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:
Feb. 13, 1990
Filed:
Mar. 01, 1989
Akio Takahashi, Hashima, JP;
Mamoru Yasuda, Kasugai, JP;
Abstract
A control device for a cyclic sewing machine for controlling driving condition of a main shaft of a cyclically operated sewing machine. The control device includes a clutch mechanism provided between a driving source and a main shaft, a switching member for switching the clutch mechanism between a power cutoff condition, a low-speed drive condition and a high-speed drive condition, a control cam rotatable at a reduced speed in interlinked relation to the main shaft, and a lost-motion connecting means. When switch the sewing machine from the power cutoff condition to the low-speed condition, a lost-motion is produced between the operating member and the switching member. The control cam is rotated in response to rotation of the main shaft, the operating member and the switching member are moved in accordance with cam profile. The clutch mechanism and hence the main shaft are switched between the drive conditions based on the movement of the switching member.