GB2045527A - The variable resistance pressure sensitive mat or switch - Google Patents

The variable resistance pressure sensitive mat or switch Download PDF

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Publication number
GB2045527A
GB2045527A GB7910997A GB7910997A GB2045527A GB 2045527 A GB2045527 A GB 2045527A GB 7910997 A GB7910997 A GB 7910997A GB 7910997 A GB7910997 A GB 7910997A GB 2045527 A GB2045527 A GB 2045527A
Authority
GB
United Kingdom
Prior art keywords
foil
pressure
laminate
variable resistance
polythene
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
GB7910997A
Other versions
GB2045527B (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.)
WEATHERLEY R
Original Assignee
WEATHERLEY R
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 WEATHERLEY R filed Critical WEATHERLEY R
Priority to GB7910997A priority Critical patent/GB2045527B/en
Publication of GB2045527A publication Critical patent/GB2045527A/en
Application granted granted Critical
Publication of GB2045527B publication Critical patent/GB2045527B/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/029—Composite material comprising conducting material dispersed in an elastic support or binding material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/10—Adjustable resistors adjustable by mechanical pressure or force
    • H01C10/106—Adjustable resistors adjustable by mechanical pressure or force on resistive material dispersed in an elastic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Push-Button Switches (AREA)

Abstract

A pressure sensitive mat comprises a pressure sensitive laminate which produces a significant change in electrical resistance upon the application of external pressure. The laminate consists of a sandwich of carbon impregnated polythene between two layers of metallic foil. Electrical connection to the laminate is made to the two layers of foil. The mat may have an outer layer of heavy duty polythene. <IMAGE>

Description

SPECIFICATION Variable resistance pressure sensitive mat The attached diagrams show the construction of a simple device which laminates foil of aluminium or similar material i.e. copper foil etc. with a polythene which has been impregnated with carbon or graphite which gives it a property of variable resistance with respect to pressure.
This construction is then protected by two external layers of heavy duty polythene which affords protection to the foil laminates.
Wire is soldered to the foil and presented as connecting electrodes. Externally to the laminate construction. The principle could also be described as a switch.
1. The principle of using an impregnated layer of polythene to form a pressure sensitive variable resistance laminate using metalic foil as the electrical plates or connecting surfaces is I believe inventive and not been done in this way before.
2. My application states that this can be used as a switch using a small area of laminate constructed in the same manner or applying the copper coating of a printed circuit board as one of the electrical connections with a layer of metalic foil forming the other electrical connection. This I claim is an inventive step and not been done before.
3. Any electrical circuit which requires a variable resistance to control it such as speed control on motors foot controls on musical instruments will lend themselves to this application and I claim that any use of this principle in such circuits does not detract from my original inventive step and would make similar applications invalid.
CLAIMS (25 Jun 1980) 1. A pressure-sensitive mat, comprising a laminate of two metsL.toil electrodes and an interposed foil of electrically insulating material loaded with electridally conductive particles, such that the electrical resistance between the electrodes varies in accordance with pressure applied to the mat.
2. A pressure-sensitive mat as claimed in claim 1, further comprising two outer layers of protective material covering the opposite sides of the laminate.
3. A pressure-sensitive mat as claimed in claim 1 or 2, in which the interposed foil comprises polythene loaded with carbon or graphite.
4. A pressure-sensitive mat substantially as herein described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Variable resistance pressure sensitive mat The attached diagrams show the construction of a simple device which laminates foil of aluminium or similar material i.e. copper foil etc. with a polythene which has been impregnated with carbon or graphite which gives it a property of variable resistance with respect to pressure. This construction is then protected by two external layers of heavy duty polythene which affords protection to the foil laminates. Wire is soldered to the foil and presented as connecting electrodes. Externally to the laminate construction. The principle could also be described as a switch. CLAIMS 1. The principle of using an impregnated layer of polythene to form a pressure sensitive variable resistance laminate using metalic foil as the electrical plates or connecting surfaces is I believe inventive and not been done in this way before. 2. My application states that this can be used as a switch using a small area of laminate constructed in the same manner or applying the copper coating of a printed circuit board as one of the electrical connections with a layer of metalic foil forming the other electrical connection. This I claim is an inventive step and not been done before. 3. Any electrical circuit which requires a variable resistance to control it such as speed control on motors foot controls on musical instruments will lend themselves to this application and I claim that any use of this principle in such circuits does not detract from my original inventive step and would make similar applications invalid. CLAIMS (25 Jun 1980)
1. A pressure-sensitive mat, comprising a laminate of two metsL.toil electrodes and an interposed foil of electrically insulating material loaded with electridally conductive particles, such that the electrical resistance between the electrodes varies in accordance with pressure applied to the mat.
2. A pressure-sensitive mat as claimed in claim 1, further comprising two outer layers of protective material covering the opposite sides of the laminate.
3. A pressure-sensitive mat as claimed in claim 1 or 2, in which the interposed foil comprises polythene loaded with carbon or graphite.
4. A pressure-sensitive mat substantially as herein described with reference to the accompanying drawings.
GB7910997A 1979-03-28 1979-03-28 Variable resistance pressure sensitive mat or switch Expired GB2045527B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7910997A GB2045527B (en) 1979-03-28 1979-03-28 Variable resistance pressure sensitive mat or switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7910997A GB2045527B (en) 1979-03-28 1979-03-28 Variable resistance pressure sensitive mat or switch

