Improvements in Hot Water Furnaces.
Year: 1898

page_text: Date of Application, 9th May, 1898-Accepted, 6th Aug.,
1898
COMPLETE SPECIFICATION.
Improvements in Hot Water Furnaces.
I, THOMAS JOSEPH BEST, of No. 637, Craig Street, in the City of Montreal, in the
District of Montreal, and Province of Quebec, Dominion of Canada, Superinten-
dent, 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:
1
My invention has for its object to provide a furnace that will give better results
than have been obtainable heretofore from a furnace of like capacity, and one that
will be simpler and less costly to construct.
To these ends, the invention may be said, briefly, to consist of a hot water furnace
composed of an ash pit section, a fire chamber section, a top section or dome and
an intermediate section, the intermediate section having a fire flue extending at an
angle from the rear to the front thereof and opening at the rear downwardly into
the fire chamber and at the front upwardly into the dome, the dome preferably
having a depression in the top thereof and the said sections being, preferably,
connected together by an improved connection.
For full comprehension, however, of the foregoing, reference must be had to
the annexed drawings forming a part of this specification in which like symbols
indicate the same parts.
Figure is a front elevation of a furnace constructed according to my invention;
Figure 2 a transverse vertical sectional view of the water sections thereof taken
on line 2-2 Figure 1;
Figure 3 a plan view of the fire pot section;
Figure 4 a plan view of the intermediate section; and
Figure 5 a plan view of the underside of the top section or dome.
The fire-pot section shown in detail plan view in Figure 3, consists of an inner
casing 40, and an outer casing 41, provided with a rear and two side lateral exten-
sions 42 and 43, 43, respectively, and connected to said inner casing by means of
upper and lower diaphragms 44 and 45 respectively, the lower diaphragm being intact
while the upper diaphragm has openings 46, to register with the passages formed
by said lateral extensions 42 and 43, 43, while the return pipe 48, of the heating
system takes into an opening in the rear of the outer casing near the bottom
thereof and communicates with the jacket formed by said outer and inner casings.
The intermediate section, i.e. the section next above and resting upon said fire-
pot-section, consists also of inner and outer casings 50 and 51 respectively, con-
nected together at their top and bottom edges, by the respective diaphragms 52
a rear and two side lateral extensions 54 and
and 53, and the outer casing having
55, 55 respectively, corresponding and registering with the extensions 42 and 43,
43 of the fire-pot section.
The lower diaphragm 53 extends completely across the lower end of said inter-
mediate section except for a transverse opening 56, extending completely across
from side to side of the inner casing 50, at the rear side but inside thereof, and
openings 57 adapted to register with the passages formed by the side exten-

page_text: sions 55, 55 the remainder of the diaphragm being intact and blinding the passage
formed by the rear extension 54.
The upper diaphragm 52 also extends completely across its end of this inter-
mediate section except for an opening 58, corresponding to the opening 56, but at
the front and also inside of said inner casing, and an opening 59, which registers
with the said passage formed by the rear extension 54, the remainder of this
diaphragm being intact and blinding the passages formed by the side extensions 55.
Intermediate of these upper and lower diaphragms 52 and 53, 53 are located a
pair of diagonal diaphragms 60 and 61 connecting the edges of said upper forward
opening 58 to the edges of the lower rear opening 56, and the intervening portions
of the inner casing between the diagonal diaphragm 60 and the upper diaphragm 52,
and the diagonal diaphragm 61 and the lower diaphragm 53, are cut away, thus
extending the jacket above and beneath the passage formed by said diagonal
diaphragms.
The top section or dome consists also of inner and outer casings 70 and 71
respectively, the outer casing having at its lower end a rear and two side lateral
extensions 72 and 73, 73 respectively, corresponding to and registering with the
upper ends of the passages formed by the extension 54 and 55, 55 of the inter-
mediate section.
The roof of the inner casing being indented, as at 74, to serve the double pur-
pose of increasing the area of the jacket and providing a baffler adapted to extend
transversely from side to side of said inner casing, while a diaphragm 75 connects
the lower edges of the inner and outer jackets except for an opening 76, corres-
ponding in area to, and registering with the upper end of the passage 59, the
remainder of this diaphragm being intact and blinding the passages 57, 57.
The fire-pot is provided with a fire door 80, and the intermediate and top sections
with doors 81 and 82 respectively, the latter doors being to allow of access to the
combustion passages, for cleansing purposes, while a communication is effected
with the chimney by a tubular flue 83, and the flow pipe is connected, preferably,
as shown at 84, to the top of the dome or top section.
My improved manner of connecting the sections together consists of independent
chambers 90 formed preferably by vertical tubular extensions 91, cast in one with
the intermediate section, and having their ends closed and provided with screw
threaded perforations 92, while the top section or dome and the fire pot section
have cast in one therewith a serie, of perforated lugs 95 through which screw-
bolts take into said screw threaded perforations 92, thus effectively securing the
sections together and at the same time providing bolt spaces adapted to allow of
expansion and prevent any leakage of joints.
The circuits through my improved furnace are, as indicated, the products of
combustion rising from the fire passing up through the diagonal passage A to the
dome and thence to the chimney, while the water circulation is from the jacket of
the fire pot through passages 57 to the jacket of the intermediate section and thence
through passage 59 to the jackets of the dome or top section, and out through the
flow connection 84, and, after traversing the coils and piping, not shown, of the
heating system, returns again to the jacket of the fire pot section, through return
connection 48.
An ash pit of any approved construction may be used.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
1. A hot water furnace composed of an ash pit section, a fire chamber section,
a dome and an intermediate section, said intermediate section having a fire flue
extending at an angle from rear to front and opening at the rear downward into
the fire chamber and at the front upwardly into the dome, for the purpose set forth.
2. A hot water furnace composed of an ash pit section, a fire chamber section,
a dome and an intermediate section having a fire flue extending at an angle from

