Improvements in and in connection with Boiler Furnaces.
Year: 1895

page_text: Date of Application, 14th June, 1895
Complete Specification Left, 23rd Dec., 1895-Accepted, 1st Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in and in connection with Boiler Furnaces.
I, MALCOLM CROSS of the Firm of Agar, Cross & Company, of 31 Saint
Vincent Place, in the City of Glasgow, Foreign Merchants, do hereby declare the
nature of this invention (as communicated to me by Edwin Stinton, Engineer, 124
and 136 Calle Defensa, Buenos Ayres, Argentine Republic) to be as follows:-
This invention has for its objects to better adapt boiler furnaces for burning straw
or similar light material which is apt to be carried by the draft, either before
completion of the combustion or in the form of ash, or unconsumed carbon into or
upon the tubes or other heating surfaces, and to provide simple means for introducing
steam or other jets to blow the accumulating dust and soot off the tube plate and
heating surfaces.
To prevent the obstruction of the tubes in boilers by the straw we employ two
divisions or baffle-plates in the firebox. The one nearest the firedoor is composed
of a cast iron base plate or bridge having a groove along its top edge in which rests
the wrought iron plate that forms the top half of and completes the first baffle-plate,
the second baffle-plate is hung at the top of the firebox between the first baffle-plate
and the tube-plate. The flame passes over the first and under the second baffle-
plate on its way to the tubes. Any ash or sparks carried over the first baffle-plate
drops into the space between it and the tube plate and may be periodically removed
through a doorway at the bottom opening to the ash box under the fire grate. To
clean out the tubes at the firebox end we employ a steam jet apparatus consisting of
a pipe having small perforations at one end and at its other end a branch with a
flexible connection to a steam pipe suitable handles for holding and guiding the
apparatus being also provided. This jet pipe may be occasionally introduced
into the firebox through a hollow stay or tube carried through and expanded
or otherwise fixed in the water jacketted wall or side of the firebox in a
convenient position to permit of the steam jet being led in to play on the tube-
plate.
Dated this 13th day of June 1895
Improvements in and in connection with Boiler Furnaces.
I, MALCOLM CROSS, of the Firm of Agar, Cross & Company, of 31 Saint
Vincent Place, in the City of Glasgow, Foreign Merchants, do hereby declare the
nature of this invention and in what manner the same is to be performed, as
communicated to me, to be particularly described and ascertained in and by the
following statement :-
This invention has for its object to better adapt boiler furnaces for burning straw
or similar light material which is apt to be carried by the draft, either before

page_text: completion of the combustion or in the form of ash, or unconsumed carbon, into or
upon the tubes or other heating surfaces, and to provide simple means for introducing
steam or other jets to blow the accumulating dust and soot off the tube plate and
heating surfaces.
The invention is illustrated by the accompanying drawings, Fig. 1 of which is a
part longitudinal vertical section and Fig. 2 a transverse vertical section of a boiler
as constructed in accordance with my invention.
To prevent the obstruction of the tubes A in the boiler B by the straw I employ
two divisions or baffle-plates in the firebox C. The one nearest the firedoor is
composed of a cast iron base plate or bridge D having a groove E along its top edge
in which rests the wrought iron plate F that forms the top half of and completes
the first baffle-plate which may either be placed inclined as shewn or vertical as
indicated by the dotted lines, Fig. 1. The use of the groove not only permits of
the baffle-plate swinging as required but it also allows of the expansion of the plate
laterally and maintains it straight. The second baffle-plate G is hung at the top of
the firebox between the first baffle-plate F and the tube-plate H. The flame passes
the first baffle-plate F and under the second baffle-plate G on its way to the
tubes A. Any ash and sparks carried over the first baffle-plate F drop into the
space between it and the tube-plate H and may be periodically removed through a
doorway I at the bottom opening to the ash box under the fire grate J. To clean
out the tubes A at the firebox end I employ a steam jet apparatus, such as is
commonly used in the Babcock & Wilcox type of boilers, said apparatus consisting
of a pipe K having small perforations k at one end and at its other end a branch k¹
with a flexible connection to a steam pipe suitable handles for holding and
guiding the apparatus being also provided. This jet pipe K may be occasionally
introduced into the firebox C through a hollow stay or tube L carried through and
expanded or otherwise fixed in the water jacketted wall or side M of the firebox C
in a convenient position to permit of the steam jet being led in to play on the
tube-plate H.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is―
1. In a boiler furnace the combination of the baffle-plate F and base plate D the
latter having a groove along its top edge for supporting and maintaining straight the
baffle-plate substantially as described and illustrated.
2. The arrangement of portable steam jet apparatus adapted to be passed through
a hollow stay or tube in the fire-box and to be directed to play on the tube-plate
substantially as described and illustrated.
Dated this 21st day of December 1895.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 St. Vincent Street, Glasgow, Agent for the Applicant.