GB507959A - Improvements in or relating to electric signalling circuits - Google Patents

Improvements in or relating to electric signalling circuits

Info

Publication number
GB507959A
GB507959A GB840038A GB840038A GB507959A GB 507959 A GB507959 A GB 507959A GB 840038 A GB840038 A GB 840038A GB 840038 A GB840038 A GB 840038A GB 507959 A GB507959 A GB 507959A
Authority
GB
United Kingdom
Prior art keywords
change
switches
relating
over
links
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
GB840038A
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.)
ALEXANDER STEELE
General Electric Co PLC
Original Assignee
ALEXANDER STEELE
General Electric Co PLC
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 ALEXANDER STEELE, General Electric Co PLC filed Critical ALEXANDER STEELE
Priority to GB840038A priority Critical patent/GB507959A/en
Publication of GB507959A publication Critical patent/GB507959A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • H03F1/542—Replacing by standby devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

507,959. Transmission systems. GENERAL ELECTRIC CO., Ltd., WESTELL, E. P. L.-, and STEELE, A. March 18, 1938, No. 8400. [Class 40 (iv)] A spare piece of apparatus S, such as a repeater, can be substituted for any one of a number of similar pieces of apparatus E by a pair of change-over switches P, Q and a number of make-and-break connecting devices, preferably U-links, K, L, u, v, w, x. When the change is to be made, the element to be replaced is connected by its switches u, v, w, x, to bus-bar systems 2, 1, 3, 4, the change-over switches are operated and finally the switches K, L are opened. Preferably the lower change-over contacts are then bridged by U-links.
GB840038A 1938-03-18 1938-03-18 Improvements in or relating to electric signalling circuits Expired GB507959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB840038A GB507959A (en) 1938-03-18 1938-03-18 Improvements in or relating to electric signalling circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB840038A GB507959A (en) 1938-03-18 1938-03-18 Improvements in or relating to electric signalling circuits

Publications (1)

Publication Number Publication Date
GB507959A true GB507959A (en) 1939-06-23

Family

ID=9851810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB840038A Expired GB507959A (en) 1938-03-18 1938-03-18 Improvements in or relating to electric signalling circuits

Country Status (1)

Country Link
GB (1) GB507959A (en)

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