US3617666A - Pressure-operated layered electrical switch and switch array - Google Patents

Pressure-operated layered electrical switch and switch array Download PDF

Info

Publication number
US3617666A
US3617666A US3617666DA US3617666A US 3617666 A US3617666 A US 3617666A US 3617666D A US3617666D A US 3617666DA US 3617666 A US3617666 A US 3617666A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
layer
pressure
switch
nonconductive
sheet
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
Inventor
Charles E Braue
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.)
DATA APPLIANCE CORP
Original Assignee
DATA APPLIANCE CORP
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
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/807Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the spatial arrangement of the contact sites, e.g. superimposed sites
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00Form of contacts
    • H01H2203/008Wires
    • H01H2203/01Woven wire screen
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00Form of contacts
    • H01H2203/032Metal foil
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00Layers
    • H01H2209/002Materials
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00Layers
    • H01H2209/016Protection layer, e.g. for legend, anti-scratch
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00Layers
    • H01H2209/024Properties of the substrate
    • H01H2209/028Paper
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00Tactile feedback
    • H01H2215/03Sound
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00Facilitation of operation; Human engineering
    • H01H2217/026Pencil operated
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00Legends
    • H01H2219/002Legends replaceable; adaptable
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00Actuators
    • H01H2221/064Limitation of actuating pressure
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00Switch site location
    • H01H2225/002Switch site location superimposed
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00Manufacturing
    • H01H2229/024Packing between substrate and membrane
    • H01H2229/028Adhesive
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00Applications
    • H01H2231/034Coordinate determination
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00Applications
    • H01H2231/038Level sensing or limit switch
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00Miscellaneous
    • H01H2239/03Avoiding erroneous switching

Abstract

A pressure-operated electrical switch unit having a layered construction including a substantially planar surface to which pressure is applied to close the switch. The removal of the pressure opens the switch. The switch includes a layer having at least one elongated opening in it which permits portions of the layer to be deflected into an opening in an adjacent layer to move one electrically conductive layer to complete the electrical circuit. An array of the switches may be used for supplying signals created by the pressure of a writing instrument.

Description

United States Patent [72] Inventor Charles E. Braue Crestwood, N.Y. [211 App]. No. 33,367 [22] Filed Apr. 30, 1970 [45] Patented Nov. 2, 1971 73] Assignee Data Appliance Corporation [54] PRESSURE-OPERATED LAYERED ELECTRICAL SWITCH AND SWITCH ARRAY 12 Claims, 7 Drawing Figs. [52] U.S. Cl. 200/86, 200/46, 235/6l.1 [51] int. Cl H0lh 43/08 [50] Field of Search 200/46, 159, 86; 340/272 [56] References Cited UNITED STATES PATENTS 3,056,005 9/1962 Larson 200/86 R 3,308,253 3/l967 Krakinowski OTHER REFERENCES Brook et al., Programming Elastic Diaphragm Switching Matrix by Small Balls," IBM Tech. Disclosure Bull., Vol. 10, No. 1], April, 1968, (copy 200- 246). Primary Examiner-David Smith, Jr. Att0meyPennie, Edmonds, Morton, Taylor and Adams ABSTRACT: A pressure-operated electrical switch unit having a layered construction including a substantially planar surface to which pressure is applied to close the switch. The removal of the pressure opens the switch. The switch includes a layer having at least one elongated opening in it which permits portions ofthe layer to be deflected into an opening in an adjacent layer to move one electrically conductive layer to complete the electrical circuit. An array of the switches may be used for supplying signals created by the pressure ofa writing instrument.

PATENTEDHOV 2 m V 3,617, 666

1 I 1; i LEI L 22 IN VIa'N'l'l m. CHARLES E. BRAUE ATTORNEYS BACKGROUND OF THE INVENTION a force to thereby move a conductive material which is secured to the underside of the diaphragm into contact with a second conductive material. Upon removing the force, the elastomer diaphragm restores itself to its original position.

Switches of this design have the disadvantage of being over sensitive to a force applied over a'larger area since elastomer materials are readily deformed. When a plurality of these switches are used in a multiple switch unit for recording handwriting or other marks made using a writing instrument, such as a pen, pencil or stylus, the varying degrees of pressure applied by portions of the hand including, in particular, the

knuckle of the little finger, as it rests on and moves over the switches will cause certain of switches to be unintentionally closed. The problem of inadvertent closing of switches has not heretofore been solved. n the other hand, the closing of each switch must easily be done so as not to tire an operator who may be called on to close many switches at one sitting.

A pressure-sensitive switch which will operate reliably for extended periods of time to close upon the application of a selected pressure which is within the range of normal writing instrument pressures and which will not respond to forces below that minimum is not disclosed in the published literature nor available to industry.

SUMMARY OF THE INI IENTION Broadly, the present invention is a switch device operable by the selective application of pressure to an area of the device which causes a sheet having deflectable portions created by an elongated opening in the sheet. The deflection of these portions against a first conductive layer moves that layer against a second layer which is normally spaced from the first layer thus completing an electrical circuit. When the pressure is released, the deflected portions move back to their inactive position allowing the normally spaced-apart layers to move apart and open the circuit.

' It is a feature of the device that it is capable of providing signals for recording through the normal use of a pencil or stylus as the pressure-applying means. Preferably a checkoff fonn or other piece of paper is placed over the switch which paper delineates the areas to which pressure may be applied through use of a writing instrument. When an intentional and sufficient pressure has been applied to an area, the closing of the switch may cause an audible sound to be heard to notify the operator that the switch closed.

It is also a feature that the deflective action of the nonconductive layer cooperates advantageously with conductive layers made of flexible fabric having a conductive oxide coatmg.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, FIG. 1 is a plan view, partially broken away, showing a plurality of switches in a grid arrangement; FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 with a pencil point touching but not applying pressure to the surface; and FIG. 3 is a sectional view, similar to FIG. 2, showing the switch having pressure applied to it.

FIG. 3a is an enlarged partial view of FIG. 2 showing conductive fabric layers moved into engagement; FIG. 4 is an enlarged plan view of the switch and FIG. 5 is a further embodiment showing a three-element switch using three layers of conductive fabric; FIG. 6 is an enlarged partial view of FIG. 5 showing conductive fabric layers moved into engagement.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1, 2 and 3, switch unit 1 is constructed of a plurality of layers including a baseplate 2 made of electrically nonconductive material, such as plastic or paper board, a lower layer of fabric 3, a separatorsheet 4, a second layer of fabric 5, an electrically nonconductivesubstantially noncompressible deflector layer 6 and finally a pressure-transmitting protective sheet 7. These layers may be held together by adhering, clamping or otherwise securing their edges together to provide a seal preventing the water, dirt or bacteria from entering between the layers. The interior surfaces of the layers are not attached to. allowthe relative movementnecessary to the proper functioning of each switch. A sheet of paper 8 including portions indicating where marks should be made is placed on top of the unit and is marked with a pencil point 9 or other writing instrument.

Individual switches 11 are formed by the portions of the layers in and around circular opening 12 of separator sheet 4. Each switch 11, is similarly constructed, with fabric layers 3 and 5 each having, alternatively, an electrically conductive row 13 and a nonconductive row 14. The conductive rows 13 of layer 3 run perpendicular to rows 13 of layer 5. The fabric may be made in any conventional manner, such as be weaving, natting or knitting. It is required that at least the nonconductive rows of the fabric be manufactured from nonconductive fibers which may be made of any fiber, natural or synthetic, such as nylon, polyesters or silk. The conductive rows are made by coating those portions with a thin coating of an electrically conductive metal, such as silver or chromium. Alloys of the metals may also be used. A coating which is effectively continuous over the fabric portion having a thickness of about 1X10 to 40x10" inches is operable with the thickness of 2X10 to 6X10 inches being preferred. The coating is thin enough and adhered to, or absorbed in the fibers to prevent the fibers or significant groups of fibers from becoming attached one to another to reduce the flexibility of the fabric. The coating must also extend over portions of contiguous fibers, including those at the surfaces and in the interior, to assure a complete electrical engagement of fibers throughout the fabric portions. Fibers having denier in the range of 0.5 to 10 are preferred.

The coatings may be applied using the method disclosed in the U.S. Pats. Nos. 2,511,472, 2,867,552, 2,896,570, 2,897,091, 3,014,818, 3,043,796 and 3,862,783. These patents include methods for coating the fibers before the fabric is made and provide a coating that will not wear, crack or flake during use in the switch arrangement herein disclosed.

The entire section of fabric to be used in a switch arrangement may be coated and thereafter the coating in the row areas desired to be nonconductive removed by using a suitable solvent. Alternatively, the strips of fabric may be manufactured having conductive properties and having nonconductive properties and the rows thereafter attached together by sewing, adhesives or other suitable means. Preferable the metal coatings used will be resistant to corrosion in the environment herein disclosed.

