发明名称 Accuracy correction in an electronic timepiece
摘要 A system for correcting the accuracy of a reference signal in an electronic timepiece comprises an electronic timepiece including a reference signal frequency correction means for increasing or decreasing the reference signal frequency in a digital fashion with the use of a low frequency signal, and a quartz tester arrangement for measuring the accuracy of the reference signal frequency. The quartz tester arrangement indicates the displacement of the reference signal frequency from the standard signal frequency with the use of five lamps, each of which is selected to be enabled in accordance with the detected value of the displacement. The reference signal frequency correction means in the electronic timepiece includes five manually operable switches corresponding to said five lamps and functions to increase or decrease the reference signal frequency in a digital fashion in response to the closing of the switches corresponding to the enabled lamps.
申请公布号 US4254494(A) 申请公布日期 1981.03.03
申请号 US19780888634 申请日期 1978.03.21
申请人 SHARP KABUSHIKI KAISHA 发明人 MAEDA, HIDETOSHI
分类号 G04G3/02;(IPC1-7):G04C9/00 主分类号 G04G3/02
代理机构 代理人
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