Improvements in Cylinders and Valves of Compound Steam Engines.
Year: 1891

page_text: Date of Application, 23rd May, 1891
Complete Specification Left, 14th Aug., 1891-Accepted, 5th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Cylinders and Valves of Compound Steam Engines.
I, JOHN BRISCOE, of 436 Beckwith Street, Birkenhead, in the County of
Cheshire, Millwright and Engineer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to improvements in cylinders and valves of compound steam
engines.
The object of my invention is to permit a certain quantity of steam to pass from
the steam valve through the bottom port into the cylinder, sufficient to do the work
of the upward stroke of the cylinder piston, and after it has performed the work
the same charge passes through the lower port and steam valve and upper port to
perform the downward stroke of the cylinder piston before it is allowed to exhaust
itself.
This invention is constructed with a steam cylinder having a cylinder piston and
piston rod and cylinder cover. On the side of the steam cylinder is the valve casing
with a steam pipe, and inside the valve casing I place the steam valve and steam
valve rod. At the base of the cylinder I construct the bottom port and at the
upper part of the cylinder the top port, these said ports being formed of a suitable
shape, and the exhaust is situated between the aforesaid ports.
Dated this 1st day of July 1801
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.
COMPLETE
SPECIFICATION.
Improvements in Cylinders and Valves of Compound Steam Engines.
I, JOHN BRISCOE, of 436 Beckwith Street, Birkenhead, in the County of
Cheshire, Engineer, 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:-
My invention relates to improvements in cylinders and valves of compound steam
engines.
The object of my invention is to permit a certain quantity of steam from the
boiler to pass through the valve box into the upper port of cylinder to perform
the downward stroke, then the same charge passes direct through the valve into
the bottom port to do the upward stroke before it is allowed to exhaust itself.
And in order that my invention may be thoroughly understood, I now proceed to
describe the accompanying vertical section thereof, reference being had to letters
marked thereon. The piston rod, steain valve rod, and steam pipe is described as
broken off in the drawing.
g
This invention is constructed with a steam cylinder a cylinder piston i and
piston rode and the cylinder cover . On the side of the steam cylinder j is the
valve casing d with a steam pipe and inside the valve casing d I place the steam
valve and steam valve rod a. At the base of the cylinder I construct the
bottom port and at the upper part of the cylinder the top port c of the shape
described in the said vertical section, and the exhaust / between the aforesaid ports.
At one side of the cylinder j is a true surface in which there are three parallel
apertures c, h, m, of these c, and h, communicate respectively with the and
upper
lower ports of the cylinder. The centre opening m, is the largest being the
exhaust communicated by 1 either with a condenser or the atmosphere. The valve g,

page_text: slides over this surface or facing, and thus allows c, and h, to communicate with j;
the other portin either case being open for the passage of steam from the boiler.
Firmly secured to the valve-facing is the-steam chest into which the steam pipe f
opens. In the top is a stuffing, box through, which the, valve-rod a passes. This
rod is firmly secured to the valve g, and imparts motion to it. It is connected to
the engine by the usual eccentric, and is thus moved up and down so as to allow
the steam to enter at the right part of thesstroke. In the illustration.the-piston-i
is descending and the valve rod is at the bottom of its stroke, so that both the ports
are open.
Having now particularly described and ascertained the nature of my said
invention and in what manner, the same is to be performed, I declare that what
I claim is
: In a steam' cylinder; the combination of the cylinder piston and rod, and the top
and bottom ports, with the steam valve, rod, steam chest; steam pipe and exnaust,
substantially as herein described and' according to the accompanying drawing.
Dated this 14th day of August 1901
J. P. BAYLY,
18, Fulham Place, W., Agent for. the Applicant.