Motor system for sewing machine

Details Motor system for sewing machine Motor system for sewing machine

2006-03-07

2006-03-07

Calvert, John J. (Department: 3765)

Sewing

Elements

Starting or stopping

Reexamination Certificate

active

07007618

ABSTRACT:
A motor system for a sewing machine includes a motor unit rotatable at a first rotation speed; a clutch unit with an output shaft capable of being coupled to or separated from the motor unit; a speed changing unit for switching the first rotation speed to a second rotation speed; a position control unit with a sliding disk being movable to a first position, a second position or a third position, making the sliding disk rotate at the second or first rotation speed or stopped; an auxiliary driving shaft for transmitting the rotation of the sliding disk to the output shaft; a first sensor for detecting the position of the clutch unit; and a second sensor for detecting the position of a sewing mechanism of the sewing machine. Thereby, a first speed control, a second speed control and a stopping position control can be achieved for the sewing mechanism.

REFERENCES:
patent: 4259915 (1981-04-01), Szostak
patent: 5189968 (1993-03-01), Eichenseer
patent: 5481165 (1996-01-01), Urano et al.
patent: 5522330 (1996-06-01), Nishi et al.
patent: 6363872 (2002-04-01), Heckner

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