GB2145877B - Improvements to capacitive keyboards - Google Patents

Improvements to capacitive keyboards

Info

Publication number
GB2145877B
GB2145877B GB08322956A GB8322956A GB2145877B GB 2145877 B GB2145877 B GB 2145877B GB 08322956 A GB08322956 A GB 08322956A GB 8322956 A GB8322956 A GB 8322956A GB 2145877 B GB2145877 B GB 2145877B
Authority
GB
United Kingdom
Prior art keywords
capacitive keyboards
keyboards
capacitive
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
GB08322956A
Other versions
GB8322956D0 (en
GB2145877A (en
Inventor
Jacques Lewiner
Claude Hennion
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
Priority to GB08322956A priority Critical patent/GB2145877B/en
Publication of GB8322956D0 publication Critical patent/GB8322956D0/en
Publication of GB2145877A publication Critical patent/GB2145877A/en
Application granted granted Critical
Publication of GB2145877B publication Critical patent/GB2145877B/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
GB08322956A 1983-08-26 1983-08-26 Improvements to capacitive keyboards Expired GB2145877B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08322956A GB2145877B (en) 1983-08-26 1983-08-26 Improvements to capacitive keyboards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08322956A GB2145877B (en) 1983-08-26 1983-08-26 Improvements to capacitive keyboards

Publications (3)

Publication Number Publication Date
GB8322956D0 GB8322956D0 (en) 1983-09-28
GB2145877A GB2145877A (en) 1985-04-03
GB2145877B true GB2145877B (en) 1987-10-14

Family

ID=10547898

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08322956A Expired GB2145877B (en) 1983-08-26 1983-08-26 Improvements to capacitive keyboards

Country Status (1)

Country Link
GB (1) GB2145877B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2394775B (en) * 2002-10-31 2006-12-20 Hm Technology Internat Ltd Mechanically operable electrical device

Family Cites Families (5)

* 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
GB1582640A (en) * 1976-10-18 1981-01-14 Alphameric Keyboards Ltd Keyboards for electronic circuits
JPS5851646B2 (en) * 1980-04-16 1983-11-17 アルプス電気株式会社 Variable capacitance push button switch
JPS56153606A (en) * 1980-04-28 1981-11-27 Kureha Chemical Ind Co Ltd High molecular dielectric material
US4492958A (en) * 1981-04-22 1985-01-08 Matsushita Electric Industrial Co., Ltd. Device for controlling and displaying the functions of an electric or electronic apparatus

Also Published As

Publication number Publication date
GB8322956D0 (en) 1983-09-28
GB2145877A (en) 1985-04-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee