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. 08, 1985
Filed:
Dec. 06, 1982
Miyuki Gotoh, Machida, JP;
Yoshimi Wada, Higashiyamato, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A weft sensor for a loom which can detect the presence or absence of a weft inserted into a warp shed at an acceptable moderate sensitivity on the basis of the majority decision of weft detection signals. When sensor sensitivity is too high, the weft sensor erroneously detects the fluff attached to the sensor as the presence of a weft, thus keeping the loom operated continuously. This erroneous detection reduces the quality of woven cloth. On the other hand, when sensor sensitivity is too low, the weft sensor erroneously detects a slender weft as the absence of a weft, thus keeping the loom stopped unnecessarily. This erroneous detection reduces the duty cycle of the loom. The weft sensor according to the present invention comprises a plurality of weft detectors and a majority decision circuit made up of a plurality of logical circuit elements such as AND, OR, NAND gates, etc.