Frequency deviation meter for timepieces

Details Frequency deviation meter for timepieces Frequency deviation meter for timepieces

1979-02-23

1980-09-30

Swisher, S. Clement

Measuring and testing

Instrument proving or calibrating

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

G04B 1700

Patent

active

042248205

ABSTRACT:
A frequency deviation meter provides a display of the error in a timepiece's internal oscillator, and includes a plurality of pickup devices among which are electrostatic and ultrasonic detectors. Frequency of the timepiece's oscillator and the frequency error is displayed as seconds lost or gained per month. An elongated aluminum alloy resonant column of tool stock material having a crystal pickup provides a sensitive vibration detector assembly.

REFERENCES:
patent: 3690144 (1972-09-01), Bonny
patent: 3811315 (1974-05-01), Kunitomi
patent: 3817083 (1974-06-01), Jucker
patent: 3892124 (1975-07-01), Reese
patent: 3946592 (1976-03-01), Ichikawa
patent: 4024750 (1977-05-01), Erickson
patent: 4083222 (1978-04-01), Stawiski

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