Registers – Odometers
Patent
1975-04-28
1976-04-06
Tomsky, Stephen J.
Registers
Odometers
235 96, G01C 2200
Patent
active
039492010
ABSTRACT:
The invention consists of an improved method of constructing and installing digital counting devices, such as odometers, digital time recorders and digital gauges, consisting of a self-destructing and tamperproof "first" or left counting wheel. The numeral of the "first" counting wheel is obliterated by mechanical (or other) means after such numeral has passed the viewing window, thereby making it useless to attempt to "wheel back" the counter to indicate lesser usage, and thereby promoting safety and honesty to and by user, seller and buyer of the machines or devices to which the digital counter is attached. Such improved counters are practically irreversible. The invention accomplishes such goals by abrading, crushing, painting over, expunging, cutting off, slicing through, chiseling off the numeral after it has passed the viewing window, or burning such numerals off by passing them through electrodes which close a circuit when the numeral is moved forward, immediately thereafter interrupting the flow of current, or, in the alternative, being obliterated by magnetic means.
REFERENCES:
patent: 2589623 (1952-03-01), Merritt et al.
patent: 3544002 (1970-12-01), Summerer et al.
patent: 3580497 (1971-05-01), Powell
patent: 3583629 (1971-06-01), Heidel
patent: 3785551 (1974-01-01), Regan
Munro Jack C.
Tomsky Stephen J.
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