AU7194474A - Key switch scanning and encoding system - Google Patents

Key switch scanning and encoding system

Info

Publication number
AU7194474A
AU7194474A AU71944/74A AU7194474A AU7194474A AU 7194474 A AU7194474 A AU 7194474A AU 71944/74 A AU71944/74 A AU 71944/74A AU 7194474 A AU7194474 A AU 7194474A AU 7194474 A AU7194474 A AU 7194474A
Authority
AU
Australia
Prior art keywords
key switch
encoding system
switch scanning
scanning
encoding
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
AU71944/74A
Other versions
AU477539B2 (en
Inventor
R. GRIFFITH and RALPH DEUTSCH GLEN
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co Ltd
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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Application granted granted Critical
Publication of AU477539B2 publication Critical patent/AU477539B2/en
Publication of AU7194474A publication Critical patent/AU7194474A/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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/18—Selecting circuits
    • G10H1/182—Key multiplexing
AU71944/74A 1973-08-09 1974-08-01 Key switch scanning and encoding system Expired AU477539B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
USUS386968 1973-08-09
US386968A US3899951A (en) 1973-08-09 1973-08-09 Key switch scanning and encoding system

Publications (2)

Publication Number Publication Date
AU477539B2 AU477539B2 (en) 1976-02-05
AU7194474A true AU7194474A (en) 1976-02-05

Family

ID=

Also Published As

Publication number Publication date
JPS5933919B2 (en) 1984-08-18
DE2438196A1 (en) 1975-04-30
NL170471B (en) 1982-06-01
IT1019809B (en) 1977-11-30
US3899951A (en) 1975-08-19
JPS60258593A (en) 1985-12-20
GB1472637A (en) 1977-05-04
NL7410473A (en) 1975-02-11
JPH0137752B2 (en) 1989-08-09
CA1015180A (en) 1977-08-09
JPS5041523A (en) 1975-04-16
NL170471C (en) 1982-11-01

Similar Documents

Publication Publication Date Title
CA1015180A (en) Key switch scanning and encoding system
CA1026237A (en) Key board switch
CA981733A (en) Pushbutton keyboard system
CA991876A (en) Turnover key and corresponding cylinder lock
CA991306A (en) Piezoelectric key
CA1018270A (en) Key telephone system using time division and space division control
CA986159A (en) Security system and lock therefor
AU7027374A (en) Key switch apparatus
CA1022358A (en) Key
AU467339B2 (en) Coded signal switching network
CA1019369A (en) Tamperproof lock switch
CA958741A (en) Isolating switch construction and improved mechanism therefor
CA1008779A (en) Solid state keyboard switch
CA1013264A (en) Output encoder for key switch matrix
CA984168A (en) Key cylinder and electrical switch
CA1010096A (en) Key switch apparatus
CA1003013A (en) Reed and reed switch therefor
CA1020261A (en) Tsps key scanner
CA1010104A (en) Pedestal lock system
AU477539B2 (en) Key switch scanning and encoding system
CA1010166A (en) Key telephone system
CA1019793A (en) Pushbutton keyboard system
CA985414A (en) Magnetic key slide switch construction
CA930836A (en) Coded key switching system
AU482203B2 (en) Keyboard signal encoding system