Publications (2)

Publication Number Publication Date
GB2045527A true GB2045527A (en) 1980-10-29
GB2045527B GB2045527B (en) 1983-06-15

Family

ID=10504203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7910997A Expired GB2045527B (en) 1979-03-28 1979-03-28 Variable resistance pressure sensitive mat or switch

Country Status (1)

Country Link
GB (1) GB2045527B (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293734A1 (en) * 1987-06-02 1988-12-07 LEDA Logarithmic Electrical Devices for Automation S.r.l. Two-dimensional electric conductor designed to function as an electric switch
WO1994025972A1 (en) * 1993-04-30 1994-11-10 Meteor Gummiwerke K.H. Bädje Gmbh & Co. Switch, especially safety switch
WO1996034403A1 (en) * 1995-04-27 1996-10-31 Burgess Lester E Pressure activated switching device
EP0812798A1 (en) * 1996-06-14 1997-12-17 Still Wagner GmbH &amp; Co. KG Control element for industrial truck guided by a towbar
GB2320347A (en) * 1996-12-04 1998-06-17 Hodgkinson & Corby Limited Inflatable cellular support cushion or mattress detector
US5856644A (en) * 1995-04-27 1999-01-05 Burgess; Lester E. Drape sensor
US6114645A (en) * 1995-04-27 2000-09-05 Burgess; Lester E. Pressure activated switching device
US6121869A (en) * 1999-09-20 2000-09-19 Burgess; Lester E. Pressure activated switching device
GB2351339A (en) * 1999-06-23 2000-12-27 Zohra Rizvi Foot pedal control for a data input device
US6329617B1 (en) 2000-09-19 2001-12-11 Lester E. Burgess Pressure activated switching device
US6396010B1 (en) 2000-10-17 2002-05-28 Matamatic, Inc. Safety edge switch for a movable door
US6437263B1 (en) 2001-10-11 2002-08-20 Lester E. Burgess Drape sensor
US6918438B2 (en) * 2002-06-04 2005-07-19 International Business Machines Corporation Finned heat sink
CN111824356A (en) * 2020-07-29 2020-10-27 中国船舶工业集团公司第七0八研究所 Design method of I-shaped sandwich structure under action of wheel print load

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293734A1 (en) * 1987-06-02 1988-12-07 LEDA Logarithmic Electrical Devices for Automation S.r.l. Two-dimensional electric conductor designed to function as an electric switch
US4876419A (en) * 1987-06-02 1989-10-24 Leda Logarithmic Electrical Devices For Automation S.R.L. Two-dimensional electric conductor designed to function as an electric switch
WO1994025972A1 (en) * 1993-04-30 1994-11-10 Meteor Gummiwerke K.H. Bädje Gmbh & Co. Switch, especially safety switch
US5780793A (en) * 1993-04-30 1998-07-14 Meteor Gummiwerke K. H. Badje Gmbh & Co. Safety switch having a carbon fiber conductor
US6114645A (en) * 1995-04-27 2000-09-05 Burgess; Lester E. Pressure activated switching device
US5695859A (en) * 1995-04-27 1997-12-09 Burgess; Lester E. Pressure activated switching device
US6072130A (en) * 1995-04-27 2000-06-06 Burgess; Lester E. Pressure activated switching device
WO1996034403A1 (en) * 1995-04-27 1996-10-31 Burgess Lester E Pressure activated switching device
US5828289A (en) * 1995-04-27 1998-10-27 Burgess; Lester E. Pressure activated switching device
US5856644A (en) * 1995-04-27 1999-01-05 Burgess; Lester E. Drape sensor
US5886615A (en) * 1995-04-27 1999-03-23 Burgess; Lester E. Pressure activated switching device with piezoresistive material
US5910355A (en) * 1995-04-27 1999-06-08 Burgess; Lester E. Pressure activated switching device
US5962118A (en) * 1995-04-27 1999-10-05 Burgess; Lester E. Pressure activated switching device
EP0812798A1 (en) * 1996-06-14 1997-12-17 Still Wagner GmbH &amp; Co. KG Control element for industrial truck guided by a towbar
GB2320347A (en) * 1996-12-04 1998-06-17 Hodgkinson & Corby Limited Inflatable cellular support cushion or mattress detector
GB2351339A (en) * 1999-06-23 2000-12-27 Zohra Rizvi Foot pedal control for a data input device
US6121869A (en) * 1999-09-20 2000-09-19 Burgess; Lester E. Pressure activated switching device
US6329617B1 (en) 2000-09-19 2001-12-11 Lester E. Burgess Pressure activated switching device
US6396010B1 (en) 2000-10-17 2002-05-28 Matamatic, Inc. Safety edge switch for a movable door
US6437263B1 (en) 2001-10-11 2002-08-20 Lester E. Burgess Drape sensor
US6918438B2 (en) * 2002-06-04 2005-07-19 International Business Machines Corporation Finned heat sink
US7222423B2 (en) 2002-06-04 2007-05-29 International Business Machines Corporation Method of manufacturing a finned heat sink
CN111824356A (en) * 2020-07-29 2020-10-27 中国船舶工业集团公司第七0八研究所 Design method of I-shaped sandwich structure under action of wheel print load

Also Published As

Publication number Publication date
GB2045527B (en) 1983-06-15

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PCNP Patent ceased through non-payment of renewal fee