Improvements in Rotary Motors, applicable also as Pumps.
Year: 1893

page_text: Date of Application, 12th May, 1893
Complete Specification Left, 17th July, 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Rotary Motors, applicable also as Pumps.
We, FIRMIN BRÜCKERT Builder and AUGUSTIN DELATTRE Engineer, both
of 15 Rue des Halles, Paris, France, do hereby declare the nature of this invention
to be as follows :-
This invention has reference to improvements in rotary motors applicable also as
pumps, and in order that the nature thereof may be readily understood we will
proceed to describe the same by aid of the accompanying drawings, in which
Fig. 1 is a longitudinal section; and
Fig. 2 an end elevation partly in transverse section on the line m n Fig. 1, of a
rotary motor constructed according to this invention.
Fig. 3 shows the arrangement of gearing which alternately fixes and releases the
blades of the motor.
Fig. 4 is a side view of Fig. 3.
Fig. 5 illustrates the construction of valve employed for reversing the direction
of rotation of the motor shaft.
Fig. 6 illustrates a multiple expansion motor according to this invention...
Fig. 7 illustrates the construction and arrangement of the blades of the motor.
Fig. 8 is a part transverse section on the line mnt n¹ Fig. 10 of a modified
construction of motor, and
Fig. 9 is a transverse section of the pump according to this invention.
Fig. 10 showing the arrangement of the blades in these two cases.
Each of the blades B C is composed of a cylindrical part a (Fig. 7) made in one
with the blade itself but of only half the length thereof; this cylindrical part a is
fixed to a shaft b, on the outer extremity of which is mounted means for
alternately holding stationary the blades and releasing the same hereinafter
described. It will thus be seen that the two blades are mounted somewhat in the
manner of ordinary hinges.
The tightness of the joints between each blade and the cylindrical part a of the
other blade and the inner periphery of the cylinder is obtained by means of sliding
pieces DE which are forced outwardly by the motive fluid which enters a cavity
or chamber between them by the passage F.
The tightness of the joint between the ends of the blades and of the cylinder
may be obtained in several ways. According to one arrangement at each end of
the blades is arranged a disc such as ; these discs are forced against the ends of
the blades by the pressure of the motive fluid admitted through the pipe or
It will be seen that
passage to spaces between the discs and, the cylinder covers.
these discs I form so to speak pistons motive fluid may be admitted into the
annular space between the inner side of that part of the disc which is of larger
diameter and the end of that part of the cylinder which is of smaller diameter, the
pressure of the motive fluid then counterbalances to a certain extent the pressure
exerted on the exterior faces of the pistons I. In the construction of motor
illustrated in Fig. 1 only one of these pistons is employed, the blades rubbing
against a fixed disc at one end, and at the other against the disc I which by its
pressure against the blades always ensures the perfect contact of the ends of these
blades with the ends of the cylinder ends thus formed. According to another
arrangement one end is fixed and the other is capable of adjustment according to
requirement by means of bolts, it being understood that the end would be forced

page_text: inward against an interposed body having a certain elasticity and plasticity. It is
evident that both ends may be made adjustable if desired.
According to another arrangement the two ends are fixed and the blades are
each furnished with sliding pieces. analogous to the pieces DE; these sliding
pieces are pressed against the ends either by the pressure of the motive fluid, or
by the action of springs.
The blades are as hereinbefore stated alternately fixed and capable of being
moved; the fixed blade serves as an immovable surface for the motive fluid
admitted between the blades to act against, whilst the other blade is actuated
thereby and is communicating the motion to the second motor shaft M by means of
wheels K L hereinafter described; these wheels moreover alternately permit and
prevent the motion of each of the blades. K K' are two toothed wheels fixed
respectively to the ends of the shafts b of the blades B and C. L and L' are two
partially toothed wheels of a greater diameter keyed on the second motor shaft M,
to which a continuous rotary motion produced by the alternate engagement of the
teeth of the wheels K, K' with the teeth of the wheels L and L' is imparted. .
These wheels K and L and K' and L' may be so proportioned that the
wheels K K' make one revolution for a half or a quarter of a revolution of
the corresponding wheels L, L'; it will then be necessary in order to allow each
of the wheels K and K to alternately revolve to provide teeth on one half only of
the periphery of each wheel or on each alternate quarter only of the periphery
thereof according to the ratio of the wheels K and L and K¹ & L. In the
example illustrated one revolution of the wheel K or K' corresponds to half a
revolution of the wheel L or L'.
