Improvements in High Speed Steam Engines and in Valve Mechanism therefor.
Year: 1893

page_text: Date of Application, 30th May, 1893-Accepted, 26th Aug., 1893
COMPLETE SPECIFICATION.
Improvements in High Speed Steam Engines and in Valve
Mechanism therefor.
I, JOSIAH Dow of No. 4571 Pulaski Avenue, Germantown Philadelphia, State
of Pennsylvania, United States of America, 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:-
This invention relates to high speed steam engines of the Corliss type in which
the point of cut off is determined by the governor. The invention consists in the
peculiar construction of a hollow cylindrical and oscillatory valve and in certain
novel features in the construction, arrangement and combination of the valve gear,
cut off and wrist plate connections and governor attachment, all of which will be
hereinafter described.
In the accompanying drawings
Figure 1 is a side elevation of the engine cylinder.
Figure 2 is a vertical longitudinal section of the same showing the steam chest,
exhaust chamber and valves.
Figure 3 is a plan of the underside of the engine cylinder.
Figure 4 is a sectional detail view through the line A. B Figure 3.
Figure 5 is a sectional detail view through the line C-D of Figure 1.
Figure 6 is a central vertical transverse section of the engine cylinder, steam
chest and the steam inlet and outlet.
Figure 7 is a vertical transverse section of the engine cylinder and steam chest,
taken through one of the oscillatory valves.
Figure 8 is a longitudinal section of my improved cylindrical oscillatory valve.
Figure 9 is a transverse section of one end of said valve.
Figure 10 is a view of my improved valve gear and wrist plate connections.
Figure 11 is a view of the valve and cut-off connections with governor
attachment.
Figure 12 shows front and side views of the equalizer attachment.
Similar numerals of reference indicate coriesponding parts throughout the
several figures of the drawings.
Referring to Figures 1 to 7, the numeral 1 designates the engine cylinder which
is formed with a steam chest, chamber or passage 2 directly under and against the
cylinder proper. This steam chest or chamber 2 has on one side of its centre a
steam inlet 3, entering from below, and with which a steam pipe can be suitably
connected. At each end of the steam chest 2 and below the cylinder 1 is a
transversely arranged cylindrical valve-seat 4 each of which communicates through
a port 5 with one end of the cylinder.
The valve 6 15 cylindrical and is arranged to oscillate about its axis in the
manner of a Corliss valve. Steam does not pass over and around this valve 6 but
is admitted into its hollow interior only at the two ends through an annular series
of peripheral openings or ports 7, Figures 8 and 9. Around these ends of the
valves 6 are steam chambers 8 formed in the cylinder casting and communicating
with the steam chest or main steam chamber 2 through passages 9, Figures and t.
The steam chambers 8, about the ends of the valves, have a steam tight
separation from the valve-seats 4, when the valves are in position, by means of
packing rings 10, Figure 7, resting closely around the valves just inside the limits
of said chambers.
Each valve 6 has throughout its length, on one side and between the packing
rings 10, a narrow opening or port 11, Figures 2 and 8 which permits steam to pass
through the interior of the valve into the engine cylinder when the opening or

page_text: port 11 is brought into coincidence with the cylinder port 5, hereinbefore described.
There is also another similar opening 12 through the wall of each valve 6, of about
the same dimensions as the opening 11 but on the opposite side of the valve. This
opening 12 is the "balance port" and has cut away from each side seats to hold
packing strips 13, Figure 2, which strips extend the length of the said opening.
When steam is admitted into the valve its pressure against these packing strips
forces them against their seats and also against the valve seats 4 in the cylinder
casting thereby preventing the steam from passing around the valve.
By this
construction, also, the excess of pressure at one side of the valve, produced by
pressure of the packing strips 13 against the seats 4, serves to hold the valve firmly
against its seat at the cylinder port 5, which it may be observed is for both live
steam and exhaust. No steam, however, actually passes out of the valve through
this "balance port."
In one side of each cylindrical oscillatory valve 6 between its ports 11 and 12, and
like them between the packing rings 10, is a cut away or depressed portion or
pocket 14, which pocket, when the valve is moved in proper position, will have one
side presented to the cylinder port 5 and the other side to an exhaust passage 15
provided in the cylinder casting outside the valve seat, thus forming a channel
through which the exhaust steain passes out to an exhaust chamber or passage 16
having an outlet 17, Figure 6.
It will be observed that the steam chest or main steam chamber 2 covers all the
space adjacent to the cylinder 1 between the inner walls of the two valve seats 4,
one seat being below each end of the cylinder. The steam chest or chamber 2 is
supplied with steam through the inlet 3, entering from below as before mentioned.
At each end the steam chest 2 has two passages 9 leading to the chambers 8
through which the valves 6 are supplied with steam. The main steam chamber 2,
with its passages 9 and auxiliary steam chambers 8, is separated from the walls of
the exhaust chamber 16 by air spaces 18, Figures 2 and 6, the whole being by
preference cast in one piece. The exhaust chamber 16 is beneath the steam chest 2,
as shown in Figure 2 and has its branches or passages 15, at each end, curving
upward and opening into the outer side of each valve seat. The exhaust steam
from the cylinder escaping at one of the cylinder ports 5 passes from either valve
pocket 14 through one of these exhaust passages 15 in to the exhaust chamber 16
whence it finds exit through the outlet 17 before mentioned.
The movements of the valve 6 when in action are, first, a presenting of the
steam opening 11 to the cylinder port 5 at the proper time: then, by action of a
66 cut-off mechanism hereinafter described, or a direct closing, a reversal of move-
ment takes place until the closing of the port and the necessary "lap" are effected:
then a still further movement of the valve is accomplished to bring the exhaust
channel or pocket 14 into proper position with relation to the cylinder poit 5 and
exhaust passage 15, which position, at the proper time, is reversed to a closing
again of the exhaust passage and then on to another presentation of the steam
opening 11 to the cylinder port 5 at the beginning of the next stroke of the
piston 19 in the engine cylinder.
When steam is free to pass directly around and upon a valve of this general
character, thereby holding it to its seat with full force, the pressure and consequent
friction are so great as to expose the valve to considerable wear, besides requiring
the exertion of a large amount of power to move the valve. With this valve.
however, its outside being isolated from the pressure of steam, the excess of
pressure at the "balance port" 12 over that at the opening or port 11, through
which steam is permitted to pass to the cylinder, is only sufficient to hold the valve
closely upon its seat at both steam and exhaust passages, the latter passage being
kept tight by reason of the peculiar construction of the valve in which the steam
opening 11 and alance port 12 although nearly opposite each other are yet far
enough to the side of a direct line away from the exhaust passage to cause the
parallelogram of their combined forces to act sufficiently against the exhaust passage
and hold it firmly in place. By a careful adjustment of these conditions in the

page_text: construction of the valve its whole action is rendered as nearly perfectly balanced
as may be consistent with a firm seat. To avoid or diminish friction a portion of
the outside body of the valve between the steam and balance openings may be
slightly cut away.
In Figure 10 I have illustrated the valve gear and wrist plate connections
through which the movements of the valves 6, as hereinbefore described, are
accomplished. On the outer end of each valve stem 20, is securely fastened an
arm 21, Figure 10, having a pin 22 at its outer end. Attached to and moving
upon this pin 22 is one end of a connecting bar 23 the other end of which holds a
pin 24, which, either directly or through the interposition of a block 25, slides in a
slot 26 formed in the outer end of one arm 27 of a two-armed lever or plate 28 that
is loosely mounted on the valve stem 20, or otherwise so supported as to be capable
of moving freely about its axis yet without itself communicating movement to the
valve. The slotted arm 27 is of somewhat greater length than the valve arm 21,
as shown in Figure 10. To the short arm 29, of the two-armed lever 28, is
pivotally attached one end of a rod 30 the other end of which is pivotally attached
to a wist plate 31 situated above and midway between the two valves. The two-
armed lever 28 has its hub loosely mounted upon the valve stem 20 behind that of
the shorter valve arm 21 which is firmly attached to the valve stem and thus holds
the two-armed lever in place thereon. This arrangement may, however, be varied
without essential difference in the action of the parts. Behind the two-armed
lever 28 is a grooved cut-off plate 32 having a hub which is also free to move about
the axis of the valve stem but need not rest upon it. In the construction shown,
the outer end of the "bonnet" 33, Figure i, is provided with a bearing 34 for the
hub of said cut-off plate. The cut-off plate 32 is provided with a groove or slot 35
that is concentric with the centre of movement of the arms 21, 27 and 29 for a
large part of its length and in this part holds in proper position the pin 24 on the
connecting bar 23 which pin 24 passes through the slot 26 in the arm 27 and into
said groove, thereby permitting movement to be given, through the valve arm 21, to
the valve 6 when the two-armed lever 28 is moved. At a proper position on the cut-off
plate 32 the groove 35 passes by easy transitions to an eccentric aic 36 which has its
radial centre at a distance from the centre of the valve stem 20 exactly equal to that of
the centre of the pin 22 upon the end of the valve arm. The effect of this arrangement
is that as long as the pin 24 upon the connecting bar 23 is held by the concentric part
of the groove the valve can be actuated by movement of the slotted arm 27 of the
two-armed lever 28, but as soon as this pin 24 passes to the arc 36 having its radial
centre coincident to that of the pin 22 upon the valve arm, the connecting bar 23
being of exactly the same length as the radius of the arc of the groove it follows
that the pin 22 upon the valve arm takes the position of the radial centre and the
pin 24 upon the other end of the connecting bar 23 follows the arc, at the same
time passing upward in the slot 26 of the arm 27 and will no longer permit move-
ment of the valve, although the slotted arm passes onward. This arresting of
the movement of the valve is arranged to take place just as the valve has received
its full opening to the cylinder port 5 where it is, by the means described, held
in position until the period for the closing of the valve-for the cut-off-has
arrived; which can be effected simply by moving the grooved cut-off plate back
sufficiently, because the pin 22 on the end of the valve arm 21 must remain in the
radial centre of the arc 36 through which the pin 24 on the outer end of the
connecting bar 23 is moving; but, to make this movement more positive and avoid
all risk of straining the parts or causing "lost motion" there is placed or formed
upon the grooved cut-off plate 32 a spur or projection 37 which may have upon
it a cushion 38 proje ting immediately behind where the end of the valve arm 21
comes to rest in relation to the cut-off plate. Upon the said plate being moved
back in the path from which the opening movement has come this spur 37 presses
upon the end of the valve arm 21 and assists to make sure the closing of the
valve. It will, therefore, be seen that upon the movement of the grooved plate 3:
depends the "cut-off" of the steam, consequently it is called the "cut-off plate."

page_text: When the cut-off plate 32 is moved back-as last described-the pin 24 on the outer
end of the connecting bar 23 may continue to move through the grooved arc 36
to the end of the movement of the slotted arm 27. When its slotted arm takes
its return movement the pin 24 will pass back through the arc and when it reaches
the concentric portion of the groove the bar 23 will act again in drawing the
valve arm 21 with it; therefore, if the return movement of the cut-off plate were
delayed until after this period the slotted arm 27, which controls the main move-
ments of the valve, would of itself, through the connecting bar 23, cause a closing
of the valve in regular course.
The movement of the cut-off plate 32 is made independent of the movement of
the main wrist plate 31 and its connection with the slotted arm. This is accom-
plished by means of a rod 39 having one end pivotally attached to the cut-off plate
and its other end pivotally connected to a quadrant or auxiliary wrist plate 40
movable upon the same axis with the main wrist plate but entirely independent
from it.
The main wrist plate 31 receives its motion by means of a rod 41 connecting
with the free end of a main rocker arm 42, Figure 11 which is situated at the side
of the engine bed; motion being communicated to said rocker arm through a
rod 43 from an eccentric on the main shaft of the engine, not shown.
Swinging on a pin 44 projecting from the upper free end of the main rocker
arm 42 is a slotted link 45 to which near its lower end is pivotally attached a
rod 46 that is connected to a second eccentric on the main shaft the "cut-off
eccentric" not shown.
Between the link 45 and the auxiliary wrist plate 40 is interposed a smaller
rocker arm 47, Figure 11, to the upper or free end of which is pivotally connected
one end of a rod 48 the outer end of which is pivotally connected to a slide
block 49 supported in the slot 50 of the link 45, as shown. Above this second
rocker arm 47 and directly in line with its centre of movement is pivotally
supported the inner or upper end of an equalizer lever 51, Figures 11 and 12,
which has its are of movement intersecting that of the rocker aun. Extending
the entire length of the outer side of this equalizer lever is a groove 2 in which,
either directly, or through the interposition of a block 53 slides a pin 54 which is
secured in the end of the rocker arm 47. Through this pin 54 movement is given
to the equalizer and by its action in the slide groove 52 all the differences arising
from the arcs of movement of the said rocker arm and equalizer are accommodated.
At a fixed point upon the equalizer behind its grooved portion and at such distance
from its centre of movement that it will, when in motion, intersect the arc of
movement of the pin 54 at the outer end of the rocker arm, is placed a pin 55 for
attachment of the connecting rod 56 through which movement is imparted to the
cut-off quadrant or auxilliary wrist plate 40, Figure 10.
It will be seen that from the main eccentric on the engine shaft, acting
through the rod 43, is effected the required movement of the main rocker arm 42
and from it, through the rod 41, movement of the main wrist plate 31 which
in turn by means of the rods 30 in either direction gives movement to the two-
armed levers 28 which through the connections hereinbefore described transmit
movement to the valves through all their necessities of action-admission of steam
to the cylinder-pause, to await cut-off-a taking up of the backward movement
at the proper period-the opening of the exhaust-its closing, and then onward
to the admission of steam again.
The cut-off eccentric" acting through the rod 46 upon one end of the slotted
link 45 while the other end of said link moves with the free end of the main rocker
arm 42 causes sections of the length of the said link from its outer to its inner end,
to pass successively, at progressive periods of the stroke of the engine, across the
cut off line, or the position which causes the cut off to be effected; therefore it will
be seen that the period when the link slide block 49 carrying its connecting rod 48
will reach the cut off line will be determined by the position of said block in the
slotted link 45, a "cut-off" simultaneous with the beginning of the piston stroke

page_text: being effected when the block 49 is held at or near the outer end of the link,
changing through successive periods in the stroke to a position at the inner end of
the link, which will effect the latest cut-off." These positions of the block in the
link are determined by the action of a governor to which the block 49 is connected
by means of a swinging bar 58, Figure 11, which has its upper end attached to a
pin 59 upon a slide block 60 which is caused by the governor to move toward and
away from the lines of motion of the link, the lower end of said bar 58 being
attached to a pin 61 upon the link slide block 49 and the said bar being arranged
to pivot freely upon both pins. To support and balance the block 49 with its
connecting rod 48 and the swinging bar 58 a weight 62 is connected with and
balanced against the slide block 60 to avoid all unnecessary work for the governor
which might otherwise arise from gravity of the parts thus supported; yet the
greatest delicacy of adjustment is permitted from the action of the governor.
As shown in Figure 11, the vertically movable slide block 60 may be arranged
in a slotted guide standard 63 and is connected with the weight or counterbalance 62
by means of a cord 64 passed over a pulley 65 that is journalled in the upper part
of said standard. By means of a system of levers 66, 67 and 63 the slide block 60
is connected with any suitable governor, not shown.
It will be seen that although the link slide block 49 through the peculiar action
of the link 45-which is compounded from action of the two eccentrics-my move
to a further lateral degree at one position of "cut-off" than at another, the relation
of the arcs of movement of the equalizer 51 and its attendant rocker arm 47 is
such that the rod 56, connecting with the "cut-off quadrant" or auxilliary wrist
plate 40 will always receive about the same degree of motion, but being little or
more than just enough to close the valve and cover the "lap" necessary; the
surplus motion when any is transmitted from the link 45 being taken up in the
rocker arm 17 without materially moving the equalizer 51 after a certain distance
beyond the inter-ection of the arcs of motion has been passed. This secures
uniform degree of movement to the cut-off plate 32 with the necessary rapid
movement to carry the valve 6 at the time of cut-off," while the part of the
movement necessary to effect the "lap" of the valve becomes slower and slower
until a rest is reached; the return movement is progressively the same and
simultaneous with the "cut-off" for the opposite valve. In this manner quick
motion is secured at the moment of cut off, and yet there is an entire absence of any
jerk or jar to the parts and only sufficient movement. given to the cut-off plate 32
to accomplish the object desired without in any way disturbing its proper relations
to the movements of the main valve gearing. No matter what the period of
"cut-off," the cut-off plate 32 is always reversed in its movement before reversal of
the slotted arm 27 takes place and the arc portion 36 of the grooved cut-off plate is
always before the slotted arm 27 until the steam port is opened; and it is again in
advance, in reversal, at the time of cut-off, until the connecting bar 23 has its
pin 24 pass from the arc 36 and it then draws the valve arm 21 toward the exhaust
opening.
This valve gear may, without material alteration in construction, be so modified
in its use that instead of connecting to only two valves, each having control over
admission and exhaust of steam, with cut-off, it may be connected to four valves
placed as in the well known Corliss engine, two at the top of the cylinder for
admission of steam and control of the cut-off only and two at the bottom for the
exhaust steam only. In such case the movement from the cut-off quadrant or
auxillary wrist plate 40 an! its appliances will be applied only to the admission
valves while both sets of valves will have their main movements from the main
wrist plate.
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, In a hollow cylindrical oscillatory valve having steam inlets at each end, a

page_text: narrow longitudinally arranged steam outlet or port, a balance port located in the
opposite side of the valve out of direct line with the said steam outlet, and a longi-
tudinally arranged pocket or depression located in the periphery of the valve
between the balance port and steam outlet to serve as an exhaust passage or
channel substantially as described.
2. A hollow cylindrical oscillatory valve, to regulate admission and emission of
steam, having steam inlets only at or near its end-, these being the only portions of
the outside body of the valve immersed or receiving pressure from the steam
passing from the steam chest or passage, the main body of the outside of the valve
being relieved from such contact or pressure, said valve provided with a longitu- 1
dinally arranged steam outlet or port for passage of steam to the engine from within
the valve and a balance port located on the opposite side of the valve, so arranged
that no steam can pass to or away from, the valve through it, said balance port
being adapted to bring pressure to bear against the valve seat and thereby balance
or slightly overbalance, the pressure brought to bear through the outlet or steam 1
port, substantially as described.
3. A hollow cylindrical oscillatory valve having steam inlets only at or near its
ends, a longitudinally arranged steam outlet or port for the passage of steam from
within the valve and a packed balance port adapted and arranged to balance or
slightly overbalance the pressure brought to bear through the steam outlet or port, 2
the outside of said valve between the steam inlets being isolated from steam
pressure, substantially as described.
4. The combination with an engine cylinder having at each end a port for steam
admission and exhaust, and cylindrical valve seats located at said ports, of hollow
cylindrical oscillatory valves each provided at its opposite ends with steam inlets 2
and having a longitudinally arranged steam outlet, or port, a balance port located
in the opposite side of the valve out of direct line with said steam outlet, packing
strips seated in the opposite side of said balance port, and a longitudinally arranged
pocket or depression located in the periphery of the valve between the balance
port and steam outlet to serve as an exhaust passage or channel, substantially as
described.
5. The combination with an engine cylinder, the cylindrical valve seats and ports,
of hollow cylindrical oscillatory valves placed in said seats, the outside of each
valve being isolated from steam pressure, each valve being provided with steam
inlets at the ends only and having a longitudinally arranged steam outlet and a
packed balance port located nearly opposite but out of direct line with said steam
outlet substantially as described.
6. The combination with an engine cylinder, having at each end a port for steam
admission and exhaust, and cylindrical valve seats located separately at each of
said ports, of a hollow cylindrical oscillatory valve placed in each valve seat, said
valve prov ded at its opposite ends with steam inlets and having a longitudinally
arranged steam outlet or port and a longitudinal pocket or depression located in
the periphery of the valve to serve as an exhaust passage or channel substantially
as described.
7. The combination of an engine cylinder, a steam chest or main steam chamber,
auxiliary steam chambers communicating with the steam chest, an exhaust chamber
or passage, cylindrical valve seats communicating with the engine cylinder and
exhaust chamber or passage, and hollow cylindrical oscillating valves placed in the
cylindrical valve seats and having at each end a series of peripherally arranged
steam inlets communicating with the auxilliary steam chambers which surround the
ends of said valves, each valve provided with a longitudinally arranged steam
outlet or port adapted to communicate with a cylinder port and having in its
periphery a longitudinal pocket or depression adapted to serve as an exhaust
channel between the cylinder port and the exhaust chamber substantially as
described.
8. The combination of an engine cylinder, a steam chest or main steam chamber,
auxiliary steam chambers communicating with the steam chest, an exhaust chamber

page_text: or passage, cylindrical valve seats communicating with the engine cylinder and
exhaust chamber or passage, a hollow cylindrical oscillatory valve placed in each
valve seat and adapted to establish and cut off communication between the engine
cylinder and auxiliary steam chambers and between said cylinder and the exhaust
chamber or passage, and packing rings surrounding the valve near its ends between
its steam inlets and outlet whereby its periphery is isolated from steam pressure
substantially as described.
9. The combination with an engine cylinder, steam chambers, and a cylindrical
valve seat, of a hollow cylindrical, oscillatory valve having steam inlets only at or
near its ends and surrounded by the steam chambers, said valve provided with a
longitudinally arranged steam outlet or port intermediate its ends, and packing
rings surrounding the valve near its ends between its steam inlets and outlet,
substantially as described.
10. The combination with a cylindrical oscillatory valve and valve arm rigidly
secured to the valve stem, of an oscillatory plate or lever loosely mounted on the
valve stem, or otherwise so supported as to be capable of moving freely about its
axis, a connection bar having one end pivotally attached to the outer end of the
valve arm and its other end provided with a pin engaged in a slot formed in said
oscillatory plate or lever, a wrist plate, a rod connecting the oscillatory plate or
lever with said wrist plate, and a grooved cut off plate having a portion of its
groove concentric with the valve stem and another portion forming an eccentric
arc, said groove being engaged with the pin on the end of the connecting bar
through which the valve arm is actuated, substantially as described.
11. The combination with a cylindrical oscillatory valve and a valve arm rigidly
secured to the valve stem, of a slotted oscillatory plate or lever loosely mounted on
the same axis with the valve stem, a connecting bar having one end pivotally
attached to the outer end of the valve arm and its other end provided with a pin
engaged in the slotted portion of said plate or lever, a grooved cut off plate having
a portion of its groove concentric with the valve stem and another portion forming
an eccentric arc, said groove being engaged with the pin on the end of the con-
necting bar through which the valve arm is actuated and said cut off plate provided
with a spur projecting immediately behind where the end of the valve arm comes
to rest in relation to the plate, a main wrist plate through which the slotted plate
or lever is actuated and an auxiliary wrist plate through which the cut off plate is
actuated, substantially as described.
12. The combination with a cylindrical oscillatory valve and a valve arm rigidly
secured to the valve stem, of a slotted lever loosely mounted on the same axis with
the valve stem, a grooved cut off plate also loosely mounted on the same axis with
the valve stem and having a portion of its groove concentric with the valve and
another portion forming an eccentric arc, a connecting bar having one end pivotally
attached to the outer end of the valve arm and its other end provided with a pin
passed through the slotted lever and engaged in the groove or cut off plate, a main
wrist plate through which the slotted lever is moved to actuate the valve arm
according to the required movements of the valve and an auxiliary wrist plate
through which the cut off plate is actuated to control the action of the valve arm
independent of the movements of the slotted lever, substantially as described.
13. The combination of a rocker arm actuated from an eccentric rod and
connected with the wrist plate of an engine valve gear, a slotted link carried by
said rocker arm and actuated from the cut off eccentric rod, a block adapted to
slide in the slotted link and sustained by counterbalance mechanism connected with
a govenor, and a cut off mechanism connected with and actuated from the said
block substantially as described.
14. The combination with a cylindrical oscillatory valve, its valve gear and wrist
plate connections, a main rocker arm, a swinging slotted link carried by said rocker
arm and actuated from the cut off eccentric and a block adapted to slide in said
link and sustained by counterbalance mechanism, of a second or auxiliary rocker
arm connected with said block, an equalizer lever pivotally supported adjacent to

page_text: the auxiliary rocker and provided in one side with a longitudinal groove, a pin
carried by the auxiliary rocker arm and engaged in said groove, and cut off
mechanism connected with said equalizer lever, substantially as described.
15. The combination with a cylindrical oscillatory valve, its valve gear and wrist
plate connections, of a main rocker arm actuated from a main eccentric rod, a rod
connecting one end of said rocker arm with a main wrist plate from which the valve
is actuated, a swinging slotted link carried by the main rocker arm and actuated
from the cut off eccentric rod, a slide block supported in the slotted link and
connected with a govenor, a second or auxiliary rocker arm and main wrist plate,
a rod connecting the said auxiliary rocker arm with the link slide block, an
equalizer lever pivotally supported adjacent to the auxiliary rocker arm and having
a varying connection therewith, and a rod connecting said equalizer lever with a
cut off quadrant or auxiliary wrist plate through which is actuated a cut off plate
that controls the action of the valve gear, substantially as described.
16. The combination of a main rocker arm actuated from a main eccentric rod
and connected with the main wrist plate of an engine valve gear, a swinging slotted
link carried by said main rocker arm and actuated from the cut off eccentric rod,
a vertically moveable slide block supported in a slotted guide standard and provided
with a counterbalance weight, a link block adapted to slide in the slot of the
swinging link and connected with said vertically movable slide block by means of a
swinging bar, a governor connected with the slide block, a second or auxiliary
rocker arm intermediate the main rocker arm and main wrist plate, a rod connecting
said auxiliary rocker arm with the link slide block an equalizer lever pivotally
supported adjacent to the auxiliary rocker arm and having a varying connection
therewith, and a rod connecting said equalizer lever with a cut off quadrant or
auxilary wrist plate through which is actuated a cut off plate that controls the
action of the valve gear, substantially as described.
17. The combination with a cylindrical oscillatory valve, its valve gear and
wrist plate connections, of a main rocker arm actuated from a main eccentric rod
and connected with the main wrist plate, a swinging slotted link carried by the
main rocker arm and actuated from the cut off eccentric rod, a block adapted to
slide in the slotted link and controlled by a govenor, a second or auxiliary rocker
arm connected with said block and located intermediate the main rocker arm, and
main wrist plate, an equalizer lever pivotally supported adjacent to the auxiliary
rocker arm and provided in one side with a longitudinal groove engaged with a pin
carried by said auxiliary rocker arm and a rod connecting said equalizer lever with
a cut off quadrant or auxiliary wrist plate through which is actuated a cut off
plate that controls the action of the valve gear, substantially as described.
Dated this 30th day of May 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.