发明名称 |
Apparatus for checking a battery voltage |
摘要 |
An apparatus for checking the voltage of a power source battery in a photographic camera is disclosed. In simple form, this apparatus comprises first and second series circuits connected in parallel with each other to the battery, the first one of which has a luminous diode and a resistor, and the second one of which has two luminous diodes and a resistor, the characteristics of the luminous diodes and resistors being so selected that, when the actual voltage is dropped from a predetermined level, a difference between the brightnesses of the luminous diodes of the first and second circuits results to apprise the camera operator of the drop in battery voltage.
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申请公布号 |
US4163935(A) |
申请公布日期 |
1979.08.07 |
申请号 |
US19780878774 |
申请日期 |
1978.02.17 |
申请人 |
CANON K K |
发明人 |
ITO, FUMIO;ITO, TADASHI;MASHIMO, YUKIO;SAKURADA, NOBUAKI;SHINODA, NOBUHIKO |
分类号 |
G01R19/165;G01R31/36;G03B43/00;(IPC1-7):G01N27/42 |
主分类号 |
G01R19/165 |
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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