CH301277A - Installation téléphonique. - Google Patents

Installation téléphonique.

Info

Publication number
CH301277A
CH301277A CH301277DA CH301277A CH 301277 A CH301277 A CH 301277A CH 301277D A CH301277D A CH 301277DA CH 301277 A CH301277 A CH 301277A
Authority
CH
Switzerland
Prior art keywords
telephone installation
telephone
installation
Prior art date
Application number
Other languages
English (en)
Inventor
Automatic Telephone El Limited
Original Assignee
Automatic Telephone & Elect
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 Automatic Telephone & Elect filed Critical Automatic Telephone & Elect
Publication of CH301277A publication Critical patent/CH301277A/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
CH301277D 1948-10-05 1950-08-31 Installation téléphonique. CH301277A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25927/48A GB657069A (en) 1948-10-05 1948-10-05 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
CH301277A true CH301277A (fr) 1954-08-31

Family

ID=10235584

Family Applications (1)

Application Number Title Priority Date Filing Date
CH301277D CH301277A (fr) 1948-10-05 1950-08-31 Installation téléphonique.

Country Status (5)

Country Link
US (1) US2706751A (fr)
BE (1) BE491496A (fr)
CH (1) CH301277A (fr)
DE (1) DE902143C (fr)
GB (1) GB657069A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832838A (en) * 1952-07-28 1958-04-29 Gen Dynamics Corp Electronic ringing apparatus

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE16363E (en) * 1915-11-29 1926-06-15 Vacuum type invebteb convebteb
US1725053A (en) * 1923-09-10 1929-08-20 Ass Elect Ind Production of high-tension electric currents by means of transformers such as induction coils
US1956353A (en) * 1932-02-01 1934-04-24 Associated Electric Lab Inc Tone generator
FR735581A (fr) * 1932-04-20 1932-11-10 Perfectionnements apportés aux procédés d'appel et de commutation en téléphonie
US2208400A (en) * 1937-03-20 1940-07-16 Western Union Telegraph Co Electric conversion system
US2210576A (en) * 1938-09-16 1940-08-06 Ibm Signaling system
US2225907A (en) * 1939-05-25 1940-12-24 Bell Telephone Labor Inc Ringing current supply system
US2276660A (en) * 1940-08-01 1942-03-17 Bell Telephone Labor Inc Tone generator
US2335512A (en) * 1941-07-03 1943-11-30 Automatic Elect Lab Telephone ringing apparatus
BE469511A (fr) * 1941-07-08
US2375158A (en) * 1941-12-01 1945-05-01 Brown Instr Co Measuring apparatus
NL61324C (fr) * 1942-03-10
US2436482A (en) * 1943-12-02 1948-02-24 Rca Corp Electronic trigger circuit
BE469835A (fr) * 1944-09-15
US2501520A (en) * 1945-05-16 1950-03-21 Armour & Co Section model of meat animals

Also Published As

Publication number Publication date
US2706751A (en) 1955-04-19
BE491496A (fr)
DE902143C (de) 1954-01-18
GB657069A (en) 1951-09-12

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