GB1380709A - Signalling device - Google Patents

Signalling device

Info

Publication number
GB1380709A
GB1380709A GB5990471A GB5990471A GB1380709A GB 1380709 A GB1380709 A GB 1380709A GB 5990471 A GB5990471 A GB 5990471A GB 5990471 A GB5990471 A GB 5990471A GB 1380709 A GB1380709 A GB 1380709A
Authority
GB
United Kingdom
Prior art keywords
electret
electrode
conductive layer
sheet
pulses
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
GB5990471A
Other languages
English (en)
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 GB1380709A publication Critical patent/GB1380709A/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)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Push-Button Switches (AREA)
  • Electronic Switches (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Organic Insulating Materials (AREA)
GB5990471A 1970-12-28 1971-12-23 Signalling device Expired GB1380709A (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
GB1380709A true GB1380709A (en) 1975-01-15

Family

ID=22285159

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5990471A Expired GB1380709A (en) 1970-12-28 1971-12-23 Signalling device

Country Status (11)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133139A (en) * 1982-12-29 1984-07-18 Western Electric Co Touch sensitive device

Families Citing this family (11)

* 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
US4456800A (en) * 1983-05-25 1984-06-26 Allen-Bradley Company Planar contact array switch having improved ground path for dissipating electrostatic discharges
DE8900946U1 (de) * 1988-09-30 1990-02-08 Siemens AG, 1000 Berlin und 8000 München Kapazitive Schaltungskarte
US5835027A (en) * 1996-11-07 1998-11-10 Tyburski; Robert M. Residual charge effect traffic sensor
JP4588321B2 (ja) * 2001-10-09 2010-12-01 ポンペイ，フランク，ジョセフ パラメトリックアレイのための超音波トランスデューサ
DE102004005954A1 (de) * 2004-02-02 2005-08-18 E.G.O. Elektro-Gerätebau GmbH Bedieneinrichtung für ein Elektrogerät mit einem Bedien-Feld und einem Sensorelement darunter sowie Verfahren zum Betrieb der Bedieneinrichtung
FI117455B (fi) * 2004-07-07 2006-10-13 Emfit Oy Elektromekaanisen kontrolliyksikön sähköinen kytkentä
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133139A (en) * 1982-12-29 1984-07-18 Western Electric Co Touch sensitive device

Also Published As

Publication number Publication date
JPS4713585A (https=) 1972-07-13
BE777202A (fr) 1972-04-17
DE2164202C3 (de) 1974-05-09
IT943354B (it) 1973-04-02
NL7117891A (https=) 1972-06-30
JPS5436311B1 (https=) 1979-11-08
ES398773A1 (es) 1974-08-16
SE377974B (https=) 1975-08-04
CA1009764A (en) 1977-05-03
US3668417A (en) 1972-06-06
DE2164202A1 (de) 1972-07-13
DE2164202B2 (de) 1973-10-18
FR2120902A5 (https=) 1972-08-18
NL159837B (nl) 1979-03-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee