Improvements in Rotary Engines.
Year: 1899

page_text: Date of Application, 5th Apr., 1899-Accepted, 28th Oct., .1899
COMPLETE SPECIFICATION.
Improvements in Rotary Engines.
I, WORCESTER HADDOCK, of 1223, Bremen Street, Cincinnati, in the County
of Hamilton and. State of Ohio,, United States of America, Engineer,, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
-
In the accompanying drawings making a part of this specification,-
Figure 1 is an elevation of the front of the engine, and showing the cam
for operating the valve B, and also showing mechanism for reversing the valve,
and thus reversing the engine.
Figure 2 represents an elevation of the rear of the engine and the mechanism
for operating the valve E. Figure 3 is an elevation of a vertical central cross
section, taken in the plane of the dotted line 3, 3, of Figure 4, that face of the
section being seen which faces toward the front.
Figure 4 shows a vertical central section taken in the plane of the dotted
line 4, 4, of Figure 1, that face of the section being seen which faces toward
the right in Figure 1.
Figure 5 is a view on a scale less than that upon which Figures 1 to 4 are
made. Figure 5 is a view of a portion of the inner side of that part of the
engine which lies to the left of the plane of the dotted line 5, 5, of Figure 4..
Figure 6 is a view of the means for rendering the valve or stopple which
elastically closes the exit for steam from the steam cushion more or less yielding
as desired. This figure is on an enlarged scale.
Figure 7 is a view in perspective of the upper end of the cam rod and of the
latch combined therewith for hooking (locking) together the rocking device and
the cam rod.
Figure 8 is a sectional view of the abutment valve on a scale somewhat
larger than that of Figures 1 to 4.
Figure 9 represents a side elevation of the valve E.
Figure 10 is a detailed view of one of the sets of wrist, collar and stud, for
enabling the adjacent arm of the rocking device to be securely fastened to the
cam rod.
I will now proceed to specify my invention in detail. I will first describe the
interior parts of my engine. In connection with the inlet steam pipe for deliver-
ing steam to the engine, there is (in the cylinder or casing of the engine), the
inlet port A, preferably preceded by a chamber A2 whose bottom parts converge
downward to the port A. Next the port A is the receiving, cut off and reversing
valve B rotable in its closely fitting chamber B2, in the cylinder or casing of
the engine. This valve B is fixed on its rotable shaft B3. This valve is not
moved more than a short portion of the arc of a revolution, as will be soon
hereinafter apparent. This valve has two ports passing through it, viz.: RC
and LC. The cylinder or casing below has two stationary ports RD and LD,
and the ports of the valve B are arranged substantially as shown, so that when
the upper end of inlet port LC connects with the inlet port A, the lower end of
the port LC will be in connection with the upper end of the port LD,and
when the upper end of the inlet port RC connects with the inlet port A, the
lower end of this port RC will be in connection with the upper end of the
port R D. Below the ports LD and RD is the abutment receiving valve E,
adapted to oscillate with and by its shaft E³. In the working portion of this
abutment valve E, the upper part has a convexly curved face E¹, which bears

page_text: against the concavely curved face D2 of the cylinder of casing. The bottom
portion of this valve has a long recess E³, bounded at each end by a wing E of
the valve. Each of these wings is preferably formed as shown between flanges a
at ends of the valve, and consists of a downward portion E. and a horizontal
portion E, the latter turning outward from the vertical line of the valve. The
outer ends of each of these wings are curved to accommodate themselves to the
adjacent curved surface of the valve chamber U, wherein this valve works.
There are in this valve spaces E7, E7, respectively located on opposite sides of
the valve E and arranged above their respective adjacent valve wings E,, so as
to aid in the conveyance of exhaust steam to the exhaust. Outlets G of the
exhaust are duly shown, respectively located on opposite sides of the engine, and
of the abutment valve E. This valve is provided with two receiving ports RH
and LH, running through it from bottom to top. This valve may be solid
except at its ports or be lightened by three chambers Es cast or otherwise formed
therein.
The engine has a cylinder L. Within the latter is a rotary piston J, having a
piston abutment J. The piston is concentric with the cylinder except at the
abutment J. Between the cylinder and the piston is the steam space K. The
piston abutment is provided with suitable packing. A preferred description
of such packing and its mode of combination with the cylinder is as follows:-
The abutment J2 has a recess J³, in which lies a metallic packing J4, fitted to
reciprocate in said recess. This packing J is held up against the inner
peripheral face of the cylinder (viz.: the outer surface of the steam space K),
by a spring or springs J5 located in a recess Je below the recess J³, but extending
up into the latter recess and pressing against the inner edge of the packing J.
A suitable adjustable stop or stops prevent the spring from pushing the packing
out beyond the point required for its impingement. on the surface of the
cylinder. The ports RH and LH of the abutment valve E are arranged sub-
stantially as shown so that when the upper end of the port LH is in connection
with the lower end of port LD the foot E of the left hand wing Et rests upon
the periphery of the rotary piston J and the left hand passage E7 of valve E
is in connection with the steam space K around the piston and within the
cylinder L and in front of the piston abutment J2, and on the other hand, when
the upper end of the port R H is in connection with the lower end of the port RD,
the foot of the right hand wing E rests upon the periphery of the rotary
piston J, and the right hand passage space E of the valve E is in connection
with the steam space K and in rear of the piston abutment 12. A device for
moving, or tripping the valve E is present within the cylinder L, and attached
to the piston. It consists of the inclines J7, J7, located respectively on each side
of the piston abutment J2, and beginning at the surface of the piston J and lead-
ing up to the outer or free end of the abutment J2. The number of pairs of
these inclines J' may be increased or diminished, as needed.
In order to prevent the valve E, after being thrown over and when moving
toward its resting point from seating hard on the periphery of the piston, and
thus wearing the parts faster than they would otherwise be worn, I provide
cushioning devices, and the preferred description thereof, also of my invention,
is as follows: I provide the valve E on each side with a wing or flange E, form-
ing on each side in connection with the valve box, a chamber E10, varying in size
as the valve E moves. At the upper end of the chamber E10 on the left hand is
located an escape opening for the compressed steam, when the pressure of the
latter becomes too great. This escape is through an opening F, in the inner face
of the cylinder head L2, communicating with an oblique passage 3 of the latter,
in turn connecting with the exhaust G substantially as indicated. This passage F2
is preferably present as a groove in the inner side of the cylinder heads, that is,
valve cover, which is next to the opening F. The opening F is closed by a
valve F3. When the steam pressure in chamber E10 becomes too great, it presses
back the valve F³ and finds exit through the passage F2 into the exhaust. The

page_text: degree of pressure with which the valve F3 bears upon its valve seat is duly
regulated by means of a screw F5 screwed into the boss on the cylinder head
and bearing against the inner end of the screw and compressing the latter
between it and the valve. A stem F6 is fixed to the valve F³. There is a collar F
on the valve F3 and stem F, which collar prevents the valve under pressure of
spring F from advancing in to the cushion chamber of valve E. This stem
operates as a guide to keep the valve F3 in place, and to retain the spring in
place on the valve collar. A screw F5 engages a screw thread in the boss afore-
mentioned, and against this screw the outer end of this spring F' rests. Advanc-
ing the screw toward and against the spring F increases the pressure of this
spring upon the valve F3 and requires greater pressure of the compressed steam
to open the valve F3 for enabling the steam to exhaust through passage F2 and
on into the exhaust opening G, and for enabling the valve E to come more
gently to its seat.
It will be understood that a construction similar to that of the parts F, F2, F3.
F, F5 and F6, already described is present at the other side of the cylinder, and
is there efficient in providing, in combination with the adjacent chamber E10
of valve E, a cushioning device to prevent the valve E from seating itself too
hard, when its right or left hand wing is being seated on the periphery of the
piston.
Steam to act as a cushion in that chamber E10 which must necessarily be the
one to cause the descent of the wing next to be seated, is admitted to that
chamber, through a branch port B4, leading from the adjacent receiving port LH
or RH, as the case may be, to the adjacent chamber E10. It matters not there-
fore which wing of the valve is being seated, there is a cushioning device present
which prevents that wing from seating hard.
The description has now advanced sufficiently far to describe in a connected
Such opera-
manner, the mode in which these interior parts operate and coact.
tion is as follows:-The valve B is first turned so as to cause the engine to
rotate in the desired direction. Thus when the piston is to rotate in the
direction of the arrow Z, the valve E takes the position shown in Figure 3.
The valve B having the position shown in this figure, steam coming in through
the inlet port A passes through port LC and thence through port LD, and
then through port LH and entering steam space K of cylinder L. courses to
the right and then down around the piston, and the abutment J2 pushes it
forward in the direction indicated by the arrow Z. It will be understood that
the steam acts between the left hand wing E, as an abutment temporarily,
stationary, on the one hand, and the abutment J2 on the other.
When the piston is approaching the valve E, the adjacent incline flanges J7
preceding the piston abutment gradually lift the left hand wing E of the
valve E, so that the right hand wing Et of the valve seats upon the periphery of
the piston. Steam is now cut off from the valve E and steam space K. and the
right hand space E is connected with steam space K (behind or to the left of
the piston) and the steam in the latter is exhausted therefrom into the adjacent
exhaust G. The momentum of the piston carries its abutment J2 under the
uplifted left hand wing of the valve E. The incline J7 in front of the still
rotating piston now lifts the right hand wing of the valve and returns the left
hand to its first position. By this time, the piston abutment is passing under
the right hand wing of the valve and steam enters the steam space K between
the abutment of valve E and right hand piston abutment and again presses it
forward in the direction it is still moving. The space K (in front of the piston
abutment) is in communication through the left exhaust space E7 with the left
exhaust G. Thus by a repetition of these movements, the piston is kept
rotating as long as supplied with steam. No matter how quickly the valve E
is moved, the steam cushions in chambers E10, E10, afore described prevent its
wings from seating hard upon the periphery of the piston.
It will be observed that when valve E is on a horizontal center, each wing

page_text: thereof is at an equal distance from the periphery or face of the piston, and
there is an exhaust opening on each side of the valve which leads alternately
from space K, through- exhaust passages E7 to exhaust G, thus relieving the
space K of all undue pressure. While the valve E is horizontal, there is no
pressure in steam space K on either side of the piston abutment.
To cause the piston to move in a direction the opposite to that already men-
tioned, I reverse the position of the valve so that it takes steam through the
port RC, thereby passing steam through port RD and through the port RH
of the valve E. The piston will then obviously be driven in a direction 'the
opposite to that in which it heretofore ran. The operations will be conducted
upon the same principle as heretofore specified, except that the position of those
parts which are reversible will be reversed.
The aforedescribed mechanism will move with great facility and ease. The
perfect balance of the parts is such that the engine will not only run with the
mechanism aforedescribed, but can be reversed and operated by means of the
valve B only.
In order to easily reverse the valve B, and make steam port connections, and
enable it to operate, I provide mechanism also of my invention, and apply the
same to the exterior of the engine, preferably as shown in Sheet 1, namely:-
M indicates a rocking device or lever fixed to a shaft M². The latter passes
through and is fixed to valve B and at M³ is journalled preferably in the
extensions on the cylinder heads, as shown in Figure 4. To this shaft is fixed
the lever and valve B, by which the valve is moved.
The device M has arms RM and LM, each provided with a handle RMH
and LMH. The rocking device may be operated by these handles. Each arm
has a wrist M shown by solid lines in Figure 10, which terminates in an
annular flange M5, and beyond the latter is a second projection or stud M.
A cam rod N with adjustable yoke N2 surrounding an eccentric N³, is fixed on
the shaft P, viz.: the shaft of the rotary piston, concentric with the latter and
turned thereby. Rotation of the piston through the medium of the eccentric N³,
thus imparts to the cam rod a reciprocatory movement in the direction of the
length of the latter. The cam rod is provided at its upper end with a handle N16
for moving it laterally from one end of the rocking device M to the other end.
It is further provided on each side with a recess N+ (shown by dotted lines in
Figure 1 and solid lines in Figure 7) to receive one of the wrists M of the
rocking device M. The cam rod is provided with a suitable device for locking it
to either wrist of the lever or rocking device. A desirable device of this kind
is shown and is as follows:-A latch piece N7 is pivoted at N8 to the cam rod N and
has a handle N°. The lower part of the latch piece N7 is pressed toward the cam
rod handle for purposes, now to be mentioned, by a spring as N. The lower
portion of the latch has two openings N12, N12, cach of a size capable of receiving
one of the studs Me of the wrists. The lower portion of the latch has also
another opening N13, adapted to receive a stud N fixed in the cam rod. The
object of this last mentioned construction is to enable the stud N¼ to steady the
latch and obviate a twisting strain upon the latter, and to take part of the strain
off of the pivot, or hinge N8.
