GB668460A - Calling signal retransmission device for two-wire telephone line - Google Patents

Calling signal retransmission device for two-wire telephone line

Info

Publication number
GB668460A
GB668460A GB5001/51A GB500151A GB668460A GB 668460 A GB668460 A GB 668460A GB 5001/51 A GB5001/51 A GB 5001/51A GB 500151 A GB500151 A GB 500151A GB 668460 A GB668460 A GB 668460A
Authority
GB
United Kingdom
Prior art keywords
telephone line
calling signal
cycle
wire telephone
retransmission device
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
GB5001/51A
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.)
Compagnie Industrielle des Telephones SA
Original Assignee
Compagnie Industrielle des Telephones SA
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 Compagnie Industrielle des Telephones SA filed Critical Compagnie Industrielle des Telephones SA
Publication of GB668460A publication Critical patent/GB668460A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

668,460. Two-way transmission. COMPAGNIE INDUSTRIELLE DES TELEPHONES. April 15, 1948 [June 26, 1947], No. 5001/51. Divided out of 668,369. Class 40 (iv). In a two-way ringing repeater in which a thyratron lo in firing in response to a half-cycle of a ringing signal applied to its grid induces a signal in the outgoing line e1, e2, via a transformer tpo in its anode circuit, the thyratrons for both directions of transmission are quenched by a common auxiliary thyratron la which fires on the alternate half-cycle and induces a quenching potential in the plate circuits of the main valves. In Fig. Fig. 1 the anode circuits are transformer coupled and in another embodiment, Fig. 2 (not shown), the coupling is effected by condensers.
GB5001/51A 1947-06-26 1948-04-15 Calling signal retransmission device for two-wire telephone line Expired GB668460A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR272716X 1947-06-26

Publications (1)

Publication Number Publication Date
GB668460A true GB668460A (en) 1952-03-19

Family

ID=8886075

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5001/51A Expired GB668460A (en) 1947-06-26 1948-04-15 Calling signal retransmission device for two-wire telephone line

Country Status (3)

Country Link
CH (1) CH272716A (en)
GB (1) GB668460A (en)
NL (1) NL75769C (en)

Also Published As

Publication number Publication date
NL75769C (en)
CH272716A (en) 1950-12-31

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