Year: 1887

page_text: Date of Application, 11th Feb., 1887
Complete Left, 9th Nov., 1887
Complete Accepted, 9th Dec., 1887
I JOHN TICKLE carrying on business as an Engineer, Brass and Iron Founder at
the Providence Engine Works, 75 John Street, West Bromwich, in the County of
Stafford do hereby declare the nature of this invention to be as follows:-
My Invention consists of the construction hereinafter described, of Gearing to be
used on Steam Engines, so adapted to cut off the supply of Steam to the Cylinder at
whatever power the Engine may be required to work.
I will first describe how my Invention is applied to Horizontal Steam Engines,
and it will be necessary for me to state further details than what I claim for my
Invention in order to explain the working of the said Invention.
The Steam Cylinder will be made with two Slide Valves, viz. one at each end of
the Cylinder, in separate Steam Chests, on the back of each Steam Chest, will be
fixed a double Beat Valve with Lifting Gearing above, through which is placed a
Horizontal Revolving Shaft which is driven by Mitre Wheels from the Governor
Spindle. On this Shaft are two Lifting Cams, which raise the double Beat Valves,
and thus admit the requisite volume of Steam into the Steam Chests. These Cams
are made with a quick termination to the Lift, to allow the Valves to drop suddenly.
To admit the varying volumes of Steam as required, the Cams are moved backward
and forward thus allowing the double Beat Valves to close at the different points of
the stroke of the Engine.
I will now describe how the backward and forward movements of the Cams are
affected viz. by means of pendulum Governors fixed over the Engine Shaft with a
hollow vertical Spindle, made with rack quadrants at the top end of the Levers,
which work into an inner Spindle, thereby giving an upward and downward
movement to it as the Governors close and open.

page_text: The Governors are driven by Mitre Wheels from the Engine Shaft. The Horizontal
Shaft upon which the Cams are fixed is driven by Mitre Wheels from the Governor
Spindle. The Mitre Wheel on the Governor Spindle has on the back of it inclined
clutches, similar to a screw movement and working into these inclined clutches are
two exactly similar attached to a Sliding Box which is cottered to the inner Spindle.
This Spindle working up and down as I have before described, by the action of these
inclined clutches, the Mitre Wheels are set forward or backward thus giving the
same action to the Shaft and Lifting Cams with the result as herein before described.
I claim for my Invention, the action of the inclined clutches, the backward and
forward movement of the Horizontal Shaft and the action of the Lifting Cams.
It is applied to Vertical Engines in a similar way, with the exception of a vertical
Shaft instead of a Horizontal one.
COMPLETE SPECIFICATION.
An Improved Automatic Expansive Gear for Steam Engines.
I, JOHN TICKLE carrying on business as an Engineer, Brass, and Ironfounder at
the Providence Engine Works, 75 John Street, West Bromwich, in the County of
Stafford do hereby declare the nature of my invention for AN IMPROVED AUTOMATIC
EXPANSIVE GEAR FOR STEAM ENGINES and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
My Invention consists of the construction hereinafter described of Gearing to be
used on Steam Engines so adapted to cut off the supply of Steam to the Cylinder at
whatever power the Engine may be required to work.
I will first describe how my Invention is applied to Horizontal Steam Engines,
and it will be necessary to state further details, than what I claim for my Invention,
in order to explain the working of the said Invention.
The Steam Cylinder will be made with two Slide Valves, viz., one at each end of
the Cylinder, in separate Steam Chests, on the back of each Steam Chest, will be
fixed a Double Beat Valve, with Lifting Gearing above through which is placed a
Horizontal Revolving Shaft which is driven by Mitre Wheels from the Governor
Spindle, on the Shaft are two Lifting Cams, which raise the Double Beat Valves and
thus admits the requisite volumes of Steam, into the Steam Chests, these Cams are

