System and method for reducing the pulse repetition rate in an e

Registers – Transfer mechanism – Traveling pawl

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235 30R, 235 45, 235156, G07B 1310, G06F 1520

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active

039379337

ABSTRACT:
The taxi meter receives a sequence of pulses each representing a determined distance travelled by the taxi. The repetition rate of the input pulses is to be reduced by a ratio T so that each pulse having the reduced repetition rate signifies a determined fare increment. An adder or counter has a determined capacity and furnishes a carry signal whenever the sum signal created therein exceeds that capacity. An addend equal to K/T where K is the capacity of the adder is applied to the input of the adder for addition therein in response to each of the input pulses. The carry signals furnished by the adder constitute the desired signals each signifying the correct fare increment. The repetition rate of pulses each signifying a unit of waiting time can be similarly reduced and the resulting carry pulse sequences be applied to a selection circuit which selects the one having the highest repetition rate to constitute the tariff signal, namely the signals for advancing the taxi meter by one fare increment.

REFERENCES:
patent: 2892933 (1959-06-01), Shaw
patent: 2913179 (1959-11-01), Gordon
patent: 3388859 (1968-06-01), Kelch et al.
patent: 3703985 (1972-11-01), Berg
patent: 3818186 (1974-06-01), Harwood

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