GB1580740A - Electrical contact panels - Google Patents
Electrical contact panels Download PDFInfo
- Publication number
- GB1580740A GB1580740A GB26997/77A GB2699777A GB1580740A GB 1580740 A GB1580740 A GB 1580740A GB 26997/77 A GB26997/77 A GB 26997/77A GB 2699777 A GB2699777 A GB 2699777A GB 1580740 A GB1580740 A GB 1580740A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact panel
- panel according
- conducting material
- low melting
- layer
- 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.)
- Expired
Links
- 238000002844 melting Methods 0.000 claims description 24
- 230000008018 melting Effects 0.000 claims description 24
- 239000004020 conductor Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 10
- 239000012777 electrically insulating material Substances 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 5
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000009429 distress Effects 0.000 claims description 2
- 238000010304 firing Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000003999 initiator Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000013021 overheating Methods 0.000 claims description 2
- 239000004509 smoke generator Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/767—Normally open
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Laminated Bodies (AREA)
Description
(54) ELECTRICAL CONTACT PANELS
(71) We, HALEY & WELLER
LIMITED, a British Company of Wilne,
Draycott, Derbyshire do hereby declare the invention for which we pray that a patent may be granted to us and the method by which it is to be performed be particularly described in and by the following statement:
This invention relates to electrical contact panels.
According to one aspect of the present invention an electrical contact panel comprises a plurality of superposed layers including a first and second sheet of electrical conducting material, said first and second sheet having sandwiched therebetween a layer of low melting electrical conducting material and an apertured layer of electrically insulating material, the arrangement being such that the first and second layers of electrical conducting material are normally electrically insulated from one another but the application of heat to the panel will cause the low melting material to flow and to connect electrically the first and second sheets via the apertures in the apertured layer.
The plurality of layers may be held together to form a panel by means of adhesive bonding, or alternatively clamps or bolts may be employed, provided that any such clamps or bolts do not form an electrical circuit between the first and second electrical conducting layers. Bolts or clamps of insulating material may be used or alternatively insulated sleeves may be employed.
The layer of low melting electrical conducting material should preferably have a melting point below about 80"C. In order to avoid climatic problems it is also preferable that the melting point should be above 40"C.
The layer may comprise a suitable metal alloy but any other material may be employed provided that it has a suitable melting point and is a satisfactory conductor of electricity in the molten state.
The layer of electrically insulating material may, for example, be a plastics material and to this end both a polyethylene film and pvc film have been found to be suitable. It is of course important that the layer of insulating material should have a melting point higher than that of the layer of low melting material.
Conveniently, the layer of insulating material has a thickness of about 0.2mm and is provided with a plurality of perforations which may, for example, be of 2 mm. diameter occurring at a frequency over the surface of from 3 to 5 holes per square centimetre.
Reference is now made to the accompanying drawing which is a schematic cross section from a part of a panel according to the invention.
The panel comprises a first layer of electrical conducting material 1 and a second sheet of electrical conducting material 4. Interposed between these is a layer of low melting metal alloy 2 and a perforated sheet of insulating plastics material 3 having perforations 5. Electrical connecting elements are connected to the sheets 1 and 4.
In use the electrical connections connected to sheets 1 and 4 are included in an electrical circuit of a security device such as an audible or visible alarm. If an attempt is made to drill, cut, or otherwise sever the panel an electrical connection will be made between the electrical conducting sheets 1 and 4 and actuation of the security device will occur. Similarly, any application of heat to the panel will cause the low melting material to flow through the perforations in the insulating layer thereby making an electrical connection between the sheets 1 and 4, again serving to actuate a security device.
The panels of the invention have a number of potential applications, for example, they can be applied to the inside of a security door so that any application of a cutting tool or cutting torch to the door would cause the panel to conduct electricity. The use of a panel in this manner has the advantage of course that an alarm can be energised at a remote situation without their being any local indication that the energisation has taken place. The panel can also be used in conjunction with a thief deterrent device such as a pyrotechnic smoke generator.
The panels also have industrial applications, for example, monitoring the temperatures of manufacturing processes, identifying the "blow-back" of boilers in heating installations and the detection of overheating in mechanical equipment.
A further application is an an initiator, for example, of pyrotechnical devices whereby the use of such a panel in conjunction with a suitable striker mechanism could be used to control the firing of a pyrotechnic device such as a marine distress signal.
