Battery charger
Patent 4242627 Issued on December 30, 1980. Estimated Expiration Date: 
December 30, 1997. 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.
December 30, 1997. 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 3586955 3766463 3781631 3876921 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 InventorApplicationNo. 05/857101 filed on 12/05/1977US Classes:320/143With voltage compensationExaminersPrimary: Hickey, Robert J.Attorney, Agent or FirmInternational ClassH02J 7/00 (20060101)AbstractA battery charging system for charging a battery from an AC source, including control rectifier means for rectifying the charging current, a pulse generator for triggering the rectifier to control the transmission of current to the battery, phase control means for timing the firing of the pulse generator according to the charge on the battery, and various control means for alternatively controlling the phase control means depending upon the charge on the battery; wherein current limiting means are provided for limiting the charging current according to the charge on the battery to protect the system from excessive current in the event a weak battery is being charged, a feedback circuit is provided for maintaining the charge on a battery to compensate for battery leakage, and circuitry is provided for equalizing the voltage between the respective cells of the battery. | |
