FR2341169A2 - Burglar alarm and detection system - detects change in air circulation duty to opening access way into room or building - Google Patents

Burglar alarm and detection system - detects change in air circulation duty to opening access way into room or building

Info

Publication number
FR2341169A2
FR2341169A2 FR7604374A FR7604374A FR2341169A2 FR 2341169 A2 FR2341169 A2 FR 2341169A2 FR 7604374 A FR7604374 A FR 7604374A FR 7604374 A FR7604374 A FR 7604374A FR 2341169 A2 FR2341169 A2 FR 2341169A2
Authority
FR
France
Prior art keywords
air circulation
change
access way
burglar alarm
building
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.)
Granted
Application number
FR7604374A
Other languages
French (fr)
Other versions
FR2341169B2 (en
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.)
Individual
Original Assignee
Individual
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
Priority claimed from FR7337525A external-priority patent/FR2248564A1/en
Priority claimed from FR7603243A external-priority patent/FR2339918A2/en
Application filed by Individual filed Critical Individual
Priority to FR7604374A priority Critical patent/FR2341169A2/en
Publication of FR2341169A2 publication Critical patent/FR2341169A2/en
Application granted granted Critical
Publication of FR2341169B2 publication Critical patent/FR2341169B2/fr
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05G—SAFES OR STRONG-ROOMS FOR VALUABLES; BANK PROTECTION DEVICES; SAFETY TRANSACTION PARTITIONS
    • E05G1/00—Safes or strong-rooms for valuables
    • E05G1/10—Safes or strong-rooms for valuables with alarm, signal or indicator
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/20—Actuation by change of fluid pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The burglar alarm system is for an enclosed space in which air circulates naturally or is forced by air conditioning. The system has a detector which is sensitive to a change in the air circulation or atmosphere of the space. This change being caused by opening an access way into the enclosed space. The sensor is, in response to the change, designed to actuate an alarm. The modification caused by the change is that of the force absorbed by a ventilator motor (7) creating, accelerating a braking air circulation. The sensor is for example a contact animater (6). The sensor also may be a galvanometer or voltimeter in a Wheatstone Bridge. The ventilator motor (7) is inserted in one arm of the bridge.
FR7604374A 1973-10-22 1976-02-11 Burglar alarm and detection system - detects change in air circulation duty to opening access way into room or building Granted FR2341169A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7604374A FR2341169A2 (en) 1973-10-22 1976-02-11 Burglar alarm and detection system - detects change in air circulation duty to opening access way into room or building

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR7337525A FR2248564A1 (en) 1973-10-22 1973-10-22 Intruder detection system for buildings - is responsive to air current caused when door or window is opened
FR7603243A FR2339918A2 (en) 1976-01-29 1976-01-29 Burglar detection system - monitors room air pressure or air circulation to detect forced entry
FR7604374A FR2341169A2 (en) 1973-10-22 1976-02-11 Burglar alarm and detection system - detects change in air circulation duty to opening access way into room or building

Publications (2)

Publication Number Publication Date
FR2341169A2 true FR2341169A2 (en) 1977-09-09
FR2341169B2 FR2341169B2 (en) 1978-12-29

Family

ID=9169236

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7604374A Granted FR2341169A2 (en) 1973-10-22 1976-02-11 Burglar alarm and detection system - detects change in air circulation duty to opening access way into room or building

Country Status (1)

Country Link
FR (1) FR2341169A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039142A2 (en) * 1980-04-01 1981-11-04 Alexander Thompson Mckinley Alarm system
CN114075910A (en) * 2021-11-26 2022-02-22 颜杰才 Intelligent safe security detection system based on Internet of things technology

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039142A2 (en) * 1980-04-01 1981-11-04 Alexander Thompson Mckinley Alarm system
EP0039142A3 (en) * 1980-04-01 1982-06-09 Alexander Thompson Mckinley Alarm system
CN114075910A (en) * 2021-11-26 2022-02-22 颜杰才 Intelligent safe security detection system based on Internet of things technology

Also Published As

Publication number Publication date
FR2341169B2 (en) 1978-12-29

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