GB768051A - Improvements in and relating to latch needles - Google Patents

Abstract

768,051. Making latch needles. STEINHOF, K., [trading as STEINHOF APPARATEFABRIK, K.]. Jan. 4, 1955 [June 25, 1954], No. 173/55. Class 83 (2). [Also in Groups VII and VIII] A latch knitting needle having a steel wire spring 14 mounted within a slot 3 in the needle shaft 2 for holding the latch 4 in a partly open and in a nearby fully open position, is made by cutting a slot having a circularly curved bottom, and punching an elongated opening 13 in the shaft through the bottom of the slot by means of a punch adapted to form at the same time two stepped recesses 12 in the slot adjacent the ends of the opening 13. The latch is then pivotally mounted in the slot and the needle shaft and latch are hardened together; subsequently the steel wire spring 14 is inserted by one end into the slot through the opening until it can be deflected to introduce the other end through the opening into the slot, this second end is raised by deflecting the spring upwardly by means of an assembling member 18 arranged to enter the opening from below and having an inclined guiding surface, and the spring is slid lengthwise while being deflected and guided by the member 18 until an end of the spring engages in one of the recesses 12; upon withdrawal of the assembling member 18 the other end of the spring engages the other recess. The cutting of the slot 3 may be performed by a circular saw. The punch for punching the elongated opening has a central rectangular punch part flanked by narrow wedge -shape parts at its two narrow sides.