Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 57
a central pin. This central pin is tapering, and when theexpander has been put in position in the tube, tlie segments are set out forcibly againstthe tube by driving in the \nn. In this way the end of the tube is turned over againstthe head, and the tube is expanded so as to fit the tube-hole… … Fig. 2.— ILLUSTRATI^G the Actiux of the Prossek Expander. driven auaiii. In the better boiler shops tubcr-ends are mostly rolled, nowadays, andexcept in special cases where the rolling operation is not convenient, the Prosser ex-pander is used very little. Fig. 2 illustrates what happens when, as…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
