Textiles: knitting – Independent-needle machines – Circular
Patent
1991-03-28
1992-12-22
Schroeder, Werner H.
Textiles: knitting
Independent-needle machines
Circular
D04B 1566
Patent
active
051725711
ABSTRACT:
A needle selection device for circular knitting machines for women's stockings, including a pusher jacks associated with each of a plurality of needles of a needle cylinder, each pusher jack having two heels including an upper heel interacting, in a selection position, with a lower cam and a lower heel interacting, in a selection position, with a pressure cam, acting in a radial direction with respect to the cylinder, and with a raising cam. A horizontal collar is provided formed of non-magnetic material anchored around the needle, the collar defining a plurality of radial grooves. A plurality of horizontal elastic selector jacks are positioned in one of the radial grooves. A permanently magnetized ring is fastened below the collar, facing the selector jacks, spaced a distance from the selector jacks to retain said selector jacks only when said selector jacks are inclined downwardly. A permanent magnet is supported by a fixed structure with respect to the cylinder in a region of each pressure cam for removing the selector jack from the horizontal rest position for urging the selector jack to the permanently magnetized ring, to the position inclined downwardly. A vertical tappet is provided positioned between the permanent magnet and an inclined surface of the raising cam, and positioned under the selector jack for selective detachment of the selector jack from contact with the permanently magnetized ring, whereby the position of the selector jack maintains or modifies a position of the corresponding pusher jack upon passage of the pusher jack over the pressure cam for determining non-operation or operation of a corresponding needle.
REFERENCES:
patent: 3972206 (1976-08-01), Mureso
patent: 3973414 (1976-08-01), Golladay et al.
patent: 4196599 (1980-04-01), Guell
patent: 4688404 (1987-08-01), Elsasser
patent: 4989424 (1991-02-01), Furia
patent: 5070711 (1991-12-01), Gargiani
Calvert John J.
Schroeder Werner H.
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