ES398773A1 - Touch-sensitive switch employing electret foil - Google Patents

Touch-sensitive switch employing electret foil

Info

Publication number
ES398773A1
ES398773A1 ES398773A ES398773A ES398773A1 ES 398773 A1 ES398773 A1 ES 398773A1 ES 398773 A ES398773 A ES 398773A ES 398773 A ES398773 A ES 398773A ES 398773 A1 ES398773 A1 ES 398773A1
Authority
ES
Spain
Prior art keywords
cover
touch
foil
sensitive switch
holes
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
ES398773A
Other languages
Spanish (es)
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES398773A1 publication Critical patent/ES398773A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/025—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric
    • 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

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Signal Processing (AREA)
  • Push-Button Switches (AREA)
  • Electronic Switches (AREA)

Abstract

A keyboard switching arrangement that is mechanically simple, reliable, and which can be fabricated with an overall thickness of less than 1/4 inch, includes a plurality of independent conductive elements aligned with holes in a protective front cover. A single sheet of a metallized foil electret is interposed between the cover and the conductive members. The metal layer of the foil forms a capacitive transducer with each backplate section. Each switch is operated by touching the foil electret through one of the cover holes. The resulting displacement generates an electric output signal which is utilized for actuating an associated switching element or the like.
ES398773A 1970-12-28 1971-12-24 Touch-sensitive switch employing electret foil Expired ES398773A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10153670A 1970-12-28 1970-12-28

Publications (1)

Publication Number Publication Date
ES398773A1 true ES398773A1 (en) 1974-08-16

Family

ID=22285159

Family Applications (1)

Application Number Title Priority Date Filing Date
ES398773A Expired ES398773A1 (en) 1970-12-28 1971-12-24 Touch-sensitive switch employing electret foil

Country Status (11)

Country Link
US (1) US3668417A (en)
JP (1) JPS5436311B1 (en)
BE (1) BE777202A (en)
CA (1) CA1009764A (en)
DE (1) DE2164202C3 (en)
ES (1) ES398773A1 (en)
FR (1) FR2120902A5 (en)
GB (1) GB1380709A (en)
IT (1) IT943354B (en)
NL (1) NL159837B (en)
SE (1) SE377974B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751612A (en) * 1971-08-30 1973-08-07 Colorado Instr Inc Snap action capacitive type switch
US3786495A (en) * 1972-05-17 1974-01-15 Ncr Stored charge transducer
US4336529A (en) * 1980-02-19 1982-06-22 Pitney Bowes Inc. Postage meter having shielded keyboard to protect against electromagnetic radiation
US4561002A (en) * 1982-08-30 1985-12-24 General Electric Company Capacitive touch switch arrangement
US4593191A (en) * 1982-12-29 1986-06-03 At&T Bell Laboratories Pressure and optical sensitive device with deformable protrusions
US4456800A (en) * 1983-05-25 1984-06-26 Allen-Bradley Company Planar contact array switch having improved ground path for dissipating electrostatic discharges
DE8900946U1 (en) * 1988-09-30 1990-02-08 Siemens AG, 1000 Berlin und 8000 München Capacitive circuit card
US5835027A (en) * 1996-11-07 1998-11-10 Tyburski; Robert M. Residual charge effect traffic sensor
EP1444861B1 (en) * 2001-10-09 2020-03-18 Frank Joseph Pompei Ultrasonic transducer for parametric array
DE102004005954A1 (en) * 2004-02-02 2005-08-18 E.G.O. Elektro-Gerätebau GmbH Operating device for an electrical appliance with a control panel and a sensor element underneath and method for operating the operating device
FI117455B (en) * 2004-07-07 2006-10-13 Emfit Oy Electrical connection of electromechanical control unit
GB201312879D0 (en) * 2013-07-18 2013-09-04 Nokia Corp Apparatuses, methods and computer programs for expanding the use of touch-sensitive input apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA822821A (en) * 1969-09-09 W. Reedyk Cornelis Directional electret transducer
US2610245A (en) * 1946-02-18 1952-09-09 Robert H Rines Electret array sensitive to radio waves
US3118022A (en) * 1961-08-07 1964-01-14 Bell Telephone Labor Inc Electroacoustic transducer
US3290439A (en) * 1963-04-29 1966-12-06 Willcox Data encoding keyboard
US3308253A (en) * 1965-03-25 1967-03-07 Ibm Diaphragm switch having a diaphragm supported on an incompressible layer and an elastomer overlaying the diaphragm
US3503031A (en) * 1969-02-11 1970-03-24 Control Data Corp Printed circuit keyboard

Also Published As

Publication number Publication date
DE2164202C3 (en) 1974-05-09
DE2164202A1 (en) 1972-07-13
CA1009764A (en) 1977-05-03
JPS4713585A (en) 1972-07-13
NL7117891A (en) 1972-06-30
SE377974B (en) 1975-08-04
BE777202A (en) 1972-04-17
GB1380709A (en) 1975-01-15
FR2120902A5 (en) 1972-08-18
DE2164202B2 (en) 1973-10-18
JPS5436311B1 (en) 1979-11-08
US3668417A (en) 1972-06-06
NL159837B (en) 1979-03-15
IT943354B (en) 1973-04-02

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