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:
“Our children evaluate themselves based on the opinions we have of them. When we use harsh words, biting comments, and a sarcastic tone of voice, we plant the seeds of self-doubt in their developing minds.... Children who receive a steady diet of these types of messages end up feeling powerless, inadequate, and unimportant. They start to believe that they are bad, and that they can never do enough.”
—Stephanie Martson (20th century)
“Science is intimately integrated with the whole social structure and cultural tradition. They mutually support one other—only in certain types of society can science flourish, and conversely without a continuous and healthy development and application of science such a society cannot function properly.”
—Talcott Parsons (1902–1979)
“... there are two types of happiness and I have chosen that of the murderers. For I am happy. There was a time when I thought I had reached the limit of distress. Beyond that limit, there is a sterile and magnificent happiness.”
—Albert Camus (1913–1960)