As heretofore mentioned, the rocking device can be worked by means of
either or both of its handles, but it can also be operated to reverse the valve B,
by means of the cam rod N. For example, there is a downward extension M
of the rocking device provided at its lower end with the slot M8, there being the
sweeps M, M, on each side of the slot M8. These sweeps are in curves, described
from the proper centers, so as to allow the roller on pin N15 to travel on the
sweeps while the cam rod and the rocking device are hooked together and in
motion. This slot M8 is for the reception of the pin №15 of the cani rod N.
By unlocking the cam rod N from the wrist to which it may be locked, and
moving the cam rod back and forth as desired, the valve B is reversed.
To enable the valve E to be reversed also, when the valve B is reversed, I pro-

page_text: vide the device M with the studs M10, and I affix to the shaft E2 of the valve E,
a rock arm E³, whose upper free end lies between these studs M10. Oscillation
of the rocking device M or of the rock shaft N, in reversing valve B also reverses
valve E.
The cam rod N also performs an additional function, viz.: it operates, as
moved by the eccentric Ñ³ to make the valve B cut off steam at a given and
desired period in the revolution of the piston. As at present arranged, the
eccentric as shown operates to cause the valve B to receive steam and transmit
it by valve E to cause the valve B to receive steam and transmit it by valve E
to the steam space K and later to cut off steam when the piston has made about
two thirds of its revolution from where it received steam. Cams of different
shapes or throw can be respectively substituted for the eccentric N³ and so as to
cause valve B to cut off steam at any desired point of the revolution of the piston.
The engine can thus be caused to work with more expansion of steam than that
first mentioned.
The exterior mechanism for moving the abutment valve E is substantially as
follows: On the driven or driving shaft P of the piston is fixed a cam Q.
Above the cam are two rollers R and R. Each roller is pivoted to a slide
piece S, sliding in its own guide T, fixed to the cylinder head of the engine.
Each of the slides has a toothed rack S2 engaging toothed arms S3, after the
manner of sections of a pinion and these arms are fixed on the shaft 2 of the
valve E. The operating point or nose Q2 of the cam Q preferably coincides in
shape and position with the position of the piston nose or abutment J within
the cylinder. Thus the nose of the cam and the piston abutment lic in sub-
stantially same plane, this plane being transverse to the planes in which the
piston is moving. As the piston revolves in direction of the arrow, the cam Q
lifts the right hand roller R, of Figure 2, which latter moves the free or idle
side of right hand arm $3 upward and turns the shaft E, thus lifting that side
or wing of the valve E, which (in Figure 3) is on the left hand, and depressing
the right hand wing thereof, and also depressing the roller R which is on the left
hand in Figure 2. The valve remains thus while the piston abutment is passing
under the left wing and center of the valve E, and then the nose Q2 of the cam
raises the left hand roller R of Figure 2, and the right hand wing of the valve E
of Figure 3, and correspondingly depresses the left hand wing of the valve E
of Figure 3, and the right hand roller of Figure 2, thus allowing the piston
abutment to pass altogether from under the valve E, and seating the left hand
wing on the piston so as to form steam abutment back of the piston abutment.
The action of the valve and of the functions it performs being the same as
those already described in the aforespecified operation of the interior flanges or
inclines J, 7, adjacent to the piston abutment, further description thereof here
is deemed unnecessary.
The object and function of the outside cam Q is to relieve wear on incline J'
and prevent, through wear of these inclines J, the abutment J from coming at
any time in contact with valve E, and also preventing any irregular wear on
valve E, except that which is caused by the piston, while in contact with the
latter as the piston revolves.
"When the valves are reversed, the action of the cam Q is in principle the
same, although its movement is reversed, and causes the valve E to act in
causing the steam to propel the piston in the opposite direction.
The valve E is so formed that while it is upon its horizontal center, it balances
without tendency to turn down toward either side. But as soon as it has been
seated on one side or the other, the pressure of steam contributes to retain it in
that position, until it is forcibly moved either by human agency, or the valve
reversing mechanism of the engine. The reasons for the facts just stated are
as follows:When the valve 'is placed horizontally, any pressure of steam in
the cylinder is communicated to the entire bottom face of the valve. When the
valve is thrown to the left and occupies the position shown in Figure 3, the steam

page_text: cannot press against the bottom of the portion or foot E of the left wing of the
valve, because it is in contact with the face of the piston, but it can press on
the mid portion of the bottom, viz.: that portion which lies between the left and
right wings, and as the larger part of this middle portion E³ is now to the right
of a vertical plane or center passing through the axial center of the valve, as
indicated by the dotted line y, y, the extra pressure of steam contributes to keep
the right hand wing of the valve uplifted. Furthermore, the uplifted bottom or
face of the right hand wing is subject to the pressure of steam while the
steam cannot reach the bottom of the left hand wing now resting on the face or
periphery of the piston. Therefore the steam contributes pressure against the
bottom of the right hand wing also to keep the same uplifted. Thus that amount
of area (in inches) of surface of the valve which is on the right hand side of the
vertical axial plane of the valve, in excess of that which is on the left hand side
of said vertical plane, multiplied by the pressure of the steam per square inch,
will be the force which the steam in the cylinder exerts to keep the valve in
the position named, and by the aid of that wing which is seated on the face of the
piston, cause a steam abutment to be present in space K. When the position of
the valve has been reversed, the pressure of the steam admitted to the space K
will in like manner and with like force operate to keep the left hand wing of the
valve uplifted.
In Figure 8, I have shown a diagram in connection with valve E, which quite
clearly illustrates the aforedescribed changes in the comparative amount of sur-
face, exposed to steam pressure on opposite sides of the valve, when the latter
is raised or lowered on one side or the other of its central position as compared
with the amount of surface exposed on each side when the valve is on its center.
In this Figure 8, the position of the valve when lowered on the right, and
seated on the surface of the piston is duly indicated by dotted lines. So also
dotted lines are present to indicate the difference in area aforementioned. This
illustration of the differences in area, when the valve is seated on its right wing,
obtains in like manner (but on the opposite side of the valve) when the valve is
scated on its left wing.
As before remarked, in relation to the cutting off of steam from the steam
space K, by means of the interior incline J and valve E or by the outer
eccentric N and valve B, the steam is cut off after the piston has accomplished
two thirds of its revolution thereof. During one half of this one third (viz.:
one sixth of a revolution of the piston) the steam has opportunity to act by
expansion, and then during the remaining one sixth of the revolution, exhausting
the steam is from one or both sides of the valve E, and the momentum of the
revolving portions of the piston carry the piston abutment past the valve E,
and change the latter so that it forms an abutment and admits steam behind the
piston abutment, and again impels the piston forward.
The piston by its inclines J, and without any of the exterior mechanism for
operating the valve E, will operate this valve E in the same manner as does the
exterior mechanism, when present. In such case, no expansion of the steam in
space K will be employed to operate the piston,-it being understood that the
ports which convey steam to valve E will in such case remain open.
This latter operation can be accomplished as follows:-The cam rod N is dis-
connected from the lever or rocking device, so that it (the cam rod) shall not
work the lever or rocking device. The valve B is then set to take steam all of
the time. The valve E will be operated as before mentioned, and without the
valve B acting as a cut off. Thus the cylinder space K will take steam for five
sixths of the revolution of the piston, at which time the valve E will be moved
and cuts off the steam, and exhaustion of the live steam in the steam space will
take place.
By approximating the seating surfaces E6 of the valve E, the amount of
momentum necessary to carry the piston past the valve E will be correspondingly
diminished, and the live steam act on the piston abutment for a longer time,

page_text: and in case expansion of steam is employed, the distance which the piston travels
by expansion may be increased, by the valve cutting the steam at the regular
time.
..It will be understood that expect to apply two or more of such valves as B
and E, with their necessary accompaniments, to an engine, as I find desirable.
It will be understood that a packing is present between the inner sides of
the cylinder heads and the cylinder. A suitable packing V is shown in solid
lines in Figure 4 and in dotted lines in Figure 3. The packing is pressed against
the inner face of the cylinder heads by spiral springs V2, shown by dotted lines
in Figure 4. A drain pipe W closed by a suitable cock W2, can be operated
so as to discharge from the cylinder the water resulting from condensed steani.
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 rotary engine, having a rotary piston, and piston abutment, and a
valve E adapted to oscillate, and having ports LH and RH, and wings E4, E*,
on its lower side, near the outer edges of the valve, a space K being present
below the middle of the valve and between the wings, each wing having a portion
whose bottom is a seat for closely impinging at the proper occasion on the
rotary piston, and the side of the wing being adapted to be received and fit closely
against the adjacent wall of the valve chamber, the said ports LH and RH
having their outlets between the abutments E5, E5, of the wings E, E, and
ports LD and RD, for respectively inletting steam to the ports LH and RH
of the valve, according as the valve is turned, substantially as and for the purposes
specified.
2. In a rotary engine, having a rotary piston, and piston abutment, and a
valve E adapted to oscillate, and having ports LH and RH, and wings E4, E,
on its lower side, near the outer edges of the valve, a space K being present below
the middle of the valve and between the wings, each wing having a portion
whose bottom is a seat for closely impinging at the proper occasion, on the face
of the rotary piston, and the side of the wing being adapted to be received and
fit closely against the adjacent wall of the valve chamber, and ports LD and RD,
for respectively inletting steam to the ports LH and RH of the valve, according
as the valve is turned, a space E7 above the face line of each wing E being
connected to the exhaust, and arranged as described, so that when a given wing
of the valve is seated on the piston, the space E7 on that side of the valve con-
nects the steam space K with the exhaust, and when the valve is balanced, both
spaces E7 connect with the steam space and with the exhaust substantially as
and for, the purposes specified.
3. In a rotary engine, having a rotary piston, and piston abutment, and a
valve E adapted to oscillate, and having ports LH and RH, and wings E', E,
on its lower side, near the outer edges of the valve, a space K being present
below the middle of the valve and between the wings, each wing having a portion
whose bottom is a seat for closely impinging at the proper occasion, on the
rotary piston, and the edge or seating face of the wing being adapted to be
received and fit closely against the adjacent wall of the valve chamber, and ports
LD and RD, for respectively inletting steam to the ports LH and RH of the
valve, according as the valve is turned, and spaces or compartments E10, formed
by the parts E9 of the valve, and the cushioning chamber of varying size as the
valve is moved, and a passage F closed by a spring valve F³ and connected
through a succeeding passage F2 with the exhaust, substantially as and for the
purposes specified.
4. In a rotary engine, having a rotary piston. and piston abutment, and a
valve E adapted to oscillate, and having ports LH and RH, and wings E4, E4,
on its lower side, near the outer edges of the valve, a space K being present
below the middle of the valve, and between the wings, each wing having a portion

page_text: whose bottom is a seat for closely impinging at the proper occasion, on the
rotary piston, and the side of the wing. being adapted. to be received and fit
closely against the adjacent wall of the valve chamber, and ports LD and RD,
for respectively inletting steam to the ports LH and RH of the valve, according
as the valve is turned, a space E7 above each wing E being connected to the
exhaust and arranged as described, so that when a given wing of the valve is
seated on the piston, the space E7 on that side of the valve connects the steam
space with the exhaust, and when the valve is balanced, both spaces. E7 con-
nect with the steam space and with the exhaust, and spaces or compartments E
formed by the parts of the valve and the valve cushioning chamber, of varying
size as the valve is moved, and a passage F, closed by a spring valve F3, and
connected through a succeeding passage with the exhaust, substantially as and
for the purposes specified.
5. In a rotary engine, having a rotary piston, and piston abutment and a
valve E adapted to oscillate, and having ports LH and RH, and wings E³, E*,
on its lower side, near the outer edges of the valve, a space K2 being present below
the middle of the valve. and. between the wings, each wing having a portion
whose bottom is a seat for closely, impinging at the proper occasion, on the
rotary piston, and the side of the wing. being adapted to be received and fit closely
against the adjacent wall of the valve chamber, and ports LD and RD, for
respectively inletting steam to the ports LH and RH of the valve,. .according as
the valve is turned, a space E7 above each wing E+ being connected to the exhaust
and arranged as described, so that when a given wing of the valve is seated on the
piston, the space E7 on that side of the valve connects the steam space K with
the exhaust, and when the valve is balanced, both spaces E7 connect with the
steam space and with the exhaust, and spaces or compartments E10 formed by
the parts of the valve, and the valve chamber, and of varying size as. the
valve is moved, and a passage F closed by a spring valve F3, and connected to a
passage formed in the face of the adjacent cylinder and walled in by the solid
end of the valve, and continued across the engine and into the exhaust orifice
at the opposite side of the engine from where the said steam cushion apartment
is located, substantially as and for the purposes specified.
6. In a rotary engine, an oscillating abutment valve E having wings for
impingement on the rotary piston, and a space between said. wings and below
the middle of said valve, and the piston abutment having the inclines J, re-
spectively on the front and rear side for operating the valve, and inlet ports, and
exhaust ports of the valve located on the outer sides of the wings, substantially
as and for the purposes specified.
