US3794790A - Electrical switches - Google Patents

Electrical switches Download PDF

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Publication number
US3794790A
US3794790A US00326339A US3794790DA US3794790A US 3794790 A US3794790 A US 3794790A US 00326339 A US00326339 A US 00326339A US 3794790D A US3794790D A US 3794790DA US 3794790 A US3794790 A US 3794790A
Authority
US
United States
Prior art keywords
conductor
sheath
conductors
conductive
switch
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 - Lifetime
Application number
US00326339A
Other languages
English (en)
Inventor
K Leyland
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.)
Rists Wires and Cables Ltd
Original Assignee
Rists Wires and Cables Ltd
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 Rists Wires and Cables Ltd filed Critical Rists Wires and Cables Ltd
Application granted granted Critical
Publication of US3794790A publication Critical patent/US3794790A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/10—Contact cables, i.e. having conductors which may be brought into contact by distortion of the cable
    • H01B7/104—Contact cables, i.e. having conductors which may be brought into contact by distortion of the cable responsive to pressure
    • H01B7/106—Contact cables, i.e. having conductors which may be brought into contact by distortion of the cable responsive to pressure comprising concentric conductors
    • 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

Definitions

  • ABSTRACT An electrical switch including a first flexible elongated conductor and a second flexible elongated conductor coaxial with the first conductor.
  • An insulating element which is both resilient and deformable spaces the first conductor from the second conductor along the whole length of the first conductor, and the insulating element is loaded with conductive particles. The nature of the insulating element containing the conductive particles is such that compression of the element in a direction to decrease the spacing between the first and second conductors establishes a conductive path within the element between the first and second conductors.
  • a switch according to the invention includes a first flexible elongated conductor, a second flexible elongated conductor, and a resilient, deformable insulating element spacing the first conductor, throughout its length, from the second conductor, the insulating element being loaded with conductive particles whereby compression of the element in a direction to decrease the spacing of the first and second conductors establishes a conductive path within the element between the first and second conductors.
  • the first conductor is in the form of a conductive wire or lead
  • the insulating element is in the form of a sheath within which the first conductor extends
  • the second conductor is in the form of a conductive braid encircling said element.
  • the switch also includes an outer flexible protective sleeve.
  • the switch 11 includes a first electrical conductor in the form of a copper wire 12.
  • Encircling the wire 12 is an insulating element 13 in the form of a sheath of a resilient deformable insulating material which is loaded with spaced electrically conductive particles, whereby compression of a part of the element 13 urgesthe adjacent particles into contact to render that part of the element 13 conductive.
  • the first conductor 12 extends within the element 13, the element 13 constituting a sheath encircling the conductor 12.
  • Encircling the element 13, is a woven copper braid l4, and in the rest condition of the element 13, the element 13 serves to electrically insulate the copper braid 14 from the copper wire 12. Both the wire 12 and the braid 14 are of course flexible. Deformation of the eletraffic monitoring, or warning systems where a length.
  • the switch can thus be used to control a device 15 for example a bell or a buzzer in the sheath spacing said first conductor, throughout its length, from said second conductor said sheath encircling said first conductor, the material of said sheath being loaded with conductive particles, whereby compression of said sheath in a direction to decrease thev spacing of said first and second conductors establishes a conductive path within said sheath between said first and second conductors.
  • a device 15 for example a bell or a buzzer in the sheath spacing said first conductor, throughout its length, from said second conductor said sheath encircling said first conductor, the material of said sheath being loaded with conductive particles, whereby compression of said sheath in a direction to decrease thev spacing of said first and second conductors establishes a conductive path within said sheath between said first and second conductors.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Push-Button Switches (AREA)
  • Insulated Conductors (AREA)
  • Contacts (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
US00326339A 1972-02-04 1973-01-24 Electrical switches Expired - Lifetime US3794790A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB527672A GB1406486A (en) 1972-02-04 1972-02-04 Electrical switches

Publications (1)

Publication Number Publication Date
US3794790A true US3794790A (en) 1974-02-26

Family

ID=9793052

Family Applications (1)

Application Number Title Priority Date Filing Date
US00326339A Expired - Lifetime US3794790A (en) 1972-02-04 1973-01-24 Electrical switches

Country Status (8)

