GB166966A - Improvements in automatic train control systems - Google Patents

Improvements in automatic train control systems

Info

Publication number
GB166966A
GB166966A GB1136120A GB1136120A GB166966A GB 166966 A GB166966 A GB 166966A GB 1136120 A GB1136120 A GB 1136120A GB 1136120 A GB1136120 A GB 1136120A GB 166966 A GB166966 A GB 166966A
Authority
GB
United Kingdom
Prior art keywords
valve
magnet
pressure
port
cylinder
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
GB1136120A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1136120A priority Critical patent/GB166966A/en
Publication of GB166966A publication Critical patent/GB166966A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
    • B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
    • B61L3/121—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using magnetic induction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)

Abstract

166,966. Howe, W. K. April 23, 1920. Pilot valve apparatus.- Relates to valves actuated in part by fluid pressure control, the control of an auxiliary valve actuated by fluid pressure and by electricity. Fig. 1 shows one form of train apparatus in which, when the magnet 17<1> is de-energized, air pressure passes from the reservoir by way of pipe 9 and valve EPV to pipe 8 and the cylinder 4, and thence by way of the restricted passage 24 to the cylinder 26. The piston 5 is urged to the left and tends to open the driver's valve. If the driver holds the valve closed, the pressure in cylinder 26 after a time rises sufficiently to close the contact 30 and enables the magnet 17<2> to be energized by closing the contact K. If the driver causes or allows a service application of the brakes, a second restricted passage 32 is opened and the valve may be reset after a shorter interval. Fig. 6 shows a construction of the valve EPV. The port 11 to the pressure pipe 9 is normally closed by the spring 22, and the magnet 17 and the pipe 8 is open to atmosphere at the port 19. On de-energization of the magnet, the pressure at the port 11 opens the valve and acts on the piston 12 to keep open the port 14 until such time as the pressure is so reduced that the magnet can overcome its action and re-close the valve. Such a valve may be used in conjunction with an auxiliary reservoir fed through a small orifice which feeds the reservoir at a less rate than air escapes from the outlets on the cylinder 4 which may have an additional hand-controlled vent which the driver may open to allow earlier re-setting by the magnet, which in this case has one coil only, which is momentarily de-energized.
GB1136120A 1920-04-23 1920-04-23 Improvements in automatic train control systems Expired GB166966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1136120A GB166966A (en) 1920-04-23 1920-04-23 Improvements in automatic train control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1136120A GB166966A (en) 1920-04-23 1920-04-23 Improvements in automatic train control systems

Publications (1)

Publication Number Publication Date
GB166966A true GB166966A (en) 1921-07-25

Family

ID=9984821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1136120A Expired GB166966A (en) 1920-04-23 1920-04-23 Improvements in automatic train control systems

Country Status (1)

Country Link
GB (1) GB166966A (en)

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