Improvements in Exhaust Steam Discharge Pipes of Steam Engines.
Year: 1890

page_text: :
ate of Application, 13th Aug., 1890
Complete Specification Left, 13 h May, 1391-Accepted, 27th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Exhaust Steam Discharge Pipes of Steam
Engines.
I, JAMES CLEMINSON of Dashwood House 9 New Broad Street in the City of
London and County of Middlesex, Civil Engineer do hereby declare the nature of
this invention to be as follows:-
:-
This invention relates to an improved method of discharging the exhaust steam
of steam engines, particularly locomotive engines, whereof such exhaust steam is
utilised for the purposes of creating or assisting in the creation of eductive draught
through the flue tubes of the boilers of such steam engines, and has for its object
the more perfect control, wider distribution and greater efficiency of such
draught.
According to one arrangement the discharge conduit or conduits are led from
the cylinders of the engine and joined together and likewise to a discharge chamber
of peculiar construction. The said chamber is formed with an orifice at its upper
side whence the exhaust steam is discharged to the chimney, and at its lower side
is formed an aperture wherein works or slides a hollow truncated cone having a
splayed or trumpet shaped mouth at its lower end. The said truncated cone may
be fixed but preferably is moveable and controlled by means of suitable hand gear
worked from the foot plate of the engine.
By raising or lowering the truncated cone the eductive force of the exhaust
discharge and therefore of the draught may be increased or decreased at will.
The upper orifice of the truncated cone is preferably kept below the level of the
orifice of the exhaust conduit or of the discharge chamber in order to allow of the
exhaust steam becoming diffused over the said orifice of the truncated cone with a
view to accentuate the eductive force of the draught through the said truncated
cone but the said upper orifice of the truncated cone may be placed upon the level
with or above the level of the orifice of the said exhaust conduit or discharge
chamber.
By another arrangement the exhaust conduit is made in one piece and with or
without the discharge chamber.
COMPLETE SPECIFICATION.
Improvements in Exhaust Steam Discharge Pipes of Steam
Engines.
JAMES CLEMINSON of Dashwood House, 9, New Broad Street in the City of
London and County of Middlesex, Civil Engineer 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 :—
This invention relates to an improved method of discharging the exhaust steam
of steam engines, particularly locomotive engines, whereof such steam is utilised for
the purpose of creating or assisting in the creation of eductive draught through the
tubes of the boilers of such steam engines, and has for its object the more perfect
control, wider distribution and greater efficiency of such draught.
According to one arrangement, the discharge conduit or conduits are led from
the cylinders of the engine and joined together as shewn at A. Figure 5. and
| likewise to a discharge chamber as shewn at B. B Figure 3,

page_text: The said chamber, shewn at B. B. C. Figures 3 & 4. is formed with an orifice at
its upper side C whence the exhaust steam is discharged to the chimney, and at its
lower side is formed an aperture D wherein works or slides a hollow truncated
cone E having a splayed or trumpet shaped mouth at its lower end.
The said truncated cone may be fixed, but preferably is moveable and controlled
by means of suitable hand gear worked from the footplate of the engine similar to
that shewn at Figures 1 & 2.
By raising or lowering the truncated cone the eductive force of the exhaust
discharge and therefore of the draught that may be increased or decreased at will.
The upper orifice of the truncated coue E is preferably kept below the level of
the orifice of the exhaust conduit (see Figure 5) or of the discharge chamber B. B. C.
(see Figures 3 & 4) in order to allow of the exhaust steam becoming diffused over
the said orifice of the truncated cone E with a view to accentuate the eductive
force of the draught through the said truncated cone E, but the said upper orifice
of the truncated cone E may be placed upon the level with or above the level of
the orifice C of the said exhaust conduit (Figure 5.) or discharge chamber B. B. C.
(Figures 3 & 4).
By another arrangement the exhaust conduit is made in one piece and with or
without the separate discharge chamber.
Figure 1. is a cross section through the smoke box shewing the position and
method of working the exhaust steam discharge pipe.
Figure 2. is an elevation of the exhaust steam discharge pipe and section of the
smoke box shewing the above.
Figures 3. 4. & 5. are sections of the exhaust steam discharge pipe shewing the
different arrangement as described above.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, declare that what I
claim is.
First. The combination of the discharge conduit or conduits with the moveable
truncated cone or pipe the lower opening of which is nearest to the lower tubes of
the boiler, substantially as and for the purpose herein described and shewn on the
drawings.
Secondly. The whole combination or arrangement substantially as herein
described and shewn on the drawings.
Dated this 13th day of May 1891.
JAS. CLEMINSON.