Improvements in Water Tube Boilers.
Year: 1898

page_text: Date of Application, 6th Dec., 1898
Complete Specification Left, 7th July, 1899-Accepted, 12th Aug., 1899
PROVISIONAL SIFCIFICATION.
Improvements in Water Tube Boilers.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, in
the County of London, Chartered Patent Agent, do hereby declare the nature of
this invention (as communicated to me from abroad by William Chase Temple,
of Pittsburgh, Pennsylvania, United States of America, Mechanical Engineer)
to be as follows:-
This invention relates to a construction of water tube boiler as I shall describe
referring to the accompanying drawings.
Fig. I, is a vertical section of a steam boiler according to this invention;
Fig. 2, is a horizontal section on the line II-II of Fig. 1. Fig. 3 is a vertical
section of a modified form of boiler and Fig. 4 is a horizontal section on the
line IV-IV of Fig. 3.
Referring to Fig. 1, 2 is the steam and water drum and 3 the mud drum of a
vertical steam boiler enclosed in a brick casing 4. Tubes 5 connect the two
drums 2 and 3. The combustion chamber 6 instead of being, as is usual at the
bottom of the boiler setting, is arranged at its upper part and extends annularly
as indicated at 6' around the upper part of the tubes. Thus the combustion
gases, encircle the tubes and then descend among and along them to their lower
parts which they annularly surround at 71 and then escape by a flue 7 to the
chimney.
This construction secures a compact arrangement, as the combustion chamber
and the upper part of the boiler may be above a floor 8 while the rest of the
boiler extends below it. The combustion chamber may obviously be varied
for burning of either gas or liquid instead of solid fuel.
The descent of the gases along the tubes, affords important practical advantages.
The dust and cinders accompanying the gases pass directly down and are freely
carried out from among the tubes through the outlet flue, instead of being
carried, as is usually the case, up from the combustion chamber, in opposition
to gravity, so that the dust, etc. is liable to be deposited upon the surfaces of
the boiler and boiler-setting.
Between the steam-drum and the surrounding casing is a packing ring 9
of asbestos rope or other suitable material which prevents passage of hot gases
out, or of cold air in, and is yielding enough to allow for expansion and con-
traction of the parts.
The mud-drum 3 is annular having a central vertical opening 10 making
communication from a chamber 11 below, to the central vertical space 12 within
the rows of tubes. This opening 10 serves as an outlet for the dust, cinders &c.
which from time to time fall through the opening 10. Figs. 3 shows a boiler
having a combustion chamber 16 at the lower portion of the casing and a smoke
flue 13 extending through the steam drum to the chimney 14. The space 12
inside the rows of tubes is preferably provided with baffle plates 15.
Dated this 6th day of December 1898.
ABEL & IMRAI,
Agents for the Applicant.

page_text: I, OLIVER IMRAY, of Birkbeck_Bank Chambers, Southampton Buildings, in
the County of London, Chartered Patent Agent, do hereby declare the nature of
this invention (as communicated to me from abroad by William Chase Temple,
of Pittsburgh, Pennsylvania, United States of America, Mechanical Engineer,)
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:
-
This invention relates to a construction of water tube boiler as I shall describe
referring to the drawings accompanying my Provisional Specification.
Fig. 1 is a vertical section of a steam boiler according to this invention;
Fig. 2 is a horizontal section on the line II-II of Fig. 1. Fig. 3 is a vertical
section of a modified form of boiler and Fig. 4 is a horizontal section on the
line IV-IV of Fig. 3.
Referring to Fig. 1, 2 is the steam and water drum and 3 the mud drum of a
vertical steam boiler enclosed in a brick casing 4. Tubes 5 connect the two
drums 2 and 3. The combustion chamber 6 instead of being, as is usual at the
bottom of the boiler setting, is arranged at its upper part and extends annularly
as indicated at 6 around the upper part of the tubes. Thus the combustion
gases, encircle the tubes and then descend among and along them to their lower
parts which they annularly surround at 71 and then escape by a flue 7 to the
chimney.
This construction secures a compact arrangement, as the combustion chamber
and the upper part of the boiler may be above a floor 8 while the rest of the
boiler extends below it. The combustion chamber 6 may obviously be varied
for burning of either gas or liquid instead of solid fuel.
The descent of the gases along the tubes, affords important practical advantages.
The dust and cinders accompanying the gases pass directly down and are freely
carried out from among the tubes through the outlet flue, instead of being
carried, as is usually the case, up from the combustion chamber, in opposition
to gravity, so that the dust, etc. is liable to be deposited upon the surfaces of
the boiler and boiler-setting.
Between the steam-drum and the surrounding casing is a packing ring 9
of asbestos rope or other suitable material which prevents passage of hot gases
out, or of cold air in, and is yielding enough to allow for expansion and con-
traction of the parts.
The mud-drum 3 is annular, having a central vertical opening 10 making
communication from a chamber 11 below, to the central vertical space 12 within
the rows of tubes. This opening 10 serves as an outlet for the dust, cinders &c.,
which from time to time fall through the opening 10. Fig. 3 shows a boiler
having a combustion chamber 16 at the lower portion of the casing and a smoke
flue 13 extending through the steam drum to the chimney 14. The space 12
inside the rows of tubes is preferably provided with baffle plates 15.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:-
:-
1. A boiler having an upper steam and water drum, a lower mud drum, rows of
water tubes connecting them, a lateral combustion chamber discharging into the
space around the tubes immediately below the upper drum and an outlet for
the combustion gases in the lower part of the setting, substantially as described.
2. The modified arrangement of boiler in which the lateral combustion chamber

page_text: discharges into the space around the tubes immediately above the mud drum
and the combustion gases escape by an opening through the steam drum,
substantially as described.
3. In a boiler such as is above referred to, an opening through the mud drum
for passage of dust or cinders, and a packing ring surrounding the steam drum,
substantially as and for the purpose set forth.
ABEL & IMRAY,
Agents for the Applicant.