High precision timepiece pace measuring device

Details High precision timepiece pace measuring device High precision timepiece pace measuring device

1976-05-10

1977-06-14

Swisher, S. Clement

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G04D 712

Patent

active

040289273

ABSTRACT:
A high precision timepiece pace measuring device wherein a first mask circuit inhibits the entry of a first signal of the timepiece so as to initiate a measurement of the pace of the timepiece from a second signal of the timepiece, while a second mask circuit inhibits the entry of timepiece signals, external noises and the like during a period from a time at the initiation of the measurement to a time immediately before the termination thereof, wherein a counter circuit which receives the timepiece signals as its inputs is connected to a nine's complement presetting circuit, to a carry detecting circuit and to normal and nine's complement circuits which are respectively selected in accordance with the presence and absence of a carry in the counter circuit, and wherein output pulses of the counter circuit are fed back via a counter matrix circuit so as to set the mask period of the second mask circuit.

REFERENCES:
patent: 3238764 (1966-03-01), Greiner
patent: 3370456 (1968-02-01), Jucker
patent: 3777547 (1973-12-01), Izumi
patent: 3805585 (1974-04-01), Palinkas
patent: 3946592 (1976-03-01), Ichikawa

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