IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by. William Edward Newton at the
Office of the Commissioners of Patents, with his Petition, on the
30th October 1866.-A communication from abroad by Robert Bailey,
of Idaho City, in the Territory of Idaho, United States of America.
I, WILLIAM EDWARD NEWTON, of the Office for Patents, 66, Chancery Lane,
in the County of Middlesex; Civil Engineer, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS,"
to be as follows:-
This Invention relates to improvements in steam boilers, and consists in
constructing them in sections so that they may be readily opened and taken
apart for repairing or cleaning the fire flues and spaces in the different
sectional parts, which fire flues and spaces are so divided and arranged as to
present an immense amount of fire surface in proportion to the size and
weight of the boiler compared with ordinary boilers. The boiler as a whole
is very compact and strong, and although it may be advantageously used
anywhere, it is particularly adapted to mining purposes in distant interior
localities where transportation is difficult and expensive, on account of its
weight being comparatively small and the great portability it possesses by
division into sections: The boiler has two principal parts divided vertically,
each principal part being also divided into two distinct sections. The fire

page_text: grate extends under both principal sections, and between them is a vertical
fire space over the fire chamber, which leads directly into the exit flue at the
top of the boiler. The central sub-divisions or sections on each side of the
fire space have running through them a series of horizontal or nearly
horizontal tubular fire flues. The outside jackets or sections may be modified
in their construction and modes of arranging the flues and fire spaces; for
instance, one of these sections may be built with tubular fire flues running
through water compartments, and the other with a flat fire space or flue
between two flat water compartments, either of which methods of construction
may be adopted in the sectional boiler. The tubular fire flues pass transversely
through the water compartments of one section, between which is also a fire
space, and in the other section the fire flue is between the water compartments;
and between both the external sections and the internal sections are other
fire spaces. The two outer sections or jackets are pivoted to the central
sections through trunnions at their lower ends by rods which pass through
the shells on each side of the boiler, so as to allow the jacket sections to be
opened outward readily for the purpose of repairing and cleaning the scale
and ashes from the fire flues and spaces when necessary. The central sections
may be made with water compartments extending outside of the jacket
sections and enclosing fire spaces between them. The grate bars are made
hollow, with their ends opening into the central sections, so that the water in
the boiler shall circulate freely through them. At the upper end of the fire
space is a damper opening into the exit flue; this damper may be opened
for direct draft when the fire is kindled, but for making steam it is closed,
when the products of combustion will pass indirectly to the exit flue through
all the fire flues and spaces, and thus act upon a very large extent of fire
surface and generate steam very rapidly with a small consumption of fuel.