WARNING DEVICE

申请公布号：WO8501374(A1)

申请号：WO1984CH00139

申请日期：1984.09.03

申请公布日期：1985.03.28

申请人：

HEIDEMANN, VOLKER

发明人：HEIDEMANN, VOLKER;CARRARD, JEAN-DANIEL

分类号：G08B13/14;G08B13/20;(IPC1-7):G08B13/20

主分类号：G08B13/14

摘要：The warning device comprises a flexible member (3) in contact with an object or a place to be protected, said member being arranged so as to produce an air stream in an opening (5) having a very small diameter, of which the outlet communicates directly on a PTC or NTC resistance (6) of which the value changes when a small air stream passes through the opening (5), the magnitude variation of the resistance generating an output voltage variation which is then amplified to control an electronic servo-alarm or surveyance device arranged at the object to be protected or at a certain distance.

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