page_text: rear to front and opening at the rear downward into the fire chamber and at the
front upwardly into the dome, and the dome having a depression in the top thereof,
for the purpose set forth.
3. A furnace comprising an ash pit section, a fire chamber section, a top section
or dome and an intermediate section; the fire chamber section being enclosed by
a water jacket having a rear and a pair of side lateral extensions forming vertical
passages, and a return pipe connection at its lower end; the intermediate section
comprising a diagonal passage extending from the lower rear end thereof to the
forward top end thereof, a water jacket enclosing said passage and having a rear
and a pair of side extensions forming vertical passages corresponding to and regi-
stering with the above mentioned vertical passages, the lower end of the rear
passage of this intermediate section being blinded; the top section or dome located
above and resting upon said intermediate section and comprising a water jacket
having a rear and a pair of side lateral extensions forming vertical passages cor-
responding to and registering with the above mentioned vertical passages, the
lower ends of the side passages of this top section or dome being blinded, a flow
pipe connection at the upper end of this jacket, and a chimney connection with the
top of the interior of said top section or dome, substantially as set forth.
4. A furnace comprising an ash pit section; a fire chamber section, a top section
or dome and an intermediate section, the fire chamber section being enclosed by
a water jacket having a rear and a pair of side lateral extensions forming vertical
passages, and a return pipe connection at its lower end; an intermediate section
located above and resting upon said fire pot section and comprising a diagonal
passage extending from the lower rear end thereof to the forward top end thereof, a
water jacket enclosing said passage and having a rear and a pair of side exten-
sions forming vertical passages corresponding to and registering with the above
mentioned vertical passages, the lower end of the rear passage of this intermediate
section being blinded; the top section or dome comprising a water jacket having a
rear and a pair of side lateral extensions forming vertical passages corresponding
to and registering with the above mentioned vertical passages, the lower ends of
the side passages of this top section or dome being blinded, a flow pipe connection
at the upper end of this jacket, a downward extension from the interior of the top
of said dome and extending transversely thereof, and a chimney connection with
the top of the interior of said top section or dome, substantially as set forth.
5. A furnace comprising a series of independent sections supported one upon
the other, the intermediate section having a series of lateral chambers extending
the full height of said section and being formed at their upper and lower ends
with screw threaded perforations, and the sections located next above and below
said intermediate section being formed with laterally projecting perforated lugs
adapted to overlap said chambers and be connected thereto by screw bolts taking
therethrough and into said screw threaded perforation, for the purpose set forth.
6. A furnace comprising an ash pit section, a fire chamber section, a top section
or dome and an intermediate section, the fire chamber section being enclosed by
a water jacket having a rear and a pair of side lateral extensions forming vertical
passages, and a return pipe connection at its lower end; the intermediate section
comprising a diagonal passage extending from the lower rear end thereof, to the
forward top end thereof, and a water jacket enclosing said passage and having a
rear and a pair of side extensions forming vertical passages corresponding to and
registering with the above mentioned vertical passages, and the lower end of the
rear passage of this intermediate section being blinded; the top section or dome.
comprising a water jacket having a 'rear and a pair of side lateral extensions form-
ing vertical passages corresponding to and registering with the above mentioned
vertical passages, the lower end of the side passages of this top section or dome being
blinded, a flow pipe connection at the upper end of this jacket, and a chimney
connection with the top of the interior of said top section or dome, the intermediate
section also having a series of lateral chambers extending the full height of said
section and being formed at their upper and lower ends with screw threaded

page_text: perforations, and the top and fire pot sections being formed with laterally projecting
perforated lugs adapted to overlap said chambers and be connected thereto by screw
bolts taking therethrough and into said screw-threaded perforations substantially
as and for the purpose set forth.
CARPMAEL & Co.,
Agents for the Applicant.