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:
Apr. 05, 1988
Filed:
Oct. 20, 1986
Applicant:
Inventor:
Charles E Brocklehurst, Fountain Inn, SC (US);
Assignee:
Sew Simple Systems, Inc., Fountain Inn, SC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D05B / ;
U.S. Cl.
CPC ...
112273 ; 200 6118 ;
Abstract
In a sewing machine a thread 20 moves through a check spring 30, through a takeup arm 32, and to a needle 15. During normal operation, a proximity detector 55 detects the movement of a flag 50 attached to a loop 36 of the check spring during each movement of the takeup arm 32. The proximity detector is supported in a position adjacent the path of movement of the flag. When the thread breaks at the needle, tension is no longer applied to the thread by takeuparm 32, so that check spring 36 and its flag 50 no longer move in front of the detector 55, causing a control circuit to deactivate the sewing machine motor.