BR7400952D0 - Aperfeicoamentos em dispositivo de discar, tipo botao de aperto - Google Patents

Aperfeicoamentos em dispositivo de discar, tipo botao de aperto

Info

Publication number
BR7400952D0
BR7400952D0 BR952/74A BR95274A BR7400952D0 BR 7400952 D0 BR7400952 D0 BR 7400952D0 BR 952/74 A BR952/74 A BR 952/74A BR 95274 A BR95274 A BR 95274A BR 7400952 D0 BR7400952 D0 BR 7400952D0
Authority
BR
Brazil
Prior art keywords
type button
dialing device
tightening type
tightening
dialing
Prior art date
Application number
BR952/74A
Other languages
English (en)
Inventor
Sekiguchi Kouichi
Original Assignee
Iwatsu Electric 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
Priority claimed from JP1611973A external-priority patent/JPS5413124B2/ja
Priority claimed from JP10595173A external-priority patent/JPS5413282B2/ja
Application filed by Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Publication of BR7400952D0 publication Critical patent/BR7400952D0/pt

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
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
BR952/74A 1973-02-10 1974-02-08 Aperfeicoamentos em dispositivo de discar, tipo botao de aperto BR7400952D0 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1611973A JPS5413124B2 (pt) 1973-02-10 1973-02-10
JP10595173A JPS5413282B2 (pt) 1973-09-21 1973-09-21

Publications (1)

Publication Number Publication Date
BR7400952D0 true BR7400952D0 (pt) 1974-09-10

Family

ID=26352373

Family Applications (1)

Application Number Title Priority Date Filing Date
BR952/74A BR7400952D0 (pt) 1973-02-10 1974-02-08 Aperfeicoamentos em dispositivo de discar, tipo botao de aperto

Country Status (4)

Country Link
US (1) US3891940A (pt)
BR (1) BR7400952D0 (pt)
DE (1) DE2406071A1 (pt)
GB (1) GB1467026A (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103115A (en) * 1977-01-03 1978-07-25 American Communication Systems, Inc. Memory tone dialer
FR2399161A1 (fr) * 1977-07-25 1979-02-23 Thomson Csf Poste telephonique pour liaison par fibres optiques
JPS6027204A (ja) * 1983-07-23 1985-02-12 Murata Mfg Co Ltd 発振回路装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543779A (fr) * 1966-12-23 Ibm Dispositif engendrant un son
US3617646A (en) * 1969-07-22 1971-11-02 Bell Telephone Labor Inc Multifrequency oscillator employing solid-state device switching for frequency selection

Also Published As

Publication number Publication date
US3891940A (en) 1975-06-24
GB1467026A (en) 1977-03-16
DE2406071A1 (de) 1974-10-10

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