GB493068A - Improvements in automatic switches for use in telephone or like systems - Google Patents

Improvements in automatic switches for use in telephone or like systems

Info

Publication number
GB493068A
GB493068A GB9226/37A GB922637A GB493068A GB 493068 A GB493068 A GB 493068A GB 9226/37 A GB9226/37 A GB 9226/37A GB 922637 A GB922637 A GB 922637A GB 493068 A GB493068 A GB 493068A
Authority
GB
United Kingdom
Prior art keywords
wipers
relay
magnet
energizes
springs
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
GB9226/37A
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB9226/37A priority Critical patent/GB493068A/en
Priority to US198170A priority patent/US2236808A/en
Publication of GB493068A publication Critical patent/GB493068A/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)
  • Monitoring And Testing Of Exchanges (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

493,068. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., TAYLOR, R., and BAKER, G. T. March 31, 1937, No. 9226. [Class 40 (iv)] A bidirectional group selector which upon release resumes its rotary movement to bring the wipers clear of the banks is provided with normal post springs which operate on a particular level and connect up an auxiliary magnet which allows the wipers to drop back. At the same time a wiper-switching relay is operated. The vertical magnet VM responds to the incoming digit in the usual manner and relay H energizes at the first vertical step. On the relapse of dialling relay C, the rotary magnet RM operates in a self-interrupting circuit as long as H is maintained by busy ground over test wiper P1. When an idle outlet or the 11th position is reached, H falls back and connects up C again, whereupon H reoperates to switch through to the wipers. The 11th position is wired back to line relay A over which a busy signal is sent. If, however, the selector is set to a level on which springs NP are operated, H fails to hold after the relapse of C, so that relay DA energizes, locks and switches over the wipers, while magnet ZM energizes and restores the wipers to normal. Dialling relay C reoperates in readiness for a second digit. Any further operation of springs NP is ineffective since DA provides an alternative circuit for Hand RM. Upon release, H and C fall back and the rotary magnet RM advances the wipers clear of the banks, whereupon they drop and return to normal. Specification 391,151 is referred to.
GB9226/37A 1937-03-31 1937-03-31 Improvements in automatic switches for use in telephone or like systems Expired GB493068A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9226/37A GB493068A (en) 1937-03-31 1937-03-31 Improvements in automatic switches for use in telephone or like systems
US198170A US2236808A (en) 1937-03-31 1938-03-26 Automatic switch for use in telephone or like systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9226/37A GB493068A (en) 1937-03-31 1937-03-31 Improvements in automatic switches for use in telephone or like systems

Publications (1)

Publication Number Publication Date
GB493068A true GB493068A (en) 1938-09-30

Family

ID=9867839

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9226/37A Expired GB493068A (en) 1937-03-31 1937-03-31 Improvements in automatic switches for use in telephone or like systems

Country Status (2)

Country Link
US (1) US2236808A (en)
GB (1) GB493068A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB616834A (en) * 1946-06-07 1949-01-27 Automatic Telephone & Elect Improvements in or relating to automatic switches for use in telephone systems
US2588303A (en) * 1947-07-23 1952-03-04 Phillips Petroleum Co Fractionator reflux control method
DE1021898B (en) * 1955-02-02 1958-01-02 Siemens Ag Telecommunication, in particular telephone system, with square dialers designed as number swallowers

Also Published As

Publication number Publication date
US2236808A (en) 1941-04-01

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