GB255130A - Improvements in automatic or semi-automatic telephone systems - Google Patents

Improvements in automatic or semi-automatic telephone systems

Info

Publication number
GB255130A
GB255130A GB697225A GB697225A GB255130A GB 255130 A GB255130 A GB 255130A GB 697225 A GB697225 A GB 697225A GB 697225 A GB697225 A GB 697225A GB 255130 A GB255130 A GB 255130A
Authority
GB
United Kingdom
Prior art keywords
automatic
semi
operator
marked
busy
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
GB697225A
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.)
WESTERN ELECTRIC CO Ltd
AT&T Corp
Original Assignee
WESTERN ELECTRIC CO Ltd
Western Electric Co Inc
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 WESTERN ELECTRIC CO Ltd, Western Electric Co Inc filed Critical WESTERN ELECTRIC CO Ltd
Priority to GB697225A priority Critical patent/GB255130A/en
Priority to FR612702D priority patent/FR612702A/en
Publication of GB255130A publication Critical patent/GB255130A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

255,130. Standard Telephones & Cables, Ltd., (formerly Western Electric Co., Ltd.), and Lowry, L. P. March 14, 1925. Semi-automatic exchange systems. - An impulse-sending mechanism of the type which is temporarily associated with an operator's keyboard during the establishment of a connection is marked continuously busy during release until all the component parts are fully restored to normal. The mechanism has motor-driven interrupter-springs which are tested as to their operative condition each time the apparatus is taken into use and if they are faulty, i.e., either permanently open or permanently closed, an alarm is operated and the mechanism marked busy. If less than the full normal number of digits is set up, the call is routed to a special operator and the partial setting of the register is cancelled. The invention is described with reference to apparatus which forms part of the complete system described in Specification 254,183. Specifications 253,574 and 253,575 also are referred to.
GB697225A 1925-03-14 1925-03-14 Improvements in automatic or semi-automatic telephone systems Expired GB255130A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB697225A GB255130A (en) 1925-03-14 1925-03-14 Improvements in automatic or semi-automatic telephone systems
FR612702D FR612702A (en) 1925-03-14 1926-03-12 Improvements to automatic or semi-automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB697225A GB255130A (en) 1925-03-14 1925-03-14 Improvements in automatic or semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
GB255130A true GB255130A (en) 1926-07-14

Family

ID=9824189

Family Applications (1)

Application Number Title Priority Date Filing Date
GB697225A Expired GB255130A (en) 1925-03-14 1925-03-14 Improvements in automatic or semi-automatic telephone systems

Country Status (2)

Country Link
FR (1) FR612702A (en)
GB (1) GB255130A (en)

Also Published As

Publication number Publication date
FR612702A (en) 1926-10-29

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