GB1304497A - - Google Patents

Info

Publication number
GB1304497A
GB1304497A GB5325471A GB5325471A GB1304497A GB 1304497 A GB1304497 A GB 1304497A GB 5325471 A GB5325471 A GB 5325471A GB 5325471 A GB5325471 A GB 5325471A GB 1304497 A GB1304497 A GB 1304497A
Authority
GB
United Kingdom
Prior art keywords
key
mosfet
conductor
sheet
keyboards
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
GB5325471A
Other languages
English (en)
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 filed Critical
Publication of GB1304497A publication Critical patent/GB1304497A/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
    • 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

Landscapes

  • Push-Button Switches (AREA)
GB5325471A 1970-12-17 1971-11-17 Expired GB1304497A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA100,973A CA995369A (en) 1970-12-17 1970-12-17 Capacitive transducer

Publications (1)

Publication Number Publication Date
GB1304497A true GB1304497A (ja) 1973-01-24

Family

ID=4088273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5325471A Expired GB1304497A (ja) 1970-12-17 1971-11-17

Country Status (2)

Country Link
CA (1) CA995369A (ja)
GB (1) GB1304497A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261574A (en) * 1991-11-12 1993-05-19 Nokia Mobile Phones Ltd Telephone membrane keyboard with audible feedback

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101832750A (zh) * 2010-05-20 2010-09-15 中国海洋大学 变电介质电容式琴键压下量振荡测量传感装置与方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261574A (en) * 1991-11-12 1993-05-19 Nokia Mobile Phones Ltd Telephone membrane keyboard with audible feedback
GB2261574B (en) * 1991-11-12 1995-09-13 Nokia Mobile Phones Ltd Telephone keyboard with audible feedback

Also Published As

Publication number Publication date
CA995369A (en) 1976-08-17

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees