IMPROVEMENTS IN STEAM PUMPS
Year: 1872

page_text: LETTERS PATENT to William Cary Selden, of Brooklyn, in the
State of New York, United States of America, for the Invention of
"IMPROVEMENTS IN STEAM PUMPS."
Sealed the 21st January 1873, and dated the 30th November 1872.
PROVISIONAL SPECIFICATION left by the said William Cary Selden
at the Office of the Commissioners of Patents, with his Petition,
on the 30th November 1872.
I, WILLIAM CARY SELDEN, of Brooklyn, in the State of New York,
United States of America, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM PUMPS," to be as follows:-
This Invention relates to a direct acting pump; there are two
cylinders connected together, one for steam the other for water. The
pistons in the respective cylinders are the ends of one piston rod that
passes through stuffing boxes in the cylinder heads that face each other.
The valves of the water cylinder are in a chest and connected with the
induction and eduction pipes and ports. The peculiarity of these valves
is that each valve seat is a separate brass frame screwed to the iron
casting, and the valve passes endwise through a mortice in the side of
the chest, and is provided with a spring. Covers are provided for
closing these mortices. In this manner access is given to the valves for
cleaning them without taking the valve chest apart.

page_text: A steam chest is provided upon the steam cylinder, and a main
or D slide valve that opens and closes the steam and exhaust ports as
usual, but this valve is moved by the pressure of steam acting upon
pistons in the valve chest. There is a secondary valve moved by a rod
to open and close the steam ports leading to the pistons that move the
valve.
This part of the said Invention relates to a lever that is moved by a
tappet on the piston rod; and gives a full motion to the auxiliary valve,
regardless of the speed of movement of the pump and valve pistons.
The auxiliary valve is in a frame at the end of the rod, so as to be
independent.
The steam passes through the axilliary valve and through ports in
the valve seat, and thence passes up to the cylinders that contain the
valve moving pistons. The main steam valve acts in the usual manner,
but it is dependent upon the pressure of steam for its movement as con-
trolled by the auxiliary valve.
The steam and exhaust pipes, and the supply and delivery water pipes,
can be connected to either side of the respective chests, and do not have
to be disconnected in removing the valves.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 2
filed by the said William Cary Selden in the Great Seal Patent
Office on the 20th May 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, Ï, WILLIAM
CARY SELDEN, of Brooklyn, in the State of New York, United States
of America, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of November, in the year
of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Cary Selden, Her special
licence that I, the said William Cary Selden, my executors, adminis-
trators, and assigns, or such others as I, the said William. Cary Selden,
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

page_text: 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
STEAM PUMPS," upon the condition (amongst others) that I, the said
William Cary Selden, 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 William Cary Selden, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being made to the Drawings
hereunto annexed, and to the letters and figures marked thereon (that
is to say):
:-

page_text: The steam chest p is upon the steam cylinder a, and a main or
D slide valve o opens and closes the steam and exhaust ports 2, 3, & 4
as usual, but this valve is moved by the pressure of steam acting upon
pistons in the steam chambers g¹ of the chest p. There is a secondary
valve i moved by a rod t to open and close the steam ports leading to
the pistons that move the valve o. The peculiarities of this part of
the Invention relate to a lever u that is moved by a tappet u¹ on the
piston rod f, and gives a full motion to the auxiliary valve i, regardless
of the speed of movement of the pump and engine pistons, because the
tappet may pass even beyond the ends of the lever u, in terminating a
rapid stroke without injury to the parts.
The auxiliary valve is in a frame at the end of the rod t, so as
to be independent.
The steam passes through the auxiliary valve and through ports that
there are in the valve seat and thence passes up to the cylinders g¹,
that contain the valve moving pistons r.
The operation of the steam valves is as follows:-The steam passes
from the pipe w up through the port 8, and fills the chest p; the valves
do not reach this port 8, hence it is always open, and this construction
allows the steam chest to be removed without disconnecting either
steam pipe w or exhaust pipe x, and the openings being provided at
both sides for these pipes, they can be connected where most convenient,
the other side being closed by a plug. The valve o in the position
shown in Figs. 1 and 2 is allowing the steam to pass into the cylinder a
through the ports 3, and the exhaust passes by 2 to 4 through the D
valve o Fig. 2. The auxiliary valve i is in the position shown in Fig. 1,
and the steam is shut off from the cylinder 9³, but the connection from
cylinder g¹ is open to the exhaust through 10, 11, 12, and 13 to 4. As
the piston a completes its movement the lever u is moved and the
valve i moved to the position shown in Fig 7, which opens the port 17
for steam passing by 14, 15, 17, to the cylinder 9' and moving the
pistons and valve ports into the position shown in Fig. 8. In this
movement the exhaust from g¹ remains open through 10, a hole 16, to
12 & 13, but the moment the steam through 14 & 15 is cut off by
the surface of the valve (at 14) coming to the end of the valve i, the
exhaust of 9' is stopped by the surface of 19 closing the hole 16, so as
to confine any small quantity of vapor in g¹ to cushion the piston r,
and at the same time the ports 15 and 17 are opened respectively_to_the_

page_text: ports 13 and 4 through 14, so as to allow the steam to escape from 9*
instantly through 17, 15, 14, & 13 to 4. Thus after the steam has
done its work in g', g³, to move the main valve, the steam is closed to
the valve moving pistons by the motion of the main valve, and so
remains until the reverse movement is given to the auxiliary valve i.
When the valve i is moved in the opposite direction at the end of the
movement of the piston a¹, the ports are opened and closed and the parts
operate in the manner above described.
When the valve i is moved in the opposite direction at the end of the
movement of the piston a', the ports are opened and closed and the parts
operate in the manner above described.
I claim as my Invention,—
First. The secondary valve i fitted to slide between the main valve o
and the seat, and provided with the steam and exhaust ports sub-
stantially as described in combination with the valve moving pistons r
as specified.
Second. The lever u connected with the valve rod t, in combination
with the tappet u¹ upon the piston rod ƒ for moving the valve i with
reliability independent of any slight variation in the stroke of the
engine.
Third. The seats for the valves h, h', screwed to the surface of the
chest, in combination with the said valves h, ³, and the pump, the parts
being arranged and constructed substantially as set forth.
In witness whereof, I, the said William Cary Selden, have
hereunto set my hand and seal, this Third day of May, A.D.
1873.
Witnesses,
WILLIAM CARY SELDEN. (L.S.)
CHA³. H. SMITH, 121, Nassau St., New York.
GEO. T. PINCKNEY,
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