GB1059606A - A ringer - Google Patents

A ringer

Info

Publication number
GB1059606A
GB1059606A GB3330965A GB3330965A GB1059606A GB 1059606 A GB1059606 A GB 1059606A GB 3330965 A GB3330965 A GB 3330965A GB 3330965 A GB3330965 A GB 3330965A GB 1059606 A GB1059606 A GB 1059606A
Authority
GB
United Kingdom
Prior art keywords
aug
substation
ringer
oscillations
heading
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
GB3330965A
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.)
Italtel SpA
Original Assignee
Societa Italiana Telecomunicazioni Siemens SpA
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 Societa Italiana Telecomunicazioni Siemens SpA filed Critical Societa Italiana Telecomunicazioni Siemens SpA
Publication of GB1059606A publication Critical patent/GB1059606A/en
Expired legal-status Critical Current

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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

1,059,606. Substation circuits. SOC. ITALIANA TELECOMUNICAZIONI SIEMENS S.p.A. Aug. 4, 1965 [Aug. 25, 1964], No. 33309/65. Heading H4K. In a substation circuit, the oscillations from a transistor oscillator which is adjustable as regards frequency and output level are modulated by rectified ringing current and fed to a transducer to emit a characteristic calling signal.
GB3330965A 1964-08-25 1965-08-04 A ringer Expired GB1059606A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1831964 1964-08-25
IT833666 1966-04-13

Publications (1)

Publication Number Publication Date
GB1059606A true GB1059606A (en) 1967-02-22

Family

ID=26326037

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3330965A Expired GB1059606A (en) 1964-08-25 1965-08-04 A ringer
GB511467A Expired GB1117340A (en) 1964-08-25 1967-02-02 A ringer device

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB511467A Expired GB1117340A (en) 1964-08-25 1967-02-02 A ringer device

Country Status (3)

Country Link
DE (2) DE1265231B (en)
GB (2) GB1059606A (en)
NL (2) NL6511059A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240239A (en) * 1990-01-17 1991-07-24 Carl Mikael Bellman Aktiebolag Sound-signal device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2548159C2 (en) * 1975-10-28 1983-05-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for the acoustic call in an executive and secretary telephone system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108749B (en) * 1958-05-06 1961-06-15 Telefonbau Circuit arrangement for triggering a tone-frequency call to subscriber stations in telephone systems
NL252052A (en) * 1959-05-28
GB956356A (en) * 1960-07-21 1964-04-22 Standard Telephones Cables Ltd Improvements in or relating to signalling methods between subscriber's sets and exchage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240239A (en) * 1990-01-17 1991-07-24 Carl Mikael Bellman Aktiebolag Sound-signal device

Also Published As

Publication number Publication date
DE1289130B (en) 1969-02-13
NL6703645A (en) 1967-10-16
DE1265231B (en) 1968-04-04
GB1117340A (en) 1968-06-19
NL6511059A (en) 1966-02-28

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