Country Link
US (1) US3794790A (enrdf_load_stackoverflow)
JP (1) JPS4888480A (enrdf_load_stackoverflow)
AU (1) AU476731B2 (enrdf_load_stackoverflow)
DE (1) DE2304595A1 (enrdf_load_stackoverflow)
ES (1) ES411247A1 (enrdf_load_stackoverflow)
FR (1) FR2170084B1 (enrdf_load_stackoverflow)
GB (1) GB1406486A (enrdf_load_stackoverflow)
IT (1) IT977692B (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060705A (en) * 1975-04-09 1977-11-29 Cyril John Peachey Pressure actuated continuous switch
US4258100A (en) * 1977-09-09 1981-03-24 Kabushiki Kaisha Kyowa Pressure-sensitive electric conductive sheet material
US4359726A (en) * 1980-02-12 1982-11-16 Jacques Lewiner Composite sheets constituting electromechanical transducers and transducers equipped with such sheets
US4374374A (en) * 1980-04-17 1983-02-15 Goof Sven Karl Lennart Electric contact device
US4839480A (en) * 1986-11-05 1989-06-13 The Gates Rubber Company Vehicle sensing device
US4935699A (en) * 1989-05-15 1990-06-19 Westinghouse Electric Corp. Means to detect and locate pinching and chafing of conduits
DE4013624A1 (de) * 1989-04-28 1990-10-31 Riken Kk Quetschsicheres fenster/tuer-schliesssystem sowie sensoren und schaltungen fuer ein solches system
US5068638A (en) * 1988-09-14 1991-11-26 The Gates Rubber Company Electrical sensing element
DE4042496C2 (de) * 1989-04-28 1996-03-07 Riken Kk Sicherheitsvorrichtung für ein Fenster oder eine Tür sowie Schaltungen für eine solche Vorrichtung
WO2001088935A1 (en) * 2000-05-18 2001-11-22 Peratech Ltd. Flexible switching devices
US20030184309A1 (en) * 2002-03-29 2003-10-02 Lurtz Jerome R. Sensor for measuring changes in ambient conditions
US20030184310A1 (en) * 2002-03-29 2003-10-02 Lurtz Jerome R. Pressure, temperature and contact sensor
US7186356B2 (en) 2001-06-07 2007-03-06 Peratech Ltd. Analytical device
US9857246B2 (en) 2014-09-17 2018-01-02 Sensable Technologies, Llc Sensing system including a sensing membrane
US10263174B2 (en) 2013-03-15 2019-04-16 Nano Composite Products, Inc. Composite material used as a strain gauge
US10260968B2 (en) 2013-03-15 2019-04-16 Nano Composite Products, Inc. Polymeric foam deformation gauge
US10405779B2 (en) 2015-01-07 2019-09-10 Nano Composite Products, Inc. Shoe-based analysis system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2720252A1 (de) * 1976-05-31 1977-12-22 Bekaert Sa Nv Zaundraht in verbundbauweise sowie zaun mit derartigem draht
DE2744860A1 (de) * 1977-10-05 1979-04-12 Heist Ernst Koaxialer elektrischer langschalter (meldeschlange)
DE3216446A1 (de) * 1982-05-03 1983-11-03 Fa. Andreas Stihl, 7050 Waiblingen Sicherheitseinrichtung an einem tragbaren, motorisch angetriebenen handgeraet
GB2132426A (en) * 1982-12-23 1984-07-04 Raychem Ltd Conductive-polymer circuit interruptor
JPS6022725U (ja) * 1983-07-25 1985-02-16 株式会社　信明産業 感圧スイツチ線
DE3418589A1 (de) * 1984-05-18 1985-11-21 Hoermann Kg Antrieb Steuertec Ueberwachungsleiste fuer den unfallschutz eines motorisch angetriebenen tor-, tuerblattes o.dgl.
GB2198237A (en) * 1986-11-17 1988-06-08 John Wilfrid Finch Tactile force sensor
DE3809960A1 (de) * 1988-03-24 1989-10-05 Bosch Gmbh Robert Einklemmschutz-sensor
DE102011014201B3 (de) * 2011-03-16 2012-08-09 Rehau Ag + Co. Knöcherschiene für zahnmedizinische Zwecke
DE102012001150B4 (de) * 2012-01-21 2018-10-18 Audi Ag Vorrichtung mit Batterie, Elektromotor und einem die Batterie und den Elektromotor elektrisch verbindenden Stromkabel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305717A (en) * 1939-10-23 1942-12-22 Bell Oidric Joseph La Circuit controlling means
US2445660A (en) * 1945-08-17 1948-07-20 Elevator Supplies Co Inc Electric treadle
US3321592A (en) * 1966-07-21 1967-05-23 Miller Bros Safety closure edge
US3509296A (en) * 1967-10-23 1970-04-28 Ncr Co Resilient variable-conductivity circuit controlling means
US3710050A (en) * 1970-09-14 1973-01-09 A Richards Electronic pressure sensitive switch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305717A (en) * 1939-10-23 1942-12-22 Bell Oidric Joseph La Circuit controlling means
US2445660A (en) * 1945-08-17 1948-07-20 Elevator Supplies Co Inc Electric treadle
US3321592A (en) * 1966-07-21 1967-05-23 Miller Bros Safety closure edge
US3509296A (en) * 1967-10-23 1970-04-28 Ncr Co Resilient variable-conductivity circuit controlling means
US3710050A (en) * 1970-09-14 1973-01-09 A Richards Electronic pressure sensitive switch

