Apparatus for measuring the rate of a watch

Details Apparatus for measuring the rate of a watch Apparatus for measuring the rate of a watch

1977-01-28

1978-04-11

Gill, James J.

Measuring and testing

Instrument proving or calibrating

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

G04D 712, G04F 510

Patent

active

040832228

ABSTRACT:
An apparatus for measuring the rate of a watch is disclosed including a sensing device for the signals produced by a watch to be checked, a selecting and pulse shaping circuit, and comparator means for comparing the repetition frequency of the measuring pulses with the frequency of standard pulses. The selecting and pulse shaping circuit is designed to constitute a monostable multivibrator the period of which is automatically adapted to the period of the signal to be measured. The selecting circuit is unsensitive to secondary and disturbing noise signals during a very high percentage of the time interval corresponding to the period to be measured and allows the checking of watches having frequencies between about 1 Hz and 32 kHz.

REFERENCES:
patent: 3756066 (1973-09-01), Bolliger
patent: 3811314 (1974-05-01), Anouchi

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