GB908470A - Improvements relating to brake controlling devices for railway braking apparatus - Google Patents

Improvements relating to brake controlling devices for railway braking apparatus

Info

Publication number
GB908470A
GB908470A GB1058658A GB1058658A GB908470A GB 908470 A GB908470 A GB 908470A GB 1058658 A GB1058658 A GB 1058658A GB 1058658 A GB1058658 A GB 1058658A GB 908470 A GB908470 A GB 908470A
Authority
GB
United Kingdom
Prior art keywords
contact
pressure
battery
mercury
retardation
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
GB1058658A
Inventor
Arthur William Simmons
Michael Theodore Dyott Darwall
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 GB1058658A priority Critical patent/GB908470A/en
Publication of GB908470A publication Critical patent/GB908470A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/665—Electrical control in fluid-pressure brake systems the systems being specially adapted for transferring two or more command signals, e.g. railway systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

908,470. Electropneumatic braking apparatus. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. April 2, 1959 [April 2, 1958], No. 10586/58. Addition to 779,923. Class 103 (1). A brake-controlling device for electropneumatic railway braking apparatus, includes a mercury tube retardation controller T, M having a contact CS constantly immersed in mercury and connected to battery B, a blowdown contact CB and contacts CA, CH connected to relays RA, RH via drum contacts DC, the relays being effective to connect application and holding wires WA, WH to battery B. The device is shown in Fig. 1, in the release position with relays RA, RH de-energized and contact CB is positioned to correspond to a predetermined high rate of retardation with the tube untilted. A circuit between wire WH and battery B includes normally closed contacts of relay RB and a pressure switch PS held open by normal brake pipe pressure. When brake application is initiated pneumatically and independantly of the driver, pressure builds up in the brake cylinder via triple valves, loss of pressure in the brake pipe closes switch PS to energize wire WH to close the holding valve to prevent pressure release via the blow down valve. Should retardation exceed a predetermined rate, the mercury engages contact CB to energize relay RB to disconnect wire WH from battery B and allow the holding valve to open and dissipate pressure until retardation falls below the predetermined rate. In Fig. 2 of the Provisional Specification an additional contact CHM is included below contact CB and switch PS is omitted. As soon as a small retardation is produced the mercury engages CHM to energize relay RH to connect wire WH to the battery and so close the holding valve, contact CB being operative as before. The quantity of mercury need not be so accurately measured in apparatus of Fig. 3 of the Provisional Specification (not shown), since contact CB is arranged between contacts CS and CH and relay RB operates in the reverse manner. A pressure switch PS may be included in the apparatus of Figs. 2 and 3 (not shown), and the drum contactor DC may be replaced by a pressure switch. Specification 779,923 is referred to.
GB1058658A 1958-04-02 1958-04-02 Improvements relating to brake controlling devices for railway braking apparatus Expired GB908470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1058658A GB908470A (en) 1958-04-02 1958-04-02 Improvements relating to brake controlling devices for railway braking apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1058658A GB908470A (en) 1958-04-02 1958-04-02 Improvements relating to brake controlling devices for railway braking apparatus

Publications (1)

Publication Number Publication Date
GB908470A true GB908470A (en) 1962-10-17

Family

ID=9970562

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1058658A Expired GB908470A (en) 1958-04-02 1958-04-02 Improvements relating to brake controlling devices for railway braking apparatus

Country Status (1)

Country Link
GB (1) GB908470A (en)

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