Needle bar drive stabilizing arrangement

Details Needle bar drive stabilizing arrangement Needle bar drive stabilizing arrangement

1977-05-16

1978-08-22

Schroeder, Werner H.

Sewing

Elements

Driving mechanisms

D05B 5514

Patent

active

041080963

ABSTRACT:
A drive mechanism for reciprocating a sewing machine needle bar endwise from an actuating crank is disclosed in which the lateral stud on the needle bar to which the drive link is connected is fitted with a ball bearing slidably constrained in a guide slot formed parallel to the path of needle reciprocation in a stationary guide frame. The forces and reactions occasioned by alternate acceleration and decelleration during each needle bar stroke will cause the outer race of the ball bearing to engage first one side then the opposite side of the guide slot during each stroke thus turning the bearing in opposite directions and distributing the wear.

REFERENCES:
patent: 3011462 (1961-12-01), Ritter et al.
patent: 3460498 (1969-08-01), Eguchi et al.
patent: 3641955 (1972-02-01), Brown et al.
patent: 3779187 (1973-12-01), Adams
patent: 3799090 (1974-03-01), Sheroff
patent: 3919952 (1975-11-01), Lund
patent: 4037548 (1977-07-01), Hirayama et al.

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