GB1410811A - Keyboard apparatus - Google Patents

Keyboard apparatus

Info

Publication number
GB1410811A
GB1410811A GB5250572A GB5250572A GB1410811A GB 1410811 A GB1410811 A GB 1410811A GB 5250572 A GB5250572 A GB 5250572A GB 5250572 A GB5250572 A GB 5250572A GB 1410811 A GB1410811 A GB 1410811A
Authority
GB
United Kingdom
Prior art keywords
output
key
stable
keys
array
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
GB5250572A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1410811A publication Critical patent/GB1410811A/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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)
GB5250572A 1971-11-17 1972-11-14 Keyboard apparatus Expired GB1410811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7115804,A NL170895C (nl) 1971-11-17 1971-11-17 Toetsenbord met cyclische afvraaginrichting.

Publications (1)

Publication Number Publication Date
GB1410811A true GB1410811A (en) 1975-10-22

Family

ID=19814496

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5250572A Expired GB1410811A (en) 1971-11-17 1972-11-14 Keyboard apparatus

Country Status (10)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500169A (en) * 1982-07-13 1985-02-19 Donnelly John H Cosmetic and observer line of sight mirror

Families Citing this family (5)

* 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 (enrdf_load_stackoverflow) * 1978-08-31 1980-03-07
FR2447089A1 (fr) * 1979-01-17 1980-08-14 Serras Paulet Edouard Clavier de commande a touches et interrupteurs mecaniques
FR2449388A1 (fr) * 1979-02-13 1980-09-12 Cii Honeywell Bull Clavier electronique
EP0095023A3 (en) * 1982-05-20 1985-04-10 International Business Machines Corporation Contact keyboard with finger controlled n-key rollover

Family Cites Families (1)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500169A (en) * 1982-07-13 1985-02-19 Donnelly John H Cosmetic and observer line of sight mirror

Also Published As

Publication number Publication date
US3778818A (en) 1973-12-11
NL170895B (nl) 1982-08-02
BE791475A (fr) 1973-05-16
IT973544B (it) 1974-06-10
SE385986B (sv) 1976-07-26
NL7115804A (enrdf_load_stackoverflow) 1973-05-21
DE2255372C3 (de) 1978-06-08
JPS538455B2 (enrdf_load_stackoverflow) 1978-03-29
DE2255372B2 (de) 1977-10-13
CA973805A (en) 1975-09-02
JPS4858922A (enrdf_load_stackoverflow) 1973-08-18
NL170895C (nl) 1983-01-03
DE2255372A1 (de) 1973-05-24
FR2161660A5 (enrdf_load_stackoverflow) 1973-07-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years