Hand knitter needle selection - with a time cut:out switch to prevent damage if the lock is stationary

摘要

The programmed needle selection system for a hand-operated knitting machine has a lock sliding along the needle bed, a pattern data carrier and sensor, and an impulse transmitter on the lock for positioning markings on the needle bed to carry sensor signals only when commands can be executed. A time switch is incorporated in the signal path to disconnect operative signals for needle selection, according to pattern data, in the event that the lock remains static. Design prevents damage to the data store and current supply in the event that the sliding lock remains stationary at a critical point on its path.