To secure with certainty the alternate revolution of the wheels K and K',
each of the wheels L and L is furnished, at the untoothed part with a sector N
and N¹.
On each of the wheels K and K'is fixed a disc O and O¹ formed with a recess c, d
the edge of which is in the form of an arc of a circle having a centre corre-
sponding with the axis of the wheels L & L' and a radius equal to that of the
sector N.
At the moment when one of the blades C for example, is to be held stationary,
the sector N¹ engages in the recess of the disc O', but when the wheels L and Li
have made half a revolution, the finger P¹ comes in contact with the stud Q', the
teeth of the two wheels engage and the wheel K¹, at the required time, is capable
of being moved by the blade C on the shaft of which it is mounted; when the
teeth of the wheels K' and L' are no longer in gear the sector N is engaged in the
recess of the disc O and the blade B is then held stationary and so on.
The fingers P, P' fixed on each of the wheels L and L' acts on the studs Q Q'
fixed on the wheels K and K' simply to assure at the proper moments the
engagement of the wheels K L and K L.
When a blade B for example, is at rest, the pressure of the motive fluid will
tend to make it rotate in a backward direction, but as this motion is prevented by
the sector N which is engaged in the recess c d of the disc O, one of the points c
ord of the recess of the disc O, according to the direction of the motion, would
rub against the sector N; to prevent this, on the end of the axle of each blade is
fixed a finger R or R¹ which, when the blade to the axle of which it is attached is
stationary, engages with a catch S or S' operated in any suitable manner; it will
be seen from Fig. 2 that by this means the blade is so held that no detrimental
rubbing on the sector N or N¹ occurs.
When the motive fluid enters the cylinder, it acts against the blade, for example C,
which is firmly held by the catch S¹ and the finger R' and also by the sector N'
which is engaged in the recess c' d' of the disc O; the blade B which is also acted
on by the motive fluid rotates and transmits its motion to the wheel L by means of
the wheel K; the blade B then approaches the blade C, the finger P presses on the
stud and secures the engagement of the wheels K' and L'; upon the teeth of
the wheels L and K disengaging from each other, the blade C moves, the sector N

page_text: engages in the recess of the disc O and the finger K hooks into the catch and
so on.
When the rotary motor according to this invention is to be operated by an
explosive mixture, in connection therewith there is provided a small rotary
compressor of a similar construction to the motor hereinabove described which
effects the compression of the explosive mixture either in an ignition or combustion
chamber or in the space between the two blades, ignition and combustion being
caused elsewhere by any known means, the pressure of the gases being transmitted
to the movable blade of the motor.
The motor may be arranged so that it shall act like motors of the type known as
four stroke cycle motors, that is to say the blade B in rotating, would draw in the
mixture, the blade C beginning to move would produce the compression, the blade B
recommencing to move would receive the impulse of the explosion of the gases and
the blade C recommencing to move, would cause the exhaust, and so on, the
ignition of the gases being produced by any known means. Moreover, a motor
according to this invention may be arranged to act with multiple expansion by
making the pressure of the motive fluid act successively in a series of motors of
gradually increasing capacity; it may also be adapted to act as a pump, in which
case the fingers R, R'and the catches S, S¹ can be dispensed with by putting at one
of the ends of the recesses c d and e' d' (according to the direction of the motion)
friction-rollers which will bear on the sectors N and N¹..
The motor which has just been described can without altering the principle of its
action, be arranged with the two blades B and C mounted on a fixed shaft and the
cylinder A instead of being fixed, have given to it a continuous rotary motion; to
effect this some mechanical modifications must be made; the necessary alternation
of motion and rest could be produced by means of the wheels K, K¹, L, L' but
they may also be produced by other means in a more simple manner.
In Figs. 8, 9, and 10 is represented such an arrangement, Fig. 8 being a partial
transverse section on the broken line m nt n' of Fig. 10 of a motor and
Fig. 9 being a similar view of a pump; Fig. 10 illustrates the arrangement of the
motor blades.
A is a bored out cylinder which also serves as a driving pulley and in which are
arranged the blades B, C. To this cylinder is imparted a continuous rotary motion.
In each of the blades B C is placed a piston D, furnished on each side with a rod
adapted to engage, sometimes in a notch in the cylinder A; sometimes in a notch
in a stationary cylindrical piece E, which is fixed on the stationary axle F. The
blades B and C are arranged as indicated in Fig. 10 and the pistons D and D' are
arranged radially in the blades the arrangement being such that some of the notches
in the piece E correspond to the piston rod of the piston D, in the plane m n and
other notches therein correspond to the piston rod of the piston D', in the planet, n'.
Each of the blades B and C is furnished with packing pieces pushed outwards by
springs, the packing pieces c, d, rubbing against the inner periphery of the rotary
cylinder A, the others e, f, against the cylindrical part of the other blade;
other pieces are arranged to make a joint laterally with the ends of the rotary
cylinder A.
One of the ends of this cylinder or both of them are pierced with two openings
or ports G and H, the one G serving for the admission of the motive fluid, the
other H for the exhaust.
The following is the operation of the motor.
The two blades B and C being in the position shown in Fig. 1, the motive fluid
arriving at G between the two blades, propels the blade B, which carries with it
the cylinder, the outer end of the piston rod D, being engaged in the notch I of
said cylinder A. The fluid contained in the other chamber can during this time
escape freely by the exhaust H.
A little before the blade B comes in contact with the fixed blade C, the exbaust
port is closed; a compression is thus caused between the two blades, which should

page_text: .
always be stronger than the initial pressure arriving at G. The fluid thus
compressed, entering by the orifices g h acts on the pistons D and D' and 'tends to
force the piston D towards the axle F and to cause the piston D1 to move towards
the cylinder wall; as soon as the end of the piston rod D is opposite a notch in the
piece E it engages therein. The blade B is then disengaged from the cylinder A,
which by reason of its acquired speed, continues its rotation; the notch I then
arrives opposite the extremity of the piston rod D', which rod immediately engages
therein. At this moment the ports G H instead of being on each side of the
blade B are on each side of the blade C. The blade B is now stationary and the
blade C starts into motion, receiving in its turn the motive action of the fluid;
the same phases are reproduced successively for each blade.
It is thus seen that each blade (becoming stationary by turn) makes a revolution
of 360 degrees less an angle equal to the angle between the radial axes of the two
blades when they touch each other.
The changes of action of the blades, always take place at different points, the
backward motion of the blades being always equal to the angle above mentioned at
each revolution.
The rotary motion of the cylinder A can be transmitted directly by means of a
beit passing round the cylinder, or in any other convenient manner.
The motor just described can be operated by an explosive mixture of a com-
bustible gas with air in two ways riz. :-a small compressor constructed similarly
to the motor just described can be arranged in connection with the motor so as to
draw in and then compress the explosive mixture in a compression chamber; or the
explosive mixture can be compressed in the space existing between the two blades,
the ignition of the gases being produced by any known means.
The motor may be arranged to act like motors of the type known as four stroke
cycle motors; that is to say, the blade B in rotating would draw in the mixture;
the blade C starting into motion would produce the compression; the blade B
restarting into motion would receive the impulse at the moment of explosion
of the gases; and finally the blade C again starting into motion in its turn,
would operate the exhaust and so on the ignition of the gas being produced by any
known means.
When constructing a pump according to this invention we arrange the orifices gh
in an inverse manner, as shown in Fig. 9, and instead of arranging the outer ends
of the piston rods D and D' so as to engage in rotation in a notch made in the
cylinder A, they are arranged to engage in a catch Z which is jointed at the
point K³ in a recess made for the purpose in the cylinder. The cylinder A being
set in motion, carries round the blade B the piston rod D of which is engaged in
the catch Z. When the blade B approaches the blade C, the catch Z comes
against the projection L³ on the blade C, and is thus raised and disengaged from
the end of the piston rod D; on the blade B coming against the blade C it is
stopped. As the cylinder A continues its course the ports G and H come on each
side of the blade C; the holes g and h of the one blade, which were originally in
communication with the compression and the exhaust spaces respectively, (and
inversely for the other blade), are now the one g in communication with the
exhaust and the other with the compression space, (and inversely for the other
blade). The pistons D D' are then moved in opposite directions, that is to say,
the piston D instead of being forced towards the cylinder wall is moved towards
the piece E and the piston D' instead of being pushed towards the piece E is moved
towards the cylinder wall.
As soon as the notch of the catch Z is opposite the piston rod D¹ the latter will
engage in it and the piston-rod D will engage in the corresponding notch of the
piece E and the same phases will be reproduced at each revolution.
It is evident if the orifices y be arranged as in Fig. 8 this construction may be
employed as a motor; it will not be necessary as in the case of Fig. 8, to provide
so great a compression, the necessary compression being only sufficient to diminish
A

page_text: the shock of the moving blade meeting the stationary blade; this shock being
greater or less according to the speed of the motor. The compression will
therefore be regulated according to the speed of the motor.
Dated this 11th day of May 1893.
F. BRÜCKERT,
By L. W., per F. B.
A. DELATTRE,
By L. W., per F. B.
Improvements in Rotary Motors, applicable also as Pumps.
We, FIRMIN BRÜCKERT, Builder and AUGUSTIN DELATTRE, Engineer, both
of 15 Rue des Halles, Paris, France, 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 has reference to improvements in rotary motors applicable also as
pumps, and in order that the nature thereof may be readily understood we will
proceed to describe the same by aid of the drawings left with our Provisional
Specification in which,
Fig. 1 is a longitudinal section, and
Fig. 2 an end elevation, partly in transverse section on the line m n Fig. 1, of a
rotary motor constructed according to this invention.
Fig. 3 shows the arrangement of gearing by which each of the blades of the
motor is held stationary and released alternately.
Fig. 4 is a side view of Fig. 3.
Fig. 5 is a sectional detail view illustrating a construction of valve suitable for
reversing the direction of rotation of the motor shaft.
Fig. 6 is a side elevation illustrating a multiple expansion motor according to
this invention.
Fig. 7 illustrates the construction and arrangement of the blades of the motor.
Fig. 8 is a part transverse section corresponding to the line mnt n' Fig. 10, of
a modified construction of motor, and
Fig. 9 is a similar transverse section of this modified construction of motor
arranged as a pump.
Fig. 10 showing the arrangement of the blades in these two cases.
Referring to Figs. 1 to 7 inclusive, the motor comprises a cylinder A provided
with two independent blades B. C. Each of these blades B, C is provided
with a cylindrical part a (Fig. 7) that is made in one with the flat part but of only
half the length thereof. This cylindrical part a is fixed to a shaft b, on the outer
extremity of which are mounted means for alternately holding the blade stationary
and releasing the same as hereinafter described. It will thus be seen that the two
blades are mounted somewhat in the manner of ordinary hinges.
A tight joint between the flat part of each blade and the cylindrical part a of
the other blade and between the said flat part and the inner periphery of the
cylinder, is obtained by means of sliding pieces DE (Fig. 2) which are fitted to
slide radially in each blade and are forced apart by the motive fluid which enters a
cavity or chamber between them by the passage F.
The tightness of the joint between the ends of the blades and of the cylinder
may be obtained in several ways. According to one arrangement, at one end or at
each end of the blades is arranged a disc such as I (Fig. 1) that is forced against
the adjacent ends of the blades by the pressure of the motive fluid admitted through
the pipe or passage r to a space between the disc and the adjacent cylinder cover.
It will be seen that such a disc practically forms a piston.
Motive fluid may
admitted into the annular space between the inner side of that part of the
be

page_text: disc which is of larger diameter and to the end of that part of the cylinder
which is of smaller diameter, so that the pressure of the motive fluid on the
internal face of the pistons will then counterbalance to a certain extent the
pressure exerted on its external face. In the construction of motor illustrated in
Fig. 1, only one of these discs or pistons is employed the blades rubbing at one end
against a fixed disc forming one end of the cylinder, and at the other end against
the disc I which, by its pressure against the blades, always ensures the perfect
contact of the ends of these blades with the ends of the cylinder thus formed.
According to another arrangement, one end of the cylinder is fixed and the
other J is made capable of adjustment, according to requirement, by means of
adjusting devices such as bolts, a somewhat elastic body being interposed between
the said adjustable end and its adjusting device. It is evident that both ends of
the cylinder may be made adjustable if desired.
According to another arrangement the two ends of the cylinder are fixed, and
the ends of the blades B C are each furnished with sliding pieces analogous to 1
the pieces D, E such sliding pieces being pressed against the ends of the cylinder
either by the pressure of the motive fluid, or by the action of springs.
