发明名称 |
Danger alarm system |
摘要 |
A danger alarm system has a plurality of alarm circuits which are operable to provide environmental signals concerning the area about the respective alarm circuits. The alarm circuits are connected to a central exchange by way of respective lines which are terminated in the exchange by respective alarm connection circuits. A write-read memory is provided for storing the busy state of the respective lines, and receives the busy state information via an input multiplexer which is connected to a line state multiplexer through a plurality of logic gates. A comparator gates through alarm and line interrupt signals for each line in response to such signals together with busy condition signals from the memory. An output multiplexer connects the comparator to respective output indicator circuits for alarm conditions and line interrupt conditions.
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申请公布号 |
US4286117(A) |
申请公布日期 |
1981.08.25 |
申请号 |
US19790029831 |
申请日期 |
1979.04.13 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
SCHREYER, KARLHEINZ;THILO, PEER |
分类号 |
G08B25/00;G08B17/00;G08B26/00;(IPC1-7):H04M11/04 |
主分类号 |
G08B25/00 |
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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