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. 19, 1977
Filed:
Mar. 27, 1975
Francis T Thompson, Murrysville, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A system incorporating a cathode ray tube display device, a comparator circuit and a data recording media is utilized to continuously display measured parameters and selectively apply signals corresponding to the measured parameters for permanent recording when the measured parameters vary beyond predetermined limits. A delay type circuit is employed to provide permanent recording of signals occurring prior to the excursion of the measured parameter beyond the predetermined limits thus providing a basis for evaluating operating conditions existing prior to an unacceptable variation of a parameter beyond predetermined limits. The permanent recording of the measured parameter extends from a time prior to the occurrence of an out of limits condition, indicative of an abnormal operating condition, to a time following termination of the out of limits condition, additionally a multi-channel cathode ray tube display provides simultaneous display of individual traces representing a plurality of measured parameters wherein control circuits permit stationary display of some parameters while providing updating of information contained in other traces.