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. 02, 1989
Filed:
Jul. 10, 1987
Jeffrey N Arensmeier, St. Louis, MO (US);
Robert W Haul, St. Louis, MO (US);
Emerson Electric Co., St. Louis, MO (US);
Abstract
A microcomputer-based spark ignition gas burner control system includes program logic to ensure compatibility of spark ignition and a microcomputer. The program logic provides for periodically re-defining the I/O (input/output) ports so as to negate the adverse effect of any electrical noise generated in the system. The program logic also provides, during ignition, a cyclically re-occurring finite time period during which sparking occurs followed by a finite time period during which flame detect circuit means is enabled. The system further includes a fault-tolerant spark generating circuit to ensure that sparking is inhibited during times that the combustion chamber is being purged of any combustible mixture.