The blades are, as hereinbefore stated alternately held stationary and allowed to
be moved by the motive fluid; the fixed blade serving for the time being as an
immovable surface for the motive fluid admitted between the blades to act against,
whilst the other blade which for the time being is actuated by the motive fluid,
communicates its motion to a second motion shaft M by means of wheels K, L,
hereinafter described which alternately permit and prevent the motion of each of
the blades. K, K¹ are two completely toothed wheels fixed respectively to the ends
of the shafts b of the blades B and C. L and L are two partially toothed or
segment wheels of a greater diameter than K K', keyed on the second motion
shaft M, to which a continuous rotary motion produced by the alternate engagement
of the teeth of the wheels K and K' with the teeth of the wheels L and L, is
imparted.
These wheels K and L and K' and L' may be so proportioned that the
wheels K, K' make one revolution for a half or a quarter of a revolution of the
corresponding wheels L, L'; it will then be nccessary, in order to allow each of
the wheels K and K' to alternately revolve and remain stationary to provide
toothed parts on the periphery of each wheel L L' the length of each toothed
part being equal to half the circumference or a quarter of the circumference:
thereof, according to the ratio of the wheels K and Land K' and L' to each other.
In the example illustrated one rotation of the wheel K or K' corresponds to half a
rotation of the wheel L or L'.
To secure with certainty the alternate rotary movement of the wheels K and K',
the wheels L and L' are furnished at the untoothed parts with sectors N and Ni
respectively and on the wheels K and K' are fixed discs O and O' respectively
each formed with a recess c, d the edge of which is in the form of an arc of a circle
having a centre corresponding with the axis of the wheels L and L' and a radius
equal to that of the sector N. The arrangement is such that at the moment when
one of the blades, C for example, is to be held stationary, the sector N' engages
in the recess of the disc O¹, but when the wheels L and L' have made half a
revolution, a finger Pl on the wheel L' comes into contact with a stud Q' on the
wheel K' the teeth of the two wheels engage, and the wheel K', at the required
time, is capable of being moved by the blade C on the shaft of which it is
mounted; when the teeth of the wheels K' and L' are no longer in gear, the sector N'
is engaged in the recess of the disc O' and the blade C is then held stationary and
so on a similar cycle takes place with regard to the blade B, its periods of rest
and motion being synchronous respectively with the periods of motion and rest of
the blade C. The fingers P P¹ fixed on the wheels L and L' respectively act on the
studs Q, Q fixed on the wheels K and K' respectively, simply to ensure at the
proper moments, the engagement of the wheels K, L and K' L'
When a blade, B for example, is at rest, the pressure of the motive fluid will

page_text: tend to make it rotate in a backward direction, but as this motion is prevented by
the sector N, which is engaged in the recess cd of the disc O, one of the
points or d of the said recess according to the direction of the motion, would rub
against the said sector N. To prevent this, on the end of the axle of each blade is
fixed a finger R or R' which when the blade to the axle of which it is attached is
about to be held stationary, engages with a catch S or S' which operates in such a
manner that the engaged blade will be prevented from returning backwards. It
will be seen from Fig. 2, that by this means the blade will be so held that no
detrimental rubbing on the sector N or N¹ will occur.
The operation of the motor is as follows:-
When the motive fluid enters the cylinder, it acts against the blade, for
example C, which is then firmly held by the catch S' and the finger R', and also
by the sector N₁ which is engaged in the recess c d of the disc 01. The blade B,
which is also acted upon by the motive fluid then rotates and transmits its motion
to the wheel L by means of the wheel K and as the blade B approaches the
blade C, the finger P₁ on the wheel L₁ presses on the stud Q' of the wheel K' and
secures the engagement of the wheels K' and L'. Upon the teeth of the
wheels L and K becoming disengaged from each other the blade C commences to
move, the sector N engages in the recess of the disc O and the finger R engages
with the catch S, and so on.
When a rotary motor according to this invention is to be operated by an explosive
mixture it is provided with a small rotary compressor of a similar construction to the
motor hereinabove described which effects the compression of the explosive mixture
either in an ignition or combustion chamber or in the space between the two blades,
ignition and consequent combustion being caused by any known means and the
pressure of the gases being transmitted to the movable blade of the motor, in the
manner herein before explained.
The motor may be so constructed that it will act like motors of the type known
as four stroke cycle motors, that is to say so that the blade B in rotating will draw
in the mixture, the blade C beginning to move will produce the compression, the
blade B recommencing to move will receive the impulse of the explosion of the gases,
and the blade C recommencing to move, would cause the exhaust, and so on, the
ignition of the gases being produced by any known means. Motors according to
this invention may also be constructed to work with multiple expansion by causing
the motive fluid to act successively in a series of cylinders of gradually increasing
diameters. Such a multiple expansion motor may be constructed to work as a
condensing motor, the air pump used with the condenser being a pump of the
kind herein described.
Motors such as herein before described may also be adapted to act as pumps, in.
which case the fingers R R' and catches S' can be dispensed with by arranging at
one of the ends of the recesses cd (according to the direction of the motion) friction
rollers that will bear on the sectors N and N¹.
The motor herein before described, can, without altering the principle of its action,
be arranged with the two blades B and C mounted on a fixed shaft and the
cylinder A instead of being fixed, may have given to it a continuous rotary motion.
To effect this some mechanical modifications must be made the necessary
alternation of motion and rest of the blades could be produced by means of the
wheels K K' and L L' but it may also be produced by other means in a more
simple manner.
In Figs. 8, 9 and 10 is represented an arrangement of this kind, Fig. 8 being a
partial transverse section, corresponding to the broken line mnt n' of Fig. 10 of a
motor and Fig. 9 being a similar view of a pump. Fig. 10 illustrates the
arrangement of the motor blades.
A is a bored out cylinder which also serves as a driving pulley and in which are
arranged the blades B, C. To this cylinder is imparted a continuous rotary motion.
In each of the blades B, C is placed a piston D, D¹ furnished on each side with a
rod adapted to engage, sometimes in a notch in the cylinder and sometimes in a

page_text: notch in a stationary cylindrical piece E, which is fixed on the stationary axle F.
The blades B and C are arranged as indicated in Fig. 10 and the pistons D and D¹
are arranged in the blades with their rods in radial positions the arrangement being
such that some of the notches in the piece E correspond to the rod of the piston D,
in the plane m n, and other notches therein correspond to the rod of the piston D¹ 5
in the planet n'. Each of the blades B and C is furnished with packing pieces
pushed outwards by springs, the packing pieces c, d rubbing against the inner
periphery of the rotary cylinder A, the others e, f, against the cylindrical part of
the other blade; other packing pieces are arranged to make a joint laterally with
the ends of the rotary cylinder A.
One or each of the ends of this cylinder is pierced with two openings or ports G
and H, the one G serving for the admission of the motive fluid, and the other H for
the exhaust.
The following is the operation of this modified construction of motor :-
The two blades B and C being in the position shown in Fig. 8, the motive fluid
arriving at G between the two blades, propels the blade B which carries with it the
cylinder A owing to the cuter end of the rod of the piston D being engaged in the
notch I of the said cylinder. The fluid contained in the other chamber between
the blades, will during this time escape freely by the exhaust H. A short time
before the blade B comes in contact with the fixed blade C the exhaust port is
closed, a compression is thus caused between the two blades, which compression
should be greater than the initial pressure of the motive fluid entering at G. The
fluid thus compressed, entering by the orifices g, h acts on the pistons D and D' and
tends to force the piston D towards the axle F and to cause the piston D' to move
towards the cylinder wall. As soon as the end of the rod of the piston D is opposite
a notch in the piece E it engages therein; the blade B is then disengaged from the
cylinder A, which by reason of its acquired speed, continues its rotation and the
notch I arrives opposite the outer extremity of the rod of the piston D', which
immediately engages therein. At this moment the ports G H instead of being on
each side of the blade B will be on each side of the blade C. The blade B will
now be held stationary and the blade C set in motion by the pressure of the motive
fluid. The same phases are reproduced successively for each blade.
It will thus be seen that each blade becoming stationary by turn makes whilst in
action a revolution of 360 degrees less an angle equal to the angle between the
radial axes of the two blades when they touch each other. The change of action
of the blades, always takes place at different points, the backward motion of the
"blades relatively to the cylinder being always equal to the angle above mentioned
at each revolution.
The rotary motion of the cylinder A can be transmitted directly by means of a
belt passing round the cylinder, or in any other convenient manner.
The motor just described can be operated by an explosive mixture of a com-
bustible gas with air, in two ways viz.:-a small compressor constructed similarly
to the motor just described can be arranged in connection with the motor so as to
draw in and then compress the explosive mixture in a compression chamber, or the
explosive mixture can be compressed in the space between the two blades of the
motor the ignition of the gases being produced by any known means.
Motors constructed as shown in Fig. 8 may be arranged to act like motors of
the type known as four stroke cycle motors, that is to say, so that the blade B-in
rotating will draw in the mixture; the blade C starting into motion will produce
"the compression; the blade B restarting into motion will receive the impulse at
the moment of the explosion of the gases; and finally the blade C again starting
into motion in its turn, will effect the exhaust and so on, the ignition of the gas
being produced by any known means.
