GB2085952A - Security curtain - Google Patents

Security curtain Download PDF

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Publication number
GB2085952A
GB2085952A GB8029471A GB8029471A GB2085952A GB 2085952 A GB2085952 A GB 2085952A GB 8029471 A GB8029471 A GB 8029471A GB 8029471 A GB8029471 A GB 8029471A GB 2085952 A GB2085952 A GB 2085952A
Authority
GB
United Kingdom
Prior art keywords
curtain
alarm
conductors
circuit
trigger
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
GB8029471A
Other versions
GB2085952B (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.)
Davco Instrumentation & Securi
Original Assignee
Davco Instrumentation & Securi
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 Davco Instrumentation & Securi filed Critical Davco Instrumentation & Securi
Priority to GB8029471A priority Critical patent/GB2085952B/en
Publication of GB2085952A publication Critical patent/GB2085952A/en
Application granted granted Critical
Publication of GB2085952B publication Critical patent/GB2085952B/en
Expired legal-status Critical Current

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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
    • B60R25/1001—Alarm systems associated with another car fitting or mechanism, e.g. door lock or knob, pedals

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Burglar Alarm Systems (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)

Abstract

A curtain suspended by runners on a rail, for closing a loading aperture in a side of a vehicle incorporates a flexible electrical conductor extending along a meandering path covering a major part of the surface of the curtain between the two ends of the curtain and at the or each movable end of the curtain the cable is connected by a jack and socket into a circuit of an alarm system. Cutting of one of the conductors will trigger the alarm by causing an open circuit while connecting two of them during a cutting operation will trigger the alarm by closing a normally-open circuit.

Description

SPECIFICATION Security curtain The present invention relates to curtains of the kind suspended from a rail, for example on runners, for closing an aperture for example a loading aperture in a side of a vehicle.
According to the present invention there is provided an alarm system and a curtain for closing an opening leading into an area to be protected by the alarm system, wherein the curtain incorporates a flexible electrical conductor extending between the two ends of the curtain and at the or each movable end of the curtain the conductor is connected into a circuit of the alarm system through a separa ble connection. Advantageously, the flexible conductor extends along a meandering path covering a major part of the surface of the curtain.
Preferably, there are three such conductors, insulated from each other, and forming a cable, the arrangement of the alarm circuit and cable being such that cutting of one of the conductors will trigger the alarm by causing an open circuit while connecting two of them during a cutting operation will trigger the alarm by closing a normally-open circuit.
With this arrangement, the seperable connection may comprise a conventional jack and socket connection, the socket being mounted on a frame around the opening to be closed by the curtain, the body ring and tip of the jack being connected to the three conductors.
The socket is preferably of the automatic switching type such that removal of the jack plug opens or closes the circuit which will trigger the alarm unless the alarm has been switched off by a key holder.
The conductor or conductors are preferably mounted on the side of the curtain facing into the space to be protected, being preferably in a sleeve or pocket which may be formed by securing a strip or strips of the same material as the curtain to it along the two edges of the strip or strips. The invention is particularly applicable to goods carrying vehicles of the curtain-sided type.
Clearly, a plurality of conductors can be arranged to run across the curtain, being connected in series or parallel depending on whether the particular alarm circuit is to respond to opening of a normally closed circuit or closing of a normally open circuit.
1. Apparatus comprising a curtain for closing an opening leading into an area to be protected by an alarm system, wherein the curtain incorporates a flexible electrical conductor extending between the two ends of the curtain and at the or each movable end of the curtain the conductor is connected into a circuit of the alarm system through a separable connection.
2. Apparatus according to claim 1 wherein the flexible conductor extends along a meandering path covering a major part of the surface of the curtain.
3. Apparatus according to claim 1 or 2 and including three such conductors, insulated from each other, and forming a cable, the arrangement of the alarm circuit and cable being such that cutting of one of the conductors will trigger the alarm by causing an open circuit while connecting two of them during a cutting operation will trigger the alarm by closing a normally-open circuit.
4. Apparatus according to claim 3 wherein the separable connection comprises a conventional jack and socket connection, the socket being mounted on a frame around the opening to be closed by the curtain, the body ring and tip of the jack being connected to the three conductors.
5. Apparatus according to claim 4 wherein the socket is of the automatic switching type such that removal of the jack plug opens or closes the circuit which will trigger the alarm unless the alarm has been switched off by a key holder.
6. Apparatus according to any of the preceding claims, wherein the conductor or conductors are mounted on the side of the curtain facing into the space to be protected.
7. A goods-carrying vehicle incorporating apparatus according to any of the preceding claims.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Security curtain The present invention relates to curtains of the kind suspended from a rail, for example on runners, for closing an aperture for example a loading aperture in a side of a vehicle. According to the present invention there is provided an alarm system and a curtain for closing an opening leading into an area to be protected by the alarm system, wherein the curtain incorporates a flexible electrical conductor extending between the two ends of the curtain and at the or each movable end of the curtain the conductor is connected into a circuit of the alarm system through a separa ble connection. Advantageously, the flexible conductor extends along a meandering path covering a major part of the surface of the curtain. Preferably, there are three such conductors, insulated from each other, and forming a cable, the arrangement of the alarm circuit and cable being such that cutting of one of the conductors will trigger the alarm by causing an open circuit while connecting two of them during a cutting operation will trigger the alarm by closing a normally-open circuit. With this arrangement, the seperable connection may comprise a conventional jack and socket connection, the socket being mounted on a frame around the opening to be closed by the curtain, the body ring and tip of the jack being connected to the three conductors. The socket is preferably of the automatic switching type such that removal of the jack plug opens or closes the circuit which will trigger the alarm unless the alarm has been switched off by a key holder. The conductor or conductors are preferably mounted on the side of the curtain facing into the space to be protected, being preferably in a sleeve or pocket which may be formed by securing a strip or strips of the same material as the curtain to it along the two edges of the strip or strips. The invention is particularly applicable to goods carrying vehicles of the curtain-sided type. Clearly, a plurality of conductors can be arranged to run across the curtain, being connected in series or parallel depending on whether the particular alarm circuit is to respond to opening of a normally closed circuit or closing of a normally open circuit. CLAIMS
1. Apparatus comprising a curtain for closing an opening leading into an area to be protected by an alarm system, wherein the curtain incorporates a flexible electrical conductor extending between the two ends of the curtain and at the or each movable end of the curtain the conductor is connected into a circuit of the alarm system through a separable connection.
2. Apparatus according to claim 1 wherein the flexible conductor extends along a meandering path covering a major part of the surface of the curtain.
3. Apparatus according to claim 1 or 2 and including three such conductors, insulated from each other, and forming a cable, the arrangement of the alarm circuit and cable being such that cutting of one of the conductors will trigger the alarm by causing an open circuit while connecting two of them during a cutting operation will trigger the alarm by closing a normally-open circuit.
4. Apparatus according to claim 3 wherein the separable connection comprises a conventional jack and socket connection, the socket being mounted on a frame around the opening to be closed by the curtain, the body ring and tip of the jack being connected to the three conductors.
5. Apparatus according to claim 4 wherein the socket is of the automatic switching type such that removal of the jack plug opens or closes the circuit which will trigger the alarm unless the alarm has been switched off by a key holder.
6. Apparatus according to any of the preceding claims, wherein the conductor or conductors are mounted on the side of the curtain facing into the space to be protected.
7. A goods-carrying vehicle incorporating apparatus according to any of the preceding claims.
GB8029471A 1980-09-11 1980-09-11 Security curtain Expired GB2085952B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8029471A GB2085952B (en) 1980-09-11 1980-09-11 Security curtain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8029471A GB2085952B (en) 1980-09-11 1980-09-11 Security curtain

