AU651459B2 - Movement detector - Google Patents

Movement detector Download PDF

Info

Publication number
AU651459B2
AU651459B2 AU18480/92A AU1848092A AU651459B2 AU 651459 B2 AU651459 B2 AU 651459B2 AU 18480/92 A AU18480/92 A AU 18480/92A AU 1848092 A AU1848092 A AU 1848092A AU 651459 B2 AU651459 B2 AU 651459B2
Authority
AU
Australia
Prior art keywords
filament
detection system
hollow member
movement detection
barrier
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.)
Ceased
Application number
AU18480/92A
Other versions
AU1848092A (en
Inventor
Harry Grey
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.)
Grey Helen
Original Assignee
HELEN GREY
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 HELEN GREY filed Critical HELEN GREY
Priority to AU18480/92A priority Critical patent/AU651459B2/en
Publication of AU1848092A publication Critical patent/AU1848092A/en
Application granted granted Critical
Publication of AU651459B2 publication Critical patent/AU651459B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Landscapes

  • Fencing (AREA)

Description

A P/00/011 Regulation 3.2
AUSTRALIA
PATENTS ACT 1990 5 1 4 COMPLETE SPECIFICATION FOR A STANDARD PATENT
ORIGINAL
TO BE COMPLETED BY APPLICANT Name of Applicant: HARRY GREY AND HELEN GREY o *o S" Actual Inventor: HARRY GREY Address for Service: CALLINAN LAWRIE, 278 High Street, Kew, 3101, Victoria, Australia Invention Title: "MOVEMENT DETECTOR" The following statement is a full description of this invention, including the best method of performing it known to us:- 1 1 i -2- This invention relates to movement detectors for alarm systems which may be incorporated in new fences or added to pre-existing fences. More particularly it relates to movement detectors which may detect movement of part of a fence resulting from attempts to scale said fence.
Safety fences around swimming pools have been found to be surmountable by small children who may pile boxes one upon the other to attempt to climb such fences. Such activity may often go undetected and the small child may successfully clamber over the fence. Alarm systems such as those used in microwave or infrared detection systems require detectors and sources to be :10 mounted in appropriate positions. Such detection systems may not be able to r e S provide sufficient coverage to cover the whole of the relevant fence or may require a multiplicity of detectors and/or sources so that the cost is thereby significantly increased. Alarms such as reed switches on gates generally only operate when the gate is opened. Clearly such alarms can be bypassed when the fence is scaleu.
According to the present invention there is provided a movement detection system including at least one hollow member mounted on or in at least one movable or displaceable portion of a barrier, said at least one moveable or displaceable portion of a barrier being pivotally mounted on at least one fixed portion of said barrier, the said at least one hollow member enclosing a filament, said filament at one end being fixed to or otherwise held at corresponding end of one of said at least one hollow member, the other end of said filament being i attached to switch means capable of activating means for emitting a signal, said 7 4 1,
I
2a filament being under tension and said switch means being operable by change in tension in said filament when one or more of said at least one movable or displaceable portions is displaced or moved from a preselected orientation or position. The term "barrier" includes fences, gates and walls.
ft ft.
f 'It, o 5 ft ft f t a ii i -3- Preferably saidr movreahe nrdisplrcpahlp prtfinns are pivntally mrninted nn fiypd portions of said harrier.
Preferably said switching means is operable by increase in tension in said filament, which may be a cable of steel wire.
Preferably the signal emitted when the system is activated is an audible signal. However, the signal could be visual or an electric, electromagnetic or other form of signal transmittable to a receiver in a remote location.
In order that the invention may be more cearly understood, reference is made to preferred embodiments as disclosed in the accompanying non-limiting drawings in which Figure 1 depicts a perspective view of part of a fence incorporating an embodiment of the invention; Figure 2 depicts a sectional view along line 2-2 of Fig 1; Figure 3 a perspective view of the embodiment of Fig 1 showing the movable portion of the fence displaced from its mean position; SFigure 4 depicts a sectional view along line 4-4 of Fig 3; and Figure 5 depicts a perspective view of another embodiment of the €t t Sinvention.
