The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 1980
Filed:
Mar. 22, 1979
Shuichi Sato, Utsunomiya, JP;
The Singer Company, New York, NY (US);
Abstract
A feed regulator means having both manual stitch length control and pattern cam control of the work feeding mechanism of a sewing machine. A feed regulator crank secured to a feed regulator shaft is the driven link of a four bar linkage system. A manually operable camming device is operably engaged with the four bar linkage for stitch length selection and for simultaneously establishing the proportionate amount of motion transmitted from a pattern cam, which is also operably engaged with the four bar linkage, to said feed regulator shaft. A proportional link is in operable engagement with said four bar linkage such that the stitch length selection of the camming device may be altered without effecting angular movement of said feed regulator crank when a portion of the pattern cam is being tracked which dictates a zero stitch length. The operator control device for stitch length selection, when depressed, will immediately reverse the direction of feed and will maintain a stitch length equal to the stitch length setting of the camming device. The reversal of feed is independent of and overrides the operation of said pattern cam.