GB113616A - Improvements in Electric Relays particularly for Railway Traffic Controlling Apparatus. - Google Patents

Improvements in Electric Relays particularly for Railway Traffic Controlling Apparatus.

Info

Publication number
GB113616A
GB113616A GB2908/18A GB290818A GB113616A GB 113616 A GB113616 A GB 113616A GB 2908/18 A GB2908/18 A GB 2908/18A GB 290818 A GB290818 A GB 290818A GB 113616 A GB113616 A GB 113616A
Authority
GB
United Kingdom
Prior art keywords
current
relay
signalling
section
signal
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
GB2908/18A
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.)
MCKENZIE HOLLAND AND WESTINGHO
Original Assignee
MCKENZIE HOLLAND AND WESTINGHO
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 MCKENZIE HOLLAND AND WESTINGHO filed Critical MCKENZIE HOLLAND AND WESTINGHO
Publication of GB113616A publication Critical patent/GB113616A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/18—Railway track circuits
    • B61L1/181—Details
    • B61L1/187—Use of alternating current

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

113,616. McKenzie, Holland, & Westinghouse Power Signal Co., (Assignees of Zierdt, C. H.). Feb. 20,1917, [Convention date]. Electrical systems, automatic.-Relays are designed to operate with current of signalling frequency and to remain unaffected by propulsion current of lower frequency. The insulated section A of track is supplied through a transformer T with signalling current of higher frequency than that of the propulsion current which returns through the rails. When no train is on the section, the relay is energized by the higher frequency signalling current and is unaffected by any propulsion current derived from the rails. The relay closes a local circuit which moves the signal to " clear." When a train enters the section, the relay coils are short-circuited and the signal returns to " danger." The construction of the relay is described in detail.
GB2908/18A 1917-02-20 1918-02-19 Improvements in Electric Relays particularly for Railway Traffic Controlling Apparatus. Expired GB113616A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US113616XA 1917-02-20 1917-02-20

Publications (1)

Publication Number Publication Date
GB113616A true GB113616A (en) 1918-08-01

Family

ID=32296306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2908/18A Expired GB113616A (en) 1917-02-20 1918-02-19 Improvements in Electric Relays particularly for Railway Traffic Controlling Apparatus.

Country Status (1)

Country Link
GB (1) GB113616A (en)

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