Improvements in Steam Boilers.
Year: 1892

page_text: Date of Application, 9th Dec., 1892
Complete Specification Left, 11th Sept., 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
I, WILLIAM ROBERT RENSHAW, of Phoenix Foundry, Stoke-on-Trent, in the
County of Stafford, Engineer and Ironfounder, do hereby declare the nature of
this invention to be as follows:-
The boiler which forms the subject of this invention consists of an upper and
lower portion. The latter is similar to a Lancashire or Cornish boiler having an
internal furnace or furnaces but is somewhat shorter than usual and inclines from
the furnace end upwards. The upper portion is similar to a tubular locomotive
boiler. The two portions are connected together at their ends by vertical pipes
the communication at the furnace end leading at its bottom into the top of a
passage or passages inside the lower portion of the boiler such passage or passages
descending below the level of the fire bars. The flues in the setting of the boiler
are arranged so that the products of combustion pass from the furnace or furnaces
through the lower portion of the boiler to a combustion chamber to which air may
be admitted to complete the combustion. From thence they pass upwards and then
back through the tubes of the upper portion of the boiler then forwards again along the
outside of this portion, back along the upper part of the outside of the lower
portion and finally along the bottom of this portion to the chimney or the space
between the casing and the boiler may be undivided the products of combustion
passing from the ends of the tubes of the upper portion of the boiler into the space
and descending around the outsides of both portions and passing directly from
the bottom of the space to the chimney.
The water circulates in the boiler as follows:-It flows from the furnace end
along the lower portion by reason of the inclination of the latter, it then passes
upwards into the upper portion and back along it, and descends down the passages
and is again delivered into the lower portion below the fire bars.
Dated this 8th day of December 1892.
W. K. KENSHAW.
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
I, WILLIAM ROBERT RENSHAW, of Phoenix Foundry, Stoke-on-Trent, in the
County of Stafford, Engineer and Ironfounder, 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 boiler which forms the subject of this invention consists of an upper and
lower portion. The latter is similar to a Lancashire or Cornish boiler having an
internal furnace or furnaces but is somewhat shorter than usual and inclines from
the furnace end upwards. The upper portion is similar to a tubular locomotive
boiler. The two portions are connected together at their ends by vertical pipes
the communication at the furnace end leading at its bottom into the top of a
passage or passages inside the lower portion of the boiler such passage or passages
descending below the level of the fire bars. The upper portion of the passages
are so arranged that they can be easily removed for purposes of examination,
repairs and cleaning. The flues in the setting of the boiler are arranged so that
the products of combustion pass from the furnace or furnaces through the lower
portion of the boiler to a combustion chamber to which air may be admitted to
complete the combustion. From thence they pass upwards and then back through

page_text: the tubes of the upper portion of the boiler then forwards again along the outside
of this portion, back along the upper part of the outside of the lower portion and
finally along the bottom of this portion to the chimney, or the space between the
casing and the boiler may be undivided the products of combustion passing from
the ends of the tubes of the upper portion of the boiler into the space and
descending around the outsides of both portions and passing directly from the
bottom of the space to the chimney.
The water circulates in the boiler as follows:-It flows from the furnace end
along the lower portion by reason of the inclination of the latter, it then passes
upwards into the upper portion and back along it, and descends down the passages
and is again delivered into the lower portion below the fire bars.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation of a boiler constructed according to this invention
the setting being shown in section and Figure 2 is a vertical transverse section.
A is the upper portion of the boiler, and a are its tubes. B is the lower portion
and bits internal furnace. CC are vertical pipes connecting the portions A
and B.
The pipe C as shewn leads into the passage D in the lower portion B. E is the
casing surrounding the boilers. F is a combustion chamber separated from the
space around the boilers by the arch G and closed at its bottom by the plate H.
I is the flue leading to the chimney and J is a damper by which the opening to it
can be regulated.
The arrows shew the direction of the products of combustion.
As above explained the space around the boilers may be divided by horizontal
partitions instead of being undivided as shewn.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A steam boiler consisting of two portions connected together the upper
portion being tubular and the lower portion of the Lancashire or Cornish type,
substantially as described.
2. Steam boilers substantially as described and shown in the drawings.
Dated this 11th dow of Contauban 1000
CARPMAEL & Co.,
Agents for the Applicant.