Method and apparatus for determining whether an electronic taximeter is in proper working order
Self service postal apparatus and method
Electronic postage metering system
Electronic postal meter system Patent #: 4251874
ApplicationNo. 06/144337 filed on 04/28/1980
US Classes:705/405Data protection
ExaminersPrimary: Wise, Edward J.
Attorney, Agent or Firm
International ClassG07B 17/00 (20060101)
Foreign Application Priority Data1979-04-26 DE
AbstractElectronic control for franking machines such as postage meters and stamping machines having a printing device, a postage value printing selection device, a total postal charge storage register and a settable subtracting value counter, including a microprocessor, a volatile main memory for storing data and non-volatilesemiconductor memories for storing data and the number of writing cycles performed, the memories being connected to the microprocessor, a line voltage power supply, supply capacitors disposed in the power supply, a switch controlled by the microprocessor for connecting the non-volatile memories to the supply capacitors of the power supply exclusively in the event of an interruption of the line voltage to cause the non-volatile memories to take over data stored in the main memory, and a register connected to one of the non-volatile memories for preventing the exceeding of a predetermined number of writing cycles of the one non-volatile memory after the power supply resumes.