Improvements connected with Governing Steam Engines.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements connected with Governing Steam Engines.
We, HARRY BOLTON DAGLISH and THOMAS WINDUS, both of St. Helens Foundry,
St. Helens, in the County of Lancaster, Engineers, do hereby declare the nature
of this invention to be as follows:-
This invention has reference, mainly, to winding engines, that is to the means of
governing or controlling the speed of such engines; and it has for its object,
primarily, to provide, in connection with such engines, improvements, or improved
means, by which their regulation or government is automatically effected; but as
regards the applications of the invention, in connection with different engines, it
is specially applicable or suitable for use upon existing winding engines, in which
the steam is distributed by slide valves; and its description hereafter is confined
as applied to such engines; nevertheless it is not necessarily restricted to such
engines, as in other engines of analogous or equivalent kinds, or in cases, where
its use may be advantageous or serviceable, it may also be applied.
According to this invention, in a winding engine, the cutting off of the steam
to the cylinder or cylinders of the engine during the stroke of the piston, is
effected automatically, by the employment or use in connection with, or the
attachment to, or on, the main valve chest or box or chests or boxes, of a
Corliss," or other suitable valve, or valves, worked by a weigh-shaft, or the
valve gear for operating the main steam distribution valves. Thus the cut-off
of the steam will be regulated or controlled automatically, in the desired
"
manner.
1
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Bated this 9th day of August 1897.
We, HARRY BOLTON DAGLISH and THOMAS WINDUS, both of St. Helens Foundry
St. Helens, in the County of Lancaster, 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 has reference, mainly, to winding engines that is, to the means
of governing or controlling the speed of such engines; and it has for its object,
primarily, to provide, in connection with such engines, improvements, or improved
means, by which their regulation or government is automatically effected, but as
[Price 8d.1

page_text: regards the application of the invention, in connection with different engines, it is
specially applicable or suitable for use upon existing winding engines, in which
the steam is distributed by slide valves; and its description hereafter is
confined as applied to such engines; nevertheless it is not necessarily restricted to
such engines, as in engines of analogous or equivalent kinds, or in cases, where its
use may be advantageous or serviceable, it may also be applied.
According to this invention, in a winding engine, the cutting off of the steam
to the cylinder or cylinders of the engine during the stroke of the piston is
effected automatically, i.e. by an automatic cut-off gear, by the employment of a
"Corliss," or other suitable valve, or valves attached to, or on, the main valve
chest or box, or chests or boxes, worked by a weigh shaft of the valve gear for
operating the main steam distribution valve, the cut-off of the steam being thus
regulated or controlled automatically, in the desired manner, by the governor of
this valve gear.
In the drawings hereto annexed which illustrate this invention, Figure 1 is a side
elevation, and Figure 2 a plan illustrating the invention; and Figure 3 is an
elevation shewing a modification of same.
Figure 4 is a side elevation, Figure 5 is an end view, partly in section, and
Figure 6 a plan shewing details of an automatic mechanism.
Referring to the drawings, and more particularly to Figures 1 and 2, a is the
cylinder of the engine, which, say, is a winding engine; and b is the valve case, in
which the steam distribution valve (which is of any known suitable kind) works in
the usual way.
This valve case, and the valve within it, as well as the cylinder,
may be taken to be those of an existing engine, to which the invention is to be
applied, with the steam entering the valve box b by a branch c, and the slide
distribution valve itself being operated by a valve rod d, actuated by the ordinary
radius rod e; the cutting off at different points of the stroke being effected
automatically by the governor of the automatic valve gear f, which may be of any
known suitable type.
The arrangement in these drawings is adapted for a cut-off valve of the lift
type, which is of any known suitable kind, and is disposed in the valve case h,
the steam to which is admitted through the branch h¹, and from which it passes
to the branch c of the main valve box b, by the branch h². This valve is raised
onto and off its seat by a valve rod, i, which has connected with it a dashpot
mechanism at 22, of any known suitable kind. This cut off valve is operated by the
main valve gear of the engine by the weigh shaft k, the cut off of steam at different
points of the stroke being regulated or controlled by the governor fof the automatic
valve gear of the engine. The motion to and from the weigh shaft k, in this case,
is conveyed by the trip bar of the valve automatic gear, lever on the weigh
shaft k, second lever 12 on said weigh shaft, and a rod 18 connecting (2 with
the lever ¹ of the cut-off valve stem i.
In Figure 3, the cut-off valve is of the Corliss type, of which is the shaft, and i¹
the lever for rocking this shaft. The rod 3 for working this valve, in this case,
and its lever 12, are disposed on the underside of the weigh shaft k, in lieu of above,
as in Figures 1 and 2. In other respects, the mechanism is the same. The dashpots
for controlling the action of this valve, will be connected to the gear, through the
vertical rods 14.
The valve gear, shewn in detail in Figures 4, 5, and 6, is, generally, of a common
type used in connection with winding engines, for operating the main distribution
and cut off valves thereof. That is to say, the trip bar l, through which the
cut off valve is operated from the main valve shaft d, is actuated through triggers m,
hinged at m*, the upper ends of which, when raised, lift the trip bar off the
plate m on the trigger block m² on the end of the valve shaft d, and so release the
trip bar; the period of the stroke at which the release takes place, being governed
by the position, vertically, in which the sliding cams o stand, this position being
regulated by the governor f, to which they are connected by a governor rod p, and
a lever p fulcrummed at p² in the support q. The upper edges of these cam bars,

page_text: being inclined, will bring the trigger end into action sooner or later in the stroke
of the engine, according to the vertical position of the cam slides o.
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. In a winding engine (or a similar engine) having a steam distribution valve
or valves such as referred to, a cut-off valve attached to the chest or box of the
main steam distribution valve, and controlled automatically, and operated from the
valve gear of the engine; substantially as set forth.
2. In a
winding" or similar engine, the arrangement and combination of parts,
particularly as shewn in and set forth with reference to the drawings.
Dated this 9th day of May 1898.
CHEESBROUGH & ROYSTON,
Applicants' Patent Agents, 15, Water Street, Liverpool.
CHEESBROUGH & ROYSTON,
Applicants' Patent Agents, 15, Water Street, Liverpool.