Year: 1886

page_text: Date of Application, 1st Apr., 1886.
- Complete Left, 3rd Jan., 1887.
Complete Accepted, 4th Feb., 1887.
I, WILLIAM DOVER of 30 Spellow Lane Liverpool in the County of Lancaster.
Engineer do hereby declare the nature of this invention to be as follows:-
-
The object is to provide a simple and efficient engine actuated by liquid pressure for
giving motion to the reversing gear or gear for starting stopping and reversing marine
and other large steam engines.
..
My invention consists essentially in the novel arrangement and combination of
parts herein set forth. The piston rod of a hydraulic or like cylinder is coupled to
the starting stopping and reversing lever of the large engine by a connecting rod or
rods and to its own valve gear by a rack and pinion or their equivalents. Horn plates
or stops are provided for the starting lever near the points where the actuating power
is applied so as to prevent over motion of the said reversing lever. The pinion shaft
is connected to the valve of the auxiliary engine by screw and mut connections and to
a hand wheel by a friction clutch.
When it is desired to start stop or reverse the large engines motion is given to the
valve of the auxiliary engine by a lever or its equivalent liquid enters the cylinder
of the said engine and gives motion to its piston until the starting lever has been
moved to the required distance, at which time the port for entrance of liquid to the
auxiliary engine cylinder has been closed by the action of the rack and pinion on the
screw gear above mentioned. I prefer to obtain the liquid under pressure for actuating
the auxiliary engine from a steam generator.

page_text: I WILLIAM DOVER of No. 30 Spellow Lane, Liverpool, in the county of Lancaster,
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:-
:-
The object is to provide a simple and efficient engine actuated by liquid pressure for
giving motion to the reversing gear, or gear for starting, stopping and reversing
marine and other large steam engines.
My invention consists essentially in the novel arrangement and combination of parts
herein set forth. The Piston rod of a hydraulic or like cylinder is coupled to the
starting, stopping and reversing lever of the large engine by a connecting rod or rods
and to its own valve gear by a rack and pinion or their equivalents. Horn plates or.
stops are provided for the starting lever near the points where the actuating power is
applied so as to prevent over motion of the said reversing lever. The pinion shaft is
connected to the valve of the auxiliary engine by screw and nut connections and to a
handwheel by a friction clutch.
DESCRIPTION OF THE DRAWINGS.
Figures 1 and 2 are elevations at right angles to each other of my improved
engines. a hydraulic cylinder secured to the main engine framework b. c. piston rod
coupled to the starting, stopping and reversing lever d pivotted at e by the connecting
rods f. y. horn plates secured to the frame b, and disposed so as to prevent excessive
motion of the reversing lever d. h. rack secured to the cross-head and piston rod c.
and gearing with the pinion i. on the shaft j. k. mitre wheel fixed on the shaft j.
7. mitre wheel free to revolve in bearings m. n. valve spindle having a square end n
fitting freely in a square hole through the mitre wheel 1. instead of the above
arrangement the spindle and wheel may have a key or feather free to move in a
slot. o. operating lever having a boss of fitting freely around a cylindrical portion of
the spindle n. between two collars p, one or both of which is or are movable to allow
of the lever o being placed in position. The lever o passes through a curved or
inclined slot in the carrier a secured to the frame b. threaded cup on the spindle n.
which receives the screwed end of the valve rod s. t handwheel fitting loosely on the
shaft j.and caused to move therewith by means of the friction plate u. tightened_by
w reversing gear. guides for piston rod and rack, y valve box. The
valve box and cylinder have the usual supply and exhaust ways, ports and passages
and the liquid pressure is obtained by connecting to the water in the main or auxiliary
boilers or to any other convenient source of liquid under pressure.
the nut v.
The action of the apparatus is as follows:-When it is desired to start, stop or
reverse the engines the lever o. is moved so as to travel in the slot in the carrier
Such motion causes the lever to travel in the direction of the longitudinal axis of the
spindle and by means of the boss o¹ & collars p. carry with it the spindle n. and

page_text: valve rods. The valve attached to the rod . which is preferably of the usual Dee form
is thereby moved so as to admit liquid into the cylinder and give motion to the piston,
piston rod c connecting rod f. and reversing gear lever and also to the rack . and
pinion i. shaft j. and mitre wheels & and 1. The latter wheel 7. causes the spindle n.
to rotate and screw back the rod & so as to replace the valve attached thereto in its
original position by the time that the reversing gear has moved the required distance.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is :-
First. Engines having the combination of parts herein specified, for the purpose set
forth.
Second. Engines for actuating reversing gear operated by liquid pressure substan-
tially as set forth.