In Figure 1, 10 generally denotes a portion of a fence incorporating the .20 invention, 12 denotes a tiltable or moveable panel of said fence, and 14 denotes a gate in said fence, 16 denotes a length of hollow member fixed to upright bars 18 of moveable panel 12, and 20 denotes a further length of hollow member fixed to upright bars 22 of gate 14. Within hollow members 16 and 20 is disposed a filament 24, preferably a cable of steel wire, which may either be fixed to one end of a hollow member or bear upon said end, or, as depicted, may pass through a i: -4hole 28 in upright post 26 of the fence and thence through hollow members on other movable portions (not shown). The other end of said filament is secured to a switch (not shown here) capablk of activating an alarm signal emitting device.
The filament is under a pre-selected amount of tension. Moveable panel 12 is pivotably mounted on steel or nylon pins 30 set in upright posts 26. When panel 12 is tilted (as in Figure 3) from a pre-selected position or orientation or gate 14 is opened either inwardly or outwardly increased tenaion on the filamenrt caused by said displacement of panel or gate operates said switch which in turn activates a device which emits an audible alarm signal. The hollow members 16 and 20 not only support the filament but also act to prevent the filament being subjected to increased tension by the weight of leaves or birds and thereby accidentally operating said switch and activating the alarm signal emitting device.
Lengths of hollow member can be placed on any number of movable ,I 6°Q panels of a fence and the filament can extend from one section of fence to another 115 so that a single filament may encompass all of the fence including one or more t Sc gates.
The switch means can be any suitable switching means whilst the alarm tt,, system may either be battery-powered or mains-powered with a battery back-up.
One use envisaged for the embodiment shown in Figures 1 to 4 is for fences around in-ground swimming pools. Such an embodiment may be ttt incorporated in a fence during initial fabrication or added later, where circumstances permit.
In Figure 5, the numeral 32 denotes supports for a construction, in this case an above-ground swimming pool, and the numeral 34 denotes outriggers bolted on to said supports. A cage 36 is pivotally mounted (preferably at balance l" i points) on nylon bushes provided on bolts 40 passing through holes 42 in arms 44 of outriggers 34 (shown on one outrigger only) and holes 46 in outer lateral portions 48 of cage 36. A cable 50 passes through nylon bushes in holes 52 in the upper parts of the arms 44 of the outriggers and through a hollow member 54 forming part of the structure of cage 36. The hollow member 54 is also provided with nylon bushes through which the cable also passes. The provision of nylon bushes minimises friction and wear. The cable 50 may pass through a plurality of such arrangements forming a barrier. In a manner similar to that described above in relation to the preceding embodiment the cable is under tension and connected to a switch capable of activating an alarm signal emitting device. Tilting of cage 36 from its normal "at rest", or balance point, position increases tension on the cable leading to operation of the switch and activation of the alarm. Attempts to scale a barrier fitted with such an embodiment by trying to clamber over the cage ~normally will lead to activation of the alarm as the cage generally will be tilted by ~the application of forces to it during the course of such attempts. Such tilting of S the cage will also tend to render the scaling of the barrier more difficult.
It is believed that the invention and many of its attendant advantages 4) a.
will be understood from the foregoing description and it will be apparent that various changes may be made in the form, construction and arrangement of the embodiments described without departing from the ambit of the invention or sacrificing all its material advantages, the embodiments hereinbefore described being merely preferred embodiments thereof.

Claims (6)

