Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives (1916)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co., pub. for Sears, Roebuck & co. · leaf 55
the two most generally used are the Prosser, Figs 17 and 18, and the Dudgeon, Fig 19. The Prosser tube expander is an expanding plugmade up of eight or more sectors, 1, 2, 3, 4, 5, 6, 7, S,held together by an open steel ring or spring clasp C(see Fig. iS). The sector-shaped pieces have their… … Figure 16 THE BOILER 55 the mandrel driven in, the sectors will be slightlyseparated and the tendency will be to. expand thetubes. The outside conformation of the sectors com-posing the plug is such that, [when the tube is ex-panded, it not only completely fills the hole in the
Locomotives
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