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:
Dec. 13, 1977
Filed:
May. 04, 1976
Robert W Gundlach, Victor, NY (US);
Frederick W Hudson, West Henrietta, NY (US);
Standard Products Corporation, New Rochelle, NY (US);
Abstract
Apparatus for detecting bumps in a web, such as are caused by double threads or knots in a web of fabric, as the web is advanced past the detecting apparatus, comprises a blade, preferably a plurality of partially overlapping blades, arranged across the web and riding on the web. Each blade comprises one element of a switch the other element of which is constituted of a contact member arranged above the blade a distance from the blade greater than the height of the bumps to be detected. The blade is sufficiently light and so mounted that when it is struck by a bump on the web, it bounces out of engagement with the web and contacts the contact member thus closing the switch which is in an electrical circuit. A deactuatable means for moving the web is operatively associated with the switch whereby closing of the switch deactuates said web moving means. A marking means for marking the web when the switch is closed may also be operatively associated with the switch. Similarly, an audible signal may be operatively associated with the switch.