Sewing – With tables or stands – For plural sewing units
Patent
1976-08-12
1977-04-26
Krizmanich, George H.
Sewing
With tables or stands
For plural sewing units
D05B 2702
Patent
active
040194507
ABSTRACT:
A feed regulator shaft lock for a sewing machine operative during the feed of a work material to insure retention of a selected feed against feed back of forces from the feed dogs. A radially functioning cam is supported on a feed shaft in timed relationship to a feed lift cam also supported thereon. A brake member is affixed to a feed regulator shaft, on which a feed regulator is also supported for selective variation thereof by a manual control or by a cam. A shiftable member extending between the cam on the feed shaft and the brake member on the feed regulator shaft may be urged by the cam into pressure contact with the brake member during that portion of the sewing cycle when feed of the work material is effected.
REFERENCES:
patent: 3527183 (1970-09-01), Szostak
patent: 3534696 (1970-10-01), Willenbacher et al.
patent: 3834334 (1974-09-01), Adams
patent: 3921552 (1975-11-01), Daman et al.
Bell Edward L.
Krizmanich George H.
Schmidt Edward P.
Smith Robert E.
The Singer Company
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