WO1982001781A1 - Security alarm systems - Google Patents

Security alarm systems Download PDF

Info

Publication number
WO1982001781A1
WO1982001781A1 PCT/GB1981/000242 GB8100242W WO8201781A1 WO 1982001781 A1 WO1982001781 A1 WO 1982001781A1 GB 8100242 W GB8100242 W GB 8100242W WO 8201781 A1 WO8201781 A1 WO 8201781A1
Authority
WO
WIPO (PCT)
Prior art keywords
auxiliary
warning device
relay
main
audible warning
Prior art date
Application number
PCT/GB1981/000242
Other languages
French (fr)
Inventor
John Nipper
Original Assignee
John Nipper
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 John Nipper filed Critical John Nipper
Publication of WO1982001781A1 publication Critical patent/WO1982001781A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
    • B60R25/104—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device characterised by the type of theft warning signal, e.g. visual or audible signals with special characteristics
    • 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
    • G08B29/16—Security signalling or alarm systems, e.g. redundant systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R2325/00—Indexing scheme relating to vehicle anti-theft devices
    • B60R2325/30—Vehicles applying the vehicle anti-theft devices
    • B60R2325/304—Boats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
    • B60R25/1018—Alarm systems characterised by features related to the general power supply

Definitions

  • This invention relates to security alarm systems, and has particular, but not exclusive, application to vehicle theft alarm systems.
  • a security alarm system in accordance with the invention comprises a main alarm circuit, a main audible warning device operable under the c ontrol of said main alarm circuit, an auxiliary audible warning device and control means sensitive to disconnection of the main alarm circuit for operating said auxiliary audible warning device.
  • the auxiliary audible warning device, the control means, and an auxiliary battery for audible warning device are contained in a housing and are connected to the main alarm circuit by a wire, the control means being such that the auxiliary audible warning device is operated if such wire is severed.
  • the auxiliary battery may be connected to the vehicle main battery via a relay which is controlled by the vehicle ignition switch so that the auxiliary battery is maintained charged when the ignition switch is closed, but is isolated therefrom when the ignition is off, thereby preventing discharge of the main battery by the auxiliary audible warning device.
  • the control means preferably comprises a first relay having its winding connected to the supply terminal of the main alarm circuit, and a second relay controlled by a contact of the first relay and controlling connection of the auxiliary audible warning device across the auxiliary battery, the two relays being normally energised by virtue of their connection to the main alarm circuit.
  • a main alarm circuit 10 is contained within an enclosure 11 and has connections which are known per se to a key-switch 12, a series of trip-switches or vibration sensitive switches 13, to a contact of the vehicle ignition switch 14, to the vehicle battery 15 and the vehicle earth and to a main audible warning device 16.
  • the circuit 10 (when armed) operates in a manner also known per se to detect closing of any of the switches 13 or by so-called earth-drop detection: the energisation of any vehicle load and to sound the device lo for a period following such detection. By using earth-drop detection, the circuit may be made sufficiently sensitive to detect the connection of any additional load to the vehicle electrical system.
  • the system shown in the drawing also includes an auxiliary audible warning device 20 contained in a separate enclosure 21 which also, houses an auxiliary batter 22 and two relays 23, 24 controlling the auxiliary audible warning device 20.
  • One such relay 23 has a single normally closed contact 23a and has one end of its windni g connected by a wire 23 to the main battery input to the main alarm circuit 10, such wire being connected to the circuit 10 inside the enclosure 11.
  • the other end of the winding of relay 23 is connected to the earthed terminal of the main warning device 16.
  • a fuse 26 inside the enclosure 21 connects the wire 25 to the winding of relay 23.
  • the winding of relay 24 is connected between the fuse 26 and the vehicle earth.
  • the contact 23a is connected in series with a manual switch 27 across the winding 24 and the normally closed contact 24a of relay 24 connects one terminal of the device 20 to the auxiliary battery ⁇ ve terminal, the other terminal of the device 20 and the -ve terminal of battery 22 being connected to the vehicle earth.
  • Both relays 23 and 24 are normally energised so that contacts 23a and 24a are open. Contact 23a closes if relay 23 is de-energised by disconnection of the main warning device 16 from earth or by disconnection of the main supply lead to the main alarm. In either case relay 24 is also de-energised causing the device 20 to be connected across the auxiliary battery 22. It will be noted that if the wire 25 is disconnec ted or if either terminal of the main vehicle battery 15 is disconnected rail 23 will be de-energised. If these connections are now re-established the fuse 26 will blow since ontact 23a and switch 27 in series provide a short circuit to earth. The fuse 26 will also blow if the earth connection of the device l6 is severed. In either case resetting of the auxiliary alarm can only be effected by opening switch 27 and then replacing the fuse 26.
  • an additional relay 30 which has its winding connected between the vehicle ignition switch and the vehicle earth so that relay 30 is energised whenever the ignition is on.
  • the normally open contact of the relay interconnects the positive terminals of the two batteries so that these are in parallel when the ignition is on, but isolated from one another when the ignition is off. Setting off of the auxiliary warning device 21 will thus not drain the main battery when the ignition is off.
  • the end of relay 24 shown earthed is connected by a fly lead to a radio or any other accessory in the vehicle which requires protection against theft, such accessory providing the connection of this fly lead to earth. Removal of the fly lead or disconnection of the accessory will cause de-energisation of relay 24 so that warning device 21 is operated.
  • the lead from the relay 23 to the warning device 16 may be connected to a second earthed accessory instead of to the warning device 16. Disconnection of this second earthed accessory would likewise cause device 21 to be energised.

Abstract

A security alarm system includes a main alarm system (11), a main audible warning device (12) connected to said main alarm system, an auxiliary audible warning device (20) and a control means (23, 24) sensitive to disconnection of the main alarm circuit for operating the auxiliary audible warning device The auxiliary audible warning device, the control means and an auxiliary battery (22) are contained in a housing (21) and a wire connects the control means to a supply terminal of the main alarm system (11) such that the auxiliary audible warning means is energised by the auxiliary battery if this wire is severed.

Description

SECURITY ALARM SYSTEMS
This invention relates to security alarm systems, and has particular, but not exclusive, application to vehicle theft alarm systems.
Background Art
It has already been proposed to provide an alarm system which, when armed, detects various signals resulting from an intruder opening doors, or, in a vehicle system, switching on the vehicle ignition or other accessories or tampering with the wiring of the vehicle. Such systems suffer from the disadvantage, however, that they can be silenced merely by disconnecting the horn, siren or other audible alarm device, or disconnecting the alarm circuit from the vehicle battery.
It is an object of the present invention to provide a security alarm system in which this disadvantage is obviated.
Disclosure of invention
A security alarm system in accordance with the invention comprises a main alarm circuit, a main audible warning device operable under the c ontrol of said main alarm circuit, an auxiliary audible warning device and control means sensitive to disconnection of the main alarm circuit for operating said auxiliary audible warning device.
Preferably the auxiliary audible warning device, the control means, and an auxiliary battery for audible warning device are contained in a housing and are connected to the main alarm circuit by a wire, the control means being such that the auxiliary audible warning device is operated if such wire is severed. In a vehicle system, the auxiliary battery may be connected to the vehicle main battery via a relay which is controlled by the vehicle ignition switch so that the auxiliary battery is maintained charged when the ignition switch is closed, but is isolated therefrom when the ignition is off, thereby preventing discharge of the main battery by the auxiliary audible warning device.
The control means preferably comprises a first relay having its winding connected to the supply terminal of the main alarm circuit, and a second relay controlled by a contact of the first relay and controlling connection of the auxiliary audible warning device across the auxiliary battery, the two relays being normally energised by virtue of their connection to the main alarm circuit.
Brief description of drawings
An example of the invention is shown in the accompanying drawing which is a schematic circuit diagram of the alarm system, as applied to a vehicle theft alarm system.
Best mode of carrying out the invention
A main alarm circuit 10 is contained within an enclosure 11 and has connections which are known per se to a key-switch 12, a series of trip-switches or vibration sensitive switches 13, to a contact of the vehicle ignition switch 14, to the vehicle battery 15 and the vehicle earth and to a main audible warning device 16. The circuit 10 (when armed) operates in a manner also known per se to detect closing of any of the switches 13 or by so-called earth-drop detection: the energisation of any vehicle load and to sound the device lo for a period following such detection. By using earth-drop detection, the circuit may be made sufficiently sensitive to detect the connection of any additional load to the vehicle electrical system. Various delays are provided to enable the driver to leave the vehicle after arming the circuit and to disarm the circuit after entering the vehicle, the latter such delay being overridden by the key-switch 12. Since all these basic functions of the alarm circuit are known in the art no detailed description of the main alarm circuit need be given herein.
The system shown in the drawing also includes an auxiliary audible warning device 20 contained in a separate enclosure 21 which also, houses an auxiliary batter 22 and two relays 23, 24 controlling the auxiliary audible warning device 20. One such relay 23 has a single normally closed contact 23a and has one end of its windni g connected by a wire 23 to the main battery input to the main alarm circuit 10, such wire being connected to the circuit 10 inside the enclosure 11. The other end of the winding of relay 23 is connected to the earthed terminal of the main warning device 16. A fuse 26 inside the enclosure 21 connects the wire 25 to the winding of relay 23. The winding of relay 24 is connected between the fuse 26 and the vehicle earth. The contact 23a is connected in series with a manual switch 27 across the winding 24 and the normally closed contact 24a of relay 24 connects one terminal of the device 20 to the auxiliary battery ÷ve terminal, the other terminal of the device 20 and the -ve terminal of battery 22 being connected to the vehicle earth.
Both relays 23 and 24 are normally energised so that contacts 23a and 24a are open. Contact 23a closes if relay 23 is de-energised by disconnection of the main warning device 16 from earth or by disconnection of the main supply lead to the main alarm. In either case relay 24 is also de-energised causing the device 20 to be connected across the auxiliary battery 22. It will be noted that if the wire 25 is disconnec ted or if either terminal of the main vehicle battery 15 is disconnected rail 23 will be de-energised. If these connections are now re-established the fuse 26 will blow since ontact 23a and switch 27 in series provide a short circuit to earth. The fuse 26 will also blow if the earth connection of the device l6 is severed. In either case resetting of the auxiliary alarm can only be effected by opening switch 27 and then replacing the fuse 26.
To maintain the battery 22 charged, there is provided an additional relay 30 which has its winding connected between the vehicle ignition switch and the vehicle earth so that relay 30 is energised whenever the ignition is on. The normally open contact of the relay interconnects the positive terminals of the two batteries so that these are in parallel when the ignition is on, but isolated from one another when the ignition is off. Setting off of the auxiliary warning device 21 will thus not drain the main battery when the ignition is off.
Alttough an example of the invention has been described above as applied to a vehicle theft alarm system, the invention can also be applied to intruder alarm systems for boats, caravans, houses and other property. Aithough. "earth-drop" detector systems are preferred, the invention may also be applied to system in which the main alarm circuit makes use of other methods of detection.
In a modification of the system described above the end of relay 24 shown earthed, is connected by a fly lead to a radio or any other accessory in the vehicle which requires protection against theft, such accessory providing the connection of this fly lead to earth. Removal of the fly lead or disconnection of the accessory will cause de-energisation of relay 24 so that warning device 21 is operated. Where there are two accessories which require independent protection, the lead from the relay 23 to the warning device 16 may be connected to a second earthed accessory instead of to the warning device 16. Disconnection of this second earthed accessory would likewise cause device 21 to be energised.

