Automatic Cut-off Gear for Winding and other Engines.
Year: 1893

page_text: Date of Application, 20th Mar., 1893
Complete Specification Left, 22nd Jan., 1894-Accepted, 20th Mar., 1894
PROVISIONAL SPECIFICATION.
Automatic Cut-off Gear for Winding and other Engines.
We, HARRY BOLTON DAGLISH, Engineer, of St. Helens, in the County of
Lancaster, and THOMAS WINDUS, Engineer of the same address, do hereby
deciare the nature of this insation to be at follows-
This invention has reference to automatic cut-off gears or mechanisms for winding
and other engines; but is more particularly applicable to engines with "Cornish
or lift valves for controlling the admission of steam to the cylinders; and in
the following description of our improvements, the invention is applied to an
engine having valves of this kind.
The actuation or operation of the gear or mechanism is effected by, or controlled
by, a governor of any suitable kind driven from the engine, the variations in the
rate of speed of which, act upon the cut off gear through the governor.
In the application of our invention to an engine having "Cornish" or lift
valves, in which said valves are operated by inclines or inclined planes, the said
inclined planes may be provided on a horizontal rul or bar, and adapted to act
in connection with vertical valve rods, the valves being opened when said valve
rods are lifted.
The governor acts in connection with the admission valves through suitable rods
and levers, and rele ing gear or mechanism, by which, when the engine commences
to move at a rate of speed higher than that required, the valves will be closed at
an earlier point or moment in the stroke of the engine, than when running at the
normal speed, say with a load on the engine.
The release mechanism may consist of an inclined plane or planes moved up
and down by the governor, and spring retained catches mounted in levers or
bars, and adapted to engage with, and be disengaged from, the valve rod or part
connected therewith, said levers or bars thereof being actuated by said inclined
plane-.
According to one mode of carrying out this invention, the inclined planes which
work the valve, act upon rollers mounted in a frame, forming part of the
valve rod or connected therewith, the roller and eatch levers above referred to
being mounted upon a common spindle or support, and adapted to move up and
down in said frame. In one form the spindle or support is fixed in a separate
frame or frame bars mounted in the said main frame, and suitably guided at both
ends. The release levers may be arranged outside the frame by hinges at one
end, and having a roller at the other end which works in connection with the
inclined planes actuated or controlled by the governor, the detents being disposed
between the lever ends, and kept up by the springs aforesaid. In action, when the
governor acts or comes into operation, the release levers are acted upon by the
inclined planes, when the valve rods and valves are lifted by the main valve gear,
and the catches or detents are withdrawn from the valve rod frame, and so it is
allowed to fall, thus closing the admission valve. According to the position or
degree to which the inclined planes controlled by the governor are moved, so will
be the degree or point at which the valve rod will be released, and the valve closul.
In the return stroke of the engine, the releasing device is brought back to its
normal position by inclined planes on the underside of the main horizontal
actuating bar acting upon the separate or second frame within or on the said
main frame.
It is to be stated that the invention is not confined strictly to the characteristics

page_text: or construction of mechanisms last described, as these may be modified or equivalents
used to carry out the invention above described.
Dated this 17th day of March 1893.
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicants' Patent Agents.
COMPLETE SPECIFICATION.
Automatic Cut-off Gear for Winding and other Engines.
We, HARRY BOLTON Daglish, Engineer, of St. Helens, in the County of
Lancaster, and THOMAS WINDU, Engineer, of the same address, 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 to automatic cut-off gears or mechanisms for
winding and other engines, but it is more particularly applicable to engines with
"Cornish or lift valves for controlling the admission of steam to the cylinders:
and in the following description of our improvements, the invention is applied to
an engine having valves of this kiel.
The actuation or operation of the gear or mechanism is effected by, or controlled
by, a governor of any suitable kind driven from the engine, the variations in the
rate of speel of which, act upon the cut off gear through the governor.
In the application of our invention to an engine having Cornish or lift valves,
in which said valves are operated by inclines or inclined planes, the said inclined
planes may be provided on a horizontal rod or har, and adapted to act in connection
with vertical valve rods, the valves being opened when said valve rods are lifted.
The governor acts in connection with the admission valves through suitable
rods and levers, and releasing gear or mechanism, by which, when the engine
commences to move at a rate of speed higher than that required, the valves will be
closed at an earlier point or moment in the stroke of the engine than when running
at the normal speed say with a load on the engine.
The release mechanism may consist of an inclined plane or planes moved up and
down by the governor, and spring retained catches mounted in levers or bars, and
adapted to engage with, and be disengaged from, the valve rod or part connected
therewith, said levers or bars thereof being actuated by said inclined plane.
According to one mode of carrying out this invention, the inclined planes which
work the valve, act upon rollers mounted in a frame, forming part of the valve rod
or connected therewith, the roller and catch lever above referred to being
mounted upon a common spindle or support, and adapted to move up and
down in said frame. In one form the spindle or support is fixed in a
separate frame or frame bars mounted in the said main frame and suitably guided
at both ends. The release levers may be arranged outside the frame by hinges at
one end, and having a roller at the other end which works in connection with the
inclined planes actuated or controlled by the governor, the detents being disposed
between the lever ends, and kept up by the springs aforesaid. In action, when the
governor acts or comes into operation, the release levers are acted upon by the
inclined plane, when the valve rods and valves are lifted by the main valve gear,
and the catches or detents are withdrawn from the valve rod frame, and so it is
allowed to fall, thus closing the admission valve. According to the position or
degree to which the inclined planes controlled by the governor are moved, so will be
the degree or point at which the valve rod will be released, and the valve closed.
In the return stroke of the engine, the releasing device is brought back to its
uorinal position by inclined planes on the underside of the main horizontal actuating
bar acting upon the separate or second frame within or on the said main frame.

page_text: It is to be stated that the invention is not confined strictly to the characteristics
or construction of mechanisms last described, as these may be modified or
equivalents used to carry out the invention above described.
Drawings illustrating the invention, the nature of which is above described, are
annexed hereto, and form part of this Specification.
Figure 1 is a side elevation shewing one arrangement according to this invention,
such arrangement being more particularly adaptable to existing engines or forms of
engines. Figures 2, 3 and 4 are end view, and side elevation, and plan, shewing
the same in detail and to a larger scale.
Figure 5 is a side elevation of a modification, shewing the application of the
invention to new engines especially constructed to suit same.
с
Referring to the drawings, and more particularly Figures 1 and 2, a represents
the spindle of a sicami admision valve which works vertically, and say is of the
Cornish or lift type, at one end of the cylinder of the engine; a simii valve f
course existing at the opposite end of the cylinder as usual; and b is the spindle of
one of the exhaust valves. is the frame supporting the valve actuating rod and
the top of the valve actuating gear, and on which the inclined planes or cams for
actuating the valve are supported. d is the said valve actuating rod, it being
worked from the ecrank shaft or other part of the engine in any suitable way; and
e is the inclined plane or cam thereon for operating the admission valve; being
the cam device for operating the exhaust valve. All the above parts are similar to
those which exist in ordinary engines worked with Cornish valves.
is a frame connected to the valve rod a, and through which motion is imparted
to said valve rod, and valve; and is a roller mounted on a pin carried by a
secondary frame lying within the frame h, operated upon by the inclined plans
or cam device e; said frame having at the upper part projections j', which pass
through said frame and have relative movement vertically therein in apertures
formed in the sides thereof, such apertures extending from the level of the lower
edge of the projections to the upper side of the catchics, namely, to the metal on
the under side of the head of the frame has shewn in Figure 2. are the releasing
levers, arranged outside the frame h, and mounted by pins on the projecting
parts of the frame j, and provided at their opposite ends with rollers
catches mounted in the releasing levers and kept in their inward position by the
springs as shewn in Figure 2, such springs being secured on the ends of the
pins and acting on nuts on said catches /. mare inclined planes which work in
connection with the rollers of the rollers k, the said inclined planes being formed
on the double slide m', which is worked by the governor of the engine, said slide
working in suitable guides n on the opposite sides of the frame c. Through this
part of the frame also the guiding spindle of the frame passes.
are
o is a lever fulcrummed at o', and connected with the slide m' at one end, and at
the other to a rod connected with and operated by the governor. This rod pis
adapted to actuate both the releasing mechanisms at the opposite ends of the
cylinders; and for this purpose, the fever o connecting these mechanisms to the
P, meet at the centre of the cylinder between these mechanisms, and their en is
fitting in the hollow head p' of the rod p.
rod
In action, as soon as the engine commences to move beyond the -peed it is desired
to run at, the governor of the engine, acting through the rod and lever 0, will
depress the slide m', and so move the inclined planes downwards. When, then,
either of the admission valves of the engine are lifted through the cam or inclined
device e, a frame is lifted through the roller i, and thus lifts the frame through
the catches, which bear upon the metal at the top of the apertures in the frame /
through the levers k, in which they are mounted; and, accordingly, as the inclines m
are moved more or less down, so will the rollers of the levers meet the inclined
edges of said parts m earlier or Inter, and thereby cause said levers to be pressed
outwards and so withdraw the catches from the frame whereupon such frame,
being released and unsupported, falls down and closes the valve through its valve
roi a.

