Improvements in or relating to Valve-gear for "Corliss" and other Motive-power Engines and in Apparatus therefor.
Year: 1899

page_text: Date of Application, 19th May. 1899
Complete Specification Left, 17th Feb., 1900-Accepted, 28th Apr., 1900
Improvements in or relating to Valve-gear for "Corliss" and other
Motive-power Engines and in Apparatus therefor.
I, WALTER MARTIN MUSGRAVE, of the Firm of John Musgrave and Sons,
Limited," Globe Iron Works, Bolton, in the County of Lancaster, Engineers,
Millwrights, Boiler Makers, and Iron Founders, do hereby declare the nature of
my said invention to be as follows:--
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"
"
This invention refers to improvements in or relating to valve-gear for "Corliss
and other motive-power engines and in apparatus therefor and consists in means
for allowing of the same being actuated with full or open steam ports, say,
from 0 to ths of the stroke of the engine by the controlling action of the
governor, between which points of the stroke of the engine the cut off" may
be effected. This I carry into effect by mounting on the Corliss" valve spindles
levers to which are pivoted adjustable rods to the other ends of which are attached
tripping rods or bars or their equivalents extending to the rocking lever suitably
mounted on the side of the cylinder or otherwise; the said rocking lever being
operated by an eccentric and rod from the crank shaft of the engine, or other
convenient part from which a reciprocating motion may be obtained. The adjust-
able tripping bars or rods or their equivalents are provided with specially formed
surfaces against which operate bowls or rollers mounted on levers pivoted to a
fixing or preparation on the side of the cylinder. The last mentioned levers are
connected by adjustable or other rods to a lever or levers mounted on a shaft
or centre actuated by levers and rods coupled in any convenient manner to the
governor. The lever or levers to which are attached the adjustable or other rods
are supported on and operated by a mounted sliding rod actuated to and fro by
an eccentric and rod or their equivalents from the crank shaft or other convenient
part of the engine. The usual "dash-pots" and "snift" valves are provided to
close the steam valves immediately the tripping bars or rods or their equivalents
are released from the rocking lever. The exhaust "Corliss" valves are operated
independently by means of eccentric and rods from any convenient part of the
engine. This invention is equally applicable to what are known as winding
engines for collieries and like purposes and is provided with a hand arrangement
for effecting the "cut-off" from 0 to /ths of the stroke of the engine.
Dated th 1941 day of V 1800
Improvements in or relating to Valve-gear for "Corliss" and other
Motive-power Engines and in Apparatus therefor.
I, WALTER MARTIN MUSGRAVE, of the Firm of John Musgrave and Sons
"Limited," Globe Iron Works, Bolton, in the County of Lancaster, Engineers,

page_text: Millwrights, Boiler Makers, and Iron Founders, do hereby declare the nature of
my said invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:
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This invention refers to improvements in or relating to valve-gear for "Corliss".
and other motive-power engines and in apparatus therefor and consists in means
for allowing of the same being actuated with full or open steam ports, say,
from 0 to /ths of the stroke of the engine by the controlling action of the
governor, between which points of the stroke of the engine the "cut off" may
be effected. This I carry into effect by mounting on the "Corliss" valve spindles
Jevers to which are provided adjustable rods to the other ends of which are attached
tripping rods or bars or their equivalents extending to the rocking lever suitably
mounted on the side of the cylinder or otherwise; the said rocking lever being
operated by an eccentric and rod from the crank shaft of the engine, or other
convenient part from which a reciprocating motion may be obtained. The adjust-
able tripping bars or rods or their equivalents are provided with specially formed
surfaces against which operate bowls or rollers mounted on levers pivoted to a
fixing or preparation on the side of the cylinder. The last mentioned levers are
connected by adjustable or other rods to a lever or levers mounted on a shaft
or centre actuated by levers and rods coupled in any convenient manner to the
governor. The lever or levers to which are attached the adjustable or other rods
are supported on and operated by a mounted sliding rod actuated to and fro by
an eccentric and rod or their equivalents from the crank shaft or other convenient
part of the engine. The usual "dash-pots" and "snift" valves are provided to
close the steam valves immediately the tripping bars or rods or their equivalents
are released from the rocking lever. The exhaust "Corliss" valves are operated
independently by means of eccentric and rods from any convenient part of the
engine. This invention is equally applicable to what are known as winding
engines for collieries and like purposes and is provided with a hand arrangement
for effecting the "cut-off" from 0 to ths of the stroke of the engine.
DESCRIPTION OF DRAWINGS.
Fig. Sheet 1 is a longitudinal elevation of my invention for improvements
in or relating to valve-gear for what are well known as "Corliss" engines. Fig. 2
a plan of Fig. 1. Fig. 3-Sheet 2-a longitudinal elevation of my invention for
improvements in or relating to "Corliss" valve-gear for what are well known as
winding engines for collieries and like purposes wherein the "cut-off" is regulated
by hand by means of the ordinary reversing lever in lieu of a governor. Fig. 4-
Sheet an enlarged front view of rocking lever through line A'B' in Fig. 5.
Fig. 5 a longitudinal side view of Fig. 4. Fig. 6 a plan of Fig. 4. Fig. 7 an
enlarged side elevation of end of tripping rods or bars, and Fig. S a plan of
Fig. 7.
In all the figures the same letters and numerals are employed to indicate
corresponding parts.
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A is the steam cylinder of a "Corliss engine: B foundation plate: C slide-
bars;
1) steam valve-boxes; E exhaust valve-boxes: F rocking lever; G tripping
rods or bars: H eccentric rod; I dash-pots," and J snift-valves."
"
In the steam valve-boxes D are located "Corliss" valves mounted on the valve
spindles K extending through the stuffing-boxes L to the outside the outer ends
of the valve spindles K being supported in the bearings M attached to the valve-
box covers N. On the outer end of each valve spindle K is mounted the lever 0,
.to which is attached the adjustable rod P by means of the pin N*. To the other
end of each adjustable rod P is attached the tripping rod or bar G extending to
and over the upper end of the rocking lever F mounted on the fixing S attached
to the side of the steam cylinder A the fixing S being secured thereto by the
bolts or set screws T or their equivalents. The rocking lever F is provided with
the steel bits a² secured in any convenient manner as shown in Figs. 4, 5 and 6

page_text: on Sheet 3 of the drawings. As the lever F is oscillated to and fro by the
eccentric rod H the steel bits a² operate on the ends a³ of the tripping rods or
bars G in successive order, by which action the latter are operated to open the
Corliss" valves by means of the levers O secured to the valve spindles K. The
upper sides of the tripping rods or bars G extending to and over the upper end of
the rocking lever F are provided with the steel plates at and projections a, the
latter extending into the jaws 16 to prevent the tripping rods or bars G being
forced out of the oscillating path of the rocking lever F by the action of the
"dash-pots" I. Immediately sufficient steam has been admitted to maintain the
speed of the engine the tripping rods or bars G are raised and released from the
steel bits a on the rocking lever F by the action of the bowls or rollers Z mounted
on the levers a and are actuated by the rods e connected to the levers f pivoted by
the pin or centre g attached to the sliding rod operated in the usual manner
by an eccentric and rod from the crank shaft of the engine or other convenient
part where a reciprocating motion may be obtained. The lever is loosely
mounted on the fixing S, being held thereon by the plate F3 secured by the set
screws shown in Fig. 4 on Sheet 3 of the drawings. The rocking lever F is
operated by an eccentric and the rod H from the crank shaft of the engine or
other convenient part from which a reciprocating motion may be obtained. The
end of the eccentric rod H is attached to the rocking lever F by the pin or
centre W. The adjustable tripping rods or bars G or their equivalents are
provided with the specially formed surfaces X against which operate the bowls
or rollers Z mounted on the levers a, pivoted by the pins or centres b' to the fixing
or bracket S¹ attached to or suspended from the underside of the "dash-pot” I.
The levers are connected by the pins or centres d to the adjustable or other
rods ; the other ends of the latter connecting with the levers f mounted on the
loose centre g attached to the sliding rod mounted in the bearing on the
fixing secured to the foundation plate B by the bolts or set screws 7. On the
centre carrying the compound levers f is mounted the lever m which is con-
nected to the lever o by the rod and pins ; the levers o and being mounted on
the centre in the fixing k. The end of the lever r is connected to the
governor for regulating the speed of the engine by the rod p. The "dash-
pots" I are provided internally with pistons in the usual manner, being attached
to the ends of the rods W extending through the stuffing-boxes X to the upper
ends of the levers 0, being secured thereto by the pins or centres Y. In adapting
this invention to what are known as winding engines for collieries and like
purposes the apparatus for connecting the valve-gear to the "governor" is
dispensed with and is substituted by connecting the lever m to the reversing lever or
handle g by the rods s, y and levers we, as shown in Fig. 3. The reversing handle
or lever is mounted is mounted on the centre in the fixing 12. The reversing
lever or handle q is provided with the "trigger-lever" c, rod d, and slide el; the
latter being secured to the side of the lever or handle by the clip
slide el operates in conjunction with the slots f' in the quadrant g' to allow of the
"Corliss" gear being set to any desired position to effect the necessary "cut-off"
and for throwing the "cut-off" gear in and out of action according to the demands
required during the operations of winding up and down the "shaft" of a colliery
or other similar place.
66
י
The
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:-
1. The general arrangement, construction, and combination of parts composing
my improvements in or relating to valve-gear for steam engines with Corliss'
valves and in apparatus therefor, the whole being applied and operating substan-
tially as described and as illustrated in Figs. 1 and 2 on Sheet 1; Fig. 3 on
Sheet 2, and Figs. 4 to 8 inclusive on Sheet 3 of the drawings.
2. In combination with valve-gear for steam engines with "Corliss" valves the

page_text: C
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use of the tripping rods or bars G provided with the specially formed surfaces X
with which operate the bowls or rollers Z mounted on the levers a actuated by
the rods and levers f on the centre g attached to the sliding rod h; the bowls or
rollers being regulated to effect the cut-off" automatically by means of the
levers mo and r and the rods and p connecting the same to the "governor,"
the whole being constructed, applied, and operating, substantially as described
and as illustrated in Figs. 1 and 2 on Sheet 1 of the drawings.
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3. In combination with valve-gear for winding engines for collieries and like
purposes with Corliss" valves the use of the tripping rods or bars G provided
with the specially formed surfaces X with which operate the bowls or rollers Z
mounted on the levers a actuated by the rods e and levers f on the centre g attached
to the sliding rod h; the bowls or rollers % being regulated to effect the
off" by hand by means of the levers ma¹, and the rods s and y connecting the
same to the hand lever g, the whole being constructed, applied, and operating
substantially as described and as illustrated in Fig. 3 on Sheet 2 of the drawings.
Dated the 16th day of February 1900.
cut-
EDMUND CHADWICK,
Agent.