Claims

Claims :
1. A security alarm system comprising a main alarm system, a main audible warning device operable under the control of said main alarm circuit, an auxiliary audible warning device and control means sensitive to disconnection of the main alarm circuit for operating said auxiliary audible warning device.
2. A system as claimed in Claim 1 in which the auxiliary audible warning device, the control means, and an auxiliary bai:tery for the auxiliary audible warning device are contained in a housing and are connected to the main alarm circuit by a wire, the control means being such that the auxiliary audible warning device is operated if such wire is severed.
3. A system as claimed in Claim 2 forming part of a vehicular system in a vehicle having a main battery and an ignition switch, the auxiliary battery being connected to the main battery via a relay which is controlled by the vehicle ignition switch so that the auxiliary battery is maintained charged when the ignition switch is closed, but is isolated therefrom when the ignition is off, thereby preventing discharge of the main battery by the auxiliary audib1e warning device. 4. A system as claimed in any preceding claim in which said control means comprises a first, relay having its winding connected to the supply terminal of the main alarm circuit and a second relay controlled by a contact of the first relay and contr-oliing connection of the auxiliary audible warning device across the auxiliary battery, the two relays being normally energised by virtue of their connection to the main alarm circuit.
5. A system as claimed in Claim 4 in which said first relay wiring is connected between the supply terminal of the main alarm circuit and a grounded terrainal of the audiliary audible warning device.
6. A system as claimed in Claim 4 in which the first relay winding is connected between the supply terminal of the main alarm circuit and an accessory device wh ich is grounded.
7. A system as claimed in Claim 5 or Claim 6 in which the second relay winding is connected between the supply terminal of the main alarm system and ground via a fuse, the first relay having a normally open contact connected in paraj.lal with said second relay winding whereby the first is blown when the first relay is de-energised.
3. A system as claimed in Claim 7 in which said second relay winding is earthed via a wire connected to an accessory device so that the auxiliary audible warning device is energised, if said accessory device is disconnected from earth.
PCT/GB1981/000242 1980-11-14 1981-11-13 Security alarm systems WO1982001781A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8036712 1980-11-14
GB8036712801114 1980-11-14

