GB118513A - Improvements relating to Railway Signalling. - Google Patents

Improvements relating to Railway Signalling.

Info

Publication number
GB118513A
GB118513A GB1626317A GB1626317A GB118513A GB 118513 A GB118513 A GB 118513A GB 1626317 A GB1626317 A GB 1626317A GB 1626317 A GB1626317 A GB 1626317A GB 118513 A GB118513 A GB 118513A
Authority
GB
United Kingdom
Prior art keywords
current
track
inductance
track rails
condenser
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
GB1626317A
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 & Westinghous
Original Assignee
Mckenzie Holland & Westinghous
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 & Westinghous filed Critical Mckenzie Holland & Westinghous
Priority to GB1626317A priority Critical patent/GB118513A/en
Publication of GB118513A publication Critical patent/GB118513A/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

118,513. McKenzie, Holland, & Westinghouse Power Signal Co., (Union Switch & Signal Co.). Nov. 7, 1917. Electrical systems, automatic. - Signalling-current is supplied to the track rails and track relays through a condenser and an inductance in series, the inductance having an iron core which is magnetically saturated by t h e normal current in the track rails. The condenser K may be arranged directly in the supply circuit or in the secondary circuit of a transformer M as shown in Fig. 3. The arrangement is such as to provide for a constant current in the track relay although the resistance between the track rails 1, 1<a> varies from time to time, since the impedance of the inductance coil I decreases as the current through it increases.
GB1626317A 1917-11-07 1917-11-07 Improvements relating to Railway Signalling. Expired GB118513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1626317A GB118513A (en) 1917-11-07 1917-11-07 Improvements relating to Railway Signalling.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1626317A GB118513A (en) 1917-11-07 1917-11-07 Improvements relating to Railway Signalling.

Publications (1)

Publication Number Publication Date
GB118513A true GB118513A (en) 1918-09-05

Family

ID=32347102

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1626317A Expired GB118513A (en) 1917-11-07 1917-11-07 Improvements relating to Railway Signalling.

Country Status (1)

Country Link
GB (1) GB118513A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463546A (en) * 1944-09-13 1949-03-08 John C Mcdonald Variable output transformer system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463546A (en) * 1944-09-13 1949-03-08 John C Mcdonald Variable output transformer system

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