Zig-zag sewing machine with an oscillating cradle for slidingly

Details Zig-zag sewing machine with an oscillating cradle for slidingly Zig-zag sewing machine with an oscillating cradle for slidingly

1989-11-30

1991-11-12

Schroeder, Werner H.

Sewing

Elements

Driving mechanisms

112443, 112459, D05B 302

Patent

active

050638653

ABSTRACT:
In a sewing machine, an oscillating cradle has two bearings in which a needle bar is slidingly mounted. An external surface of each bearing has a spherical profile by which it is pivotingly engaged in a respective seat of complementary shape provided in a first arm of the cradle, for an upper bearing, and in a second arm, for a lower bearing. A resilient leaf spring, in the form of a U, exerts an axial pressure on both the upper bearing and the lower bearing, to maintain them in their seats in alignment with one another.

REFERENCES:
patent: 2253110 (1941-08-01), Cornell
patent: 2862468 (1958-12-01), Johnson
patent: 2989016 (1961-06-01), Johnson
patent: 3782311 (1974-01-01), Adams et al.

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