发明名称 |
Tactile alarm system for gaining the attention of an individual |
摘要 |
In an alarm system for gaining the attention of an individual requiring neither sound nor light for its operation, a transmitter unit is activated to send a signal at a predetermined frequency into an induction loop to be received by a receiver unit worn on the person of the individual whose attention it is intended to gain. The transmitter unit sends its signal for at least a predetermined period and the receiver unit responds by activating a mechanical agitator of selectable frequency and amplitude to cause bodily displacement of the receiver unit in a cyclic, periodic manner.
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申请公布号 |
US4731603(A) |
申请公布日期 |
1988.03.15 |
申请号 |
US19860864534 |
申请日期 |
1986.05.19 |
申请人 |
UNISYS CORPORATION |
发明人 |
MCRAE, ELIZABETH;MCKENZIE, CAMERON |
分类号 |
G08B6/00;G09B21/00;(IPC1-7):G08B5/22 |
主分类号 |
G08B6/00 |
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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