发明名称 |
Alarm-triggering device and apparatus operating without installation |
摘要 |
The invention describes a device and apparatus for the purpose of acoustically controlled alarm triggering, for the purpose of avoiding any sort of installation. Use is made as alarm-triggering event of acoustic events whose harmonics are situated in the ultrasonic range, in particular glass breakage, tool clattering, cracking and scraping.
|
申请公布号 |
DE3504552(A1) |
申请公布日期 |
1986.08.14 |
申请号 |
DE19853504552 |
申请日期 |
1985.02.11 |
申请人 |
WURM,FRITZ |
发明人 |
WURM,FRITZ;SANDKER,HEINZ-GERD |
分类号 |
G08B13/16;(IPC1-7):G08B13/16;G08B13/04 |
主分类号 |
G08B13/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|