page_text: On the return of the inclined plane or eam e, the secondary or inner frame j falls,
or is depressed by the portion thereof coming in contact with the lower part
of the frame j, and so bringing down the levers to their normal position in
relation to the frame 4; which, when this position is reached, the spring presses
the catches onto their normal position, engaging with the frame has shown in the
drawings thus the trip antomatic cut off mechanism is ready for the next actuation
and motion of the came.
i
r
The frame of the exhaust valves being of the ordinary type, it is not necessary
to describe their action or construction, further than to say that it is operated by
the cam of the rod d in the usual way.
The arrangement shewn in Figure 5 is a modification of that shewn in
Figures 1 to 4, and shews an engine specially designed as regards the valve gear
portion thereof to suit or have applied to it the herein described invention.
In this case, the frame is lifted when the valve is being opened through a
lever j, fulcrummed at, and having a roller & in its end, in contact with which the
came works, the releasing lever & being of bell crank form, its end acted upon by
the spring serving as a catch, and adapted to be engaged by the lever The
opposite end of the lever is adapted to come in contact with the end of the
inclined har at when the engine governor begins to act. The bars in this case
are worked from the governor through racks in on the bars m, tooth quadrants e,
and racks on the rod p
In action, when an engine commences to run too fast, the bars are thrown by
the governor toward the axes of the valves, and then, when the valve actuating
rod is moved, and the cam e comes in contact with the roller i of the lever j, it
lifts said lever. And such lever being in contact with the catch of the lever k, it
lifts the frame and so lifts the valve; but the inclined end of the bar m being in
the path of the lever k, the end of the lever, 1, is pressed downwards in the lifting
of the frame h, and so removes the catch froin the end of the lever j. The
frame being thus disconnected, from the lever j, falls down and closes the valve.
In the return stroke of the valve rod, the lever j falls a-the cam (recedes from
it, and it is pressed downwards by the projecting piece or came which bear-
upon
the ends of the lever j, and presses it down and under the lower end of the catch 1.
As the bars are pressed further towards the levers, so will the lever & come
carlier into contact with the inclined end of said bar and release the frame h, and
close the steam admission valve earlier in the stroke of the piston. In this figure,
the valve casings A of the admission valves, and the exhaust valve casings B, are
shewn, as are also the steam pipe A' and exhaust pipe B'.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, wo declare that what we
clain is
1. The herein described improvement in automatic cut-off gear, consisting in the
combination of a vertically operated valve, and a cam or similar device for lifting
aml lowering same, of a frame, lever, or part, adapted to be operated by said cam,
and an engaging device adapted to act in connection with said frame, lever, or
part, and to be acted upon or controlled by mechanism actuated by the governor,
whereby, the connection by means of which the said cam lifts the valve, is broken,
and said valve is allowed to return automatically to its closed position, and shut off
admission of steam to the cylinder; substantially as herein described.
2. In automatic cut off gear for engines, the combination with a vertically
operated valve and horizontally operated cam or similar device for actuating said
valve, of a frame n, a frame or lever j, and an engaging and disengaging device or
devices, and lever or arm & connected with said device or devices, and means
such as in operated by the governor, and operating in connection with said arms
or levers operating substantially as in the manner herein set forth with
reference to the drawings, for the purposes specified.
3. The automatic cut off gear having parts constructed, combined, and a lapted

page_text: to operate, particularly as set forth with reference to Figures 1 to 4, and Figure 5,
of the drawings.
Dated this 20th day of January 1894.
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicants' Patent Agents.