which the pedal is swingably engaged. In addition, signal pedals may be arranged in alignment with the speed changing pedal with the same mounting means provided at the position of those pedals, so as to allow the pedals to swap in position with one another.

REFERENCES:
patent: 3648142 (1972-03-01), Corey et al.
patent: 4299182 (1981-11-01), Tanaka
patent: 4310788 (1982-01-01), Hanyu et al.
patent: 4388508 (1983-06-01), Wilson
patent: 4888997 (1989-12-01), Eckert et al.
patent: 4965417 (1990-10-01), Massie
patent: 5067368 (1991-11-01), Itakura et al.

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