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:
May. 18, 1993
Filed:
Dec. 11, 1991
Yasuo Sakakibara, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
A bobbin thread remainder detecting device for detecting an amount of remainder of a bobbin thread wound up around a bobbin for a sewing machine, in which a winding leading end portion of the bobbin in a winding direction reverse to a winding direction of another portion of the bobbin thread, comprises a bobbin rotating direction detecting unit, including light emitting and receiving elements, disposed in a vicinity of a bobbin case for detecting a rotating direction of the bobbin and a bobbin thread remainder detecting unit, including an electronic control circuit element, disposed in association with the rotating direction detecting unit for detecting the amount of the remainder of the bobbin thread in response to rotation of the bobbin in a particular direction as detected by the rotating detecting unit. The bobbin thread remainder detecting unit detects reducing the bobbin thread remainder wound up around the bobbin at a time when the rotating direction of the bobbin changes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile