Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Measuring or testing
Patent
1983-09-12
1985-12-17
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Measuring or testing
377 20, 364467, 364561, 36443112, 365228, H03K 2130, G06F 1520, G06F 1100
Patent
active
045596379
ABSTRACT:
The totalized count obtained from a seriate train of signal pulses is stored in a programmable memory means as a permanent state change in a separate memory cell for each count increment. Memory economy is had since each count increment preferably is stored in its respective memory cell as a singular bit change. Display of the totalized count is provided, usually as visual digital characters, through decoding and displaying of the memory address byte signal. When power has been interrupted, or the memory address has otherwise been upset, the totalizing counter is reset. It then quickly runs-up, under control of a CLOCK signal, through all the changed state memory cells until the lowest order yet unchanged cell is addressed, whereupon a state detector produces a signal that inhibits the clock and enables the display of the instant memory address thus obtained. Useful application as a permanent, nonresettable motor vehicle odometer is taught, including reservation of some memory space for retention of key indicia, such as a vehicle identification number (VIN), which may be read out to authenticate the vehicle's association with the displayed odometer mileage. A resettable vehicle trip odometer is also inclusively shown. Overall result is a bright digital display odometer indication that has intrinsically permanent, accumulated travel mileage storage and which resists tampering to an extent greater than obtained with ordinary mechanical numeral wheel odometers.
REFERENCES:
patent: 3865305 (1975-02-01), Sampey
patent: 4031363 (1977-06-01), Freeman et al.
patent: 4234920 (1980-11-01), Van Ness et al.
patent: 4263657 (1981-04-01), Oka et al.
patent: 4348729 (1982-09-01), Sasayama et al.
patent: 4388706 (1983-06-01), Butler
patent: 4458307 (1984-07-01), McAnlis et al.
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