EP0087076A1 - Grate with incorporated alarm system - Google Patents
Grate with incorporated alarm system Download PDFInfo
- Publication number
- EP0087076A1 EP0087076A1 EP83101279A EP83101279A EP0087076A1 EP 0087076 A1 EP0087076 A1 EP 0087076A1 EP 83101279 A EP83101279 A EP 83101279A EP 83101279 A EP83101279 A EP 83101279A EP 0087076 A1 EP0087076 A1 EP 0087076A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grate
- conductors
- circuit
- alarm
- resistance
- 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
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
- G08B13/126—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a housing, e.g. a box, a safe, or a room
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/01—Grilles fixed to walls, doors, or windows; Grilles moving with doors or windows; Walls formed as grilles, e.g. claustra
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Burglar Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
- Incineration Of Waste (AREA)
Abstract
Description
- The present invention realizes a metal grate, usually made of steel, which contains a series of incorporated devices, which, in the case of tampering, will activate the alarm system which is connected to them.
- One is reminded that grates usually built of steel and in different shapes are barriers which are secured in the openings of the walls, such as windows, or transition areas between one room and the next, in order to permanently prevent people from entering into reserved or forbidden rooms, or, as in the case of jails, in order to prevent escapes through the openings which are protected by these grates.
- The grates are firmly secured in the walls by means of cementing or by means of similar systems and they constitute in themselves a barrier of the passive type, that is, they oppose their structure and their type of anchorage to possible tamperings or to attempted force.
- On the contrary, the present invention realizes a grate, which, besides being a barrier of the passive type, is also an active means which prevents, because of its constitution, any type of tampering, whether represented by the cutting of the bars, which constitute it, by their being forced apart, or by the tearing of the grate away from the anchoring wall.
- This goal is achieved by the realization of a grate, constituted by tubes or by structural shapes, made of steel or of similar material, which are hollow inside and in which is located a network of electrical wires with a significant electrical resistance, forming one or more circuits, which are connected to an alarm station through the interposition of an appropriate balancing circuit, which intercepts any resistance variation occurring in the circuit. In actuality one. or more pairs of highly-resistant, insulated electrical wires are introduced into the hollow structure of the grate and they are even made to go through several times along all the longitudinal and the transversal sections of the grate itself, including the anchorage sections which secure the grate to the wall or to the frame supporting the grate. Each pair of wires is electrically connected on one side with an end-of-the-line resistance, which is located, for example, in an anchorage and, on the other side, with a balancing electronic circuit which, as has been said, intercepts any variation of resistance in the circuit. Therefore, whenever there is a tampering in any point of the grate - which may consist in the sawing of the bars, in the drilling, in the flame cutting, in the tearing from the wall or from the anchoring frame, in the forcing apart - a variation of resistance occurs, which may be due, for example, to a short circuit or an interruption of the circuit: this variation, intercepted by a balancing circuit of the resistance,which is applied to it, will cause in the circuit itself the opening of a relay which is connected to the burglar- alarm station and, therefore, will activate the alarm.
- In order to increase the reliability of the functioning of the grate circuits, it was deemed advisable to introduce into it at least two circuits, one independent from the other, with equivalent functions and based on the same functional principle and on the same construction method. Particular attention has been paid to the solution of the problem concerning the tearing of the grate, that is, to the complete removal of the same from the anchoring wall or frame. For this reason at least one pair of anchorages and a pivot, preferably in a diagonal position, which goes completely through the wall and is anchored by means of an iron loop or cross on the other side of the grate, have been introduced. The head of this pivot is provided with a loop, through which the wires of the electrical circuit or circuits are strung, so that a possible removal from the wall of the anchorage in which the pivot is inserted will also cause the tearing of the elecrical circuit, with the ensuing activation of the alarm.
- Another interesting aspect of the grate being discussed is that, because of the way in which it activates the alarm, false alarms due to accidental causes are practically impossible; in fact, if there is no alteration of the electrical circuit in the grate, caused by the above-described causes, there will be no alarm.
- These and other characteristics and construction details will be better illustrated in the description of a preferred form of execution of the grate, which is given by way of indication, but which is not limiting and which is illustrated in the enclosed drawings; in which:
- - pict. 1 shows the grate strung with the electrical circuits; .
