Textiles: knitting – Stopping – Needle cooperating element controlled
Patent
1979-05-25
1983-01-04
Feldbaum, Ronald
Textiles: knitting
Stopping
Needle cooperating element controlled
66157, D04B 3510
Patent
active
043666817
ABSTRACT:
A detector device is provided, in particular for detecting faulty needles or closed needle latches in a knitting machine with latch type needles, consisting of a non-electrically-conductive feeler which is normally resiliently urged into contact with the upper parts of the needle hooks, and an electrically-conductive probe which normally does not contact the needles but passes through the needle hook openings as relative movement of the needles past the detector takes place. However, if a needle latch is closed the probe makes contact with it and also if the needle hook is broken or bent the feeler is permitted to move laterally thereby enabling the probe to contact the faulty needle, contact of the probe with a needle completing an electrical circuit which signals a needle fault. For circular knitting machines in which the needles travel past the detector, the detector is associated with a controller that stops the machine when the faulty needle reaches a particular position in the needle travel path. By presetting two numbers into count circuits in the counter and stopping the machine first at the lower number before the final stopping position is reached and then allowing the machine to crawl to the final stopping position represented by the higher count numbers, errors in final stopping position due to machine overrun are largely or wholly eliminated. In a flat bed machine with stationary needles the detector may be mounted on a mobile carrier to traverse the needle bed and be associated with a battery-powered ultrasonic transmitter for transmitting the fault signal to a stationary receiver on the machine frame.
REFERENCES:
patent: 3690127 (1972-09-01), Tellerman et al.
patent: 3906752 (1975-09-01), Eichorst
patent: 3946578 (1976-03-01), Venczel
patent: 4026128 (1977-05-01), Blanco
patent: 4027982 (1977-06-01), Ohishi
Homocky John
Venczel Joseph
Feldbaum Ronald
Meiners Electronic Controls Ltd.
Rose Howard L.
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