GB940879A - Improvements in accelerator valves for train braking systems - Google Patents
Improvements in accelerator valves for train braking systemsInfo
- Publication number
- GB940879A GB940879A GB289061A GB289061A GB940879A GB 940879 A GB940879 A GB 940879A GB 289061 A GB289061 A GB 289061A GB 289061 A GB289061 A GB 289061A GB 940879 A GB940879 A GB 940879A
- Authority
- GB
- United Kingdom
- Prior art keywords
- choke
- seat
- valve element
- engagement
- valve
- 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
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
- B60T13/24—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 the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/465—Vacuum systems for railway vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
940,879. Accelerator valves. GRESHAM & CRAVEN Ltd. Dec. 22, 1961 [Jan. 25, 1961], No. 2890/61. Heading F2F. An accelerator valve for train braking systems comprises first and second chambers 10, 15 betwen which is a first valve seat 19 normally closed by a valve element 17 which is resiliently loaded by a spring 20 into engagement therewith and is carried by a movable member 13. The valve element has a first choke 27 extending therethrough so as to restrict communication between the chamber 15 and a third chamber 16 and is movable against the spring 20 into engagement with a second valve seat 25. The arrangement is such that when the valve element moves into engagement with the seat 25 communication between chambers 10 and 16 is provided only through the first choke 27 and a second choke 28 which is more restricted than the choke 27. In emergency operation an increase in the pressure of vacuum train pipe 11 causes the valve element to move into engagement with seat 25 so as to connect the train pipe to atmosphere via vent 21. After the vacuum in chamber 16 has been destroyed at a predetermined rate through the choke 28 the valve element 17 re-seats on seat 19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB289061A GB940879A (en) | 1961-01-25 | 1961-01-25 | Improvements in accelerator valves for train braking systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB289061A GB940879A (en) | 1961-01-25 | 1961-01-25 | Improvements in accelerator valves for train braking systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB940879A true GB940879A (en) | 1963-11-06 |
Family
ID=9747947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB289061A Expired GB940879A (en) | 1961-01-25 | 1961-01-25 | Improvements in accelerator valves for train braking systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB940879A (en) |
-
1961
- 1961-01-25 GB GB289061A patent/GB940879A/en not_active Expired
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