The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 409
boiler gets lower than a certain point,and the pressure of steam in the boiler is not sufficient to open the valve, thenut upon the end of the rod, which is attached to the float, which floatlhasdescended as the water evaporated, comes in contact with the end of thelever, and thereby raises the… … The second part of the invention will be clearly understood by the an-nexed diagram and following description ; that is to say, a a shows a sectionof portion of a boiler, b; the safety valve attached by a rod to the lever d, ande the weights; e is a cylinder attached to the top of the boiler,…
Architecture · Civil engineering · Science
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