GB196626A - Improvements in telephone repeating systems - Google Patents

Improvements in telephone repeating systems

Info

Publication number
GB196626A
GB196626A GB10981/23A GB1098123A GB196626A GB 196626 A GB196626 A GB 196626A GB 10981/23 A GB10981/23 A GB 10981/23A GB 1098123 A GB1098123 A GB 1098123A GB 196626 A GB196626 A GB 196626A
Authority
GB
United Kingdom
Prior art keywords
pairs
pair
trunk
line
commutators
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
GB10981/23A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB196626A publication Critical patent/GB196626A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

196,626. Latour, M. April 22, 1922, [Convention date]. Repeating systems for telephones. A trunk line comprises two pairs of wires, each pair including one or more one-way repeaters R<1>, R<2>, and the subscribers' lines being connected to the pairs alternately by means of commutators C<1>, C<2>. The commutators may comprise two pairs of triode tubes in parallel, the anodes of which are supplied with alternating current, of frequency for example 2000, from a supply transformer 6, 6<1> so that the two pairs have voltages of opposite sign at any instant, one pair of tubes 3, 4 being connected so as to transmit from the subscriber's line A to one trunk pair L, and the other pair 3<1>, 4<1> being connected oppositely to transmit from the second trunk pair L' to the subscriber's line A. The feeding current frequency may be reduced by connecting the supply transformers to the filament battery. According to the Specification as open to inspection under Sect. 91 (3) (a), the apparatus may be used as a two-way repeater in a twowire trunk line by uniting the two pairs L, L<1>. This subject-matter does not appear in the Specification as accepted.
GB10981/23A 1922-04-22 1923-04-23 Improvements in telephone repeating systems Expired GB196626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR196626X 1922-04-22

Publications (1)

Publication Number Publication Date
GB196626A true GB196626A (en) 1924-06-05

Family

ID=8879590

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10981/23A Expired GB196626A (en) 1922-04-22 1923-04-23 Improvements in telephone repeating systems

Country Status (1)

Country Link
GB (1) GB196626A (en)

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