Cam carriage in dual-bed hand knitting machine

A hand knitting machine for pearl knitting comprising two needle beds arranged opposedly and spacedly in a horizontal plane, each of said beds having a plurality of vertical needle grooves, and a manually actuatable cam carriage having a yarn feeder at the center thereof either transversely or vertically and two cam arrangement base members to be transversely reciprocated astride and along said two beds, each of said base members having on the reverse side thereof two passages defined by a plurality of cam plates and extending along the transverse length thereof symmetrically in respect of said central yarn feeder, so that when actuating said carriage a plurality of double hook latch needles arranged respectively in said needle grooves are successively subjected to vertically forward and rearward movement along the respective needle groove according to engagement of every latch cleared hook on one side of the needle directly with any of said passages, whereby every opposite side hook may be subjected to knitting operation on the opposite needle bed and beneath the opposite cam arrangement base member, wherein the improvement lies in the cam carriage comprising;

• four needle latch passages arranged symmetrical either transversely or vertically in respect of said central yarn feeder, each having an entrance, a forwardly inwardly slanted part for advancing the needle to cause "latch-over" movement, a rearwardly inwardly slanted part for retracting the needle, a central part so located that when the passage cam engaging hook of the needle lies therein the opposite hook of which concerned latch is cleared may face just at the yarn feeder for receiving yarn, a rearwardly outwardly slanted part for further retracting the needle to cause "knock-over" movement, a forwardly outwardly slanted part for advancing the needle, and an exit symmetrically positioned in relation to said entrance, said exit being to be an entrance of the other passage arranged symmetrically on the same cam arrangement base member so as to have said central part commonly and for the needles each to pass therethrough when actuating the carriage in the opposite direction;
• four pairs of symmetrically arranged guide members, each provided at the outermost end of said cam arrangement base member and having inwardly convergent guide faces therebetween so as to bring the passage cam engaging hook of the needle eventually not in the vertically correct position in the concerned needle groove correctly to said passage entrance;
• four symmetrically arranged members for clearing the needle latch on the passage cam engaging hook side, each having a transversely outwardly pointed portion and provided at the concerned passage entrance so as to clear the eventually closed latch;
• and
• two symmetrically arranged pivoted arm members, each pivoted between said yarn feeder and said yarn receiving central part of the passage so as to be freely angularly moved by substantially 180.degree. between the two positions in either of which the inner side of the transversely elongated arm is substantially parallel to the carriage travel direction, whereby when said arm member is in its operative position in which the arm member extends in the direction opposite to the carriage travel, the inner side of said arm member abuts on the knitting operation hook so as to correctly guide the passage cam engaging hook from the central yarn receiving passage part into the rearwardly outwardly slanted passage part for retracting the needle and causing the "knock-over" movement.