DE2746655A1 - Tastatur - Google Patents

Tastatur

Info

Publication number
DE2746655A1
DE2746655A1 DE19772746655 DE2746655A DE2746655A1 DE 2746655 A1 DE2746655 A1 DE 2746655A1 DE 19772746655 DE19772746655 DE 19772746655 DE 2746655 A DE2746655 A DE 2746655A DE 2746655 A1 DE2746655 A1 DE 2746655A1
Authority
DE
Germany
Prior art keywords
conductive
conductive area
plate
area
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19772746655
Other languages
German (de)
English (en)
Other versions
DE2746655C2 (enrdf_load_stackoverflow
Inventor
Douglas Craig-Wood
Ian Robert Prince
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
Publication of DE2746655A1 publication Critical patent/DE2746655A1/de
Application granted granted Critical
Publication of DE2746655C2 publication Critical patent/DE2746655C2/de
Granted 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)
DE19772746655 1976-10-18 1977-10-17 Tastatur Granted DE2746655A1 (de)

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 (2)

Publication Number Publication Date
DE2746655A1 true DE2746655A1 (de) 1978-04-27
DE2746655C2 DE2746655C2 (enrdf_load_stackoverflow) 1989-05-18

Family

ID=10427648

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772746655 Granted DE2746655A1 (de) 1976-10-18 1977-10-17 Tastatur

Country Status (2)

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

Cited By (5)

* 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
EP0062572A3 (en) * 1981-04-03 1983-06-22 Commissariat A L'energie Atomique Etablissement De Caractere Scientifique Technique Et Industriel Capacitive keyboard with anti-parasite structure
FR2520954A1 (fr) * 1982-01-29 1983-08-05 Commissariat Energie Atomique Structure de clavier capacitif
EP0088030A1 (fr) * 1982-03-03 1983-09-07 Jacques Lewiner Perfectionnements aux claviers capacitifs
US6414531B2 (en) 2000-02-09 2002-07-02 Infineon Technologies Ag Circuit configuration for adjusting signal delay times

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400758A (en) * 1981-06-29 1983-08-23 W. H. Brady Co. Capacitance switch arrangement
US4359720A (en) * 1981-04-29 1982-11-16 Honeywell Inc. Environmentally sealed variable capacitance apparatus
GB2145877B (en) * 1983-08-26 1987-10-14 Jacques Lewiner Improvements to capacitive keyboards
GB2394775B (en) * 2002-10-31 2006-12-20 Hm Technology Internat Ltd Mechanically operable electrical device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2524437A1 (de) * 1974-06-14 1976-01-02 Ibm Schalttafelstruktur einer kapazitiv gekoppelten tastatur
GB1443174A (en) * 1973-04-06 1976-07-21 Alphameric Keyboards Ltd Keyboards for electronic circuits

Patent Citations (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
DE2524437A1 (de) * 1974-06-14 1976-01-02 Ibm Schalttafelstruktur einer kapazitiv gekoppelten tastatur

Cited By (8)

* 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
EP0062572A3 (en) * 1981-04-03 1983-06-22 Commissariat A L'energie Atomique Etablissement De Caractere Scientifique Technique Et Industriel Capacitive keyboard with anti-parasite structure
FR2520954A1 (fr) * 1982-01-29 1983-08-05 Commissariat Energie Atomique Structure de clavier capacitif
EP0086135A1 (fr) * 1982-01-29 1983-08-17 Commissariat à l'Energie Atomique Structure de clavier capacitif
US4614937A (en) * 1982-01-29 1986-09-30 Commissariat A L'energie Atomique Capacitive keyboard structure
EP0088030A1 (fr) * 1982-03-03 1983-09-07 Jacques Lewiner Perfectionnements aux claviers capacitifs
FR2522918A1 (fr) * 1982-03-03 1983-09-09 Lewiner Jacques Perfectionnements aux claviers capacitifs
US6414531B2 (en) 2000-02-09 2002-07-02 Infineon Technologies Ag Circuit configuration for adjusting signal delay times

Also Published As

Publication number Publication date
GB1582640A (en) 1981-01-14
DE2746655C2 (enrdf_load_stackoverflow) 1989-05-18

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: H03K 17/975

8125 Change of the main classification

Ipc: H03K 17/98

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee