CA923433A - Full-roll keyboard circuits - Google Patents

Full-roll keyboard circuits

Info

Publication number
CA923433A
CA923433A CA122709A CA122709A CA923433A CA 923433 A CA923433 A CA 923433A CA 122709 A CA122709 A CA 122709A CA 122709 A CA122709 A CA 122709A CA 923433 A CA923433 A CA 923433A
Authority
CA
Canada
Prior art keywords
full
keyboard circuits
roll
roll keyboard
circuits
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
CA122709A
Other languages
English (en)
Other versions
CA122709S (en
Inventor
T. Ackerman Howard
W. Kessler Clarence
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.)
National Cash Register Co
Original Assignee
National Cash Register Co
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 National Cash Register Co filed Critical National Cash Register Co
Application granted granted Critical
Publication of CA923433A publication Critical patent/CA923433A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
CA122709A 1970-09-14 1971-09-13 Full-roll keyboard circuits Expired CA923433A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7197270A 1970-09-14 1970-09-14

Publications (1)

Publication Number Publication Date
CA923433A true CA923433A (en) 1973-03-27

Family

ID=22104765

Family Applications (1)

Application Number Title Priority Date Filing Date
CA122709A Expired CA923433A (en) 1970-09-14 1971-09-13 Full-roll keyboard circuits

Country Status (15)

Country Link
US (1) US3675239A (de)
AT (1) AT313608B (de)
AU (1) AU443750B2 (de)
BE (1) BE772502A (de)
BR (1) BR7105984D0 (de)
CA (1) CA923433A (de)
CH (1) CH535458A (de)
DE (1) DE2145119B2 (de)
ES (1) ES394738A1 (de)
FR (1) FR2112956A5 (de)
GB (1) GB1316215A (de)
NL (1) NL178455C (de)
NO (1) NO131956C (de)
SE (1) SE361222B (de)
ZA (1) ZA715289B (de)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121284A (en) * 1972-09-11 1978-10-17 Hyatt Gilbert P Computerized system for operator interaction
NL166140C (nl) * 1970-11-14 1981-06-15 Philips Nv Toetsenbord.
USRE31942E (en) * 1971-03-01 1985-07-09 High speed serial scan and readout of keyboards
CA937875A (en) * 1971-05-19 1973-12-04 M. Bernin Victor N-key rollover keyboard
US4517553A (en) * 1971-05-19 1985-05-14 Illinois Tool Works Inc. N-Key rollover keyboard
US3792466A (en) * 1972-05-31 1974-02-12 Mos Technology Inc Keyboard entry system with n-key rollover and n-key lockout protection
US3786497A (en) * 1972-07-31 1974-01-15 Ibm Matrix keyboard method and apparatus
US3921166A (en) * 1972-09-15 1975-11-18 Raytheon Co Capacitance matrix keyboard
US3825926A (en) * 1973-02-05 1974-07-23 Ibm Interfacing circuitry for connecting a remote keyboard with a data receiving buffer
US3886543A (en) * 1973-11-29 1975-05-27 Teletype Corp Debounce logic for keyboard
JPS5086929A (de) * 1973-11-30 1975-07-12
US3995252A (en) * 1973-12-26 1976-11-30 General Electric Company Data processing arrangement for printers
JPS5187917A (de) * 1975-01-31 1976-07-31 Hitachi Ltd
US4042777A (en) * 1975-10-06 1977-08-16 International Business Machines Corporation One-handed keyboard and its control means
US4106011A (en) * 1975-10-24 1978-08-08 Tektronix, Inc. Keyboard circuit
US4024534A (en) * 1975-11-24 1977-05-17 Xerox Corporation Keyboard encoding with repeat key pause
US4164666A (en) * 1976-06-08 1979-08-14 Toyko Shibaura Electric Co., Ltd. Electronic apparatus using complementary MOS transistor dynamic clocked logic circuits
US4211915A (en) * 1978-12-04 1980-07-08 General Electric Company Keyboard verification system
US4684934A (en) * 1983-02-28 1987-08-04 Data General Corporation Method and apparatus for storing and retrieving keyboard LED data
ES2040172B1 (es) * 1991-12-31 1994-05-01 Alcatel Standard Electrica Procedimiento y dispositivo para la lectura de teclados.
US5861583A (en) * 1992-06-08 1999-01-19 Synaptics, Incorporated Object position detector
EP0574213B1 (de) * 1992-06-08 1999-03-24 Synaptics, Inc. Objekt-Positionsdetektor
US6239389B1 (en) 1992-06-08 2001-05-29 Synaptics, Inc. Object position detection system and method
US6028271A (en) * 1992-06-08 2000-02-22 Synaptics, Inc. Object position detector with edge motion feature and gesture recognition
US5880411A (en) 1992-06-08 1999-03-09 Synaptics, Incorporated Object position detector with edge motion feature and gesture recognition
US5889236A (en) * 1992-06-08 1999-03-30 Synaptics Incorporated Pressure sensitive scrollbar feature
US6380929B1 (en) 1996-09-20 2002-04-30 Synaptics, Incorporated Pen drawing computer input device
US5854625A (en) * 1996-11-06 1998-12-29 Synaptics, Incorporated Force sensing touchpad
CN105680875B (zh) * 2016-01-05 2018-07-24 湖南工业大学 矩阵式键盘操作识别及编码电路
CN108649962B (zh) * 2016-01-05 2022-01-21 湖南工业大学 一种独立式键盘扫描编码方法
CN108880560B (zh) * 2016-01-05 2022-03-18 湖南工业大学 一种矩阵式键盘反转法扫描电路

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1060878A (en) * 1965-06-18 1967-03-08 Creed & Co Ltd Code generating keyboards
US3308918A (en) * 1965-09-20 1967-03-14 Ibm Pseudo-interlock employing strobe signal with selected keys
US3568183A (en) * 1968-07-09 1971-03-02 Gen Electric Keyboard synchronized toned generator

Also Published As

Publication number Publication date
ES394738A1 (es) 1974-10-01
GB1316215A (en) 1973-05-09
BE772502A (fr) 1972-01-17
NO131956B (de) 1975-05-20
SE361222B (de) 1973-10-22
DE2145119A1 (de) 1972-03-23
NL7112625A (de) 1972-03-16
FR2112956A5 (de) 1972-06-23
CH535458A (de) 1973-03-31
NL178455B (nl) 1985-10-16
US3675239A (en) 1972-07-04
NL178455C (nl) 1986-03-17
DE2145119C3 (de) 1973-10-11
ZA715289B (en) 1972-04-26
AU3232171A (en) 1973-02-15
AT313608B (de) 1974-02-25
NO131956C (de) 1975-08-27
DE2145119B2 (de) 1973-03-22
AU443750B2 (en) 1974-01-03
BR7105984D0 (pt) 1973-04-10

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