The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 340
f this break is rapid, it is by no means so sudden as to entailany evil upon that account. • In illustration of the power of such a system of breaks, let us sup-pose that each of the breaks c presents a surface of only three timesthe area of the bearing surface of the wheel upon therail, and… … tation of the wheels would be effectually prevented. When it isfurther seen that this small force is exerted through the medium of ascrew, acting upon a system of levers most advantageously disposedfor the multiplication of power, it will be evident that the applicationof a few pounds to the break…
Architecture · Civil engineering · Science
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