Balanced Slide Valve
The balanced slide valve was invented by the Scottish engineer Alexander Allan. It was not much used in the UK but, at one time, had great popularity in the USA. It gave some of the advantages of a piston valve to a slide valve by relieving the pressure on the back of the valve, thus reducing friction and wear.
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Famous quotes containing the words balanced and/or slide:
“Much of the ill-tempered railing against women that has characterized the popular writing of the last two years is a half-hearted attempt to find a way back to a more balanced relationship between our biological selves and the world we have built. So women are scolded both for being mothers and for not being mothers, for wanting to eat their cake and have it too, and for not wanting to eat their cake and have it too.”
—Margaret Mead (1901–1978)
“George Shears ... was hanged in a barn near the store. The rope was thrown over a beam, and he was asked to walk up a ladder to save the trouble of preparing a drop for him. “Gentlemen,” he said, “I am not used to this business. Shall I jump off or slide off?” He was told to jump.”
—For the State of Montana, U.S. public relief program (1935-1943)