WHAT WE CLAIM IS:
1. An electrical contact panel comprising a plurality of superposed layers including a first and second sheet of electrical conducting material, said first and second sheet having sandwiched therebetween a layer of low melting electrical conducting material and an apertured layer of electrically insulating material, the arrangement being such that the first and second layers of electrical conducting material are electrically insulated from one another but the application of heat to the panel will cause the low melting material to flow and to connect electrically the first and second sheets via the apertures in the apertured layer.
2. A contact panel according to claim 1 in which the plurality of layers are held together by adhesive bonding.
3. A contact panel according to claim 1 in which the layers are held together by clamps or bolts.
4. A contact panel according to claim 3 in which the clamps or bolts are of insulating material.
5. A contact panel according to claim 3 in which the clamps or bolts are provided with an insulated surface.
6. A contact panel according to any of claims 1 to 5 in which the low melting electri
cal conducting material has a melting point below 80"C.
7. A contact panel according to any of
claims 1 to 6 in which the low melting electrical conducting material has a melting point above 40"C.
8. A contact panel according to any of
claims 1 to 7 in which in the low melting
conducting material is a metal alloy.
9. A contact panel according to any of
claims 1 to 8 in which the electrically insulat
ing material is a plastics material.
10. A contact panel according to claim 9 in which the layer of electrically insulating material has a thickness of about 0.2 mm.
11. A contact panel according to any of
claims 1 to 10 in which the perforations in the electrically insulating layer are of 2mm.
diameter occurring at a frequency over the surface of 3 to 5 holes per square centimetre.
12. An electrical panel substantially as herein described with reference to and as shown in the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (12)
1. An electrical contact panel comprising a plurality of superposed layers including a first and second sheet of electrical conducting material, said first and second sheet having sandwiched therebetween a layer of low melting electrical conducting material and an apertured layer of electrically insulating material, the arrangement being such that the first and second layers of electrical conducting material are electrically insulated from one another but the application of heat to the panel will cause the low melting material to flow and to connect electrically the first and second sheets via the apertures in the apertured layer.
2. A contact panel according to claim 1 in which the plurality of layers are held together by adhesive bonding.
3. A contact panel according to claim 1 in which the layers are held together by clamps or bolts.
4. A contact panel according to claim 3 in which the clamps or bolts are of insulating material.
5. A contact panel according to claim 3 in which the clamps or bolts are provided with an insulated surface.
6. A contact panel according to any of claims 1 to 5 in which the low melting electri
cal conducting material has a melting point below 80"C.
7. A contact panel according to any of
claims 1 to 6 in which the low melting electrical conducting material has a melting point above 40"C.
8. A contact panel according to any of
claims 1 to 7 in which in the low melting
conducting material is a metal alloy.
9. A contact panel according to any of
claims 1 to 8 in which the electrically insulat
ing material is a plastics material.
10. A contact panel according to claim 9 in which the layer of electrically insulating material has a thickness of about 0.2 mm.
11. A contact panel according to any of
claims 1 to 10 in which the perforations in the electrically insulating layer are of 2mm.
diameter occurring at a frequency over the surface of 3 to 5 holes per square centimetre.
12. An electrical panel substantially as herein described with reference to and as shown in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB26997/77A GB1580740A (en) | 1977-06-28 | 1977-06-28 | Electrical contact panels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB26997/77A GB1580740A (en) | 1977-06-28 | 1977-06-28 | Electrical contact panels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1580740A true GB1580740A (en) | 1980-12-03 |
Family
ID=10252524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26997/77A Expired GB1580740A (en) | 1977-06-28 | 1977-06-28 | Electrical contact panels |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1580740A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143174A (en) * | 1983-06-24 | 1985-02-06 | Didier Werke Ag | Composite sheet for lining liquid containers |
| WO2011148002A1 (en) * | 2010-05-27 | 2011-12-01 | Seocha Tabiques Inteligentes, S.L. | Fixing system for sandwich panels |
-
1977
- 1977-06-28 GB GB26997/77A patent/GB1580740A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143174A (en) * | 1983-06-24 | 1985-02-06 | Didier Werke Ag | Composite sheet for lining liquid containers |
| WO2011148002A1 (en) * | 2010-05-27 | 2011-12-01 | Seocha Tabiques Inteligentes, S.L. | Fixing system for sandwich panels |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |