FR2161969B1 - - Google Patents

Info

Publication number
FR2161969B1
FR2161969B1 FR7240418A FR7240418A FR2161969B1 FR 2161969 B1 FR2161969 B1 FR 2161969B1 FR 7240418 A FR7240418 A FR 7240418A FR 7240418 A FR7240418 A FR 7240418A FR 2161969 B1 FR2161969 B1 FR 2161969B1
Authority
FR
France
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
FR7240418A
Other languages
French (fr)
Other versions
FR2161969A1 (enrdf_load_stackoverflow
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2161969A1 publication Critical patent/FR2161969A1/fr
Application granted granted Critical
Publication of FR2161969B1 publication Critical patent/FR2161969B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
    • G11C17/04—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using capacitive elements
    • 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

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)
  • Amplifiers (AREA)
FR7240418A 1971-11-30 1972-11-08 Expired FR2161969B1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20339071A 1971-11-30 1971-11-30

Publications (2)

Publication Number Publication Date
FR2161969A1 FR2161969A1 (enrdf_load_stackoverflow) 1973-07-13
FR2161969B1 true FR2161969B1 (enrdf_load_stackoverflow) 1975-03-28

Family

ID=22753791

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7240418A Expired FR2161969B1 (enrdf_load_stackoverflow) 1971-11-30 1972-11-08

Country Status (4)

Country Link
JP (1) JPS5437457B2 (enrdf_load_stackoverflow)
DE (1) DE2247972A1 (enrdf_load_stackoverflow)
FR (1) FR2161969B1 (enrdf_load_stackoverflow)
GB (1) GB1363778A (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5611144Y2 (enrdf_load_stackoverflow) * 1975-04-08 1981-03-13
JPH07109572B2 (ja) * 1984-02-29 1995-11-22 東京プレス工業株式会社 キャパシティブキ−ボ−ド
GB2168816A (en) * 1984-12-19 1986-06-25 Philips Electronic Associated Touch-sensitive position sensor apparatus
US4651133A (en) * 1984-12-24 1987-03-17 At&T Technologies, Inc. Method and apparatus for capacitive keyboard scanning
US5499208A (en) * 1994-09-12 1996-03-12 At&T Corp. Integrated circuit memory device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3293640A (en) * 1964-05-22 1966-12-20 Chalfin Albert Electronic systems keyboard and switch matrix
US3437795A (en) * 1965-06-28 1969-04-08 Ampex Data input devices and systems
DE1549570A1 (de) * 1967-04-03 1971-03-04 Elektronische Rechenmasch Ind Schaltung fuer eine kontaktlose Tastatur,vorzugsweise fuer elektronische Rechenmaschinen

Also Published As

Publication number Publication date
FR2161969A1 (enrdf_load_stackoverflow) 1973-07-13
DE2247972A1 (de) 1973-06-07
JPS5437457B2 (enrdf_load_stackoverflow) 1979-11-15
JPS4864838A (enrdf_load_stackoverflow) 1973-09-07
GB1363778A (en) 1974-08-14

Similar Documents

Publication Publication Date Title
ATA136472A (enrdf_load_stackoverflow)
AR196074A1 (enrdf_load_stackoverflow)
FR2161969B1 (enrdf_load_stackoverflow)
AU2894671A (enrdf_load_stackoverflow)
AU2564071A (enrdf_load_stackoverflow)
AU2485671A (enrdf_load_stackoverflow)
AU2941471A (enrdf_load_stackoverflow)
AU3005371A (enrdf_load_stackoverflow)
AU2726271A (enrdf_load_stackoverflow)
AU2885171A (enrdf_load_stackoverflow)
AU2455871A (enrdf_load_stackoverflow)
AU2577671A (enrdf_load_stackoverflow)
AU2399971A (enrdf_load_stackoverflow)
AU2907471A (enrdf_load_stackoverflow)
AU2880771A (enrdf_load_stackoverflow)
AU2503871A (enrdf_load_stackoverflow)
AU2486471A (enrdf_load_stackoverflow)
AU2940971A (enrdf_load_stackoverflow)
AU2875571A (enrdf_load_stackoverflow)
AU2473671A (enrdf_load_stackoverflow)
AU2456871A (enrdf_load_stackoverflow)
AU2854371A (enrdf_load_stackoverflow)
AU2837671A (enrdf_load_stackoverflow)
AU3038671A (enrdf_load_stackoverflow)
AU2836771A (enrdf_load_stackoverflow)

Legal Events

Date Code Title Description
ST Notification of lapse