GB1582640A - Keyboards for electronic circuits - Google Patents

Keyboards for electronic circuits Download PDF

Info

Publication number
GB1582640A
GB1582640A GB4317776A GB4317776A GB1582640A GB 1582640 A GB1582640 A GB 1582640A GB 4317776 A GB4317776 A GB 4317776A GB 4317776 A GB4317776 A GB 4317776A GB 1582640 A GB1582640 A GB 1582640A
Authority
GB
United Kingdom
Prior art keywords
conductive region
board
conductive
keyboard
striker
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
Application number
GB4317776A
Other languages
English (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.)
Alphameric Keyboards Ltd
Original Assignee
Alphameric Keyboards 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 Alphameric Keyboards Ltd filed Critical Alphameric Keyboards Ltd
Priority to GB4317776A priority Critical patent/GB1582640A/en
Priority to DE19772746655 priority patent/DE2746655A1/de
Publication of GB1582640A publication Critical patent/GB1582640A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element
    • H03K17/98—Switches controlled by moving an element forming part of the switch using a capacitive movable element having a plurality of control members, e.g. keyboard
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element

Landscapes

  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
GB4317776A 1976-10-18 1976-10-18 Keyboards for electronic circuits Expired GB1582640A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4317776A GB1582640A (en) 1976-10-18 1976-10-18 Keyboards for electronic circuits
DE19772746655 DE2746655A1 (de) 1976-10-18 1977-10-17 Tastatur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4317776A GB1582640A (en) 1976-10-18 1976-10-18 Keyboards for electronic circuits

Publications (1)

Publication Number Publication Date
GB1582640A true GB1582640A (en) 1981-01-14

Family

ID=10427648

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4317776A Expired GB1582640A (en) 1976-10-18 1976-10-18 Keyboards for electronic circuits

Country Status (2)

Country Link
DE (1) DE2746655A1 (enrdf_load_stackoverflow)
GB (1) GB1582640A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064240A3 (en) * 1981-04-29 1983-03-30 Honeywell Inc. Capacitive circuit board and method for fabricating it
EP0069190A3 (en) * 1981-06-29 1983-04-06 W.H. Brady Co. Capacitance switch
FR2522918A1 (fr) * 1982-03-03 1983-09-09 Lewiner Jacques Perfectionnements aux claviers capacitifs
GB2145877A (en) * 1983-08-26 1985-04-03 Jacques Lewiner Improvements to capacitive keyboards
US4614937A (en) * 1982-01-29 1986-09-30 Commissariat A L'energie Atomique Capacitive keyboard structure
GB2394775A (en) * 2002-10-31 2004-05-05 Hm Technology Internat Ltd Mechanically operated electrical device and code reading apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503494A1 (fr) * 1981-04-03 1982-10-08 Commissariat Energie Atomique Structure antiparasite pour clavier capacitif
EP0062572B1 (fr) * 1981-04-03 1986-10-15 Commissariat à l'Energie Atomique Clavier capacitif à structure antiparasite
DE10005620A1 (de) * 2000-02-09 2001-08-30 Infineon Technologies Ag Schaltungsanordnung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1443174A (en) * 1973-04-06 1976-07-21 Alphameric Keyboards Ltd Keyboards for electronic circuits
US3921167A (en) * 1974-06-14 1975-11-18 Ibm Capacitive circuitboard

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064240A3 (en) * 1981-04-29 1983-03-30 Honeywell Inc. Capacitive circuit board and method for fabricating it
EP0069190A3 (en) * 1981-06-29 1983-04-06 W.H. Brady Co. Capacitance switch
US4614937A (en) * 1982-01-29 1986-09-30 Commissariat A L'energie Atomique Capacitive keyboard structure
FR2522918A1 (fr) * 1982-03-03 1983-09-09 Lewiner Jacques Perfectionnements aux claviers capacitifs
GB2145877A (en) * 1983-08-26 1985-04-03 Jacques Lewiner Improvements to capacitive keyboards
GB2394775A (en) * 2002-10-31 2004-05-05 Hm Technology Internat Ltd Mechanically operated electrical device and code reading apparatus
GB2394775B (en) * 2002-10-31 2006-12-20 Hm Technology Internat Ltd Mechanically operable electrical device

Also Published As

Publication number Publication date
DE2746655A1 (de) 1978-04-27
DE2746655C2 (enrdf_load_stackoverflow) 1989-05-18

Similar Documents

Publication Publication Date Title
US4920343A (en) Capacitive keyswitch membrane with self contained sense-to-ground capacitance
US4233522A (en) Capacitive touch switch array
US3951250A (en) Capacitive key for electronic circuit
USRE40867E1 (en) Multiple input proximity detector and touchpad system
DE69700422T2 (de) Berührungssensor ohne Kissen
US3974332A (en) Tablet for use in a coordinate digitizer
US4376238A (en) Electrical devices
US4733222A (en) Capacitance-variation-sensitive touch sensing array system
US5872561A (en) Fast scanning switch matrix
US4954823A (en) Touch keyboard systems
US5945980A (en) Touchpad with active plane for pen detection
DE69105457T2 (de) Berührungsempfindlicher Überzug.
EP0063800A2 (en) Keyboard apparatus
EP0184535A3 (en) Electrographic coordinate input apparatus
EP0187021A2 (en) Method and apparatus for capacitive keyboard scanning
GB1582640A (en) Keyboards for electronic circuits
US6323445B1 (en) Membrane switch structure providing electrostatic discharge protection
US4274752A (en) Keyboard multiple switch assembly
JPH06283993A (ja) スイッチ装置
DE102014210286A1 (de) Kapazitive Mehrzustandstaste
US4163222A (en) Synchronous phase detected keyboard
US4494109A (en) Noncontacting keyboard employing a transformer element
EP0009420B1 (en) A noncontacting switch device employing a differential transformer element
WO2020149658A2 (ko) 터치센서패널 및 터치입력장치
GB2027209A (en) Capacitive touchpad sensors

Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
SP Amendment (slips) printed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921018