GB283907A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB283907A
GB283907A GB1821/28A GB182128A GB283907A GB 283907 A GB283907 A GB 283907A GB 1821/28 A GB1821/28 A GB 1821/28A GB 182128 A GB182128 A GB 182128A GB 283907 A GB283907 A GB 283907A
Authority
GB
United Kingdom
Prior art keywords
selector
current
selectors
magnet
relating
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
GB1821/28A
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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 Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Publication of GB283907A publication Critical patent/GB283907A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

283,907. Associated Telephone & Telegraph Co., (Assignees of Wicks, J.). Aug. 26, 1926, [Convention date]. Drawings to Specification. Automatic exchange party line systems.-The driving magnets of selectors are supplied with current for numerical operation over both talking wires in series and a bridge at a preceding selector. The invention is described in its application to group selectors, and simple, rotary and party-line connectors, with reference to a system which is identical with that described in Specification 276,656, the driving magnet of a selector receiving current over the loop as soon as the selector is seized, this current being increased to operate the magnet by short-circuiting a resistance at the preceding selector.
GB1821/28A 1926-08-26 1927-08-11 Improvements in or relating to telephone systems Expired GB283907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US131575A US1772472A (en) 1926-08-26 1926-08-26 Automatic telephone system

Publications (1)

Publication Number Publication Date
GB283907A true GB283907A (en) 1928-03-22

Family

ID=22450054

Family Applications (2)

Application Number Title Priority Date Filing Date
GB21210/27A Expired GB276656A (en) 1926-08-26 1927-08-11 Improvements in and relating to telephone systems
GB1821/28A Expired GB283907A (en) 1926-08-26 1927-08-11 Improvements in or relating to telephone systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB21210/27A Expired GB276656A (en) 1926-08-26 1927-08-11 Improvements in and relating to telephone systems

Country Status (2)

Country Link
US (1) US1772472A (en)
GB (2) GB276656A (en)

Also Published As

Publication number Publication date
US1772472A (en) 1930-08-12
GB276656A (en) 1928-11-12

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