Arrangement and method for preventing false triggering in an opt

Details Arrangement and method for preventing false triggering in an opt Arrangement and method for preventing false triggering in an opt

1982-12-13

1983-07-19

Nerbun, Peter P.

Sewing

Work manipulating

Guides

1122641, D05B 306

Patent

active

043937977

ABSTRACT:
An optical switching system for one step buttonholing substantially eliminates false triggering when an operator inadvertently moves an object within the viewing path of the optical sensor by utilizing signals from the sensors only when the sewing machine is running.

REFERENCES:
patent: 4182249 (1980-01-01), Matumura et al.
patent: 4216732 (1980-08-01), Marsh et al.
patent: 4232617 (1980-11-01), Garron
patent: 4363281 (1982-12-01), Reinke

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