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:
Apr. 03, 2007
Filed:
Sep. 04, 2000
Masayoshi Sakai, Kuki, JP;
Toshihito Shirai, Kuki, JP;
Akira Morisada, Kuki, JP;
The Nippon Signal Co, Ltd., Tokyo, JP;
Abstract
The present invention relates to a failure detecting system that enables the detection of a break in a rail and the like by a simple network configuration. Detecting units (and), relay units (A,B,A throughC) and terminal units (and) are arranged along rails (A andB). Using the rails (A andB) as transmission media, ultrasonic waves transmitted from the detecting units (and) are transmitted to the terminal units (and) by the relay units (A,B,A throughC), and when the terminal units (and) receive the ultrasonic waves, the ultrasonic waves are returned from the terminal units (and), relayed by the relay units (A,B,A throughC), and transmitted to the detecting units (and). Thus, it is judged whether there is a break in the rails (A andB), based on the ultrasonic wave reception state in the detecting units (and).