Method for inspecting the running of a timepiece and timepiece a

Details Method for inspecting the running of a timepiece and timepiece a Method for inspecting the running of a timepiece and timepiece a

1982-07-01

1983-08-23

Truhe, J. V.

Horology: time measuring systems or devices

Regulating means

For adjusting the frequency or beat

368 69, 368 85, 368155, 368217, G04C 1308, G04B 2700, H03K 116, G04C 900

Patent

active

044000936

ABSTRACT:
In order to determine the adjustment precision .DELTA.T of a timepiece provided with an oscillator (1) and an adjustable frequency divider chain (3-18; 18-20) on which an adjustment unit (15) acts, initially the real period TQ of the oscillator is measured with the adjustment unit disconnected following a first actuation of a time setting circuit (21). A second actuation of said circuit then effects running of the display at a rate n times above the normal and the adjustment unit is connected. Following a time T
representing the adjustment cycle the period TQ is measured as corrected by the amount n.DELTA.T, thus TQ+n.DELTA.T. The first measured value obtained is subtracted from the second thus giving n.DELTA.T which when divided by n gives the adjustment precision .DELTA.T.

REFERENCES:
patent: 3777471 (1973-12-01), Koehler et al.
patent: 3895486 (1975-07-01), Hammer et al.
patent: 3914706 (1975-10-01), Hammer et al.
patent: 4051663 (1977-10-01), Chihara et al.
patent: 4142360 (1979-03-01), Akahane
patent: 4150536 (1979-04-01), Nakajima et al.
patent: 4173863 (1979-11-01), Motoki et al.
patent: 4199726 (1980-04-01), Bukosky et al.
patent: 4292836 (1981-10-01), Wiget

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