Auxiliary feed stitch regulator mechanism

Sewing – Stitch forming – Feeding work material

Patent

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Details

D05B 2708

Patent

active

042443148

ABSTRACT:
An auxiliary feed regulator for a differential feed mechanism, which auxiliary regulator may be manipulated by a sewing machine operator during sewing without feed back or vibration to the operator. An auxiliary regulator foot treadle may be connected to an auxiliary feed actuating lever by the usual chain, the feed actuating lever being formed with a slot for receiving a stud carried by a one end of a connecting link, the other end of which is operatively associated with a slider carried by an auxiliary feed rock lever. The slot in the feed actuating lever extends in a direction to give the greatest distance from the pivotal connection of the feed actuating lever and from the slider at the extreme thereof effective during feed motion and to the least distance therefrom at the extreme thereof effective for return motion. This construction permits restraint against motion during the feeding motion of the cycle, and permits some motion to take place during the return motion of the sewing machine feed dog without transmission of the motion to the feed actuating lever and thereby to the sewing machine operator.

REFERENCES:
patent: 3611817 (1971-10-01), Smith et al.
patent: 4027609 (1977-06-01), Kerr
patent: 4095540 (1978-06-01), Kattenbach et al.
patent: 4140020 (1979-02-01), Travaglini

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