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060705A (en) * 1975-04-09 1977-11-29 Cyril John Peachey Pressure actuated continuous switch
US4258100A (en) * 1977-09-09 1981-03-24 Kabushiki Kaisha Kyowa Pressure-sensitive electric conductive sheet material
US4359726A (en) * 1980-02-12 1982-11-16 Jacques Lewiner Composite sheets constituting electromechanical transducers and transducers equipped with such sheets
USRE32180E (en) * 1980-02-12 1986-06-10 Composite sheets constituting electromechanical transducers and transducers equipped with such sheets
US4374374A (en) * 1980-04-17 1983-02-15 Goof Sven Karl Lennart Electric contact device
US4839480A (en) * 1986-11-05 1989-06-13 The Gates Rubber Company Vehicle sensing device
US5068638A (en) * 1988-09-14 1991-11-26 The Gates Rubber Company Electrical sensing element
DE4013624A1 (de) * 1989-04-28 1990-10-31 Riken Kk Quetschsicheres fenster/tuer-schliesssystem sowie sensoren und schaltungen fuer ein solches system
DE4042496C2 (de) * 1989-04-28 1996-03-07 Riken Kk Sicherheitsvorrichtung für ein Fenster oder eine Tür sowie Schaltungen für eine solche Vorrichtung
US4935699A (en) * 1989-05-15 1990-06-19 Westinghouse Electric Corp. Means to detect and locate pinching and chafing of conduits
US7301435B2 (en) 2000-05-18 2007-11-27 Peratech Limited Flexible switching devices
WO2001088935A1 (en) * 2000-05-18 2001-11-22 Peratech Ltd. Flexible switching devices
US7145432B2 (en) 2000-05-18 2006-12-05 Canesis Network Ltd. Flexible switching devices
US20060255903A1 (en) * 2000-05-18 2006-11-16 Peratech Ltd. Flexible switching devices
RU2273911C2 (ru) * 2000-05-18 2006-04-10 Ператек Лтд Гибкие переключающие устройства
US20040252007A1 (en) * 2000-05-18 2004-12-16 David Lussey Flexible switching devices
US7186356B2 (en) 2001-06-07 2007-03-06 Peratech Ltd. Analytical device
US6724195B2 (en) * 2002-03-29 2004-04-20 Jerome R. Lurtz Contact sensor
WO2003085685A3 (en) * 2002-03-29 2004-03-11 Jerome R Lurtz A pressure, temperature and contact sensor
US20030184310A1 (en) * 2002-03-29 2003-10-02 Lurtz Jerome R. Pressure, temperature and contact sensor
US20030184309A1 (en) * 2002-03-29 2003-10-02 Lurtz Jerome R. Sensor for measuring changes in ambient conditions
US20040196050A1 (en) * 2002-03-29 2004-10-07 Lurtz Jerome R. Pressure, temperature and contact sensor
US11329212B2 (en) 2013-03-15 2022-05-10 Nano Composite Products, Inc. Composite conductive foam insole
US10263174B2 (en) 2013-03-15 2019-04-16 Nano Composite Products, Inc. Composite material used as a strain gauge
US10260968B2 (en) 2013-03-15 2019-04-16 Nano Composite Products, Inc. Polymeric foam deformation gauge
US11874184B2 (en) 2013-03-15 2024-01-16 Nano Composite Products, Inc. Composite conductive foam
US10658567B2 (en) 2013-03-15 2020-05-19 Nano Composite Products, Inc. Composite material used as a strain gauge
US9857246B2 (en) 2014-09-17 2018-01-02 Sensable Technologies, Llc Sensing system including a sensing membrane
US11564594B2 (en) 2015-01-07 2023-01-31 Nano Composite Products, Inc. Shoe-based analysis system
US10405779B2 (en) 2015-01-07 2019-09-10 Nano Composite Products, Inc. Shoe-based analysis system
US12220223B2 (en) 2015-01-07 2025-02-11 Nano Composite Products, Inc. Shoe-based analysis system

Also Published As

Publication number Publication date
AU476731B2 (en) 1976-09-30
AU5139673A (en) 1974-07-25
ES411247A1 (es) 1976-02-01
IT977692B (it) 1974-09-20
DE2304595A1 (de) 1973-08-09
GB1406486A (en) 1975-09-17
JPS4888480A (enrdf_load_stackoverflow) 1973-11-20
FR2170084B1 (enrdf_load_stackoverflow) 1976-11-05
FR2170084A1 (enrdf_load_stackoverflow) 1973-09-14

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