JPS5419306A - Switch circuit for push button dial telephone set - Google Patents

Switch circuit for push button dial telephone set

Info

Publication number
JPS5419306A
JPS5419306A JP8450777A JP8450777A JPS5419306A JP S5419306 A JPS5419306 A JP S5419306A JP 8450777 A JP8450777 A JP 8450777A JP 8450777 A JP8450777 A JP 8450777A JP S5419306 A JPS5419306 A JP S5419306A
Authority
JP
Japan
Prior art keywords
push button
switch circuit
telephone set
dial telephone
button dial
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
JP8450777A
Other languages
Japanese (ja)
Other versions
JPS569815B2 (en
Inventor
Makoto Yoshitoshi
Koichi Matsumoto
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 Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP8450777A priority Critical patent/JPS5419306A/en
Publication of JPS5419306A publication Critical patent/JPS5419306A/en
Publication of JPS569815B2 publication Critical patent/JPS569815B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits

Abstract

PURPOSE:To eliminate the adverse effect by chattering and wrong contacts, by coupling two sets of monostable multi-vibrators operated with the driving signal obtained at mechanical contact switching with the set-reset type FF.
JP8450777A 1977-07-14 1977-07-14 Switch circuit for push button dial telephone set Granted JPS5419306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8450777A JPS5419306A (en) 1977-07-14 1977-07-14 Switch circuit for push button dial telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8450777A JPS5419306A (en) 1977-07-14 1977-07-14 Switch circuit for push button dial telephone set

Publications (2)

Publication Number Publication Date
JPS5419306A true JPS5419306A (en) 1979-02-14
JPS569815B2 JPS569815B2 (en) 1981-03-04

Family

ID=13832551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8450777A Granted JPS5419306A (en) 1977-07-14 1977-07-14 Switch circuit for push button dial telephone set

Country Status (1)

Country Link
JP (1) JPS5419306A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197636A (en) * 1981-05-29 1982-12-03 Fujitsu Ltd Chattering preventing circuit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7431696B2 (en) 2020-08-04 2024-02-15 信越化学工業株式会社 Positive photosensitive resin composition, positive photosensitive dry film, method for producing positive photosensitive dry film, pattern forming method, cured film forming method, interlayer insulating film, surface protective film, and electronic components
JP7335217B2 (en) 2020-09-24 2023-08-29 信越化学工業株式会社 Photosensitive resin composition, pattern forming method, cured film forming method, interlayer insulating film, surface protective film, and electronic component
JP2022147792A (en) 2021-03-23 2022-10-06 信越化学工業株式会社 Positive type photosensitive resin composition, positive type photosensitive dry film, method for producing positive type photosensitive dry film, pattern formation method, cured film formation method, interlayer insulating film, surface protective film, and electronic component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197636A (en) * 1981-05-29 1982-12-03 Fujitsu Ltd Chattering preventing circuit

Also Published As

Publication number Publication date
JPS569815B2 (en) 1981-03-04

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