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:
Oct. 12, 2004
Filed:
Jun. 12, 2002
Yasushi Mizuno, Chita-gun, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A stitch balancing thread tension of a sewing machine includes a rotary disk having a surface extending perpendicular to an axial direction of a shaft on which the rotary disk is mounted. The thread breakage detection device includes a permanent magnet member attached to the surface of the rotary disk , a hole element that detects a magnetic field generated at the permanent magnet member and outputs detection signals, and a detection unit that detects the thread breakage based on the detection signals from the hole element . Because the thread breakage detection device is integrally formed to the stitch balancing thread tension , the thread breakage detection device can be provided to the sewing machine without increasing a number of components and the size of the sewing machine