CA937875A - N-key rollover keyboard - Google Patents
N-key rollover keyboardInfo
- Publication number
- CA937875A CA937875A CA133161A CA133161A CA937875A CA 937875 A CA937875 A CA 937875A CA 133161 A CA133161 A CA 133161A CA 133161 A CA133161 A CA 133161A CA 937875 A CA937875 A CA 937875A
- Authority
- CA
- Canada
- Prior art keywords
- key rollover
- keyboard
- rollover keyboard
- key
- rollover
- 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
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
- 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)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Input From Keyboards Or The Like (AREA)
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)
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 |
FR2139237A5 (en) | 1973-01-05 |
CH567762A5 (en) | 1975-10-15 |
DE2219288A1 (en) | 1972-11-30 |
HK5478A (en) | 1978-02-03 |
DE2219288B2 (en) | 1975-09-04 |
JPS5329970B1 (en) | 1978-08-24 |
NL152996B (en) | 1977-04-15 |
IT950268B (en) | 1973-06-20 |
BR7202800D0 (en) | 1973-06-12 |
NL7205053A (en) | 1972-11-21 |
GB1380282A (en) | 1975-01-08 |
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