Improvements in High Speed Trunk Engines, and in the Distributing Valves and Manner of Operating same.
Year: 1893

page_text: Date of Application, 20th Dec., 1893
Complete Specification Left, 20th Sept., 1894-Accepted, 3rd Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in High Speed Trunk Engines, and in the Distributing
Valves and Manner of Operating same.
We CHARLES EVERARD BEAUMONT of 16 South Grove, Peckham, London,
and GEORGE PRYCE WALLINGTON of 15 Bellenden Road, Peckham, London
Engineers do hereby declare the nature of this invention to be as follows:-
This invention consists in placing the distribution valve upon or within a trunk
piston preferably at right angles to the axis of the reciprocal movement of the
same and operating the said valve by an extension backwards or upwards from the
trunnion or gudgeou of the connecting rod, and in forming the inlet and exhaust
ports in the piston corresponding with the steam inlet and outlet respectively
provided in the cylinder or the steam may enter through a hollow extension of the
piston and after doing work upon it be exhausted into the crank chamber if one be
used or nice versa as may be most desirable.
The trunk piston upon or within which the valve is placed may be of one, two,
three or more different diameters and arranged to fit a cylinder or cylinders of
corresponding diameters according to whether the engine is required to be a simple
single or double acting or compound, triple, or quadruple expansion, condensing
or non-condensing engine.
The valve may be of the ☐ type or cylindrical with a number of ports formed
in the same corresponding to the ports communicating with the various cylinders,
if more than one be required.
1
1000
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said C. E. Beaumont and G. P. Wallington.
COMPLETE SPECIFICATION.
Improvements in High Speed Trunk Engines, and in the Distributing
Valves and Manner of Operating same.
We, CHARLES EVERARD BEAUMONT, of 16 South Grove, Peckham, London,
and GEORGE PRYCE WALLINGTON, of 15 Bellenden Road, Peckham, London,
Engineers, 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 consists in placing the distributing valve upon or within a trunk
piston preferably at right angles to the axis of the reciprocal movement of the
same, and operating the said valve by an extension backwards or upwards from the
trunnion or gudgeon of the connecting rod, and in forming the inlet and exhaust
ports in the piston corresponding with the steam inlet and outlet respectively
provided in the cylinder, or steam may enter through a hollow extension of the
piston and after doing work upon it be exhausted into the crank chamber if one be
used, or rice versa, as may be most desirable.
The valve may be of the D type or cylindrical with a number of ports formed
in the same corresponding to the ports communicating with the various cylinders,
if more than one be required.
Our invention will be thoroughly understood upon reference to the annexed
drawings in which

page_text: Figure 1 is a sectional elevation of an engine having a cylindrical valve, the
steam being admitted from above, and
Figure 2 is a sectional elevation of an engine in which an ordinary D valve is
arranged to work upon the top of the trunk piston.
Referring to Figure 1, the crank A is preferably enclosed in a chamber B formed 5
by the bed plate C, so that it may when rapidly turned by the engine splash the
contained lubricant over the working piston D and connecting rod joint D'.
The cylindrical valve E is arranged at right angles to the connecting rod F, an
extension or arm G of which is inserted in a slot H formed in the valve E, or it
may be otherwise connected for reciprocation to alternately cover and uncover the 1
inlet and exhaust steam ports I and J respectively.
The steam port I is preferably arranged in the piston body above the valve E
and steam is admitted thereto by a tube K which may be screwed into or formed
in a piece with the piston D. The upper end of the tube being closed, steam is
caused to enter the ports L, L, the position of which is predetermined so that when
the piston D is reciprocated, the steam may be cut off by the covering of the said
ports by the stuffing box M through or into which they pass.
The exhaust port J is formed in the piston D below the valve E and is so
arranged relatively to the port N in the cylinder that the stean is shut in at a
predetermined part of the return stroke for cushioning purposes.
In Figure 2 both the steam inlet and exhaust ports are formed in the trunk
piston below the valve E which is of the ordinary D type sliding between
guides P, P, upon the top face of the piston D and operated by the extension of
the connecting rod in the same manner as in Figure 1.
By arranging that the steam entry and exhaust are cut off by the movement of
the piston itself irrespective of the sliding valve, we are enabled to give as early
an opening as may be desired.
The sliding valve E therefore simply governs the time of opening to admit
steam to the cylinder and oxit to the exhaust, the amount of expansion and com-
pression or cushioning being predetermined by the relative positions of the piston
and cylinder ports, the movement of the piston itself alternately covering and
uncovering these ports to cut off the steam inlet and exhaust respectively.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A high speed steam engine constructed and operated in the manner as
described and shown in Figures 1 and 2 of the annexed drawings.
2. In a high speed steam engine, the combination of a distributing valve set át
right angles to the direction of motion of the piston, and operated by an arm or
extension of the connecting rod with steam passages so arranged in the extension
of the piston, or in the piston itself as to cut. off steam at a predetermined
period of the stroke; and in the arrangement of an exhaust port in the piston
relatively to an outlet in the cylinder side to shut in steam at a predetermined
period of the exhaust stroke for cushioning purposes, as described and substantially
as shown in Figure 1.
3. Governing the admission of steam into and outlet from the cylinder of a
high speed engine by means of a valve operated by the connecting rod, and
effecting the cut off of the admission and exhaust for expansion and compression
purposes by the movement of the piston itself, as described and shown.
M1
H. GARDNER,
Patent Agent, 166, Fleet Street, London,.
Agent for the said Charles Everard Beaumont and
George Pryce Wallington.