CA925794A - Keyboard with roll-over feature - Google Patents

Keyboard with roll-over feature

Info

Publication number
CA925794A
CA925794A CA127317A CA127317A CA925794A CA 925794 A CA925794 A CA 925794A CA 127317 A CA127317 A CA 127317A CA 127317 A CA127317 A CA 127317A CA 925794 A CA925794 A CA 925794A
Authority
CA
Canada
Prior art keywords
keyboard
roll
over feature
feature
over
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
CA127317A
Other versions
CA127317S (en
Inventor
M. Elzinga Johannes
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA925794A publication Critical patent/CA925794A/en
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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
CA127317A 1970-11-14 1971-11-10 Keyboard with roll-over feature Expired CA925794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7016723.A NL166140C (en) 1970-11-14 1970-11-14 KEYBOARD.

Publications (1)

Publication Number Publication Date
CA925794A true CA925794A (en) 1973-05-08

Family

ID=19811565

Family Applications (1)

Application Number Title Priority Date Filing Date
CA127317A Expired CA925794A (en) 1970-11-14 1971-11-10 Keyboard with roll-over feature

Country Status (9)

Country Link
US (1) US3750160A (en)
JP (1) JPS5315336B1 (en)
AT (1) AT324021B (en)
BE (1) BE775310A (en)
CA (1) CA925794A (en)
CH (1) CH538156A (en)
GB (1) GB1370654A (en)
IT (1) IT944874B (en)
NL (1) NL166140C (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932838A (en) * 1971-04-23 1976-01-13 General Electric Company Method and apparatus for controlling circuitry with a plurality of switching means
GB1416456A (en) * 1971-12-07 1975-12-03 Matsushita Electric Ind Co Ltd Signal processing arrangements
JPS4931232A (en) * 1972-07-21 1974-03-20
US3825926A (en) * 1973-02-05 1974-07-23 Ibm Interfacing circuitry for connecting a remote keyboard with a data receiving buffer
US3974478A (en) * 1973-08-09 1976-08-10 Nippon Gakki Seizo Kabushiki Kaisha Key switch scanning and encoding system
US3995252A (en) * 1973-12-26 1976-11-30 General Electric Company Data processing arrangement for printers
US4134320A (en) * 1974-08-19 1979-01-16 Nippon Gakki Seizo Kabushiki Kaisha Key assigner for use in electronic musical instrument
US3982236A (en) * 1974-12-24 1976-09-21 Haig Kafafian Communications and control method and apparatus for persons who may have muscular incoordination and/or spasticity
US4117758A (en) * 1976-11-04 1978-10-03 Kimball International, Inc. Binary word debouncer
JPS5477532A (en) * 1977-12-02 1979-06-21 Matsushita Electric Ind Co Ltd Key identifying circuit
DE3023579C2 (en) * 1980-06-24 1984-10-31 Matth. Hohner Ag, 7218 Trossingen Electronic musical instrument

Family Cites Families (1)

* 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

Also Published As

Publication number Publication date
BE775310A (en) 1972-05-12
DE2154596B2 (en) 1976-08-05
IT944874B (en) 1973-04-20
NL166140B (en) 1981-01-15
AT324021B (en) 1975-08-11
US3750160A (en) 1973-07-31
DE2154596A1 (en) 1972-05-25
NL7016723A (en) 1972-05-16
NL166140C (en) 1981-06-15
CH538156A (en) 1973-06-15
GB1370654A (en) 1974-10-16
JPS5315336B1 (en) 1978-05-24

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