GB235064A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB235064A
GB235064A GB2255324A GB2255324A GB235064A GB 235064 A GB235064 A GB 235064A GB 2255324 A GB2255324 A GB 2255324A GB 2255324 A GB2255324 A GB 2255324A GB 235064 A GB235064 A GB 235064A
Authority
GB
United Kingdom
Prior art keywords
relay
line switch
call
telephone systems
case
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
GB2255324A
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.)
COVENTRY AUTOM TELEPHONES Ltd
Original Assignee
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 COVENTRY AUTOM TELEPHONES Ltd filed Critical COVENTRY AUTOM TELEPHONES Ltd
Priority to GB2255324A priority Critical patent/GB235064A/en
Publication of GB235064A publication Critical patent/GB235064A/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)
  • Interface Circuits In Exchanges (AREA)

Abstract

235,064. Coventry Automatic Telephones, Ltd., and Collyer, J. E. Sept. 24, 1924. Automatic telephone systems.- A rotary line switch of the nonormal type advances a step upon release in the case of an unsuccessful call only. In the arrangement described, the line switch, Fig. 1, gives access to a group of two-wire trunks, and may be reached over one or more selectors. A repeater, Fig. 2, is associated with each trunk. A slow release relay 11 is connected in series with the usual switching relay 12, and in the case of an unsuccessful call, when relay 12 falls back, the magnet 7 is momentarily connected up over a wiper 20 before relay 11 and the line relav 1 relapse. If the call has been answered, a slow release relay 63 controlled by the reversing relay 59 is energized, and advance of the line switch is prevented.
GB2255324A 1924-09-24 1924-09-24 Improvements in or relating to telephone systems Expired GB235064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2255324A GB235064A (en) 1924-09-24 1924-09-24 Improvements in or relating to telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2255324A GB235064A (en) 1924-09-24 1924-09-24 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB235064A true GB235064A (en) 1925-06-11

Family

ID=10181281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2255324A Expired GB235064A (en) 1924-09-24 1924-09-24 Improvements in or relating to telephone systems

Country Status (1)

Country Link
GB (1) GB235064A (en)

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