Publications (1)

Publication Number Publication Date
WO1982001781A1 true WO1982001781A1 (en) 1982-05-27

Family

ID=10517324

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1981/000242 WO1982001781A1 (en) 1980-11-14 1981-11-13 Security alarm systems

Country Status (2)

Country Link
EP (1) EP0064525A1 (en)
WO (1) WO1982001781A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529152A1 (en) * 1982-04-27 1983-12-30 Gutierrez Carlos ANTITHEFT AND RECOVERY SYSTEM FOR VEHICLES
FR2635396A1 (en) * 1988-08-09 1990-02-16 Texton METHOD FOR AUTOMATICALLY RELEASING AN ALARM, IN PARTICULAR FOR A MOTOR VEHICLE AND SYSTEM FOR IMPLEMENTING SAID METHOD
GB2197739B (en) * 1986-09-22 1990-08-15 Sharp Kk Failure alarm device
FR2694531A1 (en) * 1992-08-07 1994-02-11 Saigot Alain Audible and visual automobile alarm - has central electronic unit designed to receive pulse trains in two directions
EP1093983A2 (en) 1999-10-19 2001-04-25 Bayerische Motoren Werke Aktiengesellschaft Vehicle alarm installation and operation method
CN101890937A (en) * 2010-07-19 2010-11-24 马恩奇 Simple type vehicle accumulator anti-theft device
CN103879377A (en) * 2014-03-11 2014-06-25 马恩奇 Large truck tyre anti-theft alerter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108413863B (en) * 2018-04-24 2019-03-01 苏州博宇科技有限公司 A kind of verticality inspection tooling

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB983858A (en) * 1960-07-11 1965-02-17 Gasaccumulator Svenska Ab An improved electrical signalling circuit
DE1231597B (en) * 1966-03-04 1966-12-29 Telefonbau Circuit arrangement for sending an alarm to several groups of alarm receivers
DE2454254B1 (en) * 1974-11-15 1976-02-05 Jank Wilhelm Circuit arrangement for monitoring lines for short circuits and interruptions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB983858A (en) * 1960-07-11 1965-02-17 Gasaccumulator Svenska Ab An improved electrical signalling circuit
DE1231597B (en) * 1966-03-04 1966-12-29 Telefonbau Circuit arrangement for sending an alarm to several groups of alarm receivers
DE2454254B1 (en) * 1974-11-15 1976-02-05 Jank Wilhelm Circuit arrangement for monitoring lines for short circuits and interruptions

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529152A1 (en) * 1982-04-27 1983-12-30 Gutierrez Carlos ANTITHEFT AND RECOVERY SYSTEM FOR VEHICLES
GB2197739B (en) * 1986-09-22 1990-08-15 Sharp Kk Failure alarm device
FR2635396A1 (en) * 1988-08-09 1990-02-16 Texton METHOD FOR AUTOMATICALLY RELEASING AN ALARM, IN PARTICULAR FOR A MOTOR VEHICLE AND SYSTEM FOR IMPLEMENTING SAID METHOD
EP0358544A2 (en) * 1988-08-09 1990-03-14 Sté TEXTON Method and device for automatically activating the alarm system, in particular for an automobile
EP0358544A3 (en) * 1988-08-09 1990-03-28 Sté TEXTON Method and device for automatically activating the alarm system, in particular for an automobile
FR2694531A1 (en) * 1992-08-07 1994-02-11 Saigot Alain Audible and visual automobile alarm - has central electronic unit designed to receive pulse trains in two directions
EP1093983A2 (en) 1999-10-19 2001-04-25 Bayerische Motoren Werke Aktiengesellschaft Vehicle alarm installation and operation method
DE19950200C5 (en) * 1999-10-19 2008-04-17 Bayerische Motoren Werke Ag Automotive alarm system and method for operating such
EP1093983B2 (en) † 1999-10-19 2009-03-11 Bayerische Motoren Werke Aktiengesellschaft Vehicle alarm installation and operation method
CN101890937A (en) * 2010-07-19 2010-11-24 马恩奇 Simple type vehicle accumulator anti-theft device
CN103879377A (en) * 2014-03-11 2014-06-25 马恩奇 Large truck tyre anti-theft alerter

Also Published As

Publication number Publication date
EP0064525A1 (en) 1982-11-17

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