IMPROVEMENTS IN PLOUGHING, AGRICULTURAL, AND TRACTION ENGINES."
Year: 1880

page_text: LETTERS PATENT to Robert Burton, 'of the Steam Plough Works, Leeds, in
the County of York, for an Invention of "IMPROVEMENTS IN PLOUGHING,
AGRICULTURAL, AND TRACTION ENGINES."
PROVISIONAL SPECIFICATION left by the said Robert Burton at the Office
of the Commissioners of Patents on the 26th July 1880.
15
ROBERT BURTON, of the Steam Plough Works, Leeds, in the County of York.
'IMPROVEMENTS IN PLOUGHING, AGRICULTURAL, AND TRACTION ENGINES."
This Invention has for its object improvements in ploughing, agricultural, and
traction engines, especially to promote economy of fuel in these engines by providing
them with two cylinders, or exchanging each existing cylinder for two cylinders
so that the engine may be rendered compound, the steam working first in the
smaller or high pressure cylinder, and then expanding into the larger or low
pressure cylinder, after the well known method of working of compound engines.
To effect this conveniently I substitute for the existing cylinder a cylinder of
considerably larger diameter, and containing a smaller cylinder concentrically
within it. The outer cylinder has two valve chests upon it, one on each side.
The passages in connection with one of the valve faces are the usual ones,
namely, steam passages passing to the ends of the cylinder, and the outlet passage
by which the steam which has done its work is conducted away. These passages
belong to the outer or low pressure cylinder. The steam passages of the other
valve face communicate with channels formed in or provided upon the end covers.
of the cylinder, and the exhaust passage communicates with a channel passing
half round the outer cylinder and entering the other or opposite valve chest.
The smaller or high pressure cylinder placed concentrically within the larger
cylinder I cast of a piece with one of the covers. The low pressure piston is
annular and it works upon the exterior of the high pressure cylinder. It has two
piston rods, one on each side. All of the piston rods are keyed to the same cross
head, and where an old engine is altered the connecting rod previously in use
serves to couple this crosshead with the crank.
The valve rod for the low pressure cylinder is worked from the ordinary
eccentrics by a rocking shaft.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Robert Burton in the Great Seal Patent Office on the 26th
January 1881.
**
ROBERT BURTON, of the Steam Plough Works, Leeds, in the County of York.
IMPROVEMENTS IN PLOUGHING, AGRICULTURAL, AND TRACTION ENGINES."
This Invention has for its object "Improvements in Ploughing, Agricultural,
and Traction Engines," especially to promote economy of fuel in these engines by
providing them with two cylinders, or exchanging each existing cylinder for two
cylinders so that the engine may be rendered compound, the steam working
first in the smaller or high pressure cylinder, and then expanding into the larger
or low pressure cylinder, after the well known method of working of compound
engines. To effect this conveniently I substitute for the existing cylinder a
cylinder of considerably larger diameter, and containing a smaller cylinder
concentrically within it. The outer cylinder has two valve chests upon it, one
on each side. The passages in connection with one of the valve faces are the
usual ones, namely, steam passages passing to the ends of the cylinder, and the
outlet passage by which the steam which has done its work is conducted away.
These passages belong to the outer or low pressure cylinder. The steam passages
of the other valve face communicate with channels formed in or provided upon the
end covers of the cylinder, and the exhaust passage communicates with a channel
passing half round the outer cylinder and entering the other or opposite valve
chest.
The smaller or high pressure cylinder placed concentrically within the larger
cylinder I cast of a piece with one of the covers, or both cylinders may be cast of
a piece with one of the covers. The low pressure piston is annular and it works
upon the exterior of the high pressure cylinder. It has two piston rods, one on
cach side. All of the piston rods are keyed to the same cross head, and where an
old engine is altered the connecting rod previously in use serves to couple this
cross head with the crank.
The valve rod for the low pressure cylinder is worked from the ordinary eccentrics
by a rocking shaft.
In order that my said Invention may be most fully understood and readily
carried into effect, I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation of portions of an engine which is rendered compound
in accordance with my Invention; Figure 2 shows the same parts in plan;
Figure 3 is a vertical longitudinal section of the cylinders which I substitute for
the ordinary single cylinder; Figure 4 is an horizontal and longitudinal section of
the cylinders; Figure 5 is a transverse section of the cylinders taken through the
exhaust ports of each; Figure 6 is a similar section but taken somewhat obliquely
along the passage by which the exhaust steam from the high pressure cylinder is
led into the valve chest of the low pressure cylinder; Figure 7 is a transverse
section taken along the passage by which the steam passes from the boiler into the
steam dome.
a is the high pressure cylinder, and bis the larger or low pressure cylinder in
which the cylinder a is contained; c and d are their respective pistons, the latter
annular; e and f, f, are the piston rods which are coupled together by the cross
head g; is the passage by which steam passes from the boiler to the dome; i is
the regulator slide or stop valve for starting and stopping the engine; when this
valve is open steam from the boiler enters the high pressure valve chest k by the

page_text: passage 1; m is the passage by which the exhaust steam from the high pressure
cylinder is led into the valve chest of the low pressure cylinder; m, n, are steam
passages of the high pressure cylinder, and o, o, are the similar passages of the low
pressure cylinder; p is the exhaust passage from the low pressure cylinder; it is
connected with the pipe q by which the exhaust steam is led into the chimney;
r is the ordinary connecting rod by which motion is transmitted from the piston
rods and cross head to the crank shafts of the engine; t, t, are the ordinary
eccentrics with their rods and link; u is the reversing lever; v is a rocking shaft,
it receives motion from the eccentrics, an arm v' upon it being coupled by a short
link with a projection or arm formed or fixed upon one of the slide valve rods.
On the other side of the engine the shaft carries an arm v¹¹, which is similarly
connected with the other slide valve rod, so that the two slide valves move in
unison.
Having thus described the nature of my said Invention and the manner of
performing the same, I would have it understood that I claim as my Invention
of improvements in ploughing, agricultural, and traction engines,-
First. Compounding such engines by substituting for the single cylinder two
concentric cylinders made to occupy its place, connecting the several piston rods
with a cross head, and transmitting the motion by the ordinary connecting rod to
the crank upon the crank shaft of the engine, substantially as described.
Second. The valve gear by means of which from the usual eccentrics both the
slide valves have motion imparted to them.
Third. The compound cylinders with their passages and arrangements, sub-
stantially as shown by the Figures 3, 4, 5, 6, and 7.
Fourth. The construction. of ploughing, agricultural, and traction engines,
substantially as described and shown by the annexed Drawings.
In witness whereof, I, the said Robert Burton, have hereunto set my hand
and seal, this Twenty fourth day of January, in the year of our Lord One
thousand eight hundred and eighty-one.
ROB, BURTON. (L.S.)