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:
May. 08, 1990
Filed:
Sep. 02, 1988
Rebecca A Bird, Earlysville, VA (US);
Sperry Marine Inc., Charlottesville, VA (US);
Abstract
A sensor input/output system in a main radar system maintains continuous power to the compass interface when the main radar system is shut down. A single level of interrupt handlers is utilized without interrupt nesting or control by task executive software. The sensor input/output system is functionally partitioned such that all of the service required by an interrupt is continuously provided until the service is completed. A digital processor for providing the interrupt servicing and control and PROM firmware for storing the interrupt handlers also have backup power continuously applied. Since the processor compass interrupt handler and compass interface are continuously powered, heading synchronization is maintained by the main radar system during power down conditions.