Position indicating unit for sewing machines

Details Position indicating unit for sewing machines Position indicating unit for sewing machines

1978-01-13

1981-05-26

Schroeder, Werner H.

Sewing

Elements

Starting or stopping

318653, D05B 6922

Patent

active

042691320

ABSTRACT:
A position indicating unit of sewing machines, and more particularly a position indicator installed in sewing machines, having a magnet, pole plates, Hall effect ICs, amplifying actuating circuits and a visual signaling device to indicate and monitor the operation of automatic needle position control system, and to cause a conventional needle braking mechanism or the like to stop the sewing machine at a given position.

REFERENCES:
patent: 3176641 (1965-04-01), Palmer
patent: 3465327 (1969-09-01), Schroter et al.
patent: 3553671 (1971-01-01), Hopkins
patent: 3582739 (1971-06-01), Daab et al.
patent: 3815531 (1974-06-01), Wurst et al.
patent: 3881435 (1975-05-01), Makabe
patent: 3896280 (1975-07-01), Blake
patent: 4014275 (1977-03-01), Herr et al.
patent: 4055131 (1977-10-01), O'Brien et al.
patent: 4134049 (1979-01-01), Gray
patent: 4140971 (1979-02-01), Blincoe

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