IMPROVEMENTS IN HORIZONTAL DOUBLE CYLINDER STEAM ENGINES
Year: 1881

page_text: LETTERS PATENT to Druitt Halpin, of No. 9, Victoria Chambers, Westminster,
in the County of Middlesex, for an Invention of "IMPROVEMENTS IN
HORIZONTAL DOUBLE CYLINDER STEAM ENGINES."
PROVISIONAL SPECIFICATION left by the said Druitt Halpin at the Office
of the Commissioners of Patents on the 26th July 1881.
DRUITT HALPIN, of No. 9, Victoria Chambers, Westminster, in the County
of Middlesex. "IMPROVEMENTS IN HORIZONTAL DOUBLE CYLINDER STEAM
ENGINES."
My Invention relates to a construction of horizontal double cylinder steam
engines, whereby I am enabled to get strength and simplicity of structure, economy
of workmanship, and adaptability for fixing in various positions.
I make in one piece a framing, at one end of which I provide two bearings for
the crank shaft, boring these out by a transverse boring bar. The other end of
the frame I finish with a flat face, which forms the covers for the two cylinders
that are fixed against it parallel, side by side. The part of the frame next the
cylinders is bored with two cylindrical cavities to form the guides for the two cross
heads, and at the sides of the frame are bored cylindrical guides for the slide rods.
The end of the frame carrying the bearings has two flat feet immediately under the
bearings, these feet having flanges and bolt holes for bolting down. The cylinders
have also two flat feet cast on them, these feet being equal and symmetrical with
the feet of the bearings, and faced in the same plane therewith. The engine thus
constructed can be bolted down to a flat bed. When it is used as a portable engine
it is placed on two saddle pieces provided on the top of the boiler, and as its ends
are similar it may be placed either way, that is to say, with its cylinders either
towards the fire box end or towards the smoke box end of the boiler. When the
engine is thus employed I fix the flanges of the cylinder feet firmly to their saddle
by bolts and nuts, so as to make a rigid fixture of that end of the engine which
has the steam connections. I also bolt down the other end of the frame, but I pass
the bolts through holes a little slotted to allow for expansion and contraction_of
the boiler. Sometimes it is desirable to place the engine under the boiler. For
this purpose I extend back from the ashpit a bracket and flange to receive the feet
of the bearing end of the engine frame, and making the bottom of the smoke box
flat I bolt to it the cylinders, which for this purpose have a flat face and flange on
their upper side. To the underside of the cylinders I bolt a foot to rest on the
ground, and this foot may be made hollow to be employed as a feed water tank.
The cylinders of the engine may be equal, or they may be made of different sizes,
so that the engine may work as a compound engine.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Druitt Halpin in the Great Seal Patent Office on the 24th
December 1881.
DRUITT HALPIN, of No. 9, Victoria Chambers, Westminster, in the County
of Middlesex. "IMPROVEMENTS IN HORIZONTAL DOUBLE CYLINDER STEAM
ENGINES."
My Invention relates to a construction of horizontal double cylinder steam
engines, whereby I am enabled to get strength and simplicity of structure, economy
of workmanship, and adaptability for fixing in various positions.
I make in one piece a framing, at one end of which I provide two bearings for
the crank shaft, boring these out by a transverse boring bar. The other end of the
frame I finish with a flat face, which forms the covers for the two cylinders that
are fixed against it parallel, side by side. The part of the frame next the cylinders
is bored with two cylindrical cavities. to form the guides for the two crossheads,
and at the sides of the frame are bored cylindrical guides for the slide rods. The
end of the frame carrying the bearings has two flat feet immediately under the
bearings; these feet having flanges and bolt holes for bolting down. The cylinders
have also two flat feet cast on them, these feet being equal and symmetrical with
the feet of the bearings, and faced in the same plane therewith. The engine thus
constructed can be bolted down to a flat bed. When it is used as a portable engine
it is placed on two saddle pieces provided on the top of the boiler; and as its ends:
are similar it may be placed either way, that is to say, with its cylinders either
towards the fire box end or towards the smoke box end of the boiler. When the
engine is thus employed I fix the flanges of the cylinder feet firmly to their saddle,
by bolts and nuts, so as to make a rigid fixture of that end of the engine which has,
the steam connections. I also bolt down the other end of the frame, but I pass the
bolts through holes a little slotted to allow for expansion and contraction of the
boiler. Sometimes it is desirable to place the engine under the boiler. For this
purpose I extend back from the ash-pit a bracket and flange to receive the feet of.
the bearing end of the engine frame, and making the bottom of the smoke box flat,
I bolt to it the cylinders, which for this purpose have a flat face and flange on their
upper side, or I employ the arrangement hereinafter described. To the underside
of the cylinders I bolt a foot to rest on the ground, and this foot may be made
hollow to be employed as a feed water tank. The cylinders of the engine may be
equal, or they may be made of different sizes, so that the engine may work as a
compound engine.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 of the accompanying Drawings shews a side elevation of my before
described improved construction of engine applied as a portable engine; Fig. 2
shews a plan of the same; and Fig. 3 shews transverse sections taken on the lines.
a, a, and b, b. A, A, are the cylinders, which have a flat foot B, by which they are
bolted to the saddle piece C fixed on the top of the boiler D. The framing E is
provided at one end with a flat face F forming the cover of the cylinders, and at
the other end it has feet G, G, by which it is secured to the saddle piece C¹; H, H,
are the bearings for the crank shaft I; and J, J, are the cylindrical cavities forming
the guides for the crossheads; while at K, K, are formed cylindrical guides for the
slide rods L. The feet B and G being symmetrical, the engine can be fixed on the
boiler either in the position shewn or in the reversed position.
L
Fig. 4 shews a side elevation, and Fig. 5 à part end view of the same construc-
tion of engine, as above described, arranged beneath the boiler D. For this purpose

page_text: the ashpit has a projecting bracket D', on which the feet G of the engine frame E
are bolted, while the foot B at the cylinder end stands upon a hollow casting M,
which may be utilised as a feed water tank. The bottom of the smoke box being
of the usual round form, a saddle piece N is provided for the smoke box to rest
on, this saddle piece being either separate from or in one piece with the cylinders.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I hereby declare that I make no claim to any of the parts
separately, but I claim the construction and arrangement of steam engine herein
described and shewn in the accompanying Drawings.
In witness whereof, I, the said Druitt Halpin, have hereunto set my hand
and seal, this Twenty fourth day of December, in the year of our Lord, One
thousand eight hundred and eighty one.
DRUITT HALPIN. (L.S.)