Selective positioning system particularly for controlling guide

Details Selective positioning system particularly for controlling guide Selective positioning system particularly for controlling guide

1975-01-15

1976-09-07

Feldbaum, Ronald

Textiles: knitting

United needle machines

Straight

D04B 2300, D04B 2700

Patent

active

039786900

ABSTRACT:
Knitting-machine guide bars, which carry columns of guides through and then along a row of knitting needles and are moved longitudinally along the row on the basis of the content of a programmable read-only memory. Stepping motors which respond to the memory rotate pinions in directions and numbers of steps determined by the memory. Racks engaging the pinions articulate respective adjustable-leverage levers which reciprocate the separate guide bars longitudinally along the row. Respective springs press each rack against each pinion transverse to the rack length so as to eliminate slack. Longitudinal movement of the bars is synchronized with their transverse movements through the needle row by sensing when the guides clear the front of the needles and producing a synchronizing pulse that gates appropriate signals from memory buffers to the motors; and producing a synchronizing pulse on a separate channel when the guides are clear of the rear of the needles. Braking means brake the motors with torques of about 50% of the maximum motor torques.

REFERENCES:
patent: 1543402 (1925-06-01), Stevens
patent: 2681717 (1954-06-01), Spurgeon
patent: 2746583 (1956-05-01), Blevins
patent: 2892520 (1959-06-01), Sinclair
patent: 3028083 (1962-04-01), Beer
patent: 3762184 (1973-10-01), Schur et al.

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