Presser bar lifter in a button perforating sewing machine

Details Presser bar lifter in a button perforating sewing machine Presser bar lifter in a button perforating sewing machine

1989-07-17

1991-06-11

Schroeder, Werner H.

Sewing

Elements

Presser devices

112 67, D05B 2900

Patent

active

050223348

ABSTRACT:
A stop lever fixing lever supported at a bed body of a sewing machine has one end to be contacted by a projection of a pattern wheel. A connecting member has one end connected to the other end of the stop lever fixing lever. A first presser bar lifter has one end connected to the other end of the connecting member. A second presser bar lifter has one end defining an operation arm positioned at a lifting position and has a folded projection provided with a hole. A stepped screw having a knurled thumb at the peripheral surface thereof is rotatably inserted in the hole of the folded projection edge with a small diameter screw portion at the tip end thereof. A lever shifting member is screwed into the small diameter screw portion at the folded projection edge. A presser bar lifter cam is disposed along a cutting axis and has a projection. The lever shifting member is engaged with the first presser bar lifter at one pivotable position for transmitting the swingable movement of the first presser bar lifter to the second presser bar lifter while it is engaged with the projection of the presser bar lifter cam and at the other pivotable position transmits the swingably movement of the presser bar lifter cam to the second presser bar lifter.

REFERENCES:
patent: 1136388 (1915-04-01), Allen
patent: 1807577 (1931-05-01), Allen

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