Improvements in Steam-boiler Furnaces.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Steam-boiler Furnaces.
I MICHEAL EDWARD HERBERT of 801, to 811, South Seventh Street, Saint Joseph,
Buchanan County, Missouri, United States of America, Manufacturer of Steam
Boilers, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
The object of my invention is to provide an improved steam boiler furnace which
shall give great heating or steam capacity and shall secure an economy in the use of
the fuel by burning the smoke and gases arising from the coal; and to this end it
consists in the peculiar construction and arrangement of parts which I will now
proceed to describe with reference to the accompanying drawings, in which figure 1
is a perspective view of the furnace with the boiler set in place in the casing, the
front wall and one of the side walls and also a part of the boiler being broken away to
shew the construction of the parts. Figure 2 is a vertical transverse section shewing
a modification of my invention.
In figure 1, the form of boiler used is of the inverted U-shaped pattern, forming a
water leg on each side extending the full length of the boiler and constructed of an
inner shell F and an outer shell G connected together by stay bolts g
The two legs
of the boiler are connected together and braced by water tubes A and C. This boiler
is set within a brick casing. The lower parts of the side walls of the brick casing
are made double with a space between the two parts of the side wall, and the outer
side walls extend up alongside the water legs of the boiler and are covered with
plates N which form a closed chamber V all around the boiler. The front part of the
chamber V is partially separated from the rear part by water pipes tapped into the
water legs of the boiler (or by a wall) and this front chamber forms a fuel magazine
on each side of the boiler which is charged with fuel through hinged doors O in the
top plate N N. The inner brick side wall is a little lower at its front end so as
to leave a space beneath the water leg on each side, communicating on one side
with the fuel magazine and on the other side with the fire box of the furnace on a level
with the grate bars a a. In the bottom of each fuel magazine and extending under
the outer leg of the boiler are a series of three fluted metal feed rollers S arranged
side by side and having chain pulleys at their ends connected by a chain belt T. A
crank handle U on one of these feed rollers causes an equal rotary motion to be
transmitted through the chain to all of the rollers which serve to feed the fuel under
the water legs on each side of the boiler and on to the grate. R is a water drum
forming a bridge wall at the back of the fire box and communicating at its ends with
the two water legs of the boiler which it connects and braces. When the fire is
started, the fuel is fed to the grate in regulated quantity from the bottoms of the
magazine chambers and a uniform bed of live coal is thus maintained which supplies
a very intense heat to both sides of each water leg and the drum R, giving great
steaming capacity. At the same time that the solid fuel is being consumed on the
grate bars, the gases and smoke rising from the lower part of the fuel magazine
(which receives air at W) pass up and over the water tubes X heating them and
passing to the rear between the brick casing and outside of the water legs, as
shown by arrows P, serving also to heat the outside of the boiler shell, then,
descending at the rear of the boiler and passing along the front middle chamber to
the ash pit in front and then rising through the grate bars, are burned by the bed of
live coals, so as to fully utilise all the combustible parts of the fuel and perfectly
consume the smoke. At the bottom of each water leg, there is a pipe connection Z
for blowing off the boiler.
In figure 2, the two pendent water legs are applied to a cylindrical boiler and are
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page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what. manner the same is to be performed, 1 declare that what I
claim is :-
:
1. The combination, with a steam boiler having water legs upon each side, of an
outer casing having a fuel magazine at its front ends communicating with the fire box
under the water legs and feed devices located at the bottoms of the fuel magazines to
feed the fuel to the grate while the gaseous products are separately carried off and
consumed, as described.
2. The combination, with a steam boiler having a central fire box and water legs on
each side, of fuel magazines arranged upon the outer side of each water leg and
opening at the bottom, into the fire box and feed rollers arranged at the bottom of
the fuel magazines, substantially as and for the purposes described.
3. The combination, with a steam boiler having water legs upon each side with
tubes X, of an outer casing having fuel magazines at the front ends, feed rollers S
located at the bottom of the fuel magazines and geared together to feed into the
fire box and a top plate N with charging doors 0, substantially as, and for the
purpose, described.
دعم
1
1600
M. E. HERBERT.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.