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:
Sep. 06, 1983
Filed:
Oct. 30, 1980
Glen C Young, Fort Wayne, IN (US);
Michael B Durant, Fort Wayne, IN (US);
Essex Group Inc., Fort Wayne, IN (US);
Abstract
In an electronic control system, as for instance, one employing a microcomputer, a timing reference signal supplied to the microcomputer, typically from the AC supply line, is monitored for continuity and integrity by determining whether that signal occurs or recurs some predetermined number of times relative to a measuring interval. The measuring interval is established by an event provided by the microcomputer and which recurs with a generally known time relationship to the timing reference signal. Failure of the timing reference signal to occur or recur within the measuring interval is interpreted as a failure of the timing reference, and a reset command is automatically executed to automatically reset or initialize the control system. A display, for instance associated with an appliance such as a microwave oven, may be repetitively scanned at some normal interval in response to the programmed control of a microcomputer. The measuring interval for monitoring the timing reference may be established from the display scan signal and the monitoring operation may be performed with a program stored in the microcomputer.