US3396252A - Electrical surface switch having improved biasing means - Google Patents

Electrical surface switch having improved biasing means Download PDF

Info

Publication number
US3396252A
US3396252A US598844A US59884466A US3396252A US 3396252 A US3396252 A US 3396252A US 598844 A US598844 A US 598844A US 59884466 A US59884466 A US 59884466A US 3396252 A US3396252 A US 3396252A
Authority
US
United States
Prior art keywords
sheets
conductive
surface switch
intertwining
warps
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
US598844A
Inventor
Serizawa Ryunosuke
Tanaka Kiichi
Tanaka Kuchi
Takamatu Osamu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3396252A publication Critical patent/US3396252A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/02Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14Operating 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
    • H01H3/141Cushion or mat switches

Definitions

  • Ina'conventional'surface switch two upper and lower metal screens are made electrodes and such elastic insulator provided with many holes as a polyester sponge is inserted and bonded between them.
  • the bonding agent will penetrate the sponge to reduce its elasticity and that a part of the bondingagent will: cover the electrode part to make the electriccontact insufiicient. Therefore, the holes made inthe; sponge are of a.diameter of 30 mm. and the dis tance between the holes is about 40 mm.
  • a principal object of the present invention is to provide a surface switch which has an excellent operation.
  • a further object of the present invention is to provide a surface switch which is high in the returning ability and durabilty.
  • Another object of the present nvention is to provide a surface switch which is very easy to mass-produce.
  • Still another object of the present invention is to provide a surface switch which can be used even as rolled.
  • FIGS. 1A and 1B are perspective views of fabrics forming a surface switch of the present invention
  • FIGS. 2A and 2B are sectioned views on planes IIA- IIA and IIB-IIB in FIGS. 1A and 1B, respectively;
  • FIG. 3 is a perspective view of another embodiment
  • FIG. 4 is a sectioned view on plane IVIV in FIG. 3;
  • FIG. 5 is a sectioned view on plane VV in FIG. 3;
  • FIG. 6 shows another embodiment of the fabric
  • B is a conductive fabric whose structure is illustrated in detail in FIG. 2B.
  • 4 is a weft made of metal wires or elastic synthetic fibers and 5 and 6 are warps of a cross-sectional area of less than 0.04 mm. woven with the above mentioned wefts and made of such conductive material as, for example, copper wires or metal foils or impregnated with a conductive paint.
  • a and B are conductive fabrics with which are intertwined elastic and electrically insulative threads 9 and 10.
  • the threads 9 and are intertwined with the warps of the fabrics A and B as illustrated in FIG. 4 in which 1 is a weft of the fabric A, 2 and 3 are warps, 4 is a weft of the fabric B and 5 and 6 are warps.
  • the respective materials of the warp and weft are the same as in the preceding embodiment.
  • the intertwining threads 9 arranged in the longitudinal direction are shown with solid lines in FIG. 4 and are intertwined with the alternate wefts 1 and 4 in the fabrics A and B, respectively.
  • p is the intertwining pitch.
  • the intertwining threads 10 arranged in the lateral direction are shown with broken lines and are intertwined with every fifth warp in each of the fabrics A and B.
  • p' is an intertwining pitch.
  • these intertwining threads are arranged at a desired pitch also in the lateral direction (shown with the arrow in FIG. 3).
  • p is a pitch of the intertwining thread 9.
  • 1 is a pitch of the intertwining thread 10.
  • the pitches p p' and p' p As the planes formed by these two kinds of intertwining threads 9 and 10 intersect at right angles with each other, the space between the fabrics A and B is like being sectioned with small chambers. Through these intertwining threads 9 and 10, the fabrics are opposed to each other with a gap t between them.
