Feed mechanism for sewing machines

Details Feed mechanism for sewing machines Feed mechanism for sewing machines

1979-10-24

1981-10-20

Hunter, H. Hampton

Sewing

Stitch forming

Feeding work material

112323, D05B 2702

Patent

active

042954347

ABSTRACT:
This disclosure relates to a four motion feed mechanism for sewing machines that is adapted to advance a work piece past the stitch forming point of the machine. Orbital movement is imparted to the feed dog by a drive mechanism including first and second linkage assemblies driven off a common eccentric arranged on the sewing machine bed shaft. A feed lift regulatory assembly is operatively connected to one of the linkage assemblies and is provided to selectively modify the amplitude of lift that is imparted to the feed dog of the machine.

REFERENCES:
patent: 558663 (1896-04-01), Richards
patent: 1054715 (1913-03-01), Richards
patent: 1543945 (1925-06-01), Moffatt
patent: 1581496 (1926-04-01), Weis
patent: 1864165 (1932-06-01), Allen
patent: 2172559 (1939-09-01), Kaier
patent: 2303839 (1942-12-01), Hoza
patent: 2546939 (1951-03-01), Breul
patent: 2550553 (1951-04-01), Graesser et al.
patent: 2725023 (1955-11-01), Ayres

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