| 发明名称 |
APPARATUS FOR PROVIDING AN ENVIRONMENTAL ALARM INDICATION |
| 摘要 |
<p>A smoke detector receiving at two input terminals DC power from a remote source not only gives an alarm indication in response to a significant density of smoke, but senses the polarity of DC power at the terminals and generates a secondary signal, distinguishable from the alarm signal, when the polarity of power source is reversed.</p> |
| 申请公布号 |
GB2157871(A) |
申请公布日期 |
1985.10.30 |
| 申请号 |
GB19840024083 |
申请日期 |
1984.09.24 |
| 申请人 |
* AMERICAN DISTRICT TELEGRAPH COMPANY |
发明人 |
ANGELO A * MARSOCCI;WALTER F * SCHUCHARD |
| 分类号 |
G08B17/10;G08B23/00;(IPC1-7):G08B19/00 |
主分类号 |
G08B17/10 |
| 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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