GB947977A - Improvements in or relating to warning systems - Google Patents

Improvements in or relating to warning systems

Info

Publication number
GB947977A
GB947977A GB1710762A GB1710762A GB947977A GB 947977 A GB947977 A GB 947977A GB 1710762 A GB1710762 A GB 1710762A GB 1710762 A GB1710762 A GB 1710762A GB 947977 A GB947977 A GB 947977A
Authority
GB
United Kingdom
Prior art keywords
output
luminous
fed
vibrations
alarm
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
GB1710762A
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.)
CGG SA
Original Assignee
Compagnie Generale de Geophysique SA
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 Compagnie Generale de Geophysique SA filed Critical Compagnie Generale de Geophysique SA
Publication of GB947977A publication Critical patent/GB947977A/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (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)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

947,977. Monitoring seismic vibrations. COMPAGNIE GENERALE DE GEOPHYSIQUE. May 3, 1962 [May 8, 1961], No. 17107/62. Heading H4D. [Also in Division G4] An intruder detection system comprises a number of geophones detecting any vibrations, the output of each of which is fed to an amplifier at a central station, the amplified voltage modulating an A.F. carrier supplied from a generator 5, all the signals being then added at 7 and fed to a loud - speaker 9. A number of luminous indicators 15, 17, 19, 21 are also provided, so connected by means of resistors 10. . . 13 and limiters 14, 16, 18, 20 to the output of modulator 4 and to each other that they will become luminous at different voltages, the number becoming luminous indicating the strength of the alarm signal and which channel is producing the alarm. The indicator may be gas discharge tubes or flashing lights, a transistor or valve multivibrator being included on the output side of each limiter in the latter case. Specification 942,848 is referred to.
GB1710762A 1961-05-08 1962-05-03 Improvements in or relating to warning systems Expired GB947977A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR861053A FR1296625A (en) 1961-05-08 1961-05-08 Improvements to electrical monitoring systems

Publications (1)

Publication Number Publication Date
GB947977A true GB947977A (en) 1964-01-29

Family

ID=8754657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1710762A Expired GB947977A (en) 1961-05-08 1962-05-03 Improvements in or relating to warning systems

Country Status (4)

Country Link
DE (1) DE1243565B (en)
FR (1) FR1296625A (en)
GB (1) GB947977A (en)
NL (2) NL278116A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119984A (en) * 1982-03-12 1983-11-23 Guglielmetti Electronique Infra-sonic detector and alarms including same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321737A (en) * 1965-02-03 1967-05-23 Russell Lindsay Sonar-type sensory aids

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE660328C (en) * 1930-04-09 1938-05-23 Siemens & Halske Akt Ges Device for checking the operating status of room, in particular safe security systems
CH293560A (en) * 1951-07-28 1953-09-30 Rolf Dr Glatt Installation for electrocardiography.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119984A (en) * 1982-03-12 1983-11-23 Guglielmetti Electronique Infra-sonic detector and alarms including same

Also Published As

Publication number Publication date
DE1243565B (en) 1967-06-29
NL278116A (en)
FR1296625A (en) 1962-06-22
NL132087C (en)

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