Model engine construction, with practical instructions to artificers and amateurs (1894)
Alexander, John Henry. [from old catalog] · London, New York, Whittaker · leaf 75
a Salters spring-balance,which is generally graduated. The balance can be 56 MODEL ENGINE CONSTRUCTION. made with a small spring acting against a piston,moving up and down in a small tube, closed at bothends. The piston-rod passes vertically through ahole drilled in the end of the safety-valve… … Fig. 13. tightened up, as required to suit the steam pressure.The spring-balance at its lower end is pivoted toa bracket, which is soldered or screwed into theboiler. A direct-acting spring-valve (see Fig. 13) is a goodone for small models. This can be easily made fromthe instructions given, or it…
Steam-engines · Machinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher04nati-65-31.webp)
