GB328120A - Improvements in or relating to automatic or semi-automatic telephone systems - Google Patents

Improvements in or relating to automatic or semi-automatic telephone systems

Info

Publication number
GB328120A
GB328120A GB1284329A GB1284329A GB328120A GB 328120 A GB328120 A GB 328120A GB 1284329 A GB1284329 A GB 1284329A GB 1284329 A GB1284329 A GB 1284329A GB 328120 A GB328120 A GB 328120A
Authority
GB
United Kingdom
Prior art keywords
automatic
semi
relating
over
telephone systems
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
GB1284329A
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.)
CHARLES WILFRID WILLIAM
COVENTRY AUTOM TELEPHONES Ltd
Original Assignee
CHARLES WILFRID WILLIAM
COVENTRY AUTOM TELEPHONES Ltd
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 CHARLES WILFRID WILLIAM, COVENTRY AUTOM TELEPHONES Ltd filed Critical CHARLES WILFRID WILLIAM
Priority to GB1284329A priority Critical patent/GB328120A/en
Publication of GB328120A publication Critical patent/GB328120A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

328,120. Coventry Automatic Telephones, Ltd., and Wilman, C. W. April 25, 1929. Automatic and semi-automatic exchange systems. - A second group selector S2 may be reached by an ordinary subscriber over a first group selector S1 or by an operator over a non- numerical switch PO, and in the latter case is arranged to send dialling tone by means of a circuit completed over an extra wiper 15 of the switch PO which connects the tone machine to the line relay A2, either directly, as shown, or indirectly through the medium of an additional relay in the selector S2.
GB1284329A 1929-04-25 1929-04-25 Improvements in or relating to automatic or semi-automatic telephone systems Expired GB328120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1284329A GB328120A (en) 1929-04-25 1929-04-25 Improvements in or relating to automatic or semi-automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1284329A GB328120A (en) 1929-04-25 1929-04-25 Improvements in or relating to automatic or semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
GB328120A true GB328120A (en) 1930-04-24

Family

ID=10012138

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1284329A Expired GB328120A (en) 1929-04-25 1929-04-25 Improvements in or relating to automatic or semi-automatic telephone systems

Country Status (1)

Country Link
GB (1) GB328120A (en)

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