IM- PROVEMENTS IN PUMPS FOR SHIPS AND OTHER PURPOSES, AND IN THE CONSTRUCTION OF BUCKETS OR VALVES FOR THE SAME
Year: 1868

page_text: LETTERS PATENT to Thomas Couldrey, jun., of Kirkdale, near
Liverpool, in the County of Lancaster, for the Invention of "IM-
PROVEMENTS IN PUMPS FOR SHIPS AND OTHER PURPOSES, AND IN THE
343
Sealed the 18th September 1868, and dated the 1st April 1868..
PROVISIONAL SPECIFICATION left by the said Thomas Couldrey. at.
the Office of the Commissioners of Patents, with his Petition, on
the 1st April 1868.
I, THOMAS COULDREY, jun., of Kirkdale, near Liverpool, in the
County of Lancaster, do hereby declare the nature of the said Invention.
for "IMPROVEMENTS IN PUMPS FOR SHIPS & OTHER PURPOSES, AND IN THE
CONSTRUCTION OF BUCKETS OR VALVES FOR THE SAME," to be as follows, that is
to say:-
This Invention consists in forming the buckets and valves of pumps..
for ships and other purposes with two discs, one rigid and vertical and
the other flexible and horizontal, intersecting cach other. at. their

page_text: respective diameters. The flexible piston is formed of leather or
vulcanized india-rubber somewhat larger than the bore of the pump or
cylinder in which it is intended to work, and the rigid disc of metal cut
through its diameter and placed one half above and the other half below
the flexible disc at right angles to and across the centre of the latter, the
upper and lower portions being fixed together by rivets or otherwise.
Frames may also be used instead of these discs if preferred. The flexible
dise is fitted with two plates placed underneath and rivetted to it, one
plate being on one side and the other on the opposite side of the lower
portion of the vertical disc. These plates are formed with dipping or
bracket flanges, the inner ends of which bear or abut against the sides
of the vertical disc. These bearing plates are made to fit the barrel of
the pump or cylinder accurately, leaving a small space only between
their peripheries and the inner surface of the pump or cylinder, thus
affording, when down, a support for the leather or india-rubber disc, and
forming a flexible piston which will open and close as it is moved down
and up the cylinder by the piston rod which is attached to the upper
portion of the rigid disc, the rod being dispensed with when the piston
is required to be used as a valve only.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Couldrey in the Great Seal Patent Office
on the 28th September 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
COULDREY, junior, of Kirkdale, near Liverpool, in the County of
Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of April, in the year of
our Lord One thousand eight hundred and sixty-eight, in the thirty-
first year
of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Thomas Couldrey, Her special licence, that
I, the said Thomas Couldrey, my executors, administrators, and assigns,
or such others as I, the said Thomas Couldrey, my executors, adminis-
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

page_text: 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 PUMPS FOR
SHIPS AND OTHER PURPOSES, AND IN THE CONSTRUCTION OF BUCKETS OR VALVES..
FOR THE SAME," upon the condition (amongst others) that I, the said
Thomas Couldrey, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and scals, 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 Thomas Couldrey, 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 :-
The nature of the said Invention consists in constructing pump
buckets and valves by having a flexible horizontal disc or piston formed
of leather, vulcanized india-rubber, or other suitable flexible substance
fully as large as the bore of the pump barrel or cylinder in which it is
intended to work. A rigid disc cut through and divided at its diameter
is secured one half above and the other half below the flexible or piston
disc and at right angles to and across the latter, the upper and lower
portions being fixed together by rivets or otherwise; or instead of this
rigid disc arrangement frames or portions of discs may be used, as
illustrated by the accompanying Drawings. The flexible disc or piston
is fitted with two plates which I term clack plates, placed underneath
and riveted to it, one plate being on the one side and the other on the
opposite side of the lower half of the vertical metal disc (or substituted
frame); these plates are formed with bracket pieces on their under side,
the inner ends of which bear or abut against the sides of the vertical
disc (or substituted frame). Sometimes, however, I prefer to secure the
clack plates on the upper side of the horizontal or flexible disc, in which
case I use a vertical rigid semi-disc or discs or frame or frames placed at
right angles to and across the rigid disc or frame aforesaid. The
horizontal portions of the said bearing plates are made to fit so as to
leave a small space only between their peripheries and the inner surface

page_text: of the said barrels or cylinders, thus affording, when down, a support
for the leather or india-rubber disc, and forming a flexible piston which
will open and close as it is moved up or down the barrel or cylinder by
the piston rod, which is attached to the upper portion of the vertical
and rigid disc or frame as the case may be. When the piston is required
for use as a valve only the rod can be dispensed with.
Having thus particularly described the nature of the said Invention,
I, in further compliance with the said condition in the said Letters
Patent contained, now proceed to particularly describe and ascertain
in what manner the same is to be performed or carried out in practice,
which I shall do by referring to the accompanying Drawings as
11
Fig. 1, elevation of pump bucket (closed) constructed according to
my Invention, and having the clack plates below the clack leather,
shewing the side elevation of bridge or bow frame; Fig. 2, another
clevation of same, shewing clack plate above the clack leather, a double
cross bar or portions of discs being used on the under side; Fig. 3, view
of same bucket as in Fig. 1, but open, and shewing an end elevation of
bridge or bow frame; Fig. 4, view of same bucket as shewn in Fig. 2,
but open, and shewing end view of frame bridge or bow; Figs. 5 and 6,
plans of the upper sides of Figs. 1 and 2 respectively; Figs. 7 and 8,
plan of under sides of same. The same letters of reference are used
throughout the Drawings.
A, rod (spear rod); B, frame bridge or bow; C, clack plate; D, flexible
disc or clack leather; E, bracket piece on clack plate; F, rigid portion
of disc for under side of flexible piston or disc or cross frame; G, nut
for securing the whole together. These various parts are fitted together
and used as herein-before described.
Having now particularly described and ascertained the nature of the
said Invention, and in what manner the same is to be performed, I hereby
declare that I do not claim the mere constituent details of the said
Invention per sc, what I do claim being the Invention of a bucket or
valve where the clack leather or other substance used in lieu thereof
forms the only means of "sealing" same, the nature whereof is set
forth in the outset of this Specification by the words preceding the words

page_text: "Description of the Drawings," which Invention is illustrated by the
said Drawings.
In witness whereof, I, the said Thomas Couldrey, have hereunto
set my hand and seal, this Twenty-fifth day of September, in
the year of our Lord One thousand eight hundred and sixty-
eight.
Witness,
THOMAS TAYLOR.
THO. COULDREY, JR. (L.S.)