Types
Several different types of buffer stop have been developed. They differ depending on the type of coupler used and on the intended application.
- Buffer stops with anticlimbers. These are particularly important for passenger railway applications, because the anticlimbers prevent telescoping of the railroad cars during a head-on impact.
- Buffer stops for a knuckle coupler or an SA3 coupler (centrally positioned between the two rails)
- Buffer stops with traditional "buffers" on either side
- Hydraulic buffer stops
- Friction buffer stops (bolted down to the rail)
If there is extra room behind the bumper block, there is usually a sand or ballast drag that is designed to further retard a runaway train. One such accident occurred when a Northern Line train powered past the bumper block at Moorgate station in 1975 on the London Underground system.
Read more about this topic: Buffer Stop
Famous quotes containing the word types:
“If there is nothing new on the earth, still the traveler always has a resource in the skies. They are constantly turning a new page to view. The wind sets the types on this blue ground, and the inquiring may always read a new truth there.”
—Henry David Thoreau (1817–1862)
“Our major universities are now stuck with an army of pedestrian, toadying careerists, Fifties types who wave around Sixties banners to conceal their record of ruthless, beaverlike tunneling to the top.”
—Camille Paglia (b. 1947)
“The bourgeoisie loves so-called “positive” types and novels with happy endings since they lull one into thinking that it is fine to simultaneously acquire capital and maintain one’s innocence, to be a beast and still be happy.”
—Anton Pavlovich Chekhov (1860–1904)