IMPROVEMENTS IN ENGINES FOR PUMPING WATER, APPLICABLE TO ENGINES POR FEEDING STEAM BOILERS
Year: 1866

page_text: LETTERS PATENT to Andrew Betts Brown, of No. 13, Cannon Street, in
the City of London, for the Invention of "IMPROVEMENTS IN ENGINES FOR
PUMPING WATER, APPLICABLE TO ENGINES POR FEEDING STEAM BOILERS."
Sealed the 6th October 1866, and dated the 2nd June 1866.
PROVISIONAL SPECIFICATION left by the said Andrew Betts Brown at the
Office of the Commissioners of Patents, with his Petition, on the
2nd June 1866.
I, ANDREW BETTS BROWN, of No. 18, Cannon Street, in the City of London,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
ENGINES FOR PUMPING WATER, APPLICABLE TO ENGINES FOR FEEDING STEAM
BOILERS," to be as follows:-
This Invention has for its object improvements in engines for pumping
water, applicable to engines for feeding steam boilers. I employ a steam
cylinder containing a piston with a piston rod of large diameter on one side of
it and terminating in the ram of the pump. Steam is constantly supplied to
the end of the cylinder through which the piston rod works, so as to form a

page_text: steam spring of sufficient power to cause the return of the plunger and working
parts; the effective stroke is made against this steam spring, and to make this
stroke the steam is admitted to the further side of the piston by means of a
slide valve working in a casing beyond the end of the piston, the valve face
being on a plane at right angles to the direction of motion of the piston. The
valve has horns formed on it, between which a crank pin or small eccentric is
lodged, and the said pin or eccentric is carried by a light shaft passing out of
the valve case through a stuffing box and journal, and having a small fly wheel
upon it which takes its motion by means of a connecting rod passing from a
crank pin in the face of the wheel to an arm which projects from the piston
rod or ram between the steam cylinder and the barrel of the pump. Double-
acting pumps may be worked in a similar manner, the areas of the two sides
of the steam cylinder being in this case made more nearly equal.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Andrew Betts Brown in the Great Seal Patent Office on the
30th November 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ANDREW
BETTS BROWN, of No. 13, Cannon Street, in the City of London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of June, 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
Andrew Betts Brown, Her special licence that I, the said Andrew Betts
Brown, my executors, administrators, and assigns, or such others as 1, the
said Andrew Betts Andrew Betts Brown, my executors, administrators, 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 Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN ENGINES FOR PUMPING WATER, APPLICABLE TO ENGINES
FOR FEEDING STEAM BOILERS," upon the condition (amongst others) that I,
the said Andrew Betts Brown, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their bands and seals, should

page_text: 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Andrew Betts Brown, 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 engines for pumping.
water, applicable to engines for feeding steam boilers. I employ a steam
cylinder containing a piston with a piston rod of large diameter on one side of
it and terminating in the ram of the pump. The steam is admitted to the.
further side of the piston by means of a slide valve working in a casing beyond
the end of the cylinder, the valve face being on a plane at right angles to the
direction of motion of the piston. The valve has borns formed on it, between
which a crank pin or small eccentric is lodged, and the said pin or eccentric
is carried by a light shaft passing out of the valve case through a stuffing box
and journal, and having a small fly wheel upon it which takes its motion by
means of a connecting rod passing from a crank pin in the face of the whee!
to an arm which projects from the piston rod or ram between the steam cylinder
and the barrel of the pump, or the arm and connecting rod may be made
together or in one piece. Double-acting, pumps may be worked in a similar
manner, the areas of the two sides of the steam cylinder being in this case
made more nearly equal.
And 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 view, and Figure 2 a front view of a pumping engine
constructed according to my Invention; Figure 3 is a vertical section of the
same; Figure 4 is a transverse section taken at the line 1, 1, Figure 3.
a is the steam cylinder; b, the pump cylinder, and c is a rib connecting
the parts a and b. The parts a, b and c, are all cast together in one piece,

page_text: piston d of the steam cylinder and the plunger e of the pump are also formed
together in one hollow casting, and, as is shewn, the rod of the steam piston
and the plunger of the pump may conveniently be turned to the same diameter,
but this is not essential. The pump valves and connections are of the ordinary
description. The slide valve f, and the apparatus to work it are carried on
the cylinder cover g. The valve face is formed on the cylinder a, and the
plane thereof is at right angles to the axis of the cylinder.
As arranged in the Drawing there are four ports in the valve face, viz., the
usual steam ports leading to the top and bottom of the cylinder, and the ex-
haust port between them, and there is also a fourth port which the valve
never closes leading from the steam supply passage h into the valve casing
which is formed in one piece with the cylinder cover g. This arrangement
admits of the cylinder cover and valve being all removed in one piece without
breaking the connection with the steam supply and exhaust pipes.
Although I prefer on the whole to have a steam port in the valve face com-
municating with the space below the piston this space may be made to commu-
nicate constantly with the steam supply. The valvef has horns at the back,
and it receives its motion from a crank or eccentric pin on a boss at the end of
the light shaft i. The boss and the side of the valve case are faced where
they come together, and the crank or eccentric pin which works the valve has
a ring of hardened steel upon it, and the valve is of hard bell metal, so that'
there may be little friction and wear. The shaft i passes through a stuffing
box in the side of the valve case, but very little packing is required; it also
passes through a bearing on the cylinder cover, and it has a small fly wheel k
at its outer end. The shaft i and wheel k receive motion from the piston rod
by means of the connecting rod and arm L. The arm may be a fixture to the
piston rod. It is more convenient, however, to form the arm and connecting
rod in one piece, as is shewn in the Drawing, and sufficiently light to be
sprung into its place. It has at one end an eye which is slightly conical
and springs over a corresponding pin on the face of the fly wheel. At the
other end of the connecting rod and arm is a conical plug which fits a
corresponding recess in the piston rod, and is there secured by a screw and
a nut.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that what I claim is the
constructing pumping engines with the slide valve working on a face at right
angles to the direction of motion of the piston, such valve being actuated by a
rotating axis entering the valve case as hereiu described.

page_text: I also claim the giving motion to the valve by means of the crank shaft
of the engine entering into the valve case through a steam-tight joint.
In witness whereof, I, the said Andrew Betts Brown, have hereunto set
my hand and seal, this Twenty-ninth day of November, in the year
of our Lord One thousand eight hundred and sixty-six.
ANDREW BETTS BROWN. (L.B.)