Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 61
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, i, 2, 3, 4, 5, 6, 7, 8,held together by an open steel ring or spring clasp C(see Fig. 18). The sector-shaped pieces have tfieir… … 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 onh^ completely fills the hole in the
Locomotives
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