Fabric layers 3 and 5 have the properties of flexibility and corrosion resistance and, in particular, layer 5 has the ability to repeatedly respond to movement of the deflector layer 6 and to thereafter restore itself to a position in which the layer is in a plane. Layers 3 and 5 may also be made of other materials, such as flexible plastic sheets with portions of conductive material adhered to areas of the sheet to provide rows 13 and 14; however, the material should be able to be repeatedly deflected into openings 12 and thereafter be able to restore itself as the pressure is released.

Row 13 is positioned to pass over or under an openings 12 so that as pressure is applied to deflection layer 6 portions of the layer 6 deflect into openings 12, as generally shown in FIG. 4, to urge a portion of an upper row 13 against a portion of lower row 13.

Referring in particular to FIGS. 3 and 4, it is seen that the application of pressure by pencil point 9 causes lip portions 19 and 19a located adjacent each opening 12 of layer 6 to be deflected downward in a cantilever action. As portions 19 and 19a move downward edges 17 and 17a of the lips move further apart. The action of the slit adjacent lip portions 19 and 19a create a contact area 18 of fabric-to-fabric engagement when the pencil point 9 is urged downward. Each lip 19 and 19a assumes a generally semicircular shape 'as it bends downward. When the pressure is removed the lips move back into the plane of the remainder of layer 6. Where the application of pressure by the pencil point is not in the central area of opening 12 the configurations of movement of the lips and size and shape of area 18 will both vary; however, application of sufficient pressure applied anywhere within the circumference of circular opening 12 will cause two areas of rows 13 to engage to close the switch. Even when pressure is not equally applied to each lip, the ability of each lip to move independently permits a fabric-to-fabric engagement.

The cantilever action of lip portions 19 and 190 also assists in preventing a permanent set or dimple being placed in protective sheet 7. The force of the pencil point deflects sheet 7 into an arcuate shape (FIG. 3) as lips 19 and 19a move in the manner herein described thus reducing the pressure on sheet 7 and preventing dimpling of the sheet.

Protective sheet 7 is preferably made of Mylar brand polyester film, sold by E. l. duPont de Nemours Company. Other types of material may be used if they are sufficiently resilient to resist the formation of dimples in the surface. Separator layer 4 and nonconductive deflection layer 6 may also be made of Mylar or other material. With respect to separator layer 4 it is necessary that the material be sufficiently incompressible to prevent lips 19 and 190 from compressing the portion of layer 4 near opening 12 and interferring with the bending action of deflection lips 19 and 19a. Deflection in the manner shown in FIGS. 2 and 3 without substantial deformation layer 4 is required so that normal pencil point pressure will close the switch while a lesser pressure will not activate the switch. Rows 13 are connected through terminals 21 of leads 22 to connect the electrical circuits with switches 11. Any suitable arrangement of switches can be used.

Turning to FIG. 3a, the engagement of two portions of row 13 conductive fabric is shown in which the interwoven sets of fibers 24 and 25 are shown in engagement at a plurality of points. The conductive fabric provides a plurality of electrical contacts to assure the completion of the electrical circuit when the deflection layer 6 is operated to move the upper fabric down into engagement with layer fabric 3.

An alternative embodiment of the invention is shown in F I05. 5 and 6 having three layers of conductive fabric including the additional intermediate layer 26 and additional separator layer 4a. As shown in FIG. 6, deflection lips 19 and 19a operate in the same manner as the switch described above except that after initial engagement of the upper fabric and intermediate fabric they continue their movement downward into engagement with the lower fabric layer to complete a three-element switch.

The switch of this invention is also useful in responding to pressure applied by liquid pressure, for example, the depth of a liquid could be sensed by the pressure required to close the switch.

An array of switches may be used to record the information on a checkoff sheet where a audible signal tells the operator that each check mark has been effective to close a switch and in which scanning of all switch points to register the closed switches can be accomplished by using the electronic keyboard art techniques.

lcluim:

1. An electrical switch which is closed by the application of pressure against an area of the switch and is opened when the pressure is removed comprising a. an electrically nonconductive base;

b. a first electrically conductive layer positioned against such base;

c. a nonconductive separator means placed against the side of the conductive layer opposite the base, said separator means having an opening therein;

d. a second electrically conductive layer placed against the side of the separator means opposite the first conductive layer;

e. a layer of nonconductive noncompressible material placed against the side of the second electrically conductive layer opposite the nonconductive layer means, said noncompressible layer having an elongated opening positioned adjacent the opening in the separator means; and

f. a pressure-responsive deflectable portion of the noncompressible layer positioned adjacent the opening capable of being deflected down into said opening whereby the application of pressure transmitted to and against the pressure-responsive deflectable portion causes said portion to move a portion of the second conductive layer against the first conductive layer to close the switch.

2. The switch of claim 1 in which the conductive layers are fabrics having electrically conductive material coated thereon.

3. The switch of claim 1 in which the pressure-responsive deflectable portion of the noncompressible layer includes a plurality of lip means adjacent an elongated opening in said noncompressible layer which lip means are capable of being deflected down into said opening in the separator means.

4. The switch of claim 1 having a sheet positioned in engagement with the noncompressible layers for receiving applied pressure which is in turn transmitted to said noncompressible layer.

5. An array of pressure-operated electrical switches arranged in a unit comprising a. an electrically nonconductive baseplate forming the base of the switches,

b. a fabric layer positioned on the baseplate and having electrically conductive portions,

c. a nonconductive separator layer placed against the side of the fabric opposite the plate, said separator having a plurality of openings therein,

d. a second fabric layer having electrically conductive portions and electrically nonconductive portions positioned on the separator layer, and

e. a nonconductive noncompressible deflection sheet placed on the second layer, said sheet having deflectable portions in alignment with said openings in the separator layer to permit the deflectable portions to be deflected against the second layer of fabric, said layer having slits therein.

6. The array of claim 5 in having in addition a protective sheet positioned on the noncompressible deflection sheet on which pressure is directly applied.

7. The array of claim 5 in which layers having conductive and nonconductive portions are nylon fabric in which the conductive portions includes woven fibers coated with silver metal.

8. The switch of claim 1 in which the base and the first electrically conductive layer comprise a nonconductive sheet material having selected areas of conductive material adhered to the sheet material.

9. The array of claim 5 in which the base and the first electrically conductive layer comprise a nonconductive sheet material having selected areas of conductive material adhered to the sheet material.

10. The array of claim 5 having positioned thereon a sheet of material having delineated areas which indicate where pressure may be effectively applied.

11. An array of claim 5 capable of responding to the application of pressure of a writing instrument and having positioned thereon a sheet of material havihg delineated areas indicating where pressure may be effectively applied by such instrument.

12. The array of claim 11 in which the sheet is capable of recording marks made by such instrument. 5

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,617,666 Dated November 2, 1971 IHVEMOHS) Charles E. Braue It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 2, line 39 "1 X 10 to 40 x 10 should read 1 x 10' to 40 x 10' line 40, "2 x 10 to 6 x 10 should read 2 x 10' to 6 x 10 Signed and sealed this 30th day of May 1972.

(SEAL) Attest:

ROBERT GOTTSCHALK EDWARD M. FLETCHER,JR.

Commissioner of Patents Attesting Officer

Claims (12)

1. An electrical switch which is closed by the application of pressure against an area of the switch and is opened when the pressure is removed comprising a. an electrically nonconductive base; b. a first electrically conductive layer positioned against such base; c. a nonconductive separator means placed against the side of the conductive layer opposite the base, said separator means having an opening therein; d. a second electrically conductive layer placed against the side of the separator means opposite the first conductive layer; e. a layer of nonconductive noncompressible material placed against the side of the second electrically conductive layer opposite the nonconductive layer means, said noncompressible layer having an elongated opening positioned adjacent the opening in the separator means; and f. a pressure-responsive deflectable portion of the noncompressible layer positioned adjacent the opening capable of being deflected down into said opening whereby the application of pressure transmitted to and against the pressure-responsive deflectable portion causes said portion to move a portion of the second conductive layer against the first conductive layer to close the switch.
2. The switch of claim 1 in which the conductive layers are fabrics having electrically conductive material coated thereon.
3. The switch of claim 1 in which the pressure-responsive deflectable portion of the noncompressible layer includes a plurality of lip means adjacent an elongated opening in said noncompressible layer which lip means are capable of being deflected down into said opening in the separator means.
4. The switch of claim 1 having a sheet positioned in engagement with the noncompressible layers for receiving applied pressure which is in turn transmitted to said noncompressible layer.
5. An array of pressure-operated electrical switches arranged in a unit comprising a. an electrically nonconductive baseplate forming the base of the switches, b. a fabric layer positioned on the baseplate and having electrically conductive portions, c. a nonconductive separator layer placed against the side of the fabric opposite the plate, said separator having a plurality of openings therein, d. a second fabric layer having electrically conductive portions and electrically nonConductive portions positioned on the separator layer, and e. a nonconductive noncompressible deflection sheet placed on the second layer, said sheet having deflectable portions in alignment with said openings in the separator layer to permit the deflectable portions to be deflected against the second layer of fabric, said layer having slits therein.
6. The array of claim 5 in having in addition a protective sheet positioned on the noncompressible deflection sheet on which pressure is directly applied.
7. The array of claim 5 in which layers having conductive and nonconductive portions are nylon fabric in which the conductive portions includes woven fibers coated with silver metal.
8. The switch of claim 1 in which the base and the first electrically conductive layer comprise a nonconductive sheet material having selected areas of conductive material adhered to the sheet material.
9. The array of claim 5 in which the base and the first electrically conductive layer comprise a nonconductive sheet material having selected areas of conductive material adhered to the sheet material.
10. The array of claim 5 having positioned thereon a sheet of material having delineated areas which indicate where pressure may be effectively applied.
11. An array of claim 5 capable of responding to the application of pressure of a writing instrument and having positioned thereon a sheet of material having delineated areas indicating where pressure may be effectively applied by such instrument.
12. The array of claim 11 in which the sheet is capable of recording marks made by such instrument.
US3617666A 1970-04-30 1970-04-30 Pressure-operated layered electrical switch and switch array Expired - Lifetime US3617666A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US3336770 true 1970-04-30 1970-04-30
USRE28365E USRE28365E (en) 1970-04-30 1973-06-27 Pressure-operated layered electrical switch and switch array

Publications (1)

Publication Number Publication Date
US3617666A true US3617666A (en) 1971-11-02

Family

ID=26709614

Family Applications (2)

Application Number Title Priority Date Filing Date
US3617666A Expired - Lifetime US3617666A (en) 1970-04-30 1970-04-30 Pressure-operated layered electrical switch and switch array
USRE28365E Expired USRE28365E (en) 1970-04-30 1973-06-27 Pressure-operated layered electrical switch and switch array

Family Applications After (1)

Application Number Title Priority Date Filing Date
USRE28365E Expired USRE28365E (en) 1970-04-30 1973-06-27 Pressure-operated layered electrical switch and switch array

Country Status (4)

Country Link
US (2) US3617666A (en)
DE (1) DE2120771A1 (en)
FR (1) FR2090978A5 (en)
GB (1) GB1308575A (en)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708654A (en) * 1971-05-26 1973-01-02 Bennett Pump Inc Reader system for conventional credit cards
US3718791A (en) * 1971-09-16 1973-02-27 Gen Motors Corp Pressure responsive switch
US3911215A (en) * 1974-03-18 1975-10-07 Elographics Inc Discriminating contact sensor
US3969595A (en) * 1974-09-23 1976-07-13 Xerox Corporation Sequential switching assembly having plural, spaced flexible contact layers
US3996430A (en) * 1974-05-07 1976-12-07 Preh Elektrofeinmechanische Werke Keyboard switch assembly having multilayer printed circuit structure
US4044642A (en) * 1973-07-23 1977-08-30 Arp Instruments, Inc. Touch sensitive polyphonic musical instrument
US4065652A (en) * 1974-09-27 1977-12-27 Telefonaktiebolaget L M Ericsson Contact assembly and mounting structure for cross bar selector switch
US4090045A (en) * 1975-12-15 1978-05-16 Marsh Products, Inc. Keyboard strip switch assembly having multifurcated conductive screen contact with contact cleaning wiping-action
US4137116A (en) * 1977-04-22 1979-01-30 Miller Brothers Method of making a pressure switch
US4194097A (en) * 1978-06-12 1980-03-18 Ncr Corporation Membrane keyboard apparatus with tactile feedback
US4207444A (en) * 1976-08-09 1980-06-10 Kley, Fitting, Fitting, Nalley And Smith Planar multiple switch
US4304991A (en) * 1979-09-26 1981-12-08 Weber Harold J Indicia sensor apparatus
US4349710A (en) * 1979-03-12 1982-09-14 Miller Norman K Door edge for attachment to a train door and the like
US4362911A (en) * 1980-09-17 1982-12-07 Ncr Corporation Membrane keyboard switch assembly having selectable tactile properties
US4375585A (en) * 1981-01-08 1983-03-01 Atari, Inc. Deformable switch keyboard
JPS58107522U (en) * 1982-01-18 1983-07-22
DE3345846A1 (en) * 1983-01-31 1984-04-19 Alps Electric Co Ltd input unit
US4467151A (en) * 1982-12-13 1984-08-21 Control Data Corporation Planar touch panel
US4555954A (en) * 1984-12-21 1985-12-03 At&T Technologies, Inc. Method and apparatus for sensing tactile forces
US4559015A (en) * 1984-07-09 1985-12-17 Arthur Felesky Method and means of testing and refining bicycle riding skills
US4603241A (en) * 1983-10-21 1986-07-29 Eliana Nardi Elastic strip with contacts for detecting the transit of motor vehicles with a protection against wear
US4700025A (en) * 1986-05-23 1987-10-13 Alps Electric Co., Ltd. Transparent touch-sensitive panel
US4990900A (en) * 1987-10-01 1991-02-05 Alps Electric Co., Ltd. Touch panel
US5071702A (en) * 1987-09-24 1991-12-10 Mitsui Petrochemical Industries, Ltd. Laminated plate for high frequency
US5140107A (en) * 1991-07-02 1992-08-18 Ncr Corporation Digitizer screen and method of making
US5184831A (en) * 1991-10-17 1993-02-09 Lee Garner Karate scoring apparatus
US6307168B1 (en) * 1999-03-23 2001-10-23 Paul Newham Linear spaced dielectric dot separator pressure sensing array incorporating strain release stabilized releasable electric snap stud connectors
US20020134116A1 (en) * 2000-03-30 2002-09-26 Sandbach David Lee Detector constructed from electrically conducting fabric
US6639162B2 (en) * 2000-03-30 2003-10-28 Electrotextiles Company Limited Input device
US6652123B2 (en) * 2001-05-07 2003-11-25 Jiahn-Chang Wu Light emitting diode display having heat sinking circuit rails
US20040154908A1 (en) * 2001-06-19 2004-08-12 Helmut Friedrich Safety contact mat
WO2005091322A1 (en) * 2004-03-18 2005-09-29 Eleksen Limited Sensor assembly
US20060071751A1 (en) * 2002-04-30 2006-04-06 Koninklijke Philips Electronics N.V. Switch
US20060086026A1 (en) * 2004-10-27 2006-04-27 Stanley Ho Customizable floor mats and vertical displays
US20070120707A1 (en) * 2005-11-29 2007-05-31 Rv Insite, Inc. Method for positioning recreational vehicles and portable position sensor and alert system for recreational vehicles and other vehicles
US20090068857A1 (en) * 2005-05-06 2009-03-12 Abatek International Ag Electrically conducting contact and method for production thereof
WO2010034166A1 (en) * 2008-09-27 2010-04-01 Li Xiaoyu Flexible switchboard
US20140015633A1 (en) * 2011-03-25 2014-01-16 Panasonic Corporation Pressure-sensitive switch
WO2016048741A1 (en) * 2014-09-24 2016-03-31 Arimtax Technologies Llc Three-dimensional fabric with embedded input-output devices