  • FIGS. 7 and 8 illustrate an embodiment of the surface switch of the present invention formed in the form of a tape.
  • 1 is aweft and 2
  • 3, 5 and 6 are conductive warps woven with the above mentioned wefts 1.
  • a tape woven of insulative warps 12 and the wefts 1 and a tape woven of insulative warps 13 and the wefts 1 are provided on the respective sides of a conductive tape woven of the warps 2 and 3 with the wefts 1 so as to form a fabric A.
  • a tape woven of insulative warps 14 and the wefts 1 and a tape woven of insulative warps 15 and the wefts 1 are provided on the respective sides of a conductive tape woven of the warps 5 and 6 with the wefts 1 so as to form a fabric B.
  • the threads 12, 13, 14 and 15 are made of polyvinyl alcoholic synthetic fibers or viscose fibers.
  • the intertwining threads 9 are intertwined with the wefts 1and vvarps12 of 'the'fabi'idA' and with the wefts 1 and warps 14 of the fabric B.
  • the intertwining threads 8 are intertwined with the wefts 1 and warps 13 of the fabric A and with the wefts 1 and warps 15 of the fabric B.
  • Said intertwining threads 8 and 9 are made of polyester fibers or polyamide fibers. These fabrics A and B and intertwining threads are woven simultaneously and therefore the surface switch can be very simply made. 7 4
  • the surface switches in the first andssecond, embodiments can be used as enclosed in cases in the same manner as in the third embodiment.
  • An electrical surface switch comprising the combination of a pair of opposed flexible contact sheets made of fabrics having electrically conductive fibers therein for making a desired electrical connectionwhen the opposed surfaces of said sheets are brought into contact with each, and a multiplicity of resilient fibers made of electrically nonconductive material intertwined with the fabric of at least one of said contact sheets and extending between said sheets for normally biasing the contact sheets away from each other to normally open positions, said resilient.
  • fibers being adapted to flex in response to advancing movement of said sheets toward each other to a closed position where the opposed surfaces of said sheets contact each other.
  • An electrical surface switch comprising the combination of a pair of opposed flexible contact sheets at least one of which is made of a woven fabric, said contact sheets having electrically conductive fibers therein and adapted to make a desired electrical connection when the opposed surfaces thereof are brought into contact with each other, and a multiplicity of resilient fibers made of electrically nonconductive material and woven as an in tegral part of the woven fabric of at least one of said contact sheets, said resilient fibers extending between said sheets for normally biasing the sheets away from each other to normally open positions, and flexing in response to movement of said sheets to a closed position where-the opposed surfaces of said sheets contact each other.
  • An electrical surface switch comprising the com:- bination of a pair of opposed flexible contact sheets each of which is made of woven fabric having electricallynonconductive wefts woven with at-least onearea of elec-' trically conductive warps between areas of electrically nonconductive warps, the areas of conductive'warps'being aligned in the two sheets so as to make a de'siredeled trical connection when the opposed surfaces thereof are brought into contact with each other, and a multiplicity of resilient fibers made of electrically nonconductive material interwoven with the fabrics of both of 'said sheets'fi'n the areas of said nonconductive warps and extending between said sheets for biasing the sheets away from each other 5 6 to normally open positions, said fibers flexing in response FOREIGN PATENTS to movement of said sheets to a closed position where 1200 246 12/1959 France the opposed surfaces of said sheets contact each other. 1:253:38) 1/1961 France:

Description

6, 1968 RYUNOSUKE SERIZAWA ET AL 3,396,252
ELECTRICAL SURFACE SWITCH HAVING IMPROVED BIASING MEANS Filed Dec. 2, 1966 5 Sheets-Sheet 1 'lNVENTORS RYUNOSUKE SERIZAWA Kncm TANAKA OSAMU TAKAM U ATTYS,
Aug. 6, 1968 RYUNOSUKE SERIZAWA ET AL ELECTRICAL SURFACE SWITCH HAVING IMPROVED BIASING MEANS Filed Dec. 2, 1966 5 Sheets-Sheet 2 INVENTORS Rvuwosuxe SERIZAWA Kucm TANAKA OSAMU TAKAMATU bg:1t o1f,MW/Vo41'@m ATTYS.
1968 RYUNOSUKE SERIZAWA ET AL 3,396,252
ELECTRICAL SURFACE SWITCH HAVING IMPROVED BIASING MEANS Filed Dec. 2, 1966 5 Sheets-She et :5
mvzzmons RYUNOSUKE SERIZAWA Kucm TANAKA OSAMU TAKAHATU b wag, W 1/041; 0M ArTYS.
1963 RYUNOSUKE SERIZAWA ET AL 3,396,252
ELECTRICAL SURFACE SWITCH HAVING IMPROVED BIASING MEANS Filed Dec. 2, 1966 5 Sheets-Sheet 4.
INVENTORS Rvurnosuxs SERIZAWA Kncm TANAKA OSAMU TAKAMATU b wagmwfl/d 4714* ATTYS.
8 1953 RYUNOSUKE SERIZAWA E Al. 3,396,252
ELECTRICAL SURFACE SWITCH HAVING IMPROVED BIASING MEANS Filed Dec. 2, 1966 5 Sheets-Sheet 5 INVENTORS RYUNOSUKE SERIZAWA Kucm TANAKA smu TAKAMATU 3,396,252 ELECTRICAL SURFACE SWITCH HAVING a IMPROVED BIASING MEANS Ryu'nosuke Serizawa, 3-26, Shimouma-cho, Setagaya- 'ku, Tokyo, Japan; Kiichi Tanaka, Tsu-20, Aza Ryoke, Tsnhata-clio, Kahoku-gun, Ishikawa-ken, Japan; and Osamu Takamatu, 1-23--10 Fukazawa-cho, Setagayaku, Tokyo, Japan Filed Dec. 2, 1966, Ser. No. 598,844 Claims priority, application Japan, Dec. 6, 1965,
Claims. (Cl. 200-86) ABSTRACT OF THE DISCLOSURE i This inve-ntion'relates to a surface switch for which are used fabrics intertwined with elastic and insulative threads.
The surface switches according to the present invention can be applied to'many uses as switches not only for automatic doors but also for automobile doors, safety devices for elevators and others, thief alarms and measuring instruments-For the operation of an automatic door, a mat-shaped surface switch is generally used so that, when anexternal stress is'applied on a part of the surface, two upper'and lower electrode sheets may come into contact with each other to flow an electric current and a relay may be operated with this current to rotate an electric motor to open or 'close the. door. The conditions required of this kind of'surface switch are that (a) it should conduct electricityras soon as a required external stress is applied, .(b) it should return to the original state as soon as'the external stress. is removed, (c) it should operate positively for a long time, (d) it should be easy to make, (c) it shouldbe able to be rolled and (f) it should be cheap.-
. Ina'conventional'surface switch, two upper and lower metal screens are made electrodes and such elastic insulator provided with many holes as a polyester sponge is inserted and bonded between them. However, there are defects vthat it is difficult to bond the metal screen and sponge with each other, that the bonding agent will penetrate the sponge to reduce its elasticity and that a part of the bondingagent will: cover the electrode part to make the electriccontact insufiicient. Therefore, the holes made inthe; sponge are of a.diameter of 30 mm. and the dis tance between the holes is about 40 mm. Thus, in fact, it is difficult, to make the etfective contact area of the electrodes more than /3 ofthe total area. Further, in order to prevent any accidental contact due to the flexing of the electrode surfaces in the position of the hole in the sponge, it is necessary to use thick metal screens and also States Patent 0 ice to make the thickness of the sponge more than 10 mm. Further, it has been impossible to use this mat switch as rolled. Therefore, the conventional surface'switch'does not well meet any of the requirements (a)' to (f) above.
Further, in the above example, it can be thought to use a conductive rubber for the electrode. But, in such case, it will be more difficult than in the case of metal screens to reduce the contact resistance and to improve the conductivity. The present invention has eliminated the above mentioned defects and has realized a surface switch meeting the requirements (a) to (f).
A principal object of the present invention is to provide a surface switch which has an excellent operation.
A further object of the present invention is to provide a surface switch which is high in the returning ability and durabilty.
Another object of the present nvention is to provide a surface switch which is very easy to mass-produce.
Still another object of the present invention is to provide a surface switch which can be used even as rolled.
The present invention shall now be explained with reference to the drawings in which:
FIGS. 1A and 1B are perspective views of fabrics forming a surface switch of the present invention;
FIGS. 2A and 2B are sectioned views on planes IIA- IIA and IIB-IIB in FIGS. 1A and 1B, respectively;
FIG. 3 is a perspective view of another embodiment;
FIG. 4 is a sectioned view on plane IVIV in FIG. 3;
FIG. 5 is a sectioned view on plane VV in FIG. 3;
FIG. 6 shows another embodiment of the fabric;
FIG. 7 is a perspective view of another embodiment;
FIG. 8 is a sectioned view on plane VIIVII in FIG. 7.
In FIG. 1, A is a conductive fabric whose structure is illustrated in detail in FIG. 2A. In the drawing, 1 is a weft made of metal wires or elastic synthetic fibers and 2 and 3 are warps of a cross-sectional area of less than 0.04 mm. woven with the above mentioned wefts and made of such conductive material as, for example, copper wires or metal foils or impregnated with a conductive paint.
In FIG. 1, B is a conductive fabric whose structure is illustrated in detail in FIG. 2B. In the drawing, 4 is a weft made of metal wires or elastic synthetic fibers and 5 and 6 are warps of a cross-sectional area of less than 0.04 mm. woven with the above mentioned wefts and made of such conductive material as, for example, copper wires or metal foils or impregnated with a conductive paint.
7 is a rather thick intertwining thread wiven, for example, in FIG. 2B, so as to be intertwined with two wefts 4, pulled out above the conductive fabric, again intertwined with two wefts 4 and then pulled out. p is a pitch in the longitudinal direction (indicated by the arrow in each of FIGS. 1 and 2) of said intertwining thread and p is a pitch in the lateral direction of the interwining thread. 1 is a height of the intertwining thread. It is preferable that said intertwining thread is made of such synthetic fi'bers, for example, of 50 to 3000 deniers high in the elasticity as polyamide fibers, polyethylene fibers or polyester fibers.
The surface switch of the present invention is formed, for example, by overlapping the conductive fabric A on the side of the conductive fabric B on which the intertwining threads 7 extend so that the conductive fabrics A and B may be opposite each other, a required clearance t may be kept between both conductive fabrics by the elastic and electrically insulative intertwining threads 7 and, when an externalstress is applied on a part of the conductive fabric A, the intertwining threads 7 will flex and therefore the surfaces of the conductive fabrics A and B may come into contact with each other and, when the external stress is removed, the intertwining threads 7 and 8 may return to their original forms due to their elasticity and the contact of the conductive fabrics A and B may be broken. Therefore, the present invention operates as asurface switch having the conductive fabrics A and B as electrode surfaces.
.The conductive fabric B to be used for the surface switch of the present invention can 'be easily made by intertwining the threads simultaneously with weaving the fabric. Also the conductive fabric A can be easily massproduced in the same manner. Further, a switch can be formed by making the conductive fabrics A and B thin and the clearance t small. In the operation, when an external stress is applied, a contact of large conductive surfaces will taken place and, as soon as the external stress is removed, it will return to the original state. The durability of the elastic fibers is so high that the switch is endurable to the use for a long period. Further, this switch can be used also as rolled.
FIGS. 3 to illustrate other embodiments. In the drawings, A and B are conductive fabrics with which are intertwined elastic and electrically insulative threads 9 and 10. The threads 9 and are intertwined with the warps of the fabrics A and B as illustrated in FIG. 4 in which 1 is a weft of the fabric A, 2 and 3 are warps, 4 is a weft of the fabric B and 5 and 6 are warps. The respective materials of the warp and weft are the same as in the preceding embodiment.
- The intertwining threads 9 arranged in the longitudinal direction are shown with solid lines in FIG. 4 and are intertwined with the alternate wefts 1 and 4 in the fabrics A and B, respectively. p is the intertwining pitch. The intertwining threads 10 arranged in the lateral direction are shown with broken lines and are intertwined with every fifth warp in each of the fabrics A and B. p' is an intertwining pitch.
Further, these intertwining threads are arranged at a desired pitch also in the lateral direction (shown with the arrow in FIG. 3). p is a pitch of the intertwining thread 9. 1 is a pitch of the intertwining thread 10. The pitches p p' and p' p As the planes formed by these two kinds of intertwining threads 9 and 10 intersect at right angles with each other, the space between the fabrics A and B is like being sectioned with small chambers. Through these intertwining threads 9 and 10, the fabrics are opposed to each other with a gap t between them.
In the production, the fabrics A and B and the intertwining threads can be simultaneously woven instead of separately making the fabrics A and B. Therefore, the surface switch can be easily made. The material of the intertwining thread to be used is the same as in the preceding example.
FIG. 6 illustrates another embodiment of the formation of the fabrics. For the formation of the wefts, the warps 2 are so arranged as to skip several wefts so that the conducting area may be increased.
FIGS. 7 and 8 illustrate an embodiment of the surface switch of the present invention formed in the form of a tape. In the drawings, 1 is aweft and 2, 3, 5 and 6 are conductive warps woven with the above mentioned wefts 1. A tape woven of insulative warps 12 and the wefts 1 and a tape woven of insulative warps 13 and the wefts 1 are provided on the respective sides of a conductive tape woven of the warps 2 and 3 with the wefts 1 so as to form a fabric A. In the same manner, a tape woven of insulative warps 14 and the wefts 1 and a tape woven of insulative warps 15 and the wefts 1 are provided on the respective sides of a conductive tape woven of the warps 5 and 6 with the wefts 1 so as to form a fabric B. The threads 12, 13, 14 and 15 are made of polyvinyl alcoholic synthetic fibers or viscose fibers. The intertwining threads 9 are intertwined with the wefts 1and vvarps12 of 'the'fabi'idA' and with the wefts 1 and warps 14 of the fabric B. The intertwining threads 8 are intertwined with the wefts 1 and warps 13 of the fabric A and with the wefts 1 and warps 15 of the fabric B. Said intertwining threads 8 and 9 are made of polyester fibers or polyamide fibers. These fabrics A and B and intertwining threads are woven simultaneously and therefore the surface switch can be very simply made. 7 4
11 is a tubular cover made of such elastic insulative material as rubber or syntheticfresin to enclose theabove mentioned switch elements. By fusing the" tube at both ends, the switch elements within it can be. prevented from being influenced by moisture and dust. g 4 r The surface switches in the first andssecond, embodiments can be used as enclosed in cases in the same manner as in the third embodiment.
While there has been described in connection with the preferred embodiment of this invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention, and it is aimed, therefore, to cover in the appended claims all such changes and modifications as fall within the true spirit and scope of the invention.
What is claimed is:
1. An electrical surface switch comprising the combination of a pair of opposed flexible contact sheets made of fabrics having electrically conductive fibers therein for making a desired electrical connectionwhen the opposed surfaces of said sheets are brought into contact with each, and a multiplicity of resilient fibers made of electrically nonconductive material intertwined with the fabric of at least one of said contact sheets and extending between said sheets for normally biasing the contact sheets away from each other to normally open positions, said resilient.
fibers being adapted to flex in response to advancing movement of said sheets toward each other to a closed position where the opposed surfaces of said sheets contact each other.
2. An electrical surface switch as defined in claim 1 in which said flexible contact sheets and said resilient fibers are enclosed within a flexible sheath made of an electrically insulating material.
3. An electrical surface switch comprising the combination of a pair of opposed flexible contact sheets at least one of which is made of a woven fabric, said contact sheets having electrically conductive fibers therein and adapted to make a desired electrical connection when the opposed surfaces thereof are brought into contact with each other, and a multiplicity of resilient fibers made of electrically nonconductive material and woven as an in tegral part of the woven fabric of at least one of said contact sheets, said resilient fibers extending between said sheets for normally biasing the sheets away from each other to normally open positions, and flexing in response to movement of said sheets to a closed position where-the opposed surfaces of said sheets contact each other.
4. An electrical surface switch as defined in claim 3 in which said flexible contact sheets and said resilient fibers are enclosed within a flexible sheath made of an electrical- 1y insulating material.
5. An electrical surface switch comprising the com:- bination of a pair of opposed flexible contact sheets each of which is made of woven fabric having electricallynonconductive wefts woven with at-least onearea of elec-' trically conductive warps between areas of electrically nonconductive warps, the areas of conductive'warps'being aligned in the two sheets so as to make a de'siredeled trical connection when the opposed surfaces thereof are brought into contact with each other, and a multiplicity of resilient fibers made of electrically nonconductive material interwoven with the fabrics of both of 'said sheets'fi'n the areas of said nonconductive warps and extending between said sheets for biasing the sheets away from each other 5 6 to normally open positions, said fibers flexing in response FOREIGN PATENTS to movement of said sheets to a closed position where 1200 246 12/1959 France the opposed surfaces of said sheets contact each other. 1:253:38) 1/1961 France:
References Cited 5 ROBERT K. SCHAEFER, Primary Examiner. UNITED STATES PATENTS H. 0. JONES, Assistant Examiner.
3,056,005 9/1962 Larson 200-86
US598844A 1965-12-06 1966-12-02 Electrical surface switch having improved biasing means Expired - Lifetime US3396252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7494865 1965-12-06

