IMPROVEMENTS IN OR APPLICABLE TO LOCOMOTIVE, AND OTHER STEAM ENGINES
Year: 1884

page_text: I FRANCIS WILLIAM WEBB, of Crewc, in the County of Chester, Mechanical
Engineer, do hereby declare the nature of said invention for "IMPROVEMENTS IN
OR APPLICABLE TO LOCOMOTIVE, AND OTHER STEAM ENGINES," to be as follows:-
Firstly, My invention is particularly applicable in combination with my com-
pound three cylinder Locomotive, having two high pressure cylinders exhausting
into one low pressure cylinder, as described in the specification of Letters Patent
granted to me, dated the 16th day of March 1881, and Numbered 1128, but this
part of my invention is also applicable to traction and other stationary or marine
compound steam Engine as it relates to mechanism for effecting the reversing and
adjustment of the valve gear of such steam Engines in such manner that the valve
gear of both the High and Low pressure cylinders will or can be simultaneously
reversed, also allowing the valve gear of either to be separately adjusted when
desired.
My invention consists in the combination and arrangement of mechanism in
which the ordinary arrangement of reversing screw is used as when actuating one
set of valve gear only. This screw does not rotate but only screws in and out of a
tubular screw nut in suitable bearings rotated by a hand wheel.
The end of the screw has bearings for the fulcrum of a beam lever to one end of
which the rod for the high pressure valve gear is jointed, and to the other end of it
the rod for the low pressure valve gear is jointed.
Each end of the beam lever is also jointed or connected with a bar, and these
bars cach extend the lengthway and parallel to the screw, fitting and sliding in
grooves formed for them in the sides of the part or frame containing the bearing
for the screw.
The slide bar for the low pressure valve gear is or may be serrated or corrugated
to suit a block connected with a screw and hand wheel by which the block can be
brought to clamp the slide bar and release it when required.
The slide bar for the high pressure valve gear is acted upon by a lever having
its fulcrum upon the frame part and the end of this lever is acted upon to press
the end of its short arm against the edge of the slide bar, by the end of a screw
rotated by a hand wheel.

page_text: Connected with each slide bar or rod there is a pointer which comes opposite a
suitable index, to show the position of the valve gear whether in forward or
backward gear and to what extent in either.
Both clamping screws are released to leave the slide bars free, when the gear for
both high and low pressure cylinders is to be simultaneously reversed, but when
the low pressure is to be adjusted by turning the screw the slide bar for the high
pressure is first clamped, and vice versa when the high pressure valve gear is to be
adjusted.
In place of the clamping arrangements referred to other equivalent mechanism
may be used, such as serrated blocks to act on serrations on the slide bars, the
blocks being actuated by excentrics on a shaft or shafts partly rotated by a lever
handle which will clamp either slide bar in its extreme positions, but release both
in its middle position, or separate handles may be used.
Secondly. My invention relates to an improved combination and arrangement
of the blast pipe of Locomotives, Traction and other Engines where the exhaust is
used for creating a blast and consists in employing for this purpose a combined
central and annular jet or outlet for the exhaust steam with the chimney formed
into cones or with coues in it, of the proportions suited for obtaining the best
result.
The exhaust steam is allowed to escape as in the ordinary central steam jet, but
in reduced proportion and one or more branch pipes convey a part of the exhaust
steam to an annular chamber from which it escapes through a narrow annular slit;
Both the central and annular steam jets discharge into the same cones, that is, into
the wide end of one cone which unites with the small end of another cone both
cones forming one connected piece.

page_text: I FRANCIS WILLIAM WEBB of Crewe in the County of Chester, Mechanical
Engineer, do hereby declare the nature of said invention for IMPROVEMENTS IN OR
APPLICABLE TO LOCOMOTIVE AND OTHER STEAM ENGINES, and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
Firstly, My invention is particularly applicable in combination with my com-
pound Locomotive as described in the specification of Letters Patent granted to me
dated the 16th day of March 1881 and Numbered 1128 but this part of my
invention is also applicable to traction and other stationary or Marine compound
steam Engines as it relates to mechanism for effecting the reversing and adjustment
of the valve gear of such steam Engines, in such manner that the valve gear of
both the High and Low pressure cylinders will or can be simultaneously reversed
also allowing the valve gear of either to be separately adjusted when desired.
My invention consists in the combination and arrangement of mechanism in
which the ordinary arrangement of reversing screw is used as when actuating one
set of valve gear only. This screw does not rotate but only screws in and out of a
tubular screw nut in suitable bearings rotated by a hand wheel.
The end of the screw has bearings for the fulcrum of a beam lever to one end of
which the rod for the high pressure valve gear is jointed, and to the other end of it
the rod for the low pressure valve gear is jointed.
Each end of the beam lever is also jointed or connected with a bar and these
bars each extend the lengthway and parallel to the screw, fitting and sliding in
grooves formed for them in the sides of the part or frame containing the bearing
for the screw.
The slide bar for the low pressure valve gear is or may be serrated or corrugated
to suit a block connected with a screw and hand wheel by which the block can be
brought to clamp the slide bar and release it when required.
The slide bar for the high pressure valve gear is acted upon by a lever having
its fulcrum upon the frame part and the end of this lever is acted upon to press the
end of its short arm against the edge of the slide bar, by the end of a screw rotated
by a hand wheel.
Connected with each slide bar or rod there is a pointer which comes opposite a
suitable index to show the position of the valve gear whether in forward or
backward gear and to what extent in either.
Both clamping screws are released to leave the slide bars free when the gear for
both high and low pressure cylinders is to be simultaneously reversed but when
the low pressure is to be adjusted by turning the screw the slide bar for the high
pressure is first clamped, and vice versa when the high pressure valve gear is to be
adjusted.
In place of the clamping arrangements referred to, other equivalent mechanism
may be used such as serrated blocks to act on serrations on the slide bars, the
blocks being actuated by excentrics on a shaft or shafts partly rotated by a lever
handle which will clamp either slide bar in its extreme positions, but release both
in its middle position, or separate handles may be used.
Secondly. My invention relates to an improved combination and arrangement of
the blast pipe of Locomotives, Traction and other Engines where the exhaust is
used for creating a blast and consists in employing for this purpose a combined
central and annular jet or outlet for the exhaust steam with the chimney formed
into cones or with cones in it, of the proportions suited for obtaining the best
result.

page_text: The exhaust steam is allowed to escape as in the ordinary central steam jet, but
in reduced proportion and one or more branch pipes convey a part of the exhaust
steam to an annular chamber from which it escapes through a narrow annular slit ;
Both the central and annular steam jets discharge into the same cones, that is, into
the wide end of one cone which unites with the small end of another cone both
cones forming one connected piece.
Fig 1 is a side elevation with part of the covering plate supposed removed fig 2
is an elevation at the hand wheel end, fig 3 is an elevation at the opposite end, and
fig 4 is a plan view of the mechanism forming the subject of the first part of my
invention.
Fig 5 is a sectional elevation showing the ordinary blast pipe and ejector
apparatus, fig 6 a sectional elevation, of the ejector-apparatus at a right angle to
that shown by fig 5 and fig 7 a plan of the underside of the ejector apparatus
forming the subject of the second part of my invention.
a figs 1 and 4 is the hand wheel secured on the end of a tubular screw nut b
having bearings in the frame part or casting c which is secured to the framing of
the Engine.
The tubular screw nut b has a shoulder at one end and lock nuts b¹ at the other
to prevent end movement.
d is the screw, that screws in and out of the tubular screw nut b.
At its outer end it has an eye for a fulcrum pin d¹ by which it is connected with
a beam lever d³, one end of which is jointed with a rod d³ leading to the low
pressure valve gear, and the other end with a rod d' leading to the high pressure
valve gear.
The joint pin d for the low pressure valve gear is also jointed or connected with
a rod do that slides in a recess formed in the face of the casting c, the joint pin
for the high pressure valve gear is also jointed or connected with a slide rod d³
arranged similar to the slide rod do, consequently these rods slide to and fro with
that end of the beam lever d³ with which they are connected.
The edge of the slide rod do is corrugated and there is a block ( having its face
similarly corrugated, which fits a recess in the casting c and is pressed upon by a
screw d having bearings in a part from the casting c this screw d* being rotated
by a hand wheel secured upon it.
There is also another hand wheel screw e having bearings in the casting c the
end of which acts against the end of a lever e¹ in a recess in the casting having its
fulcrum on a pin or projection c³ in or on the casting c and the inner end of this
lever comes against a block e in a recess in the casting which block comes against
the lower edge of the slide rod d³.
The plate c¹ when secured to the casting by screws, covers and retains the slide
bars do and d³, lever c¹ and blocks d and e³ in their places.
Secured to the covering plate c¹ by screws is an angle plate c³ that forms the
index to show the position of each set of valve gear, as thero is a pointer f
and secured to each slide do and d³ and each pointer is bent to point to the
index formed on the upper face of the angle plate c².
Slots are formed in the covering plate ci for the screws to pass through which
secure the pointers fand f¹ to the slide rods do and do these slots also form stops
to limit the movement of the slides.
The mode of operating the mechanism has been hereinbefore described.
In fig 5-a represents a part of the ordinary exhaust pipe-b the ordinary blast
pipe.
Within the chimney or outlet ca casting d is secured which is formed as shown
and to a flange at its lower end a cylindrical part e is secured in such manner that
a cavity el is formed between the cylinder and casting with a narrow annular
slit eat the upper part of the cylinder e between it and the casting d for the
escape of steam from the cavity which is brought to it by two or more pipes f
(four are shown) extending between the exhaust pipe a and the cavity c¹ as shown
best in tig 5.

page_text: In the cavity e¹ and over the inlet from the pipe or pipes f there are pro-
jections d from the casting & which act to deflect the steam discharged by the
pipes and distribute it round the cavity e¹.
It will thus be seen that one part of the exhaust steam escapes as from the
ordinary blast pipe b in the centre and another part escapes round the sides of the
casting as an annular jet at e' the gases from the furnace thus pass into the annular
space between the central and external jets and are expelled from the chimney
along with the steam.
Having now particulary 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,
.1. In a Locomotive or combined Engine Boiler and furnace the combination and
arrangement of mechanism by which two sets of valve gear are actuated so as to
reverse the rotation of the Engine or change the expansive working of the steam
by one screw substantially as hereinbefore described and illustrated by the
drawings.
2. In a Locomotive or Combined Engine Boiler and furnace the combination of a
central and annular orifice for the escape of exhaust steam from the Engine to
produce a blast for the furnace, substantially as hereinbefore described and illustrated
by the drawings.
Dated this twelfth day of Sentember 1801