Patent GB-863273-A (GB)
Title: Improvements in straight-bar knitting machines
IPC: D04B1/24
Filed: 1957-12-06
Abstract: 863,273. Knitting. MONK (SUTTON IN ASHFIELD) Ltd., S. A., and MONK, B. A. March 5, 1959 [Dec. 6, 1957], No. 37948/57. Class 74 (2). Loop transfer patterns, such as two diverging lines of-eyelets along which the fabric may be cut to provide a " V " neck, are produced by two groups 1, 2 of transfer points (and each group may comprise a plurality of spaced sets) carried by shafts 3, 4 borne by the fashioning machine and connected to nuts on right-handed and left-handed threads formed on a member 5, or members, turned in one direction or the other by ratchets and pawls operated by cams on the main-shaft where the shaft as been shogged, but controlled by bluffs which are rendered inoperative by studs on a secondary pattern chain driven from the main pattern control mechanism of the machine and bearing also studs to bring the fashioning machine into operation. The points are thus moved one needle space at a time at every patterning motion. The secondary pattern chain is advanced by a drum 12 which, by means of a hand lever 14, can be dog-clutched to and so driven by a drum 10 which advances the main chain, The main cam-shaft 9 is shogged, to bring the fashioning-machine into operation, by studs on the main chain for edge fashioning, or by studs on the secondary chain for loop transfer patterning; these studs withdraw a catch 6 and so allow a shog bolt 7 to be moved into operation by a spring 8. Since the selvedge edge fashioning points would otherwise always be brought into operation with the points 1, 2, the truck on the lever adjusting the normal fashioning screw is normally inoperative (so that the selvedge points make only an idle dipping motion) and is rendered operative by a stud on the main chain only when edge fashioning is desired. In order to maintain constant the number of courses between successive edge fashionings, whether the patterning mechanism is operative or not, the pattern chains are advanced only when the mainshaft rotates in the production of a knitted course. Therefore, a second catch 16 is provided to retain the shog bolt 7 inoperative immediately after a patterning or fashioning motion (and so before an advance of a pattern chain). At each revolution of the cam-shaft, the shog bolt is moved back to its inoperative position by a cam 15 and a cam 19 positions the catch 16 to prevent the return of the shog bolt until the pattern chains are advanced, at the next knitting cycle, rendering operative the catch 6 to hold the shog bolt clear of the catch 16, which is then returned to its inoperative position by a spring. Return of the points 1, 2, to their starting position, at the end of a pattern, is effected, during the next succeeding course, by a ratchet-wheel 23 on the member 5, and cooperating pawl 24 actuated through a truck 29 by a multi-lobed cam 26 on the shaft 9, the pawl being rendered effective, when necessary, by energization of a solenoid 27 through a switch closed by a stud on the secondary chain. When the cam-shaft is shogged, for patterning, the truck 29 moves on to a cam 28 on the shaft 9; and closure of the solenoid switch by a stud on the secondary chain will then cause backracking of the transfer points to their initial positions immediately after a transfer motion.