Improvements in Relief Valves applicable for the Cylinders of Loco- motives and Stationary Engines using Piston or other Valves.
Year: 1898

page_text: Date of Application, 15th Nov., 1898
Complete Specification Left, 15th Aug., 1899-Accepted, 30th Sept., 1899
Improvements in Relief Valves applicable for the Cylinders of Loco-
motives and Stationary Engines using Piston or other Valves.
We, THEODORE DRAYTON GRIMKÉ-DRAYTON, of Haydock Collieries, Haydock,
Mining Engineer, THOMAS ROBINSON, of Market Street, Earlestown, Engineer,
and ALFRED BALL, of 394, St. Helens Road, Earlestown, Engineer, all in the
County of Lancaster, do hereby declare the nature of this invention to be as
follows:-
:-
This invention relates to relief valves applicable for the cylinders of loco-
motives and stationary engines using piston or other valves.
The invention comprises a pipe or pipes connecting the two opposite ends of
the cylinder or valve chest, and controlled by a specially constructed valve or
valves that open when the steam is shut off from the engines, and close when
the steam is turned on, whereby the effect of the compression is done away with
altogether, thereby allowing the machinery full freedom in running, and reducing
the wear and tear on the working parts. About midway between the two ends
of the pipe there is a partition in which the stem of a valve is mounted, and
above this is a small cylinder with a valve seating in which the valve rises and
falls. When this valve is raised above its seat the pipe constitutes a through
connection between the two ends of the cylinder or steam chest, but if the valve
be closed down on to its seat this connection is closed also, as the partition in
conjunction with the valve effectually closes all communication. A smaller pipe
admits live steam to the small valve cylinder during the time that the engines
are working, that is to say the pressure of this steam passing through the pipe
will close the valve down to its seat, thus cutting off all communication between
the two ends of the cylinder through the pipe that connects their two ends, but
if the steam is shut off this valve rises, and instantly establishes communication
with the two ends of the cylinder.
In action therefore when the engine is working under steam, the valve is
closed cutting off all communication by the pipe with the opposite ends of the
cylinder. When however the steam is cut off and the engine stopped, the valve
is raised by the compression, thus placing the two ends of the cylinder in direct
communication. In the case of engines standing, should there be any leakage
in the stop valve or regulator while such engines are standing, the invention
will prevent any accumulation of pressure or water from condensation in the
cylinder or cylinders, thereby preventing damage which is so often the case
due to the above mentioned cause.
In thus describing our invention, it must be understood that we do not confine
ourselves to the exact arrangement described of the valve as this may be altered
in various ways so long as the same result is secured.
-
1000

page_text: Improvements in Relief Valves applicable for the Cylinders of Loco-
motives and Stationary Engines using Piston or other Valves.
We, THEODORE DRAYTON GRIMKÉ-DRAYTON, of Haydock Collieries, Haydock,
Mining Engineer, THOMAS ROBINSON, of Market Street, Earlestown, Engineer,
and ALFRED BALL, of 394, St. Helens Road, Earlestown, Engineer, all in the
County of Lancaster, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
This invention relates to relief valves applicable for the cylinders of loco-
motives and stationary engines using piston and other valves.
The invention will be understood from the following description, reference
being had to the accompanying drawings, in which:
Figure 1 is a front elevation partly in section of a steam cylinder and valve
chest fitted with piston valves, and
Figure 2 a plan.
The invention comprises a pipe A (or pipes) connecting the two opposite ends
of the valve chest B (or cylinder) and controlled by a specially constructed
valve C (or valves) that opens when the steam is shut off from the engines and
closes when the steam is turned on, whereby the effect of the compression is
done away with altogether, thereby allowing the machinery full freedom in run-
ning and reducing wear and tear on the working parts. About midway between
the two ends of the pipe A there is a partition D in which the atom E of the
valve is mounted, and above this a small cylinder F with a valve seating G in
which the valve rises and falls. When this valve C is raised above its-seat G,
the pipe A constitutes a through connection between the two ends of the steam
chest B, but if the valve C be closed down on to its seat, this connection is
closed, as the partition D in conjunction with the valve C effectually closes all
communication. A smaller pipe H admits live steam to the small valve cylinder F
during the time that the engines are working, that is to say the pressure of this
steam passing through pipe H will close the valve C down to its seat G, thus
cutting off all communication between the two ends of the cylinder I through
the pipe A that connects the valve chests, but if the steam is shut off this valve C
is free to rise, and establish communication with the two ends of the cylinder I.
In action therefore when the engine is working under steam, the valve C is
closed, cutting off all communication by the pipe A with the opposite ends of
the cylinder I. When however the steam is cut off and the engine stopped,
the valve C is raised by the compression, thus placing the two ends of the
cylinder I in direct communication. In the case of engines standing, should
there be any leakage in the atop valve or regulator while such engines are stand-
ing the invention will prevent any accumulation of pressure or water from con-
densation in the cylinder or cylinders, thereby preventing damage which is sq
often the case due to the above mentioned cause.
In thus describing the invention it must be understood that we do not confine
ourselves to the exact arrangement described of the valve, as this may be altered
in various ways so long as the same result is secured.
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 improvement in or connected with steam engines which consists in

page_text: providing a through communication between the two ends of the cylinder or
valve chest by a pipe or pipes, and in providing the said pipe or pipes with a
valve so arranged as to close when the engine is running and cut off all com-
munication between the two ends of the cylinder or valve chest but to be free
to open when the engine is at rest and establish through communication between
the two ends, so that any compression inside the cylinder due to leakage of
water or steam may be liberated, from one end onto the other, thereby prevent-
ing damage, substantially as described.
2. In steam engines, the combination of a pipe or pipes forming a through
communication between the two ends of the cylinder or valve chest, a partition
at or about the middle of this pipe fitted with a valve working in a small
auxiliary cylinder, and an auxiliary steam pipe carrying live steam to the said
cylinder, whereby when the engine is in motion the steam admitted through
the pipe acting on the auxiliary valve will close the same and cut off all com-
munication between the two cylinder ends, while when the steam is cut off and
the engine at rest this valve will be free to be opened by any compression due
to the leakage of water or steam, substantially as and for the purpose described.
3. The general combined arrangement and construction of parts forming the
improved pressure relief device for the cylinders or valve chests of steam engines,
substantially as set forth.
Dated this 14th day of August 1899.
WM.*P. THOMPSON & Co.,
Patent Agents of Liverpool, Manchester, Birmingham, & London.