发明名称 |
System for signalling the termination of the lifetime of a battery for electronic timepieces |
摘要 |
A system for signalling the termination of the lifetime of a battery for an electronic timepiece is disclosed. The system includes a hand display device, an electro-optical display device, a battery voltage detecting circuit adapted to produce a signal when voltage of the battery lowers below a predetermined value, and means for modulating the time display pulse to be applied to one of the display devices in response to the signal generated in the battery voltage detecting circuit, thereby to modifying the time display for informing the end of the battery lifetime.
|
申请公布号 |
US4262349(A) |
申请公布日期 |
1981.04.14 |
申请号 |
US19780966063 |
申请日期 |
1978.12.04 |
申请人 |
CITIZEN WATCH CO., LTD. |
发明人 |
SEKIYA, FUKUO;YAMADA, TAKASHI;KUME, KAZUNARI |
分类号 |
G04C3/14;G04C10/04;(IPC1-7):G04B1/26;G04B25/00 |
主分类号 |
G04C3/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|