Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
  • G08B29/18—Prevention or correction of operating errors
  • G08B29/20—Calibration, including self-calibrating arrangements
  • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
  • G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
  • G01R17/06—Automatic balancing arrangements
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B13/00—Burglar, theft or intruder alarms
  • G08B13/22—Electrical actuation
  • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
  • G08B29/02—Monitoring continuously signalling or alarm systems
  • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
  • G08B29/08—Signalling of tampering with the line circuit

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Computer Security & Cryptography (AREA)
• Burglar Alarm Systems (AREA)
• Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
• Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
• Alarm Systems (AREA)
• Emergency Alarm Devices (AREA)
• Measurement Of Resistance Or Impedance (AREA)
• Air Bags (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=9215693

Family Applications (1)

Country Status (15)

Families Citing this family (7)

Family Cites Families (7)

• 1978
  • 1978-12-05 FR FR7834188A patent/FR2443683A1/fr active Granted
• 1979
  • 1979-11-27 ZA ZA00796442A patent/ZA796442B/xx unknown
  • 1979-11-28 ES ES486395A patent/ES486395A1/es not_active Expired
  • 1979-12-03 IN IN864/DEL/79A patent/IN153377B/en unknown
  • 1979-12-04 BR BR7907900A patent/BR7907900A/pt unknown
  • 1979-12-04 AU AU53440/79A patent/AU533426B2/en not_active Ceased
  • 1979-12-04 DD DD79217351A patent/DD147727A5/de unknown
  • 1979-12-04 EP EP79400958A patent/EP0012092B1/fr not_active Expired
  • 1979-12-04 AT AT79400958T patent/ATE4563T1/de not_active IP Right Cessation
  • 1979-12-04 CA CA341,169A patent/CA1130885A/en not_active Expired
  • 1979-12-04 DE DE7979400958T patent/DE2966121D1/de not_active Expired
  • 1979-12-04 MX MX180297A patent/MX147487A/es unknown
  • 1979-12-05 JP JP15869679A patent/JPS55123794A/ja active Pending
  • 1979-12-05 AR AR219170A patent/AR225906A1/es active
• 1981
  • 1981-12-08 US US06/328,646 patent/US4420745A/en not_active Expired - Fee Related

Also Published As

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