Method for inspecting the running of a timepiece and timepiece adapted for such method
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United States of America Patent
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Aug 23, 1983
Grant Date -
N/A
app pub date -
Jul 1, 1982
filing date -
Jul 6, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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/n 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.
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