Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1989-06-28
1991-06-04
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
340522, 340566, G08B 1320
Patent
active
050217666
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.
REFERENCES:
patent: 3438021 (1969-04-01), Nelkin et al.
patent: 3611341 (1971-10-01), Craig et al.
patent: 3831162 (1974-08-01), Armstrong
patent: 3965751 (1976-06-01), Harvalik
patent: 4400695 (1983-08-01), Rittenbach et al.
patent: 4450434 (1984-05-01), Nielsen et al.
patent: 4538140 (1985-08-01), Prestel
patent: 4591709 (1986-05-01), Koechner et al.
patent: 4746910 (1988-05-01), Pfister et al.
"Chapter Ten: Detection of Radar Signals in Noise", Introduction to Radar Systems 2nd ed., Merrill I. Skolnik, McGraw Hill Book Co.
Genahr Rudolf
Mahler Hansjurg
Cerberus AG
Mullen Jr. Thomas J.
Swann III Glen R.
LandOfFree
Intrusion detection system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Intrusion detection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intrusion detection system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1029267