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1562264A (en) * 1976-11-22 1980-03-12 Control Data Corp Electric switch matrix
GB2064873B (en) * 1979-11-26 1984-09-05 Eventoff Franklin Neal Pressure sensitive electric switch
US4471177A (en) * 1982-08-13 1984-09-11 Press On, Inc. Enlarged switch area membrane switch and method
GB2133625A (en) * 1982-12-15 1984-07-25 Spiralux Ltd Electrical switch
JPH0343725B2 (en) * 1982-12-30 1991-07-03 Nippon Mektron Kk
DE3915989C1 (en) * 1989-05-17 1990-10-31 G. Bopp & Co Ag, Zuerich, Ch
US4977298A (en) * 1989-09-08 1990-12-11 Matsushita Electric Industrial Co., Ltd. Panel switch
US5121091A (en) * 1989-09-08 1992-06-09 Matsushita Electric Industrial Co., Ltd. Panel switch
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
US5239148A (en) * 1991-05-15 1993-08-24 Progressive Engineering Technologies Corp. Lane discriminating traffic counting device
US5210528A (en) * 1992-03-26 1993-05-11 Dp Technologies, Inc. Audible floor mat
WO1994028634A1 (en) * 1993-05-21 1994-12-08 Arthur D. Little Enterprises, Inc. User-configurable control device
DE19510617A1 (en) * 1995-03-23 1996-09-26 Leon Helma Christina Flexible contact mat e.g. for pressure sensitive switching device
US6369804B1 (en) 1998-09-26 2002-04-09 Eleksen Limited Detector constructed from fabric having non-uniform conductivity
US6437258B1 (en) 1998-09-26 2002-08-20 Eleksen Limited Detector constructed from fabric having planes with differing conductance
GB9820906D0 (en) * 1998-09-26 1998-11-18 Electrotextiles Comp Ltd Detector constructed from fabric
GB9820910D0 (en) * 1998-09-26 1998-11-18 Electrotextiles Comp Ltd Detector constructed from fabric
GB2341930B (en) * 1998-09-26 2002-07-31 Electrotextiles Co Ltd Detector constructed from fabric
US6333736B1 (en) 1999-05-20 2001-12-25 Electrotextiles Company Limited Detector constructed from fabric
EP1137385A1 (en) * 1999-10-12 2001-10-04 Invacare Corporation Wheelchair having speed and direction control touchpad
US20090176425A1 (en) * 2008-01-08 2009-07-09 Lung-Wen Chou Flexible keyboard
FR2927574B1 (en) * 2008-02-18 2010-06-04 Faurecia Interieur Ind Device for man-machine interface and motor vehicle comprising such a device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056005A (en) * 1960-08-04 1962-09-25 Harry J Larson Mat switch and method of making the same
US3308253A (en) * 1965-03-25 1967-03-07 Ibm Diaphragm switch having a diaphragm supported on an incompressible layer and an elastomer overlaying the diaphragm

