Year: 1886

page_text: Date of Application, 6th Dec., 1886
Complete Left, 27th Aug., 1887
Complete Accepted, 25th Oct., 1887
We EUSTACE WIGZELL and JOSEPH POLLIT Engineers, of Bank Foundry, Sowerby
Bridge, in the County of York do hereby declare the nature of our invention to be as
follows:-
Our invention consists of a circular Piston Valve, which is connected to a rod
working from an eccentric, to and fro in the usual manner; inside this circular
piston valve, there is a cut-off piston valve (which is also worked by an eccentric)
which is connected by a tube where the rod of the outer valve passes through;
tube runs through the Stuffing-box and is attached to Collamores patent Governor
(Patent No. 992885).
this
This inner piston valve has its ends cut at an angle, and the ports inside the outer
valve are also formed in a similar manner.
By this means the inner piston valve is moved in a semi-circle by the Governor
cutting of the steam, as it is regulated by the Governor, which opens or shuts the
ports as required, keeping up a uniform speed of piston.
To prevent any steam escaping round the pipe which passes through the Stuffing-
box, and is connected to the Governor, there is a deep piston on the inner rod which
works the outer piston valve and passes through the Cylinder in the inner valve, thus
preventing any steam escaping round the rod, this arrangement only necessitating one
Stuffing-box.
The steam passes at each end of the cylindrical slide chest, and goes through the
angular ports, the exhaust being in the centre of the outer piston slide valve or the
reverse of this.-By this arrangement the whole of the valves are in equilibrium
requiring little or no power to work them.
The angle of each end of the inner piston valve, which is attached to the Governor,
is made to give a quicker or slower cut-off as may be desired.
In the outer slide valve piston we put in Wigzell & Pollit's patent piston Springs
(Patent No. 7947).
Our invention consists in a combination of the whole.

page_text: Improvements in Valves for Steam Engines.
We, EUSTACE WIGZELL and JOSEPH POLLIT Engineers, of Bank Foundry, Sowerby
Bridge, in the County of York do hereby declare the nature of our invention for
IMPROVEMENTS IN VALVES FOR STEAM ENGINES and in what manner the same is to he
performed to be particularly described and ascertained in and by the following
statement
Our invention consists of a circular piston valve, which is connected to a rod
working from an eccentric to and fro in the usual manner, inside this circular piston
valve, there is a cut-off cylindrical valve (which is also worked by an eccentric) which
is connected by a tube where the rod of the outer valve passes through, this tube runs
through the stuffing box and is attached to a uniform speed Governor.
This inner cylindrical valve has its ends cut at an angle, and the ports inside the
outer valve are also formed in a similar manner.
By this means the inner cylindrical valve is moved in a semi-circle by the Governor,
cutting off the steam. as it is regulated by the Governor which opens or shuts the
ports as required, keeping up a uniform speed of piston.
To prevent any steam escaping round the pipe which passes through the stuffing
box, and is connected to the Governor, there is a deep piston on the inner rod which
works the outer piston valve and passes through the cylinder in the inner valve thus
preventing any steam escaping round the rod, this arrangement only necessitating one
stuffing box.
The steam passes at each end of the cylindrical slide chest, and goes through the
angular ports, the exhaust being in the centre of the outer piston slide valve, or the
reverse of this.
By this arrangement the whole of the valves are in equilibrium requiring little or
no power to work them.
The angle of each end of the inner cylindrical valve, which is attached to the
Governor, is made to give a quicker or slower cut-off as may be desired.-In the
outer slide valve piston we put in Wigzell and Pollits patent piston Springs (Patent
No. 79474).
We can also arrange this valve in the following manner.-We make an outer piston
valve with straight ports, this outer piston is connected to the eccentric rod by a tube
with a stuffing box at one end, through this tube there is a rod which is connected to
an inner cylindrical valve with the ports cut at an angle and which is attached to an
eccentric the twist motion being worked by the Governor.-The ports on the inner side
of the outer piston valve are also cut at an angle.
The steam is admitted to the inside valve through the ports as shown in the drawing
and the exhaust passes at each end of the outer piston valve.-Our invention consists
in a combination of the whole.
The drawing shows in fig. 1 sheet 1 a section of the piston valves.-A is the inlet
for steam which passes into the chamber B through the ports as shown, the steam

page_text: pressure then coming inside the inner cylindrical valve E. E. passing through the
angular ports F. F. into the ports in the outer piston valve O. O. which leads to the
cylinder. The exhaust comes at each end C. C. and through the openings D. D.--
The inner cylindrical valve rod G. passes through the tubo H. which is connected to
the outer piston valve K.
L. L. are the ports leading to the cylinders.-The sections shown in figures 2 and 3.
are taken through at M. and N. respectively.
In the drawing fig. 1. on sheet 2. A. is the circular piston valve, B, B the cut-off
cylindrical valve with the ends cut at an angle, C. the connecting tube, and D the
outer valve. E. is the deep piston on the inner rod working the outer piston valve
the steam passing at each end F. F. of the cylindrical slide chest, G. being the exhaust.-
Figures 2 and 3 are sections taken through at M and N respectively.-The drawing
on Sheet No. 1. shows the steam entering the reverse way.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
1. The combination of a Piston and cylindrical valve and general arrangement
substantially as described.
2. A Piston valve substantially as described.
3. A cylindrical valve working inside the outer piston valve with angular ports cut
in same substantially as described.
4. An inner cylindrical valve working through a tube and stuffing box connected to
the outer piston valve substantially as described.
5. The method used for the passage of the steam through the inside of the inner
cylindrical valve substantially as described.
Dated this 26th day of August 1887.