GB307187A - Improvements in or relating to railway vehicle braking systems - Google Patents
Improvements in or relating to railway vehicle braking systemsInfo
- Publication number
- GB307187A GB307187A GB415628A GB415628A GB307187A GB 307187 A GB307187 A GB 307187A GB 415628 A GB415628 A GB 415628A GB 415628 A GB415628 A GB 415628A GB 307187 A GB307187 A GB 307187A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- brake cylinder
- pipe
- train
- stem
- 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)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
307,187. Glascodine, R. T., McDermid, W. F., and Spencer, A. Feb. 9, 1928. Addition to 285,209. Fluid-pressure.-The valve device for automatic vacuum brakes described in the parent Specification is provided with an opening between the brake cylinder and the valve piston chamber which is controlled by a valve in a similar manner to the opening between the piston chamber and the train pipe so as to ensure a uniform rate of flow of air from the brake cylinder during release as well as to the brake cylinder during application irrespective of the pressure difference as between the train-pipe and the brake cylinder. The train-pipe 9 and brake cylinder pipe 10 communicate with the piston chamber 1 through openings 3, 2, respectively, controlled by shoulders 5, 4 on the piston stem 6<a>. The piston 6 has openings 7 providing a restricted passage for air through the piston. A spring 8 abuts through washers 13 on the heads of pins 12. upon which the piston stem 6<a> can slide. The washers also engage shoulders formed within the piston stem. During application, if the train-pipe pressure together with the weight of the piston is sufficient to overcome the spring 8 and the brake cylinder pressure, the piston moves downwardly to restrict more or less the passage 3 and thus the rate at which the air flows into the brake cylinder. Similarly in releasing the brake if the excess of the brake cylinder pressure over the trainpipe pressure is sufficient to overcome at first the weight of the piston and subsequently also the resistance of the spring 8, the shoulder 4 throttles the flow of air from the brake cylinder to the train-pipe. The upper stem 12 may, like the lower stem, normally contact with the casing, but to render the device more sensitive, in the release action, in view of the fact that the upward movement of the piston is opposed by the weight thereof, the upper stem may as shown be normally spaced from the casing so that the spring is not at first effective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB415628A GB307187A (en) | 1928-02-09 | 1928-02-09 | Improvements in or relating to railway vehicle braking systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB415628A GB307187A (en) | 1928-02-09 | 1928-02-09 | Improvements in or relating to railway vehicle braking systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB307187A true GB307187A (en) | 1929-03-07 |
Family
ID=9771782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB415628A Expired GB307187A (en) | 1928-02-09 | 1928-02-09 | Improvements in or relating to railway vehicle braking systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB307187A (en) |
-
1928
- 1928-02-09 GB GB415628A patent/GB307187A/en not_active Expired
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