When constructing a machine of the type shown in Fig. 8 to serve as a pump,
according to this invention, we arrange the orifices g, in the blades B C in an
inverse manner, as shown in Fig. 9, and instead of arranging the outer ends of the
rod of the pistons D and D¹ so as to engage alternately in a notch made in the

page_text: cylinder A, they are arranged to engage in a catch Z which is jointed at
the point K in a recess made for the purpose in the cylinder. The cylinder A,
being set in motion, carries round the blade B the rod of the piston D of which is
engaged in the catch Z. When the blade B approaches the blade C, the catch Z
comes against the projection L' on the blade C, and is thus raised and disengaged
from the end of the rod of the piston D and on the blade B coming against the
blade C it is stopped. As the cylinder A continues its course, the ports G and H
come on each side of the blade Č; the holes g and of the one blade, which were
originally in communication with the delivery and the suction spaces respectively,
(and inversely for the other blade), are now the one 7 in communication with
the suction and the other h with the delivery space, (and inversely for the other
blade). The pistons D, D! are then moved in opposite directions, that is to
say the piston D instead of being forced towards the cylinder wall, will be
moved towards the piece E, and the piston D¹ instead of being pushed towards
the piece E will be moved towards the cylinder wall. As soon as the notch of
the catch Z is opposite the rod of the piston D', the latter will engage in it,
and the rod of the piston D will engage in the corresponding notch of the
piece E. The same phases will be reproduced at each revolution.
It will be evident that if the orifices g, h be arranged as in Fig 8, the construc-
tion shown in Fig. 9 may be employed as a motor; it will not however be necessary,
as in the case of Fig. 8, to provide so great a compression, the compression
necessary being only sufficient to diminish the shock of the moving blade meeting
the stationary blade which will be greater or less according to the speed of the
motor. The compression will therefore be regulated according to the speed of the
motor.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A rotary motor, or pump, constructed with two rotary blades B C mounted
to rotate in the motor cylinder, and with means whereby each of said blades in
turn will be held stationary whilst the other is left free to be rotated by motive
fluid admitted between the blades when working as a motor, or to be rotated by
external force when working as a pump substantially as described.
2. In a rotary motor or pump of the kind referred to in the preceding claim, the
combination with the blades BC of the toothed wheels K L and K' L'; constructed
and arranged substantially as herein described for the purpose specified.
3. In a rotary motor or pump of the kind herein referred to, the combination
with the toothed wheels K L and K' L', of the discs O & O¹ fixed on the
wheels K and K¹ respectively and each formed with a curved recess c d and
sectors N & N¹ fixed to the wheels L L' respectively and arranged to work in
the recesses in the said discs substantially as described for the purpose specified.
4. In a rotary pump of the kind referred to in Claim 3 the use for the purpose
specified of friction rollers adapted to bear against the sectors N & N', substan-
tially as described.
5. A rotary motor constructed to work with multiple expansion and with
condensation, the air-pump consisting of a pump constructed substantially as
herein before described.
6. My improved rotary engine constructed arranged and operating substantially
as hereinbefore described with reference to and shewn in Figs. 1 to 4 inclusive of
the drawings.
7. The modified construction of rotary motor or pump in which the blades B C
are mounted to turn on a stationary axle E and are each adapted to be engaged
alternately with the stationary axle and with the motor cylinder which is mounted
to rotate substantially as herein described.
8. A rotary motor in which the motor cylinder is mounted and arranged to
act as a driving pulley and is continuously rotated by the alternate action

page_text: thereon of separate blades B C, the said blades being provided with pistons D.D¹
respectively arranged to work in chambers formed in the blades and provided
with holes such as 9 h, and the said pistons being each provided with a rod
adapted to engage alternately with a fixed notched piece or axle E about which
the blades alternately rotate and with a notch I in the cylinder wall, the whole
constructed arranged and operating substantially as hereinbefore described with
reference to and shewn in Fig. 8 of the drawings.
9. The modified construction of apparatus herein before described with reference
to and shown in Fig. 9 of the drawings and adapted either for use as a pump or as
a motor as set forth.
Dated this 12th dow of Iul. 1902
F. BRÜCKERT,
By L. W., per F. B.
A. DELATTRE,
By L. W., per F. B.