CA937875A - N-key rollover keyboard - Google Patents

N-key rollover keyboard

Info

Publication number: CA937875A
Authority: CA; Canada
Prior art keywords: key rollover; keyboard; rollover keyboard; key; rollover
Prior art date: 1971-05-19
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

CA133161A

Inventor

M. Bernin Victor

A. Engstrom Keith

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.)

Illinois Tool Works Inc

Original Assignee

Illinois Tool Works Inc

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.)

1971-05-19

Filing date

1972-01-25

Publication date

1973-12-04

1972-01-25 Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc

1973-12-04 Application granted granted Critical

1973-12-04 Publication of CA937875A publication Critical patent/CA937875A/en

Status Expired legal-status Critical Current

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
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/80—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices
- H03K17/81—Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/965—Switches controlled by moving an element forming part of the switch
- H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
- H03K17/972—Switches controlled by moving an element forming part of the switch using a magnetic movable element having a plurality of control members, e.g. keyboard
- 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
- H03M11/02—Details

Landscapes

Engineering & Computer Science (AREA)
Theoretical Computer Science (AREA)
Physics & Mathematics (AREA)
Nonlinear Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Input From Keyboards Or The Like (AREA)

CA133161A 1971-05-19 1972-01-25 N-key rollover keyboard Expired CA937875A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US14490271A	1971-05-19	1971-05-19

Publications (1)

Publication Number	Publication Date
CA937875A true CA937875A (en)	1973-12-04

Family

ID=22510654

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA133161A Expired CA937875A (en)	1971-05-19	1972-01-25	N-key rollover keyboard

Country Status (11)

Country	Link
JP (1)	JPS5329970B1 (en)
BR (1)	BR7202800D0 (en)
CA (1)	CA937875A (en)
CH (1)	CH567762A5 (en)
DE (1)	DE2219288B2 (en)
FR (1)	FR2139237A5 (en)
GB (1)	GB1380282A (en)
HK (1)	HK5478A (en)
IT (1)	IT950268B (en)
NL (1)	NL152996B (en)
SE (1)	SE375392B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3003139A (en) *	1955-04-29	1961-10-03	Gen Electronic Lab Inc	Electrical information storage system
US3193809A (en) *	1961-05-03	1965-07-06	Sylvania Electric Prod	Memory noise cancellation
US3675239A (en) *	1970-09-14	1972-07-04	Ncr Co	Unlimited roll keyboard circuit

1972
- 1972-01-25 CA CA133161A patent/CA937875A/en not_active Expired
- 1972-02-22 JP JP1775172A patent/JPS5329970B1/ja active Pending
- 1972-03-16 IT IT2194172A patent/IT950268B/en active
- 1972-03-24 SE SE381872A patent/SE375392B/xx unknown
- 1972-03-29 CH CH468172A patent/CH567762A5/xx not_active IP Right Cessation
- 1972-03-30 FR FR7211268A patent/FR2139237A5/fr not_active Expired
- 1972-04-14 NL NL7205053A patent/NL152996B/en not_active IP Right Cessation
- 1972-04-20 DE DE19722219288 patent/DE2219288B2/en not_active Ceased
- 1972-05-05 BR BR280072A patent/BR7202800D0/en unknown
- 1972-05-17 GB GB2325172A patent/GB1380282A/en not_active Expired
1978
- 1978-01-26 HK HK5478A patent/HK5478A/en unknown

Also Published As

Publication number	Publication date
SE375392B (en)	1975-04-14
DE2219288A1 (en)	1972-11-30
JPS5329970B1 (en)	1978-08-24
HK5478A (en)	1978-02-03
BR7202800D0 (en)	1973-06-12
NL152996B (en)	1977-04-15
GB1380282A (en)	1975-01-08
DE2219288B2 (en)	1975-09-04
FR2139237A5 (en)	1973-01-05
CH567762A5 (en)	1975-10-15
NL7205053A (en)	1972-11-21
IT950268B (en)	1973-06-20

Publication	Publication Date	Title
CA966181A (en)	1975-04-15	Pushbutton keyboard system
CA983998A (en)	1976-02-17	Battery-carrying arrangement
CA990296A (en)	1976-06-01	6-acylaminophenyl-4,5-dihydropyridazones
CA952033A (en)	1974-07-30	Keyboard encoder
CA973805A (en)	1975-09-02	Keyboard with roll-over feature
CA977516A (en)	1975-11-11	Carbon fabrication
AU463873B2 (en)	1975-08-07	1, 4-bis-ACYLPIPERAZINES
CA950425A (en)	1974-07-02	Keyboard locking device
AU463038B2 (en)	1975-06-26	Improvements inspeech synthesisers
AU468410B2 (en)	1973-10-18	2, 4-diamino-5-benzyl-pyrimidines
CA937875A (en)	1973-12-04	N-key rollover keyboard
AU455740B2 (en)	1973-08-09	N-key rollover keyboard
AU3871472A (en)	1973-08-09	N-key rollover keyboard
CA940834A (en)	1974-01-29	Keyboards
AU468447B2 (en)	1976-01-15	2, 4-diamino-5-benzyl-pyrimidines
CA958910A (en)	1974-12-10	Keys
CA966105A (en)	1975-04-15	Keyboard
CA872838A (en)	1971-06-08	2-bromo-1,1,2,3,3-pentafluoropropane
CA975378A (en)	1975-09-30	5-hydoxymethyl-(1,3-dioxa-2-silacyclohexanes)
AU476938B2 (en)	1975-02-27	N-key rollover keyboard
CA976543A (en)	1975-10-21	4,6,8(14)-triene-steroids
AU468307B2 (en)	1973-10-04	1, 2-biguanides
CA877464A (en)	1971-08-03	Photoelectric keyboard
CA877466A (en)	1971-08-03	Photoelectric keyboard
CA877465A (en)	1971-08-03	Photoelectric keyboard