IMPROVEMENTS IN PUMP VALVES
Year: 1862

page_text: LETTERS PATENT to Robert Hawthorn and William Hawthorn, both of
the Town and County of Newcastle-on-Tyne, Engineers, for the In-
"
PROVISIONAL SPECIFICATION left by the said Robert Hawthorn and
William Hawthorn, at the Office of the Commissioners of Patents, with
their Petition, on the 24th November 1862.
We, ROBERT HAWTHORN and WILLIAM HAWTHORN, both of the Town and.
County of Newcastle-on-Tyne, Engineers, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN PUMP VALVES," to be as follows:
This Invention consists in the application of a peculiar annular double mitre
of.
valve to pumps of every description, but specially adapted for the air pumps
surface condensing engines, or, where a free passage, with a small rise or lift,
and where a quick action is desirable, as in the case of pumps worked at high
speeds, and further in the application of a peculiar ball clack or valve, or any
number of them, for the same purposes. The double beat or mitre valve first
named contains an annular space or ring between the inner diameter of the
outer mitre and the outer diameter of the inner mitre of sufficient area to
allow the water or other liquid a passage proportioned to the requirements of
the pump. The upper portion or lid of the valve is formed of cast iron and
wood, the wood part forming the mitres corresponding with those formed in

page_text: the annular space in the valve seat. The lid of the valve is guided by a centre
bolt of copper or other material with a collar or stop on the top end of it, by
which the lift of the valve is regulated. The ball clack or valve consists of a
circular seat of hardwood fitted into a plate forming the bottom of the valve
box, upon which a ball falls and closes the passage at each stroke at the pump,
The balls may be made of cast iron or other material, either hollow or solid,
and the lift regulated by suitable provision.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Robert Hawthorn and William Hawthorn in the Great Seal
Patent Office on the 23rd May 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ROBERT
HAWTHORN and WILLIAM HAWTHORN, both of the Town and County of New-
castle-upon-Tyne, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fourth day of November, in the year of our
Lord One thousand eight hundred and sixty-two, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
us, the said Robert Hawthorn and William Hawthorn, Her special license
that we, the said Robert Hawthorn and William Hawthorn, our executors,
administrators, and assigns, or such others as we, the said Robert Hawthorn
and William Hawthorn, our executors, administrators, or assigns, should at
any time agree with, and no others, from time to time and at all times there-
after 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 "IMPROVE-
MENTS IN PUMP VALVES," upon the condition (amongst others) that we, the
said Robert Hawthorn and William Hawthorn, our executors or administra-
tors, by an instrument in writing under our hands and seals, or under the
hand and seal of one of them, 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 we, the said Robert Hawthorn and William
Hawthorn, do hereby declare the nature of our said Invention, and in
what manner the same is to be performed, to be particularly described and

page_text: ascertained in and by the following statement, reference being had to the
accompanying Drawings and to the letters and figures marked thereon, that
is to say:-
Our said Invention consists in the application of an annular double mitre
valve to pumps of every description, but specially adapted for the air pumps
of surface condensing engines, or where a free passage, with a small rise or
lift, and where a quick action is desirable, as in the case of pumps worked at
high speeds, and further in the application of a peculiar ball clack or valve,
or any number of them, for the same purposes. The double beat or mitre
valve first named contains an annular space or ring between the inner diameter
of the outer mitre and the outer diameter of the inner mitre of sufficient area
to allow the water or other liquid a passage proportioned to the requirements
of the pump. The upper portion or lid of the valve is formed of cast iron and
wood, the wood part forming the mitres corresponding with those formed in
the annular space in the valve seat. The lid of the valve is guided by a centre
bolt of copper or other material with a collar or stop on the top end of it, by
which the lift of the valve is regulated. The ball clack or valve consists of a
circular seat of hard wood fitted into a plate forming the bottom of the valve
box, upon which a ball falls and closes the passage at each stroke of the
The balls may be made of cast iron or other material, either hollow or solid,
and the lift regulated by suitable provision."
pump.
And in order that our said Invention may be fully understood, we shall now
proceed more particularly to describe the same, and for that purpose we shall
refer to the several Figures on the Sheet of Drawings hereunto annexed, the
same letters of reference indicating corresponding parts in all the corresponding
Figures.
Figure 1 of our Drawings is an elevation, partly in section, of the annular
double mitre valve, in which the lid of the valve is shewn raised to its full
"lift," the waterways being indicated by the arrows. The section shows the
mode of fitting in the pieces of wood forming the upper "beats" or faces.
Figure 2 is a plan of the same with one half of the lid removed shewing the
annular mitre or faces of the valve seat; Figure 3 is a sectional elevation of
the ball valves and their wooden seats; and Figure 4 is a plan of the valve
seats and cross bars.
In Figures 1 and 2, A is the annular waterway formed on the cast-iron
seat piece B, to the centre of which is fitted the pin C, along which the cast
iron lid D of the valve works when opening and closing the valve; E is the.
collar stop for limiting the rise of the lid. The actual closing portions or mitres
of the valve are composed of blocks of hard wood F driven into corresponding

page_text: openings or chambers cast in the lid or cover, as is clearly shown in Figure 1,
pins a, a, or other contrivances being employed for preventing these blocks
from shaking out of their places. In Figures 3 and 4, a, a, are the valve
seats formed of hard wood, on to which seats the balls or clacks b, b, fit accur-
ately. These balls are shown full elevated in Figure 3, their lift being
regulated by the cross bars c, c, bolted to the ledge d on the side of the valve
box.
Having now described and particularly ascertained the nature of our said
Invention, and the manner in which the same is or may be used or carried
into effect, we would observe, in conclusion, that what we consider to be novel
and original, and therefore claim as the Invention secured to us by the herein-
before in part recited Letters Patent, is,-
First, the general constructions and arrangements of pump valves substan-
tially as herein-before described.
Second, the application and use to and in pumps of all kinds of annular
double-beat or mitre valves constructed substantially as herein-before
described.
Third, the making of the valves or valve seats of annular mitre valves and
ball or clack valves of hard wood as herein-before described.
In witness whereof, we, the said Robert Hawthorn and William Haw-
thorn, have hereunto set our hands and seals, the Twenty-first
day of May, in the year of our Lord One thousand eight hundred
and sixty-three.
RUBERI HAWTHORN.
(..)
WILLIAM HAWTHORN. (L.S.)