BE818412A - Sonnerie de tonalite electronique - Google Patents

Sonnerie de tonalite electronique

Info

Publication number
BE818412A
BE818412A BE2053788A BE2053788A BE818412A BE 818412 A BE818412 A BE 818412A BE 2053788 A BE2053788 A BE 2053788A BE 2053788 A BE2053788 A BE 2053788A BE 818412 A BE818412 A BE 818412A
Authority
BE
Belgium
Prior art keywords
electronic tone
tone ringing
ringing
electronic
tone
Prior art date
Application number
BE2053788A
Other languages
English (en)
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 filed Critical
Publication of BE818412A publication Critical patent/BE818412A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE2053788A 1973-08-02 1974-08-02 Sonnerie de tonalite electronique BE818412A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US385134A US3867585A (en) 1973-08-02 1973-08-02 Electronic tone ringer

Publications (1)

Publication Number Publication Date
BE818412A true BE818412A (fr) 1974-12-02

Family

ID=23520155

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2053788A BE818412A (fr) 1973-08-02 1974-08-02 Sonnerie de tonalite electronique

Country Status (4)

Country Link
US (1) US3867585A (fr)
BE (1) BE818412A (fr)
CA (1) CA1001335A (fr)
DE (1) DE2436745A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965307A (en) * 1974-05-28 1976-06-22 Gte Automatic Electric Laboratories Incorporated Electronic tone ringer
US4081617A (en) * 1976-10-29 1978-03-28 Technex International Ltd. Electronic ringing circuit for telephone systems
IT1083388B (it) * 1977-06-20 1985-05-21 Cselt Centro Studi Lab Telecom Suoneria elettronica per apparecchi telefonici
US4163873A (en) * 1977-08-09 1979-08-07 Telephonic Equipment Corporation Telephone solid state ringer
USRE31398E (en) * 1977-10-19 1983-09-27 Floyd Bell Associates, Inc. Electronic audio signalling device for telephones
US4214131A (en) * 1978-12-18 1980-07-22 Floyd Bell Associates Inc. Electronic audio signalling device for telephones
US4251694A (en) * 1979-08-16 1981-02-17 Western Electric Company, Inc. Tone-ringing circuits and methods for telephone sets
DE3049811C2 (de) * 1979-08-20 1987-04-16 At & T Technologies, Inc., New York, N.Y. Schaltungsanordnung elektrischer Rufstromsignale in ein akustisches Signal
US4276448A (en) * 1979-08-20 1981-06-30 Bell Telephone Laboratories, Incorporated Electronic tone ringer
US4346265A (en) * 1979-12-17 1982-08-24 Texas Instruments Incorporated Annunciator
US4653087A (en) * 1980-02-11 1987-03-24 Galich Victor J Stereo interface telephone ring detector
US4406927A (en) * 1981-05-08 1983-09-27 International Telephone And Telegraph Corporation Electronic tone ringer
US4658419A (en) * 1981-07-22 1987-04-14 Floyd Bell Associates, Inc. Telephone ringer circuit
US4477697A (en) * 1982-11-22 1984-10-16 At&T Bell Laboratories Method and circuitry for encoding telephone ringing signals
US4508937A (en) * 1983-02-28 1985-04-02 At&T Information Systems Inc. Method and circuitry for encoding telephone ringing signals
DE4239943A1 (de) * 1992-11-27 1994-06-01 Ludwig Fes Telephonapparat für schwer gehörgeschädigte Personen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086702A (en) * 1964-10-15 1967-10-11 Post Office Electrical calling circuits
GB1209706A (en) * 1968-05-31 1970-10-21 Smiths Industries Ltd Improvements in or relating to the generation of oscillations
US3566254A (en) * 1969-05-19 1971-02-23 Us Navy Series-type voltage regulator
CA968477A (en) * 1972-07-24 1975-05-27 Microsystems International Limited Threshold circuit for tone-ringer or like load means

Also Published As

Publication number Publication date
CA1001335A (en) 1976-12-07
US3867585A (en) 1975-02-18
DE2436745A1 (de) 1975-02-13

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: GTE AUTOMATIC ELECTRIC LABORATORIES INC.

Effective date: 19870831