1. A movement detection system including at least one hollow member mounted on or in at least one movable or displaceable portion of a barrier, said at least one moveable or displaceable portion of a barrier being pivotally mounted on at least one fixed portion of said barrier, the said at least one hollow member enclosing a filament, said filament at one end being fixed to or otherwise held at corresponding end of one of said at least one hollow member, the other end of said filament being attached to switch means capable of activating means ttt, S for emitting a signal, said filament being under tension and said switch means tIr !0 being operable by change in tension in said filament when one or more of said at least one movable or displaceable portions is displaced or moved from a *t ttt preselected orientation or position.
2. A movement detection system as claimed in Claim 1 wherein said switching means is operable by increase in tension in said filament.
3. A movement detection system as claimed in either of Claim 1 or Claim 2 wherein the filament is a cable of steel wire.
4. A movement detection system as claimed in any one of Claims 1 to 3 wherein said signal is an audible signal.
A movement detection system as claimed in any one of Claims 1 to 3 substantially as hereinbefore described with reference to either Figure 1 or Figure 2. 'I W -7-
6. A movement detection system as claimed in any one of Claims 1 to 3 substantially as hereinbefore disclosed with reference to Figure DATED this 26th day of May,
1994. HARRY GREY AND HELEN GREY By their Patent Attorneys CALLINAN LAWRIE t St 'Lt t it it S S '555 S iS ii S. II I S S S SIt S ISiS S S Ii IS S I ''55 US I Ii S iS ft ABSTRACT A movement detection system including at least one hollow member (16) mounted on or in at least one movable or displaceable portion (12) of a barrier (10) the least one hollow member (16) enclosing a filament the filament (24) at one end being fixed to or bearing upon corresponding end of one of the at least one hollow member the other end of the filament (24) being attached to switch means capable of activating means for emitting a signal, the filament (24) being under tension and the switch means being operable by change in tension in the filament (24) when one or more of the at least one movable or displaceable portions (12) is displaced or moved from a preselected orientation or position. 0f V. a *40 4* tt t ta t i V t tt
AU18480/92A 1991-06-24 1992-06-24 Movement detector Ceased AU651459B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18480/92A AU651459B2 (en) 1991-06-24 1992-06-24 Movement detector

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPK6814 1991-06-24
AUPK681491 1991-06-24
AU18480/92A AU651459B2 (en) 1991-06-24 1992-06-24 Movement detector

Publications (2)

Publication Number Publication Date
AU1848092A AU1848092A (en) 1993-01-07
AU651459B2 true AU651459B2 (en) 1994-07-21

Family

ID=25617206

Family Applications (1)

Application Number Title Priority Date Filing Date
AU18480/92A Ceased AU651459B2 (en) 1991-06-24 1992-06-24 Movement detector

Country Status (1)

Country Link
AU (1) AU651459B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112482889A (en) * 2020-12-05 2021-03-12 陕西天赟轩越科技有限公司 Rail guard for construction

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164183A (en) * 1984-08-17 1986-03-12 Alan John Pepper Intruder detecting fences
US4604609A (en) * 1985-03-21 1986-08-05 Wakefield Jr George H Security system
AU3329389A (en) * 1988-05-06 1989-11-09 Magal Security Systems, Ltd. Intrusion detection barrier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164183A (en) * 1984-08-17 1986-03-12 Alan John Pepper Intruder detecting fences
US4604609A (en) * 1985-03-21 1986-08-05 Wakefield Jr George H Security system
AU3329389A (en) * 1988-05-06 1989-11-09 Magal Security Systems, Ltd. Intrusion detection barrier

Also Published As

Publication number Publication date
AU1848092A (en) 1993-01-07

Similar Documents

Publication Publication Date Title
US5102103A (en) Child safety fence
US4576507A (en) Terrorist vehicle barrier
US5152508A (en) Safety barrier
US4380327A (en) Safety barrier
US4989835A (en) Vehicle barrier
US4348012A (en) Intruder barrier
EP0235440A1 (en) Security fence
US6192627B1 (en) Lead screw barrier system
AU651459B2 (en) Movement detector
WO2006005926A1 (en) Security system for a boundary
US4525701A (en) Security alarm arrangement
US6382596B1 (en) Security fence
US4462484A (en) Tension sensing device
KR102522941B1 (en) Apparatus for preventing of suicide with safety of pedestrian
KR102009831B1 (en) Crime prevention control system of apartment house architecture
DE69127000T2 (en) Wall structure
KR102563057B1 (en) Safety fence for preventing suicide
KR100987509B1 (en) Hybrid safety fence of bicycle road with water gate
WO2007006068A1 (en) Collapsible fencing system
GB2186300A (en) Collapsible fence post
AU712342B2 (en) Fence-mountable barriers
US4574916A (en) Step to safety
KR20240083522A (en) Slide equipped with safe arrival system
EP0980698B1 (en) Control device for solution of tasks
JPS6329091Y2 (en)

Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired