Improvements in or Applicable to Compound Locomotives where the Wheels Driven by the High are Uncoupled with the Wheels Driven by the Low Pressure Cylinder or Cylinders.
Year: 1889

page_text: Date of Application, 14th Jan., 1889
Complete Specification Left, 9th Oct., 1889-Accepted 9th Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in or Applicable to Compound Locomotives where
the Wheels Driven by the High are Uncoupled with the
Wheels Driven by the Low Pressure Cylinder or Cylinders.
I, FRANCIS WILLIAM WEBB, of Crewe, in the County of Chester, Mechanical
Engineer, do hereby declare the nature of the said invention, to be as follows :-
I find that in the class of Compound Locomotives for which Letters Patent were
granted to me No. 1128-1881 where the wheels driven by the high pressure cylinders
are uncoupled with the wheels driven by the low pressure cylinder or cylinders, that
the expansion gear hitherto used for the low pressure cylinder or cylinders may be
dispensed with, and the Engine greatly simplified by applying and using any
suitable automatic reversing valve gear for the low pressure cylinder or cylinders such
as a single excentric which can rotate to a certain extent on the driven axle and thus
change its position automatically when the Engine is moved in either direction by the
power of the high pressure cylinders. The valve is connected with the automatic
mechanism giving it motion by a rod and lever or arm on a shaft in bearings on the
framing which has another lever or arm connected with the valve rod working the
spindle of the valve or valves. When two valves are used two sets of gear are
required.
I combine with the lever or arm a joint pin for the excentric rod, which joint pin
is or may be adjusted by a screw, or by a shaft geared therewith taken to a convenient
position on the locomotive-the object of this arrangement being to adjust the stroke
of the valve, if required.
In some cases I use or may use arrangements by which the valve mechanism is
disconnected from the excentric, or its equivalent, and may then be worked by hand,
such as that used in the well known "Gab" reversing gear.
T
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PETER J. LIVSEY,
A
COMPLETE SPECIFICATION.
Improvements in or Applicable to Compound Locomotives where
the Wheels Driven by the High are Uncoupled with the
Wheels Driven by the Low Pressure Cylinder or Cylinders.
I, FRANCIS WILLIAM WERB, of Crewe, in the County of Chester, Mechanical
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 :-
I find that in the class of Compound Locomotives for which Letters Patent were
granted to me No. 1128-1881 where the wheels driven by the high pressure
cylinders are uncoupled with the wheels driven by the low pressure cylinder or
cylinders, that the expansion gear bitherto used for the low pressure cylinder
or cylinders may be dispensed with, and the Engine greatly simplified by applying
and using any suitable automatic reversing valve gear for the low pressure cylinder
or cylinders such as a single excentric which can rotate to a certain extent on
the driven axle and thus change its position automatically when the Engine is
moved in either direction by the power of the high pressure cylinders.
The valve is connected with the automatic mechanism giving it motion by a rod
and lever or arm on a shaft in bearings on the framing which has another lever or
arm connected with the valve rod working the spindle of the valve or valves. When
two valves are used two sets of gear are required.

page_text: I combine with the lever or arm a joint pin for the excentric rod which joint pin
is or may be adjusted by a screw, or by a shaft geared therewith, taken to a convenient
position on the locomotive the object of this arrangement being to adjust the stroke
of the valve if required.
In some cases I use or may use arrangements by which the valve mechanism is
disconnected from the excentric or its equivalent and may then be worked by hand,
such as that used in the well known "Gab" reversing gear.
Fig. 1 is a longitudinal elevation partly in section showing the inside or low
pressure cylinder and some connected mechanism of a three cylinder Compound
Engine according to my aforesaid invention, and Fig. 2 is a plan view of the
same.
The outside cylinders and the reversing and expansion gear for their valves are or
may be of the ordinary construction and arrangement as explained in my aforesaid
specification of Letters Patent No. 1128-1881, and as my present invention only
relates to the valve mechanism of the low pressure cylinder or cylinders (where two
are used) the above drawings will sufficiently illustrate my invention.
a, is the cylinder, with an ordinary slide valve b; 61, the spindle of the slide valve
working through the stuffing box; 6, is a rod jointed at one end to the valve spindle
and at the other end to one end of a lever or arm c, on a shaft c', in suitable bearings
of the framing d.
The other arm of the lover c, on the opposite side of the shaft c', is jointed to one
end of an excentric rod e', which is connected with the single excentric e, employed
for working the valve.
This excentric e, is not fast upon the crank axle, of the driving wheels f¹, but. can
rotate to a given extent upon it which is limited by a slot e, in the excentric,
concentric with the axle, and a pin e³, which may be fitted in a disc or part secured
to the axle f, but as shown, one end of this pin e³, is secured in one arm of the
crank, and its other end comes into the concentric slot e².
The crank axle may be made in the ordinary manner, but as shown in figs. 1 and 2
the crank part, is mado separate, with a counter-balance part, on that side of the
axle, opposite the crank bearing f, and the crank part is bored out and the axlo f,
is passed through it and firmly secured and then that part of the axle between the
crank arms is, cut away.
round
It will now be seen that when the Engine is started and the wheels f¹, rotate in
the direction pointed by the curved arrow on fig. 1, that the pin e, will come against
one end of the concentric slot e, as shown in fig. 1, and carry the excentric
with it, the excentric being then in the correct position for working the valves
properly for that direction of the Engine.
e
If now the Engine is reversed and notion is given by the wheels driven by the
high pressure cylinders, to move the wheels f¹, indicated in figs. 1 and 2 in the reverse
direction to that pointed by the curved arrow on fig. 1, the excontric e, will stand or
remain motionless until the pin e³, has moved to the opposite end of the concentric
slot e³, when the pin will begin to rotate the excentric in the reverse direction, the
position of the excentric being then correct for properly working the valve, for that
direction of the Engine.
When two low pressure cylinders are used in place of one, a duplicate of the valve
mechanism described will be used for the second cylinder.
If desired the excentric rod e', may be jointed to the arm of the lever c, (see fig. 3)
so that its distance to and from the axis of the shaft c¹, may be increased or
diminished to adjust and vary the throw of the slide valve b, when the Engine is
stationary, by a screw c³, screwing through a slide block c³, which is arranged to
slide in a slot c, in the lever c, as shown in fig. 3.
'
When an arrangement is required that will allow of adjustment say from the
foot plate of the Engine either when it is in motion or stationary that illustrated
by fig. 4 is or may be used, which is the same as that shown by fig. 3, except
that the screw c, is dispensed with and one end of a link c", is jointed with the
rod e', and the other with one arm co, of a bell crank lever or with one arm c³, on a

page_text: shaft with two arms, which bell crank lever or shaft with two arms has its fulcrum c³,
in suitable bearings on the framing. The other arm c³, of the bell crank lever or
shaft is jointed to one end of a rod c, the other end of which is or may be screwed
to pass through a screw tapped wheel in suitable bearings on the framing by
rotating which the position of the block c³, in the slot of the arm c, may he
adjusted.
A lever or other mechanism may be used for actuating the rod c³, I have referred
to my compound Locomotives, as having the high pressure cylinders outside and
the low pressure cylinder or cylinders inside, but these positions may be reversed ;
the low pressure may be outside and the high pressure cylinders inside the framing.
I have shown in the illustrations a rocking shaft c¹, between the excentric rod e¹,
and a rod 62, connected with the valve spindle 6', but in some cases the rocking shaft
may be dispensed with, and the excentric rod connected directly with the valve
spindle b¹.
I have also shown and described the excentric e, as being connected with the axle f
by means of a pin e, and concentric slot e³, but any suitable stop may be used arranged
to allow the excentric the required movement upon the shaft.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is.
1. In compound Locomotives where a pair of cylinders drive one axle, and a single
cylinder or pair of low pressure cylinders drive another axle, uncoupled with the axle
driven by the other pair of cylinders, the combination therewith of automatic
reversing gear for the valve or valves of the low pressure cylinder or cylinders
substantially as hereinbefore described and illustrated by the drawings.
2. The combination and arrangement of automatic reversing gear for the valve or
valves of the low pressure cylinder or cylinders of compound Locomotive Engines,
acting independently of the high pressure cylinders substantially as and for the
purpose hereinbefore described and illustrated by the drawings.
Dated this Eighth day of October 1889.
TETER J. LIVEL
Agent.