GB941225A - Improvements in and relating to a variable load control valve for a rail vehicle braking system - Google Patents

Improvements in and relating to a variable load control valve for a rail vehicle braking system

Info

Publication number
GB941225A
GB941225A GB4352062A GB4352062A GB941225A GB 941225 A GB941225 A GB 941225A GB 4352062 A GB4352062 A GB 4352062A GB 4352062 A GB4352062 A GB 4352062A GB 941225 A GB941225 A GB 941225A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
pressure
valve
brake cylinder
load
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
GB4352062A
Inventor
Charles Frederick Bay Shattock
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
Priority claimed from GB3662260A external-priority patent/GB927001A/en
Application filed by Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB4352062A priority Critical patent/GB941225A/en
Publication of GB941225A publication Critical patent/GB941225A/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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
    • B60T8/1812—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction
    • B60T8/1818—Lever mechanism
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
    • B60T8/1893—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution especially adapted for railway vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)

Abstract

941,225. Fluid-pressure brakes. WESTING- HOUSE BRAKE & SIGNAL CO. Ltd. Jan. 3, 1962, No. 43520/62. Divided out of 941,224. Heading F2F. In a variable load control valve for a railway braking system which varies the brake cylinder pressure in response to changes in the load carried by the vehicle, a weigh beam 32 is mounted for longitudinal movement between positions E (empty) and L (load), spaced abutment members 55, 56 engage the weigh beam for varying the brake cylinder pressure upon movement of the weigh beam between the positions E and L and guide means, formed by a pivotally mounted link 58 or 59, is associated with each abutment member for preventing lateral stress thereon. The control valve is provided with two air inlet connections 44 and 46 leading from a triple valve or EP unit and from a main reservoir respectively. An air outlet connection 47 is connected to the brake cylinder relay valve. The air passes from the connection 46 to the outlet 47 through an inlet valve 48 and can exhaust through an exhaust valve 49. A diaphragm 50 extends across the upper portion of the valve body 43 and is subject to the required output pressure to the brake cylinder relay valve. A diaphragm 42 extends across the lower portion of the valve body 43 and air from the triple valve or EP unit acts on the underside of the diaphragm 42. In operation, when a pin 18 is in the position E, the weigh beam 32 is in the position shown in the drawing and the ratio is such that a pressure of 50 1b. per square inch acting on the underside of the diaphragm 42 produces a load on the diaphragm abutment 56, corresponding to the pressure acting on the diaphragm 42 multiplied by the effective area of the diaphragm 42 multiplied by the leverage ratio produced by the positions of the abutments 55, 56 and the pin 31. This load is balanced by a pressure above the diaphragm 50 which is equal to the required brake cylinder pressure, for example 50 1b. per square inch. Any intermediate pressure under the diaphragm 42 produces a proportional output pressure above the diaphragm 50. Specification 927,001 is referred to.
GB4352062A 1960-10-25 1962-01-03 Improvements in and relating to a variable load control valve for a rail vehicle braking system Expired GB941225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4352062A GB941225A (en) 1960-10-25 1962-01-03 Improvements in and relating to a variable load control valve for a rail vehicle braking system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3662260A GB927001A (en) 1960-10-25 1960-10-25 Improvements in and relating to a rail vehicle braking system
GB4352062A GB941225A (en) 1960-10-25 1962-01-03 Improvements in and relating to a variable load control valve for a rail vehicle braking system

Publications (1)

Publication Number Publication Date
GB941225A true GB941225A (en) 1963-11-06

Family

ID=26263177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4352062A Expired GB941225A (en) 1960-10-25 1962-01-03 Improvements in and relating to a variable load control valve for a rail vehicle braking system

Country Status (1)

Country Link
GB (1) GB941225A (en)

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