发明名称 |
Electronic delay timer and alarm system |
摘要 |
A time delay and alarm system is provided to ensure safe operation of periodically activated apparatus having potentially dangerous moving parts. The system preferably employs a 555 type integrated timer circuit, a horn, and a pulse generator which causes the horn to produce a cyclical sound.
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申请公布号 |
US5165107(A) |
申请公布日期 |
1992.11.17 |
申请号 |
US19900548274 |
申请日期 |
1990.07.02 |
申请人 |
HAND, DOYLE W.;HOLT, THOMAS M. |
发明人 |
HAND, DOYLE W.;HOLT, THOMAS M. |
分类号 |
F16P3/00;G08B21/02;H02H11/00 |
主分类号 |
F16P3/00 |
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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