When the train pipe pressure falls below the limit, ring 10 will force the . diaphragm to. its seat, thus cutting off the supply of air to piston 4. it air above piston 4 will then escape through the small vent hole in the .body of governor, d allow steamanbsp;...
|Title||:||The Science of Railways: The air brake. 1912|
|Author||:||Marshall Monroe Kirkman|