发明名称 |
Frequency deviation meter for timepieces |
摘要 |
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.
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申请公布号 |
US4224820(A) |
申请公布日期 |
1980.09.30 |
申请号 |
US19790014380 |
申请日期 |
1979.02.23 |
申请人 |
SITKEWICH, W. JORGE;ROTH, SANFORD |
发明人 |
SITKEWICH, W. JORGE;ROTH, SANFORD |
分类号 |
G01H3/06;G04D7/12;(IPC1-7):G04B17/00 |
主分类号 |
G01H3/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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