IT1163231B - KEYBOARD WITHOUT CONTACTS INCLUDING A MATRIX OF KEYS - Google Patents
KEYBOARD WITHOUT CONTACTS INCLUDING A MATRIX OF KEYSInfo
- Publication number
- IT1163231B IT1163231B IT8320467A IT2046783A IT1163231B IT 1163231 B IT1163231 B IT 1163231B IT 8320467 A IT8320467 A IT 8320467A IT 2046783 A IT2046783 A IT 2046783A IT 1163231 B IT1163231 B IT 1163231B
- Authority
- IT
- Italy
- Prior art keywords
- keys
- keyboard
- matrix
- contacts including
- contacts
- Prior art date
Links
- 239000011159 matrix material Substances 0.000 title 1
Classifications
-
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH215482 | 1982-04-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8320467A0 IT8320467A0 (en) | 1983-04-06 |
IT1163231B true IT1163231B (en) | 1987-04-08 |
Family
ID=4227142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT8320467A IT1163231B (en) | 1982-04-07 | 1983-04-06 | KEYBOARD WITHOUT CONTACTS INCLUDING A MATRIX OF KEYS |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0105287A1 (en) |
CA (1) | CA1204840A (en) |
IT (1) | IT1163231B (en) |
WO (1) | WO1983003725A1 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3698531A (en) * | 1970-10-26 | 1972-10-17 | Illinois Tool Works | Solid state switch |
DE2538531A1 (en) * | 1975-08-29 | 1977-03-10 | Siemens Ag | Non-contact proximity sensor using capacitive-inductive oscillator - has beat frequency circuit with regulating loop for compensation against humidity variations |
US4398180A (en) * | 1980-06-26 | 1983-08-09 | International Standard Electric Corporation | Contactless keyboard |
-
1983
- 1983-04-06 CA CA000425273A patent/CA1204840A/en not_active Expired
- 1983-04-06 IT IT8320467A patent/IT1163231B/en active
- 1983-04-07 WO PCT/CH1983/000043 patent/WO1983003725A1/en not_active Application Discontinuation
- 1983-04-07 EP EP83900900A patent/EP0105287A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
EP0105287A1 (en) | 1984-04-18 |
WO1983003725A1 (en) | 1983-10-27 |
IT8320467A0 (en) | 1983-04-06 |
CA1204840A (en) | 1986-05-20 |
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