GB794727A - Improvements relating to electrical timing systems - Google Patents

Improvements relating to electrical timing systems

Info

Publication number
GB794727A
GB794727A GB3655854A GB3655854A GB794727A GB 794727 A GB794727 A GB 794727A GB 3655854 A GB3655854 A GB 3655854A GB 3655854 A GB3655854 A GB 3655854A GB 794727 A GB794727 A GB 794727A
Authority
GB
United Kingdom
Prior art keywords
relay
condenser
closing
switch
time interval
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
GB3655854A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal 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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB3655854A priority Critical patent/GB794727A/en
Publication of GB794727A publication Critical patent/GB794727A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or trains
    • B61L25/021—Measuring and recording of train speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L17/00—Switching systems for classification yards

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

794,727. Indicating train speeds. WESTING- HOUSE BRAKE & SIGNAL CO., Ltd., and DUCKITT, H. Dec. 9,1955 [Dec. 17, 1954], No. 36558/54. Class 105. [Also in Groups XXXV and XXXVIII] In order to check that the speed of a vehicle passing over a section of track is below a predetermined value, the vehicle starts a time interval by closing a switch 9 as it enters the section, the duration of the time interval being compared with a standard value by charging a condenser 19 during that time at a predetermined rate, and allowing it to discharge through a relay winding 16 whereby if the charge exceeds a predetermined value the discharge current is large enough to energize the relay and operate an indicator citcuit. On closing of the switch 9, the relay 10 operates, contact 13 changes over and condenser 19 is charged from a stabilized D.C. supply through rectifier 15. At the end of the time interval, when the vehicle leaves the track section, switch 9 is opened, relay 10 falls and change-over contact 13 completes the discharge circuit for condenser 19 through winding 17 of the relay 16. If the discharge current is sufficiently high, relay 16 is energized, closing a holding circuit via contact 21, and an indicating or control circuit via contact 23.
GB3655854A 1954-12-17 1954-12-17 Improvements relating to electrical timing systems Expired GB794727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3655854A GB794727A (en) 1954-12-17 1954-12-17 Improvements relating to electrical timing systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3655854A GB794727A (en) 1954-12-17 1954-12-17 Improvements relating to electrical timing systems

Publications (1)

Publication Number Publication Date
GB794727A true GB794727A (en) 1958-05-07

Family

ID=10389236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3655854A Expired GB794727A (en) 1954-12-17 1954-12-17 Improvements relating to electrical timing systems

Country Status (1)

Country Link
GB (1) GB794727A (en)

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