Needle position detector for industrial type sewing machines

Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel

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Details

318266, 112219A, G05G 500, H02P 306, D05B 6922

Patent

active

040139336

ABSTRACT:
A rotating disc driven in synchronism with the reciprocating movement of the needle of a sewing machine has a plurality of cutaway arc-shaped sections having different arcs to produce a pulse train of frequency related to the motor speed. A photoelectrical device responds to intermittent light the interceptions being caused by the rotating disc. The pulse train comprises pulses of different pulse lengths, each corresponding to the lower and upper dead points of the needle. First and second pulse length detectors are provided to detect sequentially each of the pulse lengths in a controlled manner by the operator manipulation of a treadle so that the motor is decelerated from a preselected speed to a standstill with the needle at its lower or upper dead point.

REFERENCES:
patent: 3187701 (1965-06-01), Heit et al.
patent: 3482538 (1969-12-01), Hayashi et al.
patent: 3532953 (1970-10-01), Daab et al.
patent: 3573581 (1971-04-01), Dutko et al.
patent: 3622854 (1971-11-01), Imai et al.
patent: 3659172 (1972-04-01), Kuniaki et al.
patent: 3738297 (1973-06-01), Sangiorgi
patent: 3757232 (1973-09-01), Matuda
patent: 3761790 (1973-09-01), Daab
patent: 3763803 (1973-10-01), Matsuda
patent: 3804043 (1974-04-01), Benson et al.

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