Patent GB-939297-A (GB)
Title: A ribbon threading machine
Inventor: BROUNCKER CHARLES FREDERICK
IPC: D04D11/00
Filed: 1961-04-19
Abstract: 939,297. Sewing machines. J. & P. JACOBS Ltd. March 28, 1962 [April 19, 1961], No. 14065/61. Class 112. [Also in Group XVI] A machine for threading slotted work on to a rigid member comprises a work guide adjacent one end of said member, means for sensing said slots in the vicinity of said end, an actuator responsive to the sensing means for oscillating the work guide to align said slots successively with said end, and means for drawing the work on to said member. As shown, slotted lace 1 is threaded on to a bodkin 26, in to the eye 48 of which tape is inserted to be subsequently drawn through the slots la in the threaded lace. The bodkin 26 is held horizontally by a clamp 43 positioned adjacent the eye 48, and passes between a pair of feed rollers 27, 28 through circumferential grooves formed therein. Wheel 27 is journalled in a stand 40 and is positively driven. Wheel 28 is journalled in a counterweighted arm 39 pivoted to stand 40. A channel work guide 8, pivoted to a stand 10, is connected at its inlet end to the plunger 12 of a solenoid 14, and its outlet end is positioned adjacent the point of bodkin 26. Said outlet end is biased downwardly by a spring 16. A bar 18 has one end pivoted to a fixed pin 22 above guide 8, has its other end disposed in a notch 17 formed in the outlet end of guide 8, and rests intermediately on a pin 20 carried by guide 8. A bar 19 has one end pivoted to a fixed bracket 24 below guide 8 has its other end disposed in notch 17, and passes intermediately through a slotted member 25 carried by guide 8. A support 35, adjustably mounted in stand 10, has pivoted thereto a pair of crossed arms, one pair of adjacent ends 30 of which carry a pair of feeder plates 29 disposed immediately above bodkin 26 adjacent its point. A spring 30a tends to close said arms, whereby the feelers 29 abut and an end 33 opens a microswitch 31 carried by the adjacent end 32. Work is fed to the guide 8 by a pair of rollers 3, 4, and after passing under a pair of spring fingers disposed one on each side of notch 17, is drawn on to bodkin 26 by the rollers 27, 28. The ridge formed above the bodkin between a pair of slots la separates the feelers 29, whereby end 33 moves away from switch 31 to allow closing of the latter for energizing solenoid 14. The outlet end of guide 8 is thereby raised, and bar 19, swung upwardly by member 25, serves to raise the work still further to align the first slot of the next pair with the point of the bodkin. When the feelers 29 re-abut in the space between successive pairs of slots la, end 33 opens switch 31 to de-energize solenoid 14, whereby spring 16 lowers the outlet end of guide 8, and rod 18 pivoting downwardly on pin 20 serves to lower the work still further to align the second slot of the pair with the bodkin point. The work threaded on to the bodkin is drawn to the clamped end thereof by flexible members 46 projecting from an endless driven belt 44. When roller 28 is raised by swinging arm 39, the free end of the latter displaces a spring-biased bar 41 carrying a pin 42 which thereby serves to separate the ends 30 and feelers 29 to immobilize the machine. It is stated that a feeler member may, alternatively, be arranged to rest upon the bodkin, the feeler being thereby raised by the work to actuate a relay for energizing the solenoid.