GB2233859A - Intruder alarms - Google Patents

Intruder alarms Download PDF

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Publication number
GB2233859A
GB2233859A GB8915914A GB8915914A GB2233859A GB 2233859 A GB2233859 A GB 2233859A GB 8915914 A GB8915914 A GB 8915914A GB 8915914 A GB8915914 A GB 8915914A GB 2233859 A GB2233859 A GB 2233859A
Authority
GB
United Kingdom
Prior art keywords
annunciator
intruder
unit
radio
premises
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.)
Withdrawn
Application number
GB8915914A
Other versions
GB8915914D0 (en
Inventor
Peter Hibbitt
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
Application filed by Individual filed Critical Individual
Priority to GB8915914A priority Critical patent/GB2233859A/en
Publication of GB8915914D0 publication Critical patent/GB8915914D0/en
Publication of GB2233859A publication Critical patent/GB2233859A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)

Abstract

An intruder alarm comprises a radio transmission arrangement including an intruder detector linked by radio with or without repeater units to at least one annunciator located in nearby premises. The annunciator includes a receiver responsive to an encoded radio signal transmitted by the intruder detector to provide an audible and/or visual indication. The annunciator units may be fixed or portable. <IMAGE>

Description

The Radio Linked Intrusion Alarm and Annunciator Apparatus The Invention This relates to set of units which together form an intruder alarm to operate between nearby properties.
There are currently available commercially, intruder alarms which give a visual and/or audible indication of intrusion into premises. This usage, which only gives the alarm indication at the actual premises entered, has an inherent weakness. The warning is non-specific and relies on a third party observing the warning signal and alerting the appropriate authorities, sometimes a long time after the warning has been initiated.
The object of the invention is to combine the use of an intruder alarm and a low power radio transmitter into one integrated unit with a radio receiver and annunciator into another integrated unit. The first (transmitting) unit is set up in the premises to be protected and is used in conjunction with the second (receiving) unit which may be located in a nearby premises. On detecting an intrusion into the protected premises the transmitting unit will transmit an encoded radio signal to be received and decoded by the associated receiving unit(s). On receiving such a signal the receiving unit(s) will announce the intrusion by audible and/or visual indicators.
The units may be fixed or portable and will be ideally suited for use by cooperating neighbours. Each unit will be battery powered, externally powered or externally powered with battery backup.
The transmitting unit will normally be set in one place for a Period of Operation. The exact position will be determined with reference to the specific layout of the premises to be protected. The receiving unit(s) may be moved from place to place during the Period of Operation and will remain active to receive a signal from the transmitting unit provided that they remain within range of the transmitted signal from the transmitting unit.
The range of communication between the transmitting and receiving units may be enhanced by the use of an additional repeater unit. This unit will receive the signal radiated by the transmitting unit and retransmit the information to the associated receiving unit(s).
Figure 1 is an outline sketch of the type of units envisaged, although the actual construction has not yet been finalised and may vary dependant on use. The invention will include a transmitting unit with a means of detecting an intruder and a receiving unit with means of announcing the intrusion. Both units include means of accepting power from an external source. The repeater unit is not shown on the sketch.

Claims (2)

  1. Claims
    An intruder detector and separate annunciator linked by radio, with or without the use of repeater units, for use in nearby premises.
    Amendments to the claims have been filed as follows 1. An intruder detection system, comprising a combined intrusion detector and low power radio transmitter unit and a combined radio receiver and annunciator unit, for use between neighbouring domestic premises.
  2. 2. A system according to claim 1 where the signals are relayed by one or more separate low power radio repeater units.
GB8915914A 1989-07-11 1989-07-11 Intruder alarms Withdrawn GB2233859A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8915914A GB2233859A (en) 1989-07-11 1989-07-11 Intruder alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8915914A GB2233859A (en) 1989-07-11 1989-07-11 Intruder alarms

Publications (2)

Publication Number Publication Date
GB8915914D0 GB8915914D0 (en) 1989-08-31
GB2233859A true GB2233859A (en) 1991-01-16

Family

ID=10659894

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8915914A Withdrawn GB2233859A (en) 1989-07-11 1989-07-11 Intruder alarms

Country Status (1)

Country Link
GB (1) GB2233859A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133251A (en) * 1982-12-02 1984-07-18 Racal Security Ltd Improvements in and relating to remote sensing systems
US4484183A (en) * 1980-10-20 1984-11-20 Morey Gilles M Method and system for detection of the presence, removal, or absence of a metal body
US4559526A (en) * 1982-06-29 1985-12-17 Secom Co., Ltd. Security alarm system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484183A (en) * 1980-10-20 1984-11-20 Morey Gilles M Method and system for detection of the presence, removal, or absence of a metal body
US4559526A (en) * 1982-06-29 1985-12-17 Secom Co., Ltd. Security alarm system
GB2133251A (en) * 1982-12-02 1984-07-18 Racal Security Ltd Improvements in and relating to remote sensing systems

Also Published As

Publication number Publication date
GB8915914D0 (en) 1989-08-31

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)