IMPROVEMENTS IN STEAM ENGINES
Year: 1866

page_text: LETTERS PATENT to Barnard William Farey, of the Firm of Bryan
Donkin and Company, of Bermondsey, in the County of Surrey, for the
Invention of "IMPROVEMENTS IN STEAM ENGINES."
Sealed the 31st July 1866, and dated the 10th February 1866.
PROVISIONAL SPECIFICATION left by the said Barnard William Farey
at the Office of the Commissioners of Patents, with his Petition, on the
10th February 1866.
I, BARNARD WILLIAM FAREY, of the Firm of Bryan Donkin and Com-
pany, of Bermondsey, in the County of Surrey, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN STEAM ENGINES," to be as
follows:-
This Invention has for its object improvements in steam engines, and is
applicable when constructing steam engines consisting of a high-pressure
cylinder and a low-pressure cylinder combined. In constructing a horizontal
combined bigh and low pressure steam engine one end of the larger or low-
pressure cylinder is affixed to two brackets cast upon one end of a suitable
bed plate; between these brackets is placed the smaller or high-pressure
cylinder, the back end of which is fastened to the front end of the low-
pressure cylinder. The piston rod of the larger or low-pressure cylinder

page_text: works through a stuffing box formed on the cover on the back end of that
cylinder, and the piston rod of the smaller or high-pressure cylinder works
through a stuffing box formed on the cover at the front end of such cylinder.
On the outer end of each of these piston rods is fixed a cross head, and
the two cross heads are connected by side rods outside of the two steam
cylinders. The cross head on the piston rod of the high-pressure cylinder is
supported by and slides between guides formed on the bed plate. To the
centre of this cross head one end of the connecting rod is attached, and the
other end is connected to the crank of the main or driving shaft of the
combined engine. The air pump.rod receives motion by its upper end being
pin jointed to an enlargement of the end of the connecting rod near where it
is connected to the crank pin of the main or driving shaft, and this pump rod
is caused to work correctly by means of a parallel motion; or the air pump
may be worked by side rods or otherwise. The valve boxes are by preference
formed on the upper sides of the two cylinders, and the two valve boxes are
connected by stean passages formed in the cylindrical castings. There is an
expansion valve to the valve box of the high-pressure cylinder, which is
arranged to be adjusted at any time with facility. The valve rods and
gearing are worked by excentrics on the main or driving shaft of the
combined engine.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Barnard William Farey in the Great Seal Patent Office on
the 8th August 1866.
.s
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BARNARD
WILLIAM FARBY, of the Firm of Bryan Donkin and Company, of Bermondsey,
in the County of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of February, in the year of our Lord
One thousand eight hundred and sixty-six, in the twenty-ninth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Barnard William Farey, Her special licence that I, the said
Barnard William Farey, my'executors, 'administrators, and assigns, or such
others as I, the said Barnard William Farey, my executors, adininis-
trators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the United

page_text: Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN STEAM ENGINES," upon the
condition (amongst others) that I, the said Barnard William Farey, my
executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and
ascertain the nature of the said Invention, and in what manner. the same
was to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Barnard William Farey, do hereby
declare the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
This Invention has for its object improvements in steam engines, and is
applicable when constructing steam engines consisting of a high-pressure
cylinder and a low-pressure cylinder combined.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a side elevation; Figure 2 an end elevation; and Figure 3 a
plan of a combined engine constructed according to my Invention. In con-
structing a horizontal combined high and low pressure steam engine one end of
the larger or low-pressure cylinder A is affixed to two brackets B, B, cast upon
one end of a suitable bed plate. Between these brackets is placed the smaller
or high-pressure cylinder C, the back end of which is fastened to the front
end of the low-pressure cylinder A. The piston rod of the larger or low-
pressure cylinder A works through a stuffing box D formed on the cover on
the back end of that cylinder A, and the piston rod of the smaller or high-
pressure cylinder C works through a stuffing box E, formed on the cover at
the front end of such cylinder. On the outer end of each of these piston rods
is fixed a cross head F, F, and the two cross heads are connected by side
rods G, G, outside of the two steam cylinders. The cross head on the piston
rod of the high-pressure cylinder is supported by and slides between guides
II, H, formed on the bed plate. To the centre of this cross head one end of
the connecting rod I is attached, and the other end is connected to the
crank J' of the main or driving shaft of the combined engine. The air pump
rod K receives motion by its upper end being pin jointed to an enlargement
K' of the end of the connecting rod near where it is connected to the crank
pin of the main or driving shaft J, and this pump rod is caused to work
correctly by means of a parallel motion L, L; or the air pump may be

page_text: worked by side rods or otherwise. The valve boxes M, M, are by preference
formed on the upper sides of the two cylinders, and the two valve boxes are
-connected by steam passages formed in the cylindrical castings. There is an ex-
pansion valve to the valve box of the high-pressure cylinder, which is arranged
to be adjusted at any time with facility. The valve rods and gearing are
worked by eccentrics on the main or driving shaft of the combined engine.
"
Having thus described the nature of. my Invention, I would have it under-
stood that I make no claim to any of the mechanical parts separately,
but what I claim is the combined arrangement and construction herein
described...
:
In witness whereof, I, the 'said Barnard William Farey, have hereunto
set my hand and seal, this Third day of August, in the year of our
Lord One thousand eight hundred and sixty-six.
BARNARD.WILLIAM FAREY. (L.S.)