Ignition arc monitor circuit
Patent 4053823 Issued on October 11, 1977. Estimated Expiration Date: 
October 11, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 11, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References RE27829 3862571 3882380 3904955 InventorApplicationNo. 05/679139 filed on 04/22/1976US Classes:324/395, Using an illuminating device to indicate spark plug condition324/399Wherein a measured electric quantity indicates spark plug conditionExaminersPrimary: Krawczewicz, Stanley T.AbstractElectronic apparatus for detection of improper arc in automotive vehicle ignition systems, and adapted for permanent installation in a vehicle, is disclosed. Ignition system dwell period and arc duration are measured for each ignition cycle and a visual indicator is enabled if the arc is less than desired duration. | |
