FR2253241B1 - - Google Patents

Info

Publication number
FR2253241B1
FR2253241B1 FR7404777A FR7404777A FR2253241B1 FR 2253241 B1 FR2253241 B1 FR 2253241B1 FR 7404777 A FR7404777 A FR 7404777A FR 7404777 A FR7404777 A FR 7404777A FR 2253241 B1 FR2253241 B1 FR 2253241B1
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
FR7404777A
Other versions
FR2253241A1 (fr
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 FR2253241A1 publication Critical patent/FR2253241A1/fr
Application granted granted Critical
Publication of FR2253241B1 publication Critical patent/FR2253241B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/20—Dynamic coding, i.e. by key scanning
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0227—Cooperation and interconnection of the input arrangement with other functional units of a computer

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Digital Computer Display Output (AREA)
FR7404777A 1973-02-05 1974-01-21 Expired FR2253241B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00329955A US3825926A (en) 1973-02-05 1973-02-05 Interfacing circuitry for connecting a remote keyboard with a data receiving buffer

Publications (2)

Publication Number Publication Date
FR2253241A1 FR2253241A1 (fr) 1975-06-27
FR2253241B1 true FR2253241B1 (fr) 1978-06-16

Family

ID=23287726

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7404777A Expired FR2253241B1 (fr) 1973-02-05 1974-01-21

Country Status (5)

Country Link
US (1) US3825926A (fr)
JP (1) JPS5621170B2 (fr)
DE (1) DE2401021A1 (fr)
FR (1) FR2253241B1 (fr)
GB (1) GB1429411A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920926A (en) * 1973-12-07 1975-11-18 Northern Electric Co Telephone data set including visual display means
US3973256A (en) * 1975-07-14 1976-08-03 Compucorp Key detection system interconnecting keyboard and data processing system
US4064560A (en) * 1975-07-25 1977-12-20 Bunker Ramo Corporation Master keyboard terminal with auxiliary keyboard terminal capability
US4106011A (en) * 1975-10-24 1978-08-08 Tektronix, Inc. Keyboard circuit
GB1575002A (en) * 1976-03-11 1980-09-17 Post Office Data transmission system
JPS5367728U (fr) * 1976-11-09 1978-06-07
US4194188A (en) * 1977-09-26 1980-03-18 Redactron Corporation Interrogation of key switches using pulse width detection
JPS54121026A (en) * 1978-03-13 1979-09-19 Fujitsu Ltd Input control system
GB2083669B (en) * 1980-09-05 1985-01-03 Casio Computer Co Ltd Key data entry system
GB2094529B (en) * 1981-03-06 1984-07-18 Solartron Electronic Group The Keyboard modules for use in data terminals

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675239A (en) * 1970-09-14 1972-07-04 Ncr Co Unlimited roll keyboard circuit
NL166140C (nl) * 1970-11-14 1981-06-15 Philips Nv Toetsenbord.
US3760409A (en) * 1971-11-17 1973-09-18 Alan M Voorhees Programmable keyboard and keys

Also Published As

Publication number Publication date
GB1429411A (en) 1976-03-24
JPS5621170B2 (fr) 1981-05-18
FR2253241A1 (fr) 1975-06-27
DE2401021A1 (de) 1974-08-08
US3825926A (en) 1974-07-23
JPS49107627A (fr) 1974-10-12

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Legal Events

Date Code Title Description
ST Notification of lapse