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056005A (en) * 1960-08-04 1962-09-25 Harry J Larson Mat switch and method of making the same
US3308253A (en) * 1965-03-25 1967-03-07 Ibm Diaphragm switch having a diaphragm supported on an incompressible layer and an elastomer overlaying the diaphragm

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Brook et al., Programming Elastic Diaphragm Switching Matrix by Small Balls, IBM Tech. Disclosure Bull., Vol. 10, No. 11, April, 1968, (copy 200 246). *

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708654A (en) * 1971-05-26 1973-01-02 Bennett Pump Inc Reader system for conventional credit cards
US3718791A (en) * 1971-09-16 1973-02-27 Gen Motors Corp Pressure responsive switch
US4044642A (en) * 1973-07-23 1977-08-30 Arp Instruments, Inc. Touch sensitive polyphonic musical instrument
US3911215A (en) * 1974-03-18 1975-10-07 Elographics Inc Discriminating contact sensor
US3996430A (en) * 1974-05-07 1976-12-07 Preh Elektrofeinmechanische Werke Keyboard switch assembly having multilayer printed circuit structure
US3969595A (en) * 1974-09-23 1976-07-13 Xerox Corporation Sequential switching assembly having plural, spaced flexible contact layers
US4065652A (en) * 1974-09-27 1977-12-27 Telefonaktiebolaget L M Ericsson Contact assembly and mounting structure for cross bar selector switch
US4090045A (en) * 1975-12-15 1978-05-16 Marsh Products, Inc. Keyboard strip switch assembly having multifurcated conductive screen contact with contact cleaning wiping-action
US4207444A (en) * 1976-08-09 1980-06-10 Kley, Fitting, Fitting, Nalley And Smith Planar multiple switch
US4137116A (en) * 1977-04-22 1979-01-30 Miller Brothers Method of making a pressure switch
US4194097A (en) * 1978-06-12 1980-03-18 Ncr Corporation Membrane keyboard apparatus with tactile feedback
US4349710A (en) * 1979-03-12 1982-09-14 Miller Norman K Door edge for attachment to a train door and the like
US4304991A (en) * 1979-09-26 1981-12-08 Weber Harold J Indicia sensor apparatus
US4362911A (en) * 1980-09-17 1982-12-07 Ncr Corporation Membrane keyboard switch assembly having selectable tactile properties
US4375585A (en) * 1981-01-08 1983-03-01 Atari, Inc. Deformable switch keyboard
JPS58107522U (en) * 1982-01-18 1983-07-22
JPH0138830Y2 (en) * 1982-01-18 1989-11-20
US4467151A (en) * 1982-12-13 1984-08-21 Control Data Corporation Planar touch panel
DE3345846A1 (en) * 1983-01-31 1984-04-19 Alps Electric Co Ltd input unit
US4529959A (en) * 1983-01-31 1985-07-16 Alps Electric Co., Ltd. Input device
US4603241A (en) * 1983-10-21 1986-07-29 Eliana Nardi Elastic strip with contacts for detecting the transit of motor vehicles with a protection against wear
US4559015A (en) * 1984-07-09 1985-12-17 Arthur Felesky Method and means of testing and refining bicycle riding skills
US4555954A (en) * 1984-12-21 1985-12-03 At&T Technologies, Inc. Method and apparatus for sensing tactile forces
US4700025A (en) * 1986-05-23 1987-10-13 Alps Electric Co., Ltd. Transparent touch-sensitive panel
US5071702A (en) * 1987-09-24 1991-12-10 Mitsui Petrochemical Industries, Ltd. Laminated plate for high frequency
US4990900A (en) * 1987-10-01 1991-02-05 Alps Electric Co., Ltd. Touch panel
US5140107A (en) * 1991-07-02 1992-08-18 Ncr Corporation Digitizer screen and method of making
US5184831A (en) * 1991-10-17 1993-02-09 Lee Garner Karate scoring apparatus
US6307168B1 (en) * 1999-03-23 2001-10-23 Paul Newham Linear spaced dielectric dot separator pressure sensing array incorporating strain release stabilized releasable electric snap stud connectors
US20020134116A1 (en) * 2000-03-30 2002-09-26 Sandbach David Lee Detector constructed from electrically conducting fabric
US6639162B2 (en) * 2000-03-30 2003-10-28 Electrotextiles Company Limited Input device
US7161084B2 (en) * 2000-03-30 2007-01-09 Electrotextiles Company Limited Detector constructed from electrically conducting fabric
US6652123B2 (en) * 2001-05-07 2003-11-25 Jiahn-Chang Wu Light emitting diode display having heat sinking circuit rails
US20040154908A1 (en) * 2001-06-19 2004-08-12 Helmut Friedrich Safety contact mat
US6888081B2 (en) * 2001-06-19 2005-05-03 Aso Gmbh Antriebs-Und Steuerungstechnik Safety contact mat
US20060071751A1 (en) * 2002-04-30 2006-04-06 Koninklijke Philips Electronics N.V. Switch
US7554051B2 (en) 2004-03-18 2009-06-30 Peratech Limited Sensor assembly
WO2005091322A1 (en) * 2004-03-18 2005-09-29 Eleksen Limited Sensor assembly
US20070132736A1 (en) * 2004-03-18 2007-06-14 Eleksen Ltd. Sensor assembly
GB2426825A (en) * 2004-03-18 2006-12-06 Eleksen Ltd Sensor assembly
GB2426825B (en) * 2004-03-18 2008-06-25 Eleksen Ltd Sensor assembly
US20060086026A1 (en) * 2004-10-27 2006-04-27 Stanley Ho Customizable floor mats and vertical displays
US20090068857A1 (en) * 2005-05-06 2009-03-12 Abatek International Ag Electrically conducting contact and method for production thereof
US7964810B2 (en) 2005-05-06 2011-06-21 Abatek International Ag Electrically conducting contact and method for production thereof
US20070120707A1 (en) * 2005-11-29 2007-05-31 Rv Insite, Inc. Method for positioning recreational vehicles and portable position sensor and alert system for recreational vehicles and other vehicles
WO2010034166A1 (en) * 2008-09-27 2010-04-01 Li Xiaoyu Flexible switchboard
US20140015633A1 (en) * 2011-03-25 2014-01-16 Panasonic Corporation Pressure-sensitive switch
WO2016048741A1 (en) * 2014-09-24 2016-03-31 Arimtax Technologies Llc Three-dimensional fabric with embedded input-output devices

Also Published As

Publication number Publication date Type
GB1308575A (en) 1973-02-21 application
DE2120771A1 (en) 1971-11-18 application
FR2090978A5 (en) 1972-01-14 application
USRE28365E (en) 1975-03-18 grant

Similar Documents

Publication Publication Date Title
US4975676A (en) Glass membrane touch-controlled circuit apparatus for voltage selection
US5228562A (en) Membrane switch and fabrication method
US5429006A (en) Semiconductor matrix type sensor for very small surface pressure distribution
US5220136A (en) Contact touchscreen with an improved insulated spacer arrangement
US3757322A (en) Transparent touch controlled interface with interreactively related display
US5270710A (en) Switch device with operating modes of capacitive proximity and mechanical actuation
US3967084A (en) Keyboard switch assemblies having two foot support legs on dome-shaped contact member
US3798370A (en) Electrographic sensor for determining planar coordinates
US4338502A (en) Metallic housing for an electronic apparatus with a flat keyboard
US3995126A (en) Membrane keyboard apparatus
US20050030048A1 (en) Capacitive sensing device for use in a keypad assembly
US5526701A (en) Magnetic surface pressure input panel
US20050110772A1 (en) Resistive type touch panel
US4644326A (en) Unitary key panel
US5386219A (en) Touch overlay for improved touch sensitivity
US3911215A (en) Discriminating contact sensor
US20040022010A1 (en) Electrostatic-capacitance-type coordinate input device
US20130229759A1 (en) Input Device Assembly
US6999009B2 (en) Sensing keys for keyboard
US8390481B2 (en) Sensing capacitance changes of a housing of an electronic device
US5701142A (en) Pointing stick with tripod actuator for cursor control in a computer keyboard
US20100253651A1 (en) Input device with deflectable electrode
US6947031B2 (en) Data processing apparatus with replacement keyboard
US20070242054A1 (en) Light transmission touch panel and manufacturing method thereof
US20130229356A1 (en) Fabric Enclosure Backlighting