Phase indication device of sewing machine

Details Phase indication device of sewing machine Phase indication device of sewing machine

1982-04-28

1984-03-27

Schroeder, Werner H.

Sewing

Elements

Starting or stopping

112271, 11212111, D05B 6922

Patent

active

044387180

ABSTRACT:
A phase indication device of the invention is provided for a sewing machine for electrically indicating a predetermined angular position of a main drive shaft and showing that the sewing machine is ready for starting a stitching operation. The phase indication device comprises first and second detection means, electric circuit and an electric indicator. The first detection means produces a first electric signal when detecting the predetermined angular position of the main drive shaft. The second detection means produces a second electric signal when detecting the drive motor being deenergized. The electric circuit is operative to produce an output to lighten the electric indicator when the circuit receives both of the first and second electric signals.

REFERENCES:
patent: 3972297 (1976-08-01), Melcharick
patent: 4013933 (1977-03-01), Dohi et al.
patent: 4233919 (1980-11-01), Takahashi et al.
patent: 4254724 (1981-03-01), Conrads

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