Battery powered electronic counter

Details Battery powered electronic counter Battery powered electronic counter

1979-07-31

1981-12-08

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92MS, 235 92FP, 328 48, H03K 2106, H03K 2132

Patent

active

043049885

ABSTRACT:
A battery powered electronic counter with an electronic accumulator (12), a switch (22) for resetting the accumulator (12) and disconnecting the battery (20), and an accumulator indexing circuit with a first pair of switch input terminals (28) having separate high and low impedance connections to the battery (2) for minimizing battery drain and reducing input signal noise sensitivity, a second pair of AC/DC input terminals (30) for receiving an input pulse of up to 250 volts and a transistor circuit with a transistor (74) and a resistor (76) for limiting the current through an optical isolator (68) for the AC/DC terminals (30).

REFERENCES:
patent: 2808535 (1957-10-01), Lee
patent: 3666928 (1972-05-01), Burke et al.
patent: 3777121 (1973-12-01), Jamieson
patent: 3846624 (1974-11-01), Kawanabe
patent: 3946210 (1976-03-01), Fleischer
patent: 3983373 (1976-09-01), Russell
patent: 3994419 (1976-11-01), Sasnett et al.
patent: 4016407 (1977-04-01), Mesecar et al.

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