Sewing machine having a device for initiating the movement of th

Details Sewing machine having a device for initiating the movement of th Sewing machine having a device for initiating the movement of th

1977-06-24

1978-07-04

Hunter, H. Hampton

Sewing

Elements

Thread cutting, severing or breaking

112254, 112300, D05B 6502

Patent

active

040982084

ABSTRACT:
The sewing machine includes a reciprocating needle bar with a thread-engaging needle which cooperates with a rotatable looper carrying the looper thread which is driven by a rotatable looper drive shaft. The construction includes a thread knife and a thread clamp mounted adjacent the looper and a catcher mounted on a catcher shaft for rotation therewith selectively in the same direction of movement as the looper toward engagement with the knife and in an opposite return direction. The construction includes an improved control member for operating the catcher which is freely rotatable on the looper shaft and is axially displaceable therealong between an operative position and an inoperative position spaced axially from the operative position. A coupler is provided between the control member and the looper shaft which includes a driver having a rod portion which extends in a groove of the control member. A biasing spring biases the control member into an operative position. A stud abutment is mounted to move toward and away from a control member between a starting and an operative position and may be locked in the starting position. The stud abutment is engageable with a cam portion of the control member and the cam portion acts to return the stud abutment to a starting position. A retaining member is located adjacent the control member and it is mounted so that it can be biased by a spring associated therewith to hold the control member in an operative position.

REFERENCES:
patent: 3054365 (1962-09-01), Ioannilli
patent: 3658021 (1972-04-01), Hedegaard
patent: 3756177 (1973-09-01), Landwehr
patent: 3776161 (1973-12-01), Papejewski et al.

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