GB1520949A - Capacitive keys - Google Patents

Capacitive keys

Info

Publication number
GB1520949A
GB1520949A GB4662676A GB4662676A GB1520949A GB 1520949 A GB1520949 A GB 1520949A GB 4662676 A GB4662676 A GB 4662676A GB 4662676 A GB4662676 A GB 4662676A GB 1520949 A GB1520949 A GB 1520949A
Authority
GB
United Kingdom
Prior art keywords
nov
capacitive
capacitive keys
capacitor
substrative
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
GB4662676A
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.)
Telecom Italia SpA
Olivetti SpA
Original Assignee
Olivetti SpA
Ing C Olivetti and C SpA
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 Olivetti SpA, Ing C Olivetti and C SpA filed Critical Olivetti SpA
Publication of GB1520949A publication Critical patent/GB1520949A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/16—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture using variation of distance between electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Organic Insulating Materials (AREA)

Abstract

1520949 Capacitive switches ING C OLIVETTI & C SpA 9 Nov 1976 [19 Nov 1975] 46626/76 Heading H1M In a key-actuated capacitive switch, the capacitor dielectric material comprises a phenolic, polyamide, epoxy, vinyl, nitrile or acrylic resin containing an antistatic agent to minimize errors due to turboelectric effects. The dielectric may be photosensitive and may be the cured portion remaining in a substrative process for forming the capacitor electrodes.
GB4662676A 1975-11-19 1976-11-09 Capacitive keys Expired GB1520949A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6985075A IT1055690B (en) 1975-11-19 1975-11-19 DIELECTRIC FOR CAPACITIVE BUTTONS

Publications (1)

Publication Number Publication Date
GB1520949A true GB1520949A (en) 1978-08-09

Family

ID=11312962

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4662676A Expired GB1520949A (en) 1975-11-19 1976-11-09 Capacitive keys

Country Status (3)

Country Link
JP (1) JPS5262699A (en)
GB (1) GB1520949A (en)
IT (1) IT1055690B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011075312A1 (en) * 2011-05-05 2012-11-08 Rohde & Schwarz Gmbh & Co. Kg Quasi-broadband Doherty amplifier and related capacitor circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011075312A1 (en) * 2011-05-05 2012-11-08 Rohde & Schwarz Gmbh & Co. Kg Quasi-broadband Doherty amplifier and related capacitor circuit
US9236190B2 (en) 2011-05-05 2016-01-12 Rohde & Schwarz Gmbh & Co. Kg Capacitor circuit for a quasi-broadband doherty amplifier
US9336954B2 (en) 2011-05-05 2016-05-10 Rohde & Schwarz Gmbh & Co. Kg Quasi-broadband doherty amplifier with associated capacitor circuit

Also Published As

Publication number Publication date
IT1055690B (en) 1982-01-11
JPS5262699A (en) 1977-05-24

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Legal Events

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

Effective date: 19931109