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:
Aug. 04, 1998
Filed:
Jan. 24, 1997
Dieter Teufel, Langenargen, DE;
Lindauer Dornier Gesellschaft mbH, Lindau, DE;
Abstract
A method for monitoring the functional reliability of magnetic valves in pneumatically operated systems of an air jet loom, such as the valves for the relay nozzles, allows the failure of such a valve to be quickly detected and corrected. The characteristic progression curve (2) of the valve actuation current (I) as a function of time (t) is monitored for each magnetic valve to detect and evaluate the occurrence, relative timing, and magnitude of a characteristic feature (3), such as a current dip (3), in the increasing portion (2a) of the current progression curve (2). If the characteristic feature (3) is completely missing, or deviates in time or magnitude outside of a tolerance range relative to corresponding nominal values, then a corresponding fault signal is triggered or the weaving process is interrupted. Alternatively, the time of initiating the actuation signal for the respective valve is shifted to bring the actual operation of the valve back into the acceptable tolerance range.