GB314411A - Improvements in relay arrangements particularly for use in automatic or semi-automatic telephone systems - Google Patents

Improvements in relay arrangements particularly for use in automatic or semi-automatic telephone systems

Info

Publication number
GB314411A
GB314411A GB924028A GB924028A GB314411A GB 314411 A GB314411 A GB 314411A GB 924028 A GB924028 A GB 924028A GB 924028 A GB924028 A GB 924028A GB 314411 A GB314411 A GB 314411A
Authority
GB
United Kingdom
Prior art keywords
relay
contacts
automatic
relays
free
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
GB924028A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB924028A priority Critical patent/GB314411A/en
Publication of GB314411A publication Critical patent/GB314411A/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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

314,411. Standard Telephones & Cables, Ltd., and Skillman, T. S. March 27, 1928. Automatic exchange systems; amplifying systems for telephony.-A local circuit e.g. that of a relay IR, Figs. 1 and 2, for repeating dialling impulses comprises two or more contacts arranged in series and controlled directly or indirectly by voice frequency relays VF' which according to the Provisional Specification may be of the kind described in Specificactions 224,940; and 244,591, [Class 38 (v), Electric switches &c.]. Fig. 3 shows the application of the invention to an echo suppressing circuit, the operation of relays VF putting a paralyzing potential on the grid of the amplifying valve AV. Fig. 4 shows a dialling circuit, the vibratory relays VF controlling a telegraph relay T with its windings normally energized in opposition and arranged to control a switch M through a repeating relay IR. According to the Provisional Specification, both contacts may be controlled by a single relay with the contacts at the ends of a free-free reed or with the contacts at the free end of an ordinary reed which may be split.
GB924028A 1928-03-27 1928-03-27 Improvements in relay arrangements particularly for use in automatic or semi-automatic telephone systems Expired GB314411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB924028A GB314411A (en) 1928-03-27 1928-03-27 Improvements in relay arrangements particularly for use in automatic or semi-automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB924028A GB314411A (en) 1928-03-27 1928-03-27 Improvements in relay arrangements particularly for use in automatic or semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
GB314411A true GB314411A (en) 1929-06-27

Family

ID=9868103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB924028A Expired GB314411A (en) 1928-03-27 1928-03-27 Improvements in relay arrangements particularly for use in automatic or semi-automatic telephone systems

Country Status (1)

Country Link
GB (1) GB314411A (en)

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