Publications (1)

Publication Number Publication Date
US3396252A true US3396252A (en) 1968-08-06

Family

ID=13562045

Family Applications (1)

Application Number Title Priority Date Filing Date
US598844A Expired - Lifetime US3396252A (en) 1965-12-06 1966-12-02 Electrical surface switch having improved biasing means

Country Status (2)

Country Link
US (1) US3396252A (en)
FR (1) FR1504154A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458673A (en) * 1968-05-03 1969-07-29 Us Army Crush switch
US3735380A (en) * 1971-03-02 1973-05-22 Switches Inc Seat sensing mechanism
US4164634A (en) * 1977-06-10 1979-08-14 Telaris Telecommunications, Inc. Keyboard switch assembly with multiple isolated electrical engagement regions
US4404558A (en) * 1981-04-15 1983-09-13 Anderson Yen Electrical control circuit for operating a garage door or similar device
US5089672A (en) * 1990-09-19 1992-02-18 Miller Edge, Inc. Flexible electrically conductive contact for a switch which is actuated upon force being applied thereto
DE19510617A1 (en) * 1995-03-23 1996-09-26 Leon Helma Christina Flexible contact mat e.g. for pressure sensitive switching device
WO2001075924A1 (en) * 2000-03-30 2001-10-11 Electrotextiles Company Limited Detector constructed from electrically conducting fabric
US20120156926A1 (en) * 2010-12-15 2012-06-21 Toyota Boshoku Kabushiki Kaisha Connection member, method of manufacturing the same and connection structure
US10151131B2 (en) 2016-01-13 2018-12-11 Miller Edge, Inc. Combination contact and non-contact sensing edge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1200246A (en) * 1957-03-05 1959-12-18 Electrofilm heating element comprising a conductive mesh
FR1253380A (en) * 1959-12-31 1961-02-10 Tubest Sa Contactor mat
US3056005A (en) * 1960-08-04 1962-09-25 Harry J Larson Mat switch and method of making the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1200246A (en) * 1957-03-05 1959-12-18 Electrofilm heating element comprising a conductive mesh
FR1253380A (en) * 1959-12-31 1961-02-10 Tubest Sa Contactor mat
US3056005A (en) * 1960-08-04 1962-09-25 Harry J Larson Mat switch and method of making the same

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458673A (en) * 1968-05-03 1969-07-29 Us Army Crush switch
US3735380A (en) * 1971-03-02 1973-05-22 Switches Inc Seat sensing mechanism
US4164634A (en) * 1977-06-10 1979-08-14 Telaris Telecommunications, Inc. Keyboard switch assembly with multiple isolated electrical engagement regions
US4404558A (en) * 1981-04-15 1983-09-13 Anderson Yen Electrical control circuit for operating a garage door or similar device
US5089672A (en) * 1990-09-19 1992-02-18 Miller Edge, Inc. Flexible electrically conductive contact for a switch which is actuated upon force being applied thereto
DE19510617A1 (en) * 1995-03-23 1996-09-26 Leon Helma Christina Flexible contact mat e.g. for pressure sensitive switching device
WO2001075924A1 (en) * 2000-03-30 2001-10-11 Electrotextiles Company Limited Detector constructed from electrically conducting fabric
US20020134116A1 (en) * 2000-03-30 2002-09-26 Sandbach David Lee Detector constructed from electrically conducting fabric
US7161084B2 (en) 2000-03-30 2007-01-09 Electrotextiles Company Limited Detector constructed from electrically conducting fabric
US20120156926A1 (en) * 2010-12-15 2012-06-21 Toyota Boshoku Kabushiki Kaisha Connection member, method of manufacturing the same and connection structure
US8721362B2 (en) * 2010-12-15 2014-05-13 Toyota Boshoku Kabushiki Kaisha Connection member, method of manufacturing the same and connection structure
US10151131B2 (en) 2016-01-13 2018-12-11 Miller Edge, Inc. Combination contact and non-contact sensing edge

Also Published As

Publication number Publication date
FR1504154A (en) 1967-12-01

Similar Documents

Publication Publication Date Title
US3396252A (en) Electrical surface switch having improved biasing means
EP1269406B1 (en) Conductive pressure sensitive textile
US3125739A (en) Electric controller
US4792662A (en) Sheet electrical heating element
US4060705A (en) Pressure actuated continuous switch
DE2805722C2 (en)
US2668218A (en) Translatory potentiometer
US2445660A (en) Electric treadle
KR880009395A (en) Conducting Tate for Electric Fence
US3185803A (en) Push button switch with flexible contact
EP1865331A2 (en) Electric/electronic device
US4158103A (en) Electric woven switching matrix
ZA200208215B (en) Conductive pressure sensitive textile.
KR930011257B1 (en) Method of manufacturing a heatable glass pane and screen printing pattern for carrying out the method
JPH10144168A (en) Planar switch
US3193630A (en) Multiple contact switch having cable switch operating means
GB2306760A (en) Flexible electric cable and its application
EP2090906A2 (en) Optical sensor
EP0395784B1 (en) Electrical switch mat
US3437973A (en) Electrical switch
US4367771A (en) Connecting part for electrical warp stop motion on weaving machines
DE102013215719B3 (en) Buttonmodul
US3825277A (en) Mat switch
GB2166295A (en) Flexible electric switch
JPH08134741A (en) Conductive woven fabric