7. In a rotary engine, an oscillating abutment valve E having wings for
impingement on the rotary piston, and a space between said wings and below
the middle of said valve, and the exterior cam rotated with the piston, .and
the slidable arms adapted to be both operated successively, or alternately, by
the cam, at each revolution of the latter, and provided with projections engaging
oscillating arms connected to the stem or shaft of the valve, substantially as
and for the purposes specified.
8. In a rotary engine having an oscillatory valve for conveying steam to the
principal valve, and for changing the direction of the steam, and for cutting off
steam, and having the two ports, an oscillating or rocking device having the
arms RM and LM, having handles, substantially as and for the purposes
specified.
9. In a rotary engine having an oscillatory valve, for cuting off steam, and
for changing the direction of the latter, an oscillating rocking device having
arms RM and LM, each provided with a projection M4, and a minor pro-
jection M therefrom, and a cam rod provided with the recesses N+, and the
latch lever pivoted to the cam rod, and having the openings for engaging re-
spectively the projections Me of the rocking device, as presented, and while the

page_text: projection M is in its adjacent recess N*, the latch lever being caused to lock
inus, by elastic means, substantially as and for the purposes specified.
10. In a rotary engine having an oscillatory valve, for cutting off steam, and
for changing the direction of the latter, an oscillating rocking device having
arms RM and LM, each provided with a projection M*, and a minor pro-
jection M6 therefrom, and a cam rod provided with the recesses N*, and the
latch lever pivoted to the cam rod, and having the openings for engaging
respectively the projections 16 of the rocking device, as presented, and while
the projection A is in its adjacent recess N*, the latch lever being caused to
lock thus, by elastic means, there being a disc or annular flange af between
the projections M4 and M6, which flange is adapted to keep the cam rod from
lifting directly forward and off from connection with projection M, while the
latch lever also prevents the projection M from moving sidewise out of the
recess, substantially as and for the purposes specified.
11. In a rotary, engine having an oscillatory valve, for cutting off steam, and
for changing the direction of the latter, an oscillating rocking device having
arms RM and LM, each provided with a projection M*, and a minor pro-
jection 6 therefrom, and a cam rod provided with the recesses N, and the latch
lever pivoted to the cam rod, and having the openings for engaging respectively
the projections M6 of the rocking device, as presented, and while the pro-
jection M is in its adjacent recess N, the latch lever being caused to lock thus,
by elastic means, and the rocking device provided with extension M7, having
studs M10, and the valve rocking arm pivoted on shaft, and adapted to engage the
studs M, according to the position of the rocking device, substantially as and
for the purposes specified.
12. In a rotary engine having an oscillatory valve, for cutting off steam, and
for changing the direction of the latter, an oscillating rocking device having
arms RM and LM, each provided with a projection M*, and a minor pro-
jection M therefrom, and a cam rod provided with the recesses N¹, and the
latch lever pivoted to the cam rod, and having the openings for engaging re-
spectively the projections M6 of the rocking device, as presented, and while the
projection M is in its adjacent recess N4, the latch lever being caused to lock thus,
by elastic means, and the rocking device provided with extension M, having
studs M10, and with a notch in its lower end and sweeps, the cam rod having pin
adapted to engage in said notch, as the cam rod oscillates, and the rocking
arm of valve E, adapted to engage the studs M10, according to the position of
the rocking device, substantially as and for the purposes specified.
13. In a rotary engine, having an oscillatory valve for conveying steam to the
principal valve, and for changing the direction of the steam, and for cutting off
steam, and having the two ports, an oscillating or rocking device having the
arms RM and LM, provided with handles, for operating the first named valve,
eccentric N3 and the push rod engaging the rocking device, and the exterior
mechanism for operating the abutment valve E, viz.: rollers R, R, slide pieces S
carrying the rollers, guides T, T, and toothed racks on the slide pieces, toothed
arms fixed on shaft E of the abutment valve E, and the cam Q, Q³, substantially
as and for the purposes specified.
14. In a rotary engine, the rotary piston, abutment valve, exterior mechanism
for operating this valve, viz.: cam Q, Q3, slide pieces S provided with device for
receiving the impingement of the nose of the cam, guides T, T, and toothed racks
on the side pieces, toothed arms engaging said racks, and fixed on shaft E³ of
the abutment valve, substantially as and for the purposes specified.
Data
L T
1000