JPS5224516A - Key switch operation detection circuit - Google Patents

Key switch operation detection circuit

Info

Publication number
JPS5224516A
JPS5224516A JP50100877A JP10087775A JPS5224516A JP S5224516 A JPS5224516 A JP S5224516A JP 50100877 A JP50100877 A JP 50100877A JP 10087775 A JP10087775 A JP 10087775A JP S5224516 A JPS5224516 A JP S5224516A
Authority
JP
Japan
Prior art keywords
key switch
detection circuit
operation detection
switch operation
capacitance element
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.)
Granted
Application number
JP50100877A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5715395B2 (enrdf_load_stackoverflow
Inventor
Toshio Tomizawa
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
Priority to JP50100877A priority Critical patent/JPS5224516A/ja
Priority to GB32940/76A priority patent/GB1555979A/en
Priority to US05/712,815 priority patent/US4148017A/en
Priority to CA258,932A priority patent/CA1086539A/en
Priority to DE2636281A priority patent/DE2636281C2/de
Priority to NL7609031A priority patent/NL7609031A/xx
Priority to IT26291/76A priority patent/IT1083954B/it
Publication of JPS5224516A publication Critical patent/JPS5224516A/ja
Priority to US06/076,319 priority patent/USRE32069E/en
Priority to CA358,207A priority patent/CA1098740A/en
Publication of JPS5715395B2 publication Critical patent/JPS5715395B2/ja
Granted legal-status Critical Current

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JP50100877A 1975-08-15 1975-08-20 Key switch operation detection circuit Granted JPS5224516A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP50100877A JPS5224516A (en) 1975-08-20 1975-08-20 Key switch operation detection circuit
GB32940/76A GB1555979A (en) 1975-08-15 1976-08-06 Device for detecting a key switch operation
US05/712,815 US4148017A (en) 1975-08-15 1976-08-09 Device for detecting a key switch operation
CA258,932A CA1086539A (en) 1975-08-15 1976-08-12 Device for detecting a key switch operation
DE2636281A DE2636281C2 (de) 1975-08-15 1976-08-12 Einrichtung zur Identifizierung betätigter Tastenschalter aus einer Vielzahl von Tastenschaltern
NL7609031A NL7609031A (nl) 1975-08-15 1976-08-13 Inrichting voor het detecteren van de werking van toetsschakelaars.
IT26291/76A IT1083954B (it) 1975-08-15 1976-08-13 Dispositivo per rivelare l'azionamento di interruttori relativi a tasti
US06/076,319 USRE32069E (en) 1975-08-15 1979-09-17 Device for detecting a key switch operation
CA358,207A CA1098740A (en) 1975-08-15 1980-08-13 Device for detecting a key switch operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50100877A JPS5224516A (en) 1975-08-20 1975-08-20 Key switch operation detection circuit

Publications (2)

Publication Number Publication Date
JPS5224516A true JPS5224516A (en) 1977-02-24
JPS5715395B2 JPS5715395B2 (enrdf_load_stackoverflow) 1982-03-30

Family

ID=14285540

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50100877A Granted JPS5224516A (en) 1975-08-15 1975-08-20 Key switch operation detection circuit

Country Status (1)

Country Link
JP (1) JPS5224516A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04100878A (ja) * 1990-08-17 1992-04-02 Sekisui Chem Co Ltd 接着方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61205493U (enrdf_load_stackoverflow) * 1985-06-15 1986-12-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04100878A (ja) * 1990-08-17 1992-04-02 Sekisui Chem Co Ltd 接着方法

Also Published As

Publication number Publication date
JPS5715395B2 (enrdf_load_stackoverflow) 1982-03-30

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