GB1529947A - Ultra-sonic intruder alarms - Google Patents

Ultra-sonic intruder alarms

Info

Publication number
GB1529947A
GB1529947A GB1462675A GB1462675A GB1529947A GB 1529947 A GB1529947 A GB 1529947A GB 1462675 A GB1462675 A GB 1462675A GB 1462675 A GB1462675 A GB 1462675A GB 1529947 A GB1529947 A GB 1529947A
Authority
GB
United Kingdom
Prior art keywords
circuit
detector
signal
detectors
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
GB1462675A
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.)
Munford & White Ltd
Original Assignee
Munford & White Ltd
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 Munford & White Ltd filed Critical Munford & White Ltd
Priority to GB1462675A priority Critical patent/GB1529947A/en
Publication of GB1529947A publication Critical patent/GB1529947A/en
Expired legal-status Critical Current

Links

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
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
    • 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
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

1529947 Ultrasonic intruder alarm system MUNFORD & WHITE Ltd 9 July 1976 [9 April 1975] 14626/75 Heading G4N An ultrasonic intruder alarm system includes a number of ultrasonic detectors 10 each connected to a control panel 1 for the transmission of an alarm signal 6 thereto and each having an individual latching circuit 11 and an individual indicator 13 operable to show the condition of the latching circuit, the system also comprising switching means operable to inhibit response of unlatched detectors to an alarm condition while leaving in its unlatched condition any detector which had not already latched at the time of operation of the switching means. As described the control panel is connected to the detectors by common lines 4-7. Wire 5 carves a signal from an oscillator 8 via a gate 9 to detectors 10 and lamp control circuits 12. Operation of a detector 10 unbalances a resistive bridge 14-17 to operate a detection circuit 18. When the system is set up, switches 20 and 21 (located near the exit) are in their INITIAL SET and OFF positions respectively: operation of a detector 10 causes a signal from circuit 18 to pass to an unlatching circuit 22 which after a few seconds unlatches the operated detector via line 4. An audio test indicator 23 and the corresponding lamp 11 are also operated. In use, switch 21 is moved to its FINAL SET position: now the signal from circuit 18 passes to a panel latch circuit 24 which blocks gate 9 (so that the operation of further detectors is inhibited), inhibits circuit 22, operates bells and dials an alarm signal. A D.C. signal is also applied from a circuit 27 to inhibit the lamp 11 at the operated detector. Unlatching of the latched detector is effected by means of a further switch 25. Gate 9 may be replaced by a manually operable switch. The system may be set to an unlatched condition by means of switches at the control panel or exit for a timed period to enable an operator to enter and leave without setting off an alarm. A low-level audio tone may be generated during this period. CMOS logic maybe used.
GB1462675A 1976-07-09 1976-07-09 Ultra-sonic intruder alarms Expired GB1529947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1462675A GB1529947A (en) 1976-07-09 1976-07-09 Ultra-sonic intruder alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1462675A GB1529947A (en) 1976-07-09 1976-07-09 Ultra-sonic intruder alarms

Publications (1)

Publication Number Publication Date
GB1529947A true GB1529947A (en) 1978-10-25

Family

ID=10044668

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1462675A Expired GB1529947A (en) 1976-07-09 1976-07-09 Ultra-sonic intruder alarms

Country Status (1)

Country Link
GB (1) GB1529947A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027139A1 (en) * 1979-04-16 1981-04-22 Pittway Corporation Intrusion alarm system
EP0063876A1 (en) * 1981-04-16 1982-11-03 EMI Limited Alarm system and a sensor module therefor
EP0121048A1 (en) * 1983-03-04 1984-10-10 Cerberus Ag Circuit arrangement for the interference level control of detectors, arranged in a danger detection device
GB2161634A (en) * 1984-05-25 1986-01-15 Toshiba Kk Arming and disarming alarm systems
EP2127966A1 (en) * 2008-05-30 2009-12-02 Delphi Technologies, Inc. Method and system for passenger compartment monitoring

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027139A1 (en) * 1979-04-16 1981-04-22 Pittway Corporation Intrusion alarm system
EP0027139A4 (en) * 1979-04-16 1981-11-25 Pittway Corp Intrusion alarm system.
EP0063876A1 (en) * 1981-04-16 1982-11-03 EMI Limited Alarm system and a sensor module therefor
EP0121048A1 (en) * 1983-03-04 1984-10-10 Cerberus Ag Circuit arrangement for the interference level control of detectors, arranged in a danger detection device
US4598271A (en) * 1983-03-04 1986-07-01 Cerberus Ag Circuit arrangement for monitoring noise levels of detectors arranged in an alarm installation
GB2161634A (en) * 1984-05-25 1986-01-15 Toshiba Kk Arming and disarming alarm systems
US4683460A (en) * 1984-05-25 1987-07-28 Kabushiki Kaisha Toshiba Intrusion alarm system with automatic exit control and misset indicator
EP2127966A1 (en) * 2008-05-30 2009-12-02 Delphi Technologies, Inc. Method and system for passenger compartment monitoring

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Legal Events

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