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CA973805A - Keyboard with roll-over feature - Google Patents

Keyboard with roll-over feature

Info

Publication number
CA973805A
CA973805A CA156,456A CA156456A CA973805A CA 973805 A CA973805 A CA 973805A CA 156456 A CA156456 A CA 156456A CA 973805 A CA973805 A CA 973805A
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
CA156,456A
Other versions
CA156456S (en
Inventor
Johannes H.M. Scholten
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 CA973805A publication Critical patent/CA973805A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/16—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of transmitters, e.g. code-bars, code-discs
    • 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
    • H03M11/003—Phantom keys detection and prevention

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)
CA156,456A 1971-11-17 1972-11-15 Keyboard with roll-over feature Expired CA973805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7115804,A NL170895C (en) 1971-11-17 1971-11-17 KEYBOARD WITH CYCLIC QUESTIONER.

Publications (1)

Publication Number Publication Date
CA973805A true CA973805A (en) 1975-09-02

Family

ID=19814496

Family Applications (1)

Application Number Title Priority Date Filing Date
CA156,456A Expired CA973805A (en) 1971-11-17 1972-11-15 Keyboard with roll-over feature

Country Status (10)

Country Link
US (1) US3778818A (en)
JP (1) JPS538455B2 (en)
BE (1) BE791475A (en)
CA (1) CA973805A (en)
DE (1) DE2255372C3 (en)
FR (1) FR2161660A5 (en)
GB (1) GB1410811A (en)
IT (1) IT973544B (en)
NL (1) NL170895C (en)
SE (1) SE385986B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096935A (en) * 1974-02-22 1978-06-27 Canon Kabushiki Kaisha Input device
JPS5535679U (en) * 1978-08-31 1980-03-07
FR2447089A1 (en) * 1979-01-17 1980-08-14 Serras Paulet Edouard KEY CONTROL KEYBOARD AND MECHANICAL SWITCHES
FR2449388A1 (en) * 1979-02-13 1980-09-12 Cii Honeywell Bull Entry system for coded data into data processing system - employs electronic keyboard containing memory and coding cells, which are clocked by pulse generator
EP0095023A3 (en) * 1982-05-20 1985-04-10 International Business Machines Corporation Contact keyboard with finger controlled n-key rollover
US4500169A (en) * 1982-07-13 1985-02-19 Donnelly John H Cosmetic and observer line of sight mirror

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5035372B1 (en) * 1970-03-26 1975-11-15

Also Published As

Publication number Publication date
NL170895B (en) 1982-08-02
DE2255372B2 (en) 1977-10-13
BE791475A (en) 1973-05-16
JPS538455B2 (en) 1978-03-29
FR2161660A5 (en) 1973-07-06
GB1410811A (en) 1975-10-22
NL7115804A (en) 1973-05-21
IT973544B (en) 1974-06-10
SE385986B (en) 1976-07-26
DE2255372C3 (en) 1978-06-08
JPS4858922A (en) 1973-08-18
NL170895C (en) 1983-01-03
DE2255372A1 (en) 1973-05-24
US3778818A (en) 1973-12-11

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