Publications (2)

Publication Number Publication Date
GB2085952A true GB2085952A (en) 1982-05-06
GB2085952B GB2085952B (en) 1984-11-21

Family

ID=10516033

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8029471A Expired GB2085952B (en) 1980-09-11 1980-09-11 Security curtain

Country Status (1)

Country Link
GB (1) GB2085952B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162669A (en) * 1984-05-25 1986-02-05 Michael David Woods Improvements in or relating to alarm alert systems for buildings
GB2229564A (en) * 1989-02-21 1990-09-26 Leslie Hancock Security blind
GB2209618B (en) * 1986-05-03 1991-01-09 Adrian Francis Wolf Alarm system
GB2233804A (en) * 1986-05-03 1991-01-16 Adrian Francis Wolf Flexible closure alarm system
US5677674A (en) * 1992-04-30 1997-10-14 Cover Protection Limited Method of making a flexible closure incorporating an alarm system
GB2472904A (en) * 2009-08-20 2011-02-23 James Anthony Robert Hird System for detecting an attempt to gain unauthorized access through a side curtain of a trailer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162669A (en) * 1984-05-25 1986-02-05 Michael David Woods Improvements in or relating to alarm alert systems for buildings
GB2209618B (en) * 1986-05-03 1991-01-09 Adrian Francis Wolf Alarm system
GB2233804A (en) * 1986-05-03 1991-01-16 Adrian Francis Wolf Flexible closure alarm system
GB2233804B (en) * 1986-05-03 1991-04-03 Adrian Francis Wolf Vehicle alarm system
GB2229564A (en) * 1989-02-21 1990-09-26 Leslie Hancock Security blind
GB2229564B (en) * 1989-02-21 1993-08-04 Leslie Hancock Security blind
US5677674A (en) * 1992-04-30 1997-10-14 Cover Protection Limited Method of making a flexible closure incorporating an alarm system
GB2472904A (en) * 2009-08-20 2011-02-23 James Anthony Robert Hird System for detecting an attempt to gain unauthorized access through a side curtain of a trailer

Also Published As

Publication number Publication date
GB2085952B (en) 1984-11-21

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Legal Events

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