A Combined Disc Stop and Reversing Valve, Applicable to Steam Winches, Steam Steering Engines, Launch Engines, Cranes, and similar Structures.
Year: 1887

page_text: Date of Application, 27th July, 1887
Complete Left, 27th Apr., 1888
Complete Accepted, 1st June, 1888
PROVISIONAL SPECIFICATION.
A Combined Disc Stop and Reversing Valve, Applicable to Steam
Winches, Steam Steering Engines, Launch Engines, Cranes, and
similar Structures.
We, JAMES WILLIAM DONOVAN of 4 Elizabeth Street, Newcastle Road, Sunderland,
Engineer and JOHN WIGHAM of South Hylton Engineering Works, Sunderland,
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to a novel construction or arrangement of valve and valve
box with the necessary ports and acts as stop valve and reversing valve combined.
According to our invention, the valve and valve box is circular, and suitable ports
are arranged radially around the valve and valve box to admit steani to the centre and
or outside of an ordinary slide valve or piston valve in the steain winch, steam steering
engine, launch engine, etc. as the case may be. The valve has two ports for steam
and two for exhaust, the valve works on a circular flat face in valve box with suitable
ports and divisions in same, the main exhaust being carried down the centre of the
valve box. The valve is worked with suitable spindle through stuffing box and gland
through cover of valve box and provided with a handle.
A small movement of handle to right or left reverses the motion of the engine and
when the handle or valve is in mid position, steam is then entirely shut off from the
main slide valve and thus the valve acts as stop valve.
H. GARDNER,
166, Fleet Street, London,
Agent for the said James William Donovan
and John Wigham.

page_text: We JAMES WILLIAM DONOVAN of 4 Elizabeth Street, Newcastle Road, Sunderland,
Engineer and JOHN WIGHAM of South Hylton Engineering Works, Sunderland
Engineer, do hereby declare the nature of our invention and in what manner the
same is to be performed to he particularly described and ascertained in and by the
following statement :-
The invention relates
1. To a valve and valve box with the necessary ports (two or four as the case may
be). The valve acts as stop and reversing valve combined with a distributing valve
as herein after described.
2. To a distributing valve of flat form having four ports with corresponding ports
in cylinder face.
The reversing valve and box is circular and suitable ports, two or four, as may be
required are arranged radially around the valve and box to admit steam to the ports
in the distributing valve or to the centre or outside of any ordinary ☐ valve in the
steam winch etc.
Where four ports are used in the circular valve, two are for steam and two for
exhaust, where two ports then one is for steam and the other for exhaust. The valve
works on a circular flat face in the valve box with corresponding ports, the main
exhaust being carried down centre of valve box. The valve is worked with suitable
spindle through stuffing box and gland in cover of valve box with lever to same, a
small movement of handle to right or left admits steam to one or other of the ports
in the distributing valve or to the inside or outside edges of any ordinary D valve and
thus reverses the motion of the engine.
When the handle is in mid-position steam is then shut off from main slide valve
and thus acts as a stop valve.
The distributing valve is arranged as follows.
The cylinder face of the engine has the face extended at right angles to direction
of travel of valve and in this extended part of the face is a port, a corresponding
port being cast in the slide valve, and this port establishes a communication to outside
ports.
One port in the slide valve is long enough in direction of travel to be always full
open to the port in the cylinder face. Communication to the ports in the cylinder
face may be made at top or bottom, or one at top and one at bottom. Steam is
admitted slightly to outside of valve to keep it to the face. When the ordinary D valve
is used with the disc valve a plate and bolt through the steam chest cover is arranged
to keep the valve to the face.
The invention will be more particularly understood by the drawings in which the
letters of reference agree on all the Figures.
Figure 1 is a vertical section through the valve box and the cover and the reversing
valve, the valve being full open to exhaust and steam.
Figure 2 is a plan of the valve box through a, of Figure 1 and partly in section.
Figure 3 is a sectional plan through c, d of Figure 1.

page_text: figure is a plan of underside of reversing valve.
Figure 5 section through valve on line g, h, Figure 4.
Figure 6 section through valve on line e, f, Figure 4.
Figure 7 sectional plan of cylinder face for connection with distributing valve.
Figure 8 sectional plan through distributing valve face.
Figure 9 section through i, j, Figure 8.
Figure 10 section through k, l, Figure 8.
Figure 11 is a section through valve
construction.
box, valve and cover of a modified
Figure 12 a plan of the valve box through m, n, Figure 11 partly in section.
Figure 13 is sectional plan through line o, p, Figure 11.
Figure 14 is sectional plan through line q, r, Figure 11.
Figure 15 is a plan of valve E.
Figure 16 is a section of valve E through s, t, Figure 15.
Figure 17 is a section of valve E through u, of Figure 15.
Figure 18 is a plan of valve box cover showing starting handle.
A is the body of the valve box. B the valve box cover. C the spindle for actuating
the valve E. D is the gland. E is the valve acting as a stop and reversing valve.
F, F, are steam or exhaust spaces in valve box A depending upon which way
engine is to run. G is a division dividing the main exhaust J from the other
passages. H is the branch for main steam pipe in cover B. I branch for steam
or exhaust to inner edge of ordinary D valve or to port T Figures 7 and 8 of
distributing valve.
K is a branch for steam or exhaust to outer edge of ordinary D valve or to port S
in Figures 7 and 8. Lis the steam port or ports in reversing valve E. M is the
exhaust port or ports in reversing valve E.
and
or
Q steam exhaust port or ports in valve face of valve box. R port in cylinder
face to admit steam to inner edge of valve or port T.
S, port in cylinder face to admit steam to outer edge of valve or ports U. N is
a handle mounted on the spindle C for actuating the valve E, the pointer being
secured by the thumb screw either as full open ahead, full open astern or lower,
according to the purpose or machine to which our invention is applied, the mid-
distance as indicated at Figure 8 being "stop" such as when no steam is to be
admitted through the valve E.
The thumb screw works through a quadrant P.
W steam or exhaust space dividing ports Q from Q'.
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 arrangement of combined stop and reversing valve described with reference
to Figures 1 and 2 of the annexed drawings provided with two ports, also the similar
valve with four ports shown at Figures 11 and 12 and the employment for Steam
Winches, Steam Steering Engines, Launch Engines, Cranes and similar structures
as herein before described.
2. In combination with the stop and reversing valve referred to in the first
claim, the distributing slide valve acting as and for the purpose described.
The 27th day of Anril 1888
H. GARDNER,
166, Fleet Street, London,
Agent for the said J. W. Donovan
and J. Wigham.