Reversible feed mechanism for sewing machines

Details Reversible feed mechanism for sewing machines Reversible feed mechanism for sewing machines

1983-03-07

1984-10-16

Schroeder, Werner H.

Sewing

Stitch forming

Feeding work material

D05B 2722

Patent

active

044767951

ABSTRACT:
A setting mechanism for the feed dog of a sewing machine having a setting member secured to a setting shaft for determining the amount and direction of the feed movement for the feed dog, comprises a reversal lever which is pivotable between two end positions and biased into one of the end positions by a return spring. To be able to vary the setting torque by which the return spring opposes the setting motion of the reversal lever, the other end of the return spring is connected to the reversal lever through a linkage. This linkage includes an end member having its pivotal axis coaxial with the setting shaft. The torque of the return spring, which normally increases with the progressing pivoting of the reversal lever may be reduced by a linkage design wherein the torque acting on the reversal lever through this linkage reverses within the actuating range of the lever.

REFERENCES:
patent: 1731080 (1929-10-01), Moffatt
patent: 4143608 (1979-03-01), Coulombe
patent: 4183314 (1980-01-01), Sato
patent: 4271776 (1981-06-01), Landwehor

Affiliated with

Also associated with

Rating

Reversible feed mechanism for sewing machines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reversible feed mechanism for sewing machines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reversible feed mechanism for sewing machines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1941963