IT1163231B - KEYBOARD WITHOUT CONTACTS INCLUDING A MATRIX OF KEYS - Google Patents

KEYBOARD WITHOUT CONTACTS INCLUDING A MATRIX OF KEYS

Info

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
Application number
IT8320467A
Other languages
Italian (it)
Other versions
IT8320467A0 (en
Inventor
Johannes Rometsch
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of IT8320467A0 publication Critical patent/IT8320467A0/en
Application granted granted Critical
Publication of IT1163231B publication Critical patent/IT1163231B/en

Links

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
IT8320467A 1982-04-07 1983-04-06 KEYBOARD WITHOUT CONTACTS INCLUDING A MATRIX OF KEYS IT1163231B (en)

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)

* Cited by examiner, † Cited by third party
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

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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