The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 1991
Filed:
Jun. 28, 1989
Rudolf Genahr, Mannedorf, CH;
Hansjurg Mahler, Hombrechtikon, CH;
Cerberus AG, , CH;
Abstract
A pressure sensitive perimeter intrusion detector comprises at least two pressure sensitive housing members adapted for the transmission of acoustic waves in response to pressure applied to the exterior of the housing members. Each housing member is capable of providing a first electric signal in response to seismic waves or ground vibrations. In addition, distributed along the housing members are pressure-sensing elements for detecting pressure applied along the housing members. These pressure-sensing elements for each housing member provide a second electric signal having substantially no time delay. The first and second electric signals are transmitted to an evaluation circuit adapted to produce an alarm signal in response to the detection of an intrusion occurrence.