Textiles: knitting – Fabric manipulation – Take-ups
Patent
1974-03-27
1976-06-08
Stein, Mervin
Textiles: knitting
Fabric manipulation
Take-ups
310 85, D04B 1566
Patent
active
039615014
ABSTRACT:
The knitting machine includes a carrier, and a plurality of knitting-needle units, each comprised of a needle portion and a motion-transmitting portion mounted on the carrier for longitudinal reciprocation and movable between an operative position and a non-operative position. A motion-imparting arrangement, for example comprised of lifting and lowering cams, impats longitudinal motion to those of the motion-transmitting portions which are in the operative position. A selecting arrangement selects the positions of the motion-transmitting portions. The selecting arrangement includes a selecting cam arrangement which is movable between a first position in which the selecting cam arrangement engages the motion-transmitting portions and moves the latter to one of the positions thereof and a second position in which the selecting cam arrangement is not operative for so moving the motion-transmitting portions. A cam-position control arrangement includes at least one cam position control member comprised of a material, for example piezoelectric material, which upon application of an energizing signal to the control member undergoes a dimensional change causing the control member to control the position of the selecting cam arrangement. As a further possibility, the selecting arrangement comprises a plurality of elongated force-transmitting members, one for each of the motion-transmitting portions, with each elongated force-transmitting member being mounted on the carrier. Control cams are mounted for movement relative to the carrier, or vice versa, and are operative for effecting longitudinal movement of the force-transmitting member to a position causing the respective motion-transmitting member to assume one of its respective positions. A biasing spring urges the force-transmitting member back in the opposite direction, and a detent of for example piezoelectric material is energizable or deenergizable to assume a position locking the force-transmitting member in the activated position thereof against the returning force of the biasing spring.
REFERENCES:
patent: 2067877 (1937-01-01), Lawson et al.
patent: 3229482 (1966-01-01), Farmer
patent: 3423960 (1969-01-01), Weisinger et al.
patent: 3459126 (1969-08-01), Nyman
patent: 3815383 (1974-06-01), Hamma
patent: 3828826 (1974-08-01), Hurzeler et al.
Falik Andrew M.
Mayer & Cie. Maschinenfabrik
Stein Mervin
Striker Michael J.
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