GB1391697A - Security system for detecting intrusions in an enclosure - Google Patents

Security system for detecting intrusions in an enclosure

Info

Publication number
GB1391697A
GB1391697A GB1524972A GB1524972A GB1391697A GB 1391697 A GB1391697 A GB 1391697A GB 1524972 A GB1524972 A GB 1524972A GB 1524972 A GB1524972 A GB 1524972A GB 1391697 A GB1391697 A GB 1391697A
Authority
GB
United Kingdom
Prior art keywords
line
amplifier
april
zener diode
transmission line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1524972A
Other languages
English (en)
Inventor
D M P Lecuyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FRANCAIS DETECTION ELETR
La Detection Electronique Francaise
Original Assignee
FRANCAIS DETECTION ELETR
La Detection Electronique Francaise
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FRANCAIS DETECTION ELETR, La Detection Electronique Francaise filed Critical FRANCAIS DETECTION ELETR
Publication of GB1391697A publication Critical patent/GB1391697A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1663—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using seismic sensing means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Burglar Alarm Systems (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)
GB1524972A 1971-04-07 1972-04-04 Security system for detecting intrusions in an enclosure Expired GB1391697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7112290A FR2133079A5 (cg-RX-API-DMAC7.html) 1971-04-07 1971-04-07

Publications (1)

Publication Number Publication Date
GB1391697A true GB1391697A (en) 1975-04-23

Family

ID=9074910

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1524972A Expired GB1391697A (en) 1971-04-07 1972-04-04 Security system for detecting intrusions in an enclosure

Country Status (12)

Country Link
BE (1) BE781767A (cg-RX-API-DMAC7.html)
CA (1) CA970869A (cg-RX-API-DMAC7.html)
CH (1) CH556071A (cg-RX-API-DMAC7.html)
DE (1) DE2216319C3 (cg-RX-API-DMAC7.html)
ES (1) ES401536A1 (cg-RX-API-DMAC7.html)
FR (1) FR2133079A5 (cg-RX-API-DMAC7.html)
GB (1) GB1391697A (cg-RX-API-DMAC7.html)
IT (1) IT950969B (cg-RX-API-DMAC7.html)
LU (1) LU65112A1 (cg-RX-API-DMAC7.html)
NL (1) NL7204620A (cg-RX-API-DMAC7.html)
OA (1) OA03991A (cg-RX-API-DMAC7.html)
SE (1) SE373220B (cg-RX-API-DMAC7.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4760295A (en) * 1985-04-17 1988-07-26 Geoquip Security Systems Ltd. Vibration-sensitive transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4760295A (en) * 1985-04-17 1988-07-26 Geoquip Security Systems Ltd. Vibration-sensitive transducer

Also Published As

Publication number Publication date
CH556071A (fr) 1974-11-15
FR2133079A5 (cg-RX-API-DMAC7.html) 1972-11-24
NL7204620A (cg-RX-API-DMAC7.html) 1972-10-10
DE2216319C3 (de) 1979-05-31
BE781767A (fr) 1972-10-06
DE2216319B2 (de) 1978-10-12
DE2216319A1 (de) 1972-10-12
CA970869A (en) 1975-07-08
OA03991A (fr) 1979-09-15
ES401536A1 (es) 1975-02-16
SE373220B (cg-RX-API-DMAC7.html) 1975-01-27
LU65112A1 (cg-RX-API-DMAC7.html) 1972-12-07
IT950969B (it) 1973-06-20

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee