IMPROVEMENTS IN WASTE WATER VALVES OF STEAM ENGINE CYLINDERS, PARTICULARLY OF LOCOMOTIVE ENGINE CYLINDERS
Year: 1871

page_text: LETTERS PATENT to Harold Wilhelm Widmark, of 13, Tamworth
Place, Redland Road, in the City and County of Bristol, Engineer,
for the Invention of "IMPROVEMENTS IN WASTE WATER VALVES OF
STEAM ENGINE CYLINDERS, PARTICULARLY OF LOCOMOTIVE ENGINE CYLINDERS."
Sealed the 16th January 1872, and dated the 9th August 1871.
PROVISIONAL SPECIFICATION left by the said Harold Wilhelm Wid-
mark at the Office of the Commissioners of Patents, with his
Petition, on the 9th August 1871.
I, HAROLD WILHELM WIDMARK, of 13, Tamworth Place, Redland
Road, in the City and County of Bristol, Engineer, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN WASTE WATER
VALVES OF STEAM ENGINE CYLINDERS, PARTICULARLY OF LOCOMOTIVE ENGINE
CYLINDERS," to be as follows:-

page_text: The common practice to empty the cylinders in locomotive engines is
by a set of cocks which are opened and closed by rods and levers worked
from the foot plate. This results in a great deal of complication, and
to evade that I substitute valves for the cocks, and I control the valves
by means of steam or water pressure.
Drawing No. 1 shows the method of doing this. The valve has a
plunger or solid piston upon it working in a chamber and acted upon
on the top by steam admitted from the boiler through the pipe A; the
pressure keeps the opening B closed that water or steam cannot escape
from the cylinders, but in the moment the pressure is by a valve or cock
at the platform taken from the pipe A the valve C is free to open and
the water escapes from the cylinder. There is generally one cock on each
end of cylinders, and one on each cylinder valve chest. I substitute a
valve in each case, and the steam pipe A connects these valves so that
only one pipe from one of the valves need go to the platform. In this
arrangement the valve is closed when the pressure is on the pipe, but
by a simple modification this may be reversed.
Drawing No. 2 shows a valve which is open when the pressure is on
the pipe and which is kept shut by the pressure in the cylinders.
Figure 1º, 1, 1º, shews this valve, it consists of a plunger or piston A
and valve B butting one against the other. Steam from the boiler acts
on A and pushes B from its seat, so that the passage is open for the
water from the cylinder to escape, when the pressure is taken off the
cylinder pressure pushes the valve B up against the seat and the cylinder
is closed.
Drawing No. 3 shews the valve which is put on the boiler near the
driver; when the valve stands as shewn the boiler pressure is on the
small valves on the cylinders, and when the valve is screwed towards
the seat S the steam is shut off from the boiler, but the communication
is open to the atmosphere, so that there will be only atmospheric pressure
on the cylinder valves. This may also be effected by a common three-
way cock.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Harold Wilhelm Widmark in the Great Seal
Patent Office on the 8th February 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HAROLD
WILHELM WIDMARK, of 13, Tamworth Place, Redland Road, in the
City and County of Bristol, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Ninth day of August, in the year
of our Lord One thousand eight hundred and seventy-one, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Harold Wilhelm Widmark, Her special
license that I, the said Harold Wilhelm Widmark, my executors, admi-
nistrators, and assigns, or such others as I, the said Harold Wilhelm
Widmark, 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 WASTE WATER VALVES OF STEAM ENGINE
CYLINDERS, PARTICULARLY OF LOCOMOTIVE ENGINE CYLINDERS," upon the con-
dition (amongst others) that I, the said Harold Wilhelm Widmark, 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 Harold Wilhelm Widmark, 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 relates to the waste water valves of steam engine
cylinders, particularly of locomotive engine cylinders.
The common practice to empty the cylinders in locomotive engines
is by a set of cocks which are opened and closed by rods and levers

page_text: worked from the foot plate. This results in a great deal of complication,
and to evade that I substitute valves for the cocks, and I control the
valves by means of steam or water pressure.
Drawing No. 1 shews the method of doing this. The valve has a
plunger or solid piston upon it working in a chamber and acted upon on
the top by steam admitted from the boiler through the pipe A. The
pressure keeps the opening B closed that water or steam cannot escape
from the cyliuders, but in the moment the pressure is by a valve or cock
at the platform taken from the pipe A, the valve C is free to open and
the water escapes from the cylinder D. There is generally one cock on
each end of cylinders and one one on each cylinder valve chest. I sub-
stitute a valve in each case, and the steam pipe A connects these valves
so that only one pipe from one of the valves need go to the platform.
In this arrangement the valve is closed when the pressure is on the
pipe, but by a simple modification this may be reversed.
Drawing No. 2 shews a valve which is open when the pressure is
in the pipe, and which is kept shut by the pressure in the cylinders.
Figures 1, 1, 1º, shew this valve, it consists of a plunger or piston A
and valve B butting one against the other. Steam from the boiler
admitted by the pipe a acts on A and pushes B from its scat, so that
the passage
is open
for the water from the cylinder to escape. When
the pressure is taken off, the cylinder pressure pushes the valve B up
against the seat and the cylinder is closed.
Drawing No. 3 shews the valve which is put on the boiler near the
driver; when the valve stands as shewn the boiler pressure is on the
small valves on the cylinders, and when the valve is screwed towards
the seat S the steam is shut off from the boiler, but the communication
is open to the atmosphere, so that there will be only atmospheric pressure
on the cylinder valves. This may also be effected by a common three-
way cock. Water under pressure from the boiler may be used in a
similar manner to control the waste valves in place of steam.
Having thus described the nature of my said Invention, and the
manner of performing the same, I would have it understood that I claim
the controlling of waste water valves of steam engine cylinders by means
of steam or water under pressure led to such valves by pipes from a hand

page_text: cock or valve conveniently placed within reach of the engine driver in
lieu of by rods and levers as at present.
In witness whereof, I, the said Harold Wilhelm Widmark, have
hereunto set my hand and seal, this Seventh day of February,
in the year of our Lord One thousand eight hundred and seventy-
two.
H. WILH. WIDMARK. (L.S.)