Low bobbin thread detector

Details Low bobbin thread detector Low bobbin thread detector

1988-08-08

1989-05-02

Nerbun, Peter

Sewing

Elements

Thread sensing

112273, D05B 4500

Patent

active

048257893

ABSTRACT:
An optical low bobbin thread detector is disclosed utilizing particularly cost effective matrixed light emitting diodes for bobbin thread detection and alarm, and virtually eliminating false alarms by employing a system requiring detection of a predetermined number of successive valid low bobbin thread detections to justify actuation of the alarm.

REFERENCES:
patent: 4212257 (1980-07-01), Herron et al.
patent: 4413581 (1983-11-01), Logan
patent: 4693196 (1987-09-01), Hager

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