- - pict. 2 shows the anchorage, in which there is the entrance of the wires of the electrical circuits introduced in the grate; pict. 3 illustrates the anti-tear system of the anchorage with a pivot provided with a loop;
- - pict. 4 shows the type of anchorage in which the wires of the circuit are wound once, in order to continue toward other areas; pict. 5 shows an anchorage containing the end-of-the-line resistance of one of the circuits;
- - pict. 6 sketches with a circuit in blocks the connection of the grate circuits with the alarm station.
- Pict. 1 shows the route of the wires, which can be strung in iny direction, even going through the same section several times, although it should be kept in mind, that no area, including the anchorages, should be left without wiring.
- In the case under examination there are 4 anchorages and each of them contains circuit structures and characteristics, which are different from one another.
- With reference to anchorage 7, pict. 2,
tube 8, made of plastic material, is placed inside of it; this tube goes all the way through the wall and serves as a channel for the introduction in the grate of the conductors connected to the alarm station. It is blocked inside anchorage 7 by block 9, made of a gummy plastic material, which contrasts with the inside walls of the above-mentioned anchorage. - In pict. 3,
anchorage 10 holds insidepivot 11, made of iron, which goes all the way through the wall and which presents its threadedend 12 protruding from the anchorage.Plate type 13 is screwed to protrudingend 12 and then cemented in the wall.Pivot 11 is provided at the other end withloop 14, through which the electric conductors are strung. Two bolts, 15 and 16, prevent the rotation ofpivot 11 whileplate 13 is being screwed. The anti-tear function of the pivot is obvious: in fact, in the case of an attempt to tearanchorage 10 from the wall, one also tears the conductors which are strung through the loop. - In pict. 4, inside
anchorage 17, there is ablock 18, made of plastic material which allowsconductors anchorage 19 also holds a'jblock, made of plastic material,for the reversing of the direction of the circuit wires, but inside it there is also the load resistance of one of the two circuits. -
Conductors - Pict. 6 is a sketch of the circuit in blocks which connects the conductors contained in the grate to the alarm station. Resistances R1 and R2 represent respectively the resistive load of the two
circuits trimmer 20, which has the task of balancing the connected load resistance, so that a transistorized circuit maintainsrelay 21 normally closed. - Each variation of the value of resistance R1 or R2 is felt by the balancing circuit which, consequently, causes the opening of
relay 21, which is connected toalarm station 22. The electric opening ofrelay 21 will cause the activation of the alarm. - In the specific case being described, two circuits have been foreseen. They are introduced into the grate, are independent from one another and are represented by resistances R1 and R2, but it is obvious that a single circuit is sufficient for the functioning of the alarm system; on the other hand, it is also possible, for security reasons, to increase the number of circuits beyond 2.
With reference to pict. 1,
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83101279T ATE17770T1 (en) | 1982-02-19 | 1983-02-10 | GRILLE WITH BUILT-IN ALARM SYSTEM. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT85519/82A IT1193074B (en) | 1982-02-19 | 1982-02-19 | LATTICE WITH BUILT-IN ALARM SYSTEM |
IT8551982 | 1982-02-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0087076A1 true EP0087076A1 (en) | 1983-08-31 |
EP0087076B1 EP0087076B1 (en) | 1986-01-29 |
Family
ID=11327398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83101279A Expired EP0087076B1 (en) | 1982-02-19 | 1983-02-10 | Grate with incorporated alarm system |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0087076B1 (en) |
AT (1) | ATE17770T1 (en) |
DE (1) | DE3361943D1 (en) |
