Hook drive for sewing machines

Details Hook drive for sewing machines Hook drive for sewing machines

1976-08-23

1978-10-24

Schroeder, Werner H.

Sewing

Stitch forming

Revolving-hook type

112184, 112220, D05B 5714

Patent

active

041215273

ABSTRACT:
This disclosure relates to hook drive mechanisms for sewing machines and in particular to a hook drive mechanism wherein the hook member is freely supported by a bearing means in a hook support plate carried by the bed portion of the frame and is driven by a likewise freely supported drive member. The support plate with the hook member is supported for relative adjustment with the needle for adjusting the hook point-to-needle relationship. The hook member is readily removable in that it is freely supported in the aforementioned bearing means and is otherwise only restrained by a movable restraining means carried by a hook member cover plate which when removed from restraining relationship permits the bobbin and the hook member to be easily lifted out from the machine. Further, means are carried on the hook support plate for adjusting and maintaining tension on a timing belt drive means for the hook mechanism.

REFERENCES:
patent: 2148385 (1939-02-01), Waterman
patent: 3373707 (1968-03-01), Ketterer
patent: 3420200 (1969-01-01), Johnson
patent: 3628479 (1971-12-01), Schafer
patent: 3693556 (1972-09-01), Ketterer
patent: 3804042 (1974-04-01), Ross
patent: 3894499 (1975-07-01), Hamlett
G. M. Pfaff Parts Catalog, Mar. 1950, pp. 10-11.

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