The boiler maker's tools now comprise the steam, compressed air,
hydraulic or other mechanical riveter, rolls for the bending of plates
while cold into the needed cylindrical or conical forms, multiple
drills for the drilling of rivet holes, planing machines to plane the
edges of the plates, ingenious apparatus for flanging them, thereby
dispensing with one row of rivets out of two, and roller expanders for
expanding the tubes in locomotive and in marine boilers; while the
punching press, where still used, is improved so as to make the holes
for seams of rivets in a perfect line, and with absolute accuracy of
pitch.
With respect to the smith's shop, all large pieces of work are now
manipulated under heavy Nasmyth or other steam hammers; while smaller
pieces of work are commonly prepared either in forging machines or
under rapidly moving hammers, and when needed in sufficient numbers
are made in dies. And applicable to all the three industries of the
fitting shop, the boiler shop, and the smith's shop, and also to that
other industry carried on in the foundry, are the traveling and swing
cranes, commonly worked by shafting, or by quick moving ropes for the
travelers, and by hydraulic power or by steam engines for the swing
cranes. It may safely be said, that without the aid of these
implements, it would be impossible to handle the weights that are met
with in machinery of the present day.
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