page_text: made with a quick termination to the lift to allow the valves to drop suddenly, and
to admit the varying volumes of steam as required the Cams are moved, backwards
and forwards thus allowing the Double Beat Valves, to close at the different points
of the stroke of the Engine.
I will now describe how the backward and forward movement of the Cams are
effected, viz., by means of Pendulum Governors, fixed over the Engine Shaft, with a
Hollow Vertical Spindle, and made with Rack Quadrants at the top end of the
Levers, which work into an inner Spindle, thereby giving an upward and downward
movement to it as the Governors close and open. The Governors are driven by
Mitre Wheels from the Engine Shaft, the Horizontal Shaft upon which the Cams are
fixed is driven by Mitre Wheels from the Governor Spindle, the Mitre Wheel on the
Governor Spindle, has on the back of it Inclined Clutches, similar to a screw movement
and working into these Inclined Clutches are two exactly similar, attached to a Sliding
Box, which is cottered to the Inner Spindle this Spindle working up and down as I
have before described, by the action of these Inclined Clutches the Mitre Wheels are
set forward or backward, thus giving the same action to the Shaft, and Lifting Cams
with the result as hereinbefore described.
I will now describe with reference to the accompanying Drawings the manner in
which my Invention is to be performed.
Fig. 1 represents in Elevation the Governor Arms down, with the Inclined Clutches,
open or at their highest position, also shewing the Balance Gear, by which the speed
of the Engine is determined. Fig. 2, represents in Elevation and Fig. 3 in Plan, the
Governor Arms open to their full extent, with the Inclined Clutches closed, or, at
their lowest position, and the manner in which the Horizontal Shaft works from the
Governors Fig. 4 represents in Vertical Section to a larger scale, the Double Bat
Valves with the Lifting Cams, in position for lifting, when the Governor Arms
down as shewn in Fig. 1. Fig. 5 represents in Vertical Section to a larger scare,
the Double Beat Valves, with the lifting Cams in position for lifting when the
Governor Arms are open full, as shewn in Fig. 2 & 3. Fig. 6. represents partly in
Vertical Section and partly in Elevation, to a larger scale the action of the Governors.
Fig. 7, represents in actual size, the Inclined Clutches open or at their highest
position.
The same letters of reference, indicate the same parts in Figures 1 to 7 both
inclusive.
c is the
a. is the Steam Cylinder, with a Slide Valve at each end, in separate Steam
Chests, a², a³, (see Fig. 3). 1, 63 are the two Double Beat Valves, with Lifting
Gear 3 above, being fixed on the back of the Steam Chests a² a³.
Horizontal Shaft being fixed through the said Lifting Gear 636 and is driven by
the Mitre Wheels d. d² (see Figs. 1, 2, 3, &. 6.) the said Shaft c. is fitted with two
Lifting Cams c² 3 which raise the two Double Beat Valves b. 62 alternately, thus
admitting the requisite volumes of steam into the Steam Chests a², a³ alternately, the
said Lifting Cams, c² c³, have a quick termination to the lift, to allow the Double
Beat Valves b. 2 to drop suddenly, (see Figs. 2, 3, 4, 5,) also the said Cam c³, being
at its backward position when the Governor Arms gg2 are down as shewn in Fig. 1,
thus admitting steam for just over half the length of the stroke of the Engine, (see
Fig. 4), and the said Cain c³ also being at its forward position when the Governor
Arms g² ², are open as shewn in Figs. 2. 3, thus admitting steam for one tenth, of
the length of the stroke of the Engine (see Fig. 5), and any varying distances
between one tenth, and half the length of the stroke of the Engine, as the Governor
Arms g² ² rise and fall. The Governor Spindle g. is revolved by the Mitre
Wheels, e. e fixed on the Engine Shaft and the Governor Spindle g, the Governor
Arms 22, have toothed Quadrants gg, radiate and hang from the centres g³ g³,
and work into the Inner Toothed Spindle. A. thereby giving the downward and
upward movement to the said Inner Toothed Spindle h, as the Governor Arms g² g²
rise and fall (see Fig. 1. 2. 3. 6, to the said Inner Toothed Spindle his cottered the
sliding Inclined Clutch i, the said Inclined Clutch i. sliding up and down the
Governor Spindle. g. upon the keys g³ g³ and working into the Inclined Clutch d³
3

page_text: upon the back of the Mitre Wheel. d. the said Mitre Wheel d working loose upon the
Governor Spindle
g. thereby moving backwards & forwards the Horizontal
Shaft C, and Cams 2 c with the results herein before described (see Fig. 1. 2. 3. 6)
the Collar sustains the Mitre Wheel d, in its right position see Fig. 1. 2. 6, the
Balance Gearing is for the purpose of running the Engine at any desired speed by
adding Weights to increase, and taking same away to decrease speed.
I will now describe the Automatic action of the Gear, the Mitre Wheels. e. e²
revolve the Governor Spindle g. the Governor Arms, g², g², rise and fall as the speed
of the Engine increases and decreases thus depressing or raising the Inner Toothed
Spindle h. thereby giving the same action to the Inclined Clutch i. which works into
the Inclined Clutch d³, and so forces the Mitre Wheel d. backwards and forwards
round the Governor Spindle g. thus giving the backward and forward movement, to
the Mitre Wheel de which communicates the same action to the Lifting Cams c²,
and cutting off the supply of steam to the Cylinder at whatever power the Engine is
required to work (see Fig. 1. 2. 3. 4. 5. 6. 7.
My Invention is applied to Vertical Engines in a similar way with the exception
of having a Vertical Shaft instead of a Horizontal.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is
Of an Improved Automatic Expansive Gear for Steam Engines.
Firstly. The combination and action of the Inclined Clutches, i, d³ as hereinbefore
described and illustrated in the accompanying drawings.
Secondly. The combination and action of the Horizontal Shaft c as hereinbefore
described and illustrated in the accompanying drawings.
Thirdly. The combination and action of the Lifting Cams, c, c³, as herein before
described and illustrated in the accompanying drawings.
Dated this Ninth day of November 1887.
,