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:
Aug. 26, 1997
Filed:
Feb. 05, 1996
Kunihiko Murata, Tsushima, JP;
Hideo Kawaguchi, Tajimi, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A sewing machine including a needle bar to which a sewing needle is secured, a needle-bar drive motor which reciprocates the needle bar, a hook, a hook drive motor which rotates the hook, a speed detector which detects a rotation speed of the needle-bar drive motor, an information obtaining device which obtains information indicating that the rotation speed of the needle-bar drive motor will change, and a control device which controls, based on the detected rotation speed of the needle-bar drive motor and the obtained information, the hook drive motor so that the hook is rotated in synchronism with the reciprocation of the needle bar.