Charging circuit with SCR's triggered by pedestal and cosine modified ramp unijunction circuit having means for current limiting by controlling pedestal level
Patent 4031451 Issued on June 21, 1977. Estimated Expiration Date: 
June 21, 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.
June 21, 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 3382425 3504269 3586955 3766463 InventorAssigneeApplicationNo. 660764 filed on 02/23/1976US Classes:320/142Phase controlledExaminersPrimary: Hickey, Robert J.Attorney, Agent or FirmInternational ClassH02J 007/10AbstractA battery charging circuit gates charging current through a silicon controlled rectifier triggered by a pedestal and cosine modified ramp unijunction circuit. A battery potential sensing circuit limits the initial surge current delivered to a fully discharged battery and provides short circuit protection, a second battery potential sensing circuit limits the current delivered to a fully charged battery to a level required to maintain the float potential, and a charging current sensing circuit limits the average value of current delivered to the battery to a desired level during low battery impedance and/or high line conditions, all by controlling the pedestal level. | |