IT (1) | IT1193074B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012120329A1 (en) * | 2011-03-10 | 2012-09-13 | De Villiers Marius De Wet | Alarmed intruder barrier |
CN102839902A (en) * | 2012-08-03 | 2012-12-26 | 安徽科蓝智能技术有限公司 | Threading method for distributed resistance network anti-theft window |
ITRM20120302A1 (en) * | 2012-06-28 | 2013-12-29 | Saverio Santomassimo | PASSIVE PROTECTION SYSTEM FOR GRADES AND METAL AND NON-SHUTTER GATES AND METALLIC SHUTTERS AND NOT METALLIC AND NOT REFERED |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104727719B (en) * | 2013-12-24 | 2016-06-08 | 苏州汇诚智造工业设计有限公司 | A kind of manufacture method of the guardrail modelled after an antique with warning box |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE367034C (en) * | 1923-01-16 | Johannes Henggi | Protective grille with alarm circuit closed when its crossbars move | |
US2374139A (en) * | 1941-07-03 | 1945-04-17 | Oliver L Schriner | Burglar alarm |
DE2856819A1 (en) * | 1978-12-30 | 1980-07-17 | Wilhelm Tretschoks | Netting wire for safety fences - has conductive detecting wires in core surrounded by supporting wires and insulating sheath |
DE2653056B2 (en) * | 1976-11-23 | 1980-09-11 | Bochumer Eisenhuette Heintzmann Gmbh & Co, 4630 Bochum | Protection device for the air passage areas of rooms or buildings |
DE2925624A1 (en) * | 1979-06-26 | 1981-01-15 | Geiger Maschf Helmut | Safety bar screen for power stations - produces warning signal of any interference attempt by frogmen |
DE3006999A1 (en) * | 1980-02-25 | 1981-09-24 | Ernst 4200 Oberhausen Blaser | Circuit for security fence - has four wires forming arms of Wheatstone bridge to release alarm when short-circuited |
-
1982
- 1982-02-19 IT IT85519/82A patent/IT1193074B/en active
-
1983
- 1983-02-10 DE DE8383101279T patent/DE3361943D1/en not_active Expired
- 1983-02-10 EP EP83101279A patent/EP0087076B1/en not_active Expired
- 1983-02-10 AT AT83101279T patent/ATE17770T1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE367034C (en) * | 1923-01-16 | Johannes Henggi | Protective grille with alarm circuit closed when its crossbars move | |
US2374139A (en) * | 1941-07-03 | 1945-04-17 | Oliver L Schriner | Burglar alarm |
DE2653056B2 (en) * | 1976-11-23 | 1980-09-11 | Bochumer Eisenhuette Heintzmann Gmbh & Co, 4630 Bochum | Protection device for the air passage areas of rooms or buildings |
DE2856819A1 (en) * | 1978-12-30 | 1980-07-17 | Wilhelm Tretschoks | Netting wire for safety fences - has conductive detecting wires in core surrounded by supporting wires and insulating sheath |
DE2925624A1 (en) * | 1979-06-26 | 1981-01-15 | Geiger Maschf Helmut | Safety bar screen for power stations - produces warning signal of any interference attempt by frogmen |
DE3006999A1 (en) * | 1980-02-25 | 1981-09-24 | Ernst 4200 Oberhausen Blaser | Circuit for security fence - has four wires forming arms of Wheatstone bridge to release alarm when short-circuited |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012120329A1 (en) * | 2011-03-10 | 2012-09-13 | De Villiers Marius De Wet | Alarmed intruder barrier |
GB2503837A (en) * | 2011-03-10 | 2014-01-08 | Marius De Wet De Villiers | Alarmed intruder barrier |
US9035770B2 (en) | 2011-03-10 | 2015-05-19 | Marius de Wet de Villiers | Alarmed intruder barrier |
GB2503837B (en) * | 2011-03-10 | 2018-03-28 | De Wet De Villiers Marius | Alarmed intruder barrier |
ITRM20120302A1 (en) * | 2012-06-28 | 2013-12-29 | Saverio Santomassimo | PASSIVE PROTECTION SYSTEM FOR GRADES AND METAL AND NON-SHUTTER GATES AND METALLIC SHUTTERS AND NOT METALLIC AND NOT REFERED |
CN102839902A (en) * | 2012-08-03 | 2012-12-26 | 安徽科蓝智能技术有限公司 | Threading method for distributed resistance network anti-theft window |
CN102839902B (en) * | 2012-08-03 | 2014-07-02 | 安徽科蓝智能技术有限公司 | Threading method for distributed resistance network anti-theft window |
Also Published As
Publication number | Publication date |
---|---|
IT8285519A0 (en) | 1982-02-19 |
DE3361943D1 (en) | 1986-03-13 |
IT1193074B (en) | 1988-06-02 |
ATE17770T1 (en) | 1986-02-15 |
EP0087076B1 (en) | 1986-01-29 |
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