A NEW OR IMPROVED DIRECT ACTING ROTARY ENGINE AND PUMP ALSO APPLICABLE AS A MOTOR
Year: 1882

page_text: LETTERS PATENT to Edward Griffith Brewer of 33 Chancery Lane in
the County of Middlesex for an Invention of "A NEW OR IMPROVED
DIRECT ACTING ROTARY ENGINE AND PUMP ALSO APPLICABLE AS A MOTOR
Communicated to him from abroad by Siegfried Marcus of Vienna Austria.
"
PROVISIONAL SPECIFICATION left by the said Edward Griffith Brewer
at the Office of the Commissioners of Patents on the 25th July 1882.
26
EDWARD GRIFFITH BREWER, of 33 Chancery Lane in the County of Middlesex
A NEW OR IMPROVED DIRECT ACTING ROTARY ENGINE AND PUMP ALSO APPLICABLE
AS A MOTOR (A communication to me from abroad by Siegfried Marcus of
Vienna, Austria)
"
This Invention refers to a direct acting rotary engine applicable as a suction and
forcing pump for liquids and fluids and as a motor.
In a cylindrical box or case an internally toothed ring is provided which is free
to revolve on its central axis in the case; a spur wheel on another axis gears into
the internal teeth of the toothed ring and is put in motion by crank or other
suitable device or means. There is a space between the spur wheel and ring which
is filled by a block secured to the case. This block piece is tightly fitted between
the spur wheel and the toothed ring and between the frames of the cylinder;
passages in the cover communicate with the inlet and outlet pipes and the spaces
between the teeth. The suction and forcing pipes are in connection with the
suction and forcing chambers. When used as a pump the suction pipe dips into
the liquid and the forcing pipe acts as a delivery pipe
If the spur wheel is turned then the ring will turn in the same direction. The
effects of this are that,-1. The area of the teeth spaces immediately on one side
of central tooth is successively augmenting whereby an emptying of the suction
chamber takes place and at the same time the suction of the liquid through its
pipe is produced; at the same time the area of the teeth spaces immediately
on the other side of the central tooth decreases, whereby a compression into the
delivery chamber is produced.

page_text: .
The liquid between the spaces which are augmenting is forced into the suction
chamber through its channel which may be provided either in the cover or in the
bottom of the box. For the same purpose the other channel serves when the pump
is turned in the opposite direction.
2. The liquid between the teeth of the spur wheel and the ring and the block
piece passes continuously from the suction chamber into the delivery chamber.
By increasing the velocity of revolution of the spur wheel, the suction and forcing
power of the pump will also be increased.
By changing the direction of rotation of the wheel and the ring, the pump
will by reason of the entirely symmetrical arrangement of the suction and forcing
chambers work in the same manner, only the function of these chambers will be
changed; what was the suction chamber will now be the forcing chamber and
that part which was forcing chamber will now be suction chamber.
According to a modification the ring carrying the internal teeth may be rotated
which sets the spur wheel in motion. For this purpose a disc is fastened to the
ring which is connected with the crank-axis. The spur wheel which has its axis
The operation of this modified
on the opposite side is journalled into the cover.
apparatus is analogous to that already described.
The number and form of teeth, as also the dimension and the materials for the
different parts, may be varied at will.
"
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edward Griffith Brewer in the Great Seal Patent Office on the
25th January 1883.
EDWARD GRIFFITH BREWER of 33 Chancery Lane in the County of Middlesex
A NEW OR IMPROVED DIRECT ACTING ROTARY ENGINE AND PUMP ALSO APPLICABLE
AS A MOTOR A communication to me from abroad by Siegfried Marcus of
Vienna Austria
"
This invention refers to a direct acting rotary engine applicable as a suction and
forcing pump for liquids and fluids and as a motor.
In a cylindrical box or case an internally toothed ring is provided which is free
to revolve on its central axis in the case; a spur wheel on another axis gears into
the internal teeth of the toothed ring and is put in motion by crank or other
suitable device or means. There is a space between the spur wheel and ring which
is filled by a block secured to the case. This block piece is made a good close fit
between the spur wheel and the toothed ring and between the frames of the
cylinder; passages in the cover communicate with the inlet and outlet pipes and
the spaces between the teeth. The suction pipe and the forcing or delivery pipe
are in connection with the suction and delivery chambers. When used as a pump
the suction pipe dips into the liquid and the forcing pipe acts as a delivery pipe.
In the annexed drawing Figures 1 and 2 represent a direct acting rotary

page_text: machine which may be made use of as a suction and force pump for liquids and
fluids as also as a motor if liquids are forced through it.
Figure 1 is a front elevation of the rotary machine, the cover F being taken off,
Figure 2 is a cross section of it when employed as a pump.
Figure 3 shows a modified form of the same in section on the line ab in
Figure 1.
•
A is a cylindrical box or case in which the internally toothed ring B turns
freely round its geometrical axis. C is a spur wheel gearing with the teeth of the
ring A.
The spur-wheel C is set in motion either by a crank or by any other suitable
device or means. The free space between the wheel C and the ring B is by the
block piece K which is fastened to the box divided into two parts G and H which
form the suction and delivery chambers of the pump respectively.
The block piece K is made a good close fit between the spur-wheel C and the
toothed ring A and between the side walls of the box A and F. The spaces
between the teeth a ẞ, a' B¹ communicate with the space G H through ports or
channels provided in the cover, which will be afterwards described.
The pipes L and M fixed to the box serve as suction and delivery pipes which
respectively communicate with the suction and delivery chambers G and H of the
pump.
To set the rotary machine in motion as a pump the lower end of the suction
pipe is put into the liquid to be raised and the pipe M serves as delivering pipe.
If the wheel C is turned as indicated by the arrow Figure 1 then the ring B will
turn in the same direction. The effects of this are that-
1. The volume of the teeth spaces a B is successively augmenting whereby an
evacuation of the suction chamber G and at the same time the sucking of the liquid
through the pipe L is produced; at the same time the volume of the teeth
spaces a decreases whereby a compression in the delivery chamber H is pro-
duced. The liquid between the spaces a B is forced into the suction room through
the channel or port n which may be provided either in the cover or in the bottom
of the box. For the same purpose serves the channel p when the pump is turned
in the opposite direction. In the drawing these channels are shown by dotted
lines.
2. The liquid between the teeth of the wheel C and the ring B and the block
piece K passes continuously from the suction chamber G into the delivery space H.
By increasing the velocity of revolution of the wheel C, the suction and forcing
power of the pump will also be increased.
By changing the direction of rotation of the wheel and the ring, the pump will
by reason of the entirely symmetrical arrangement of the suction and delivery
chambers work in the same manner, only the function of these chambers will be
changed, what used to be the suction chamber will now be the delivery chamber
and that part which was delivery chamber will now be suction chamber.
Figure 3 shows a modified forin of the described rotary machine or engine. In
the arrangement shown in Figure 2, the wheel is to be turned directly and the
ring B bas to be set in motion by the wheel C but in the case of Figure 3 the
ring B has to be turned which sets the wheel C in motion. For this purpose a
disc B is fastened to the ring B and is connected with the crank shaft D. The
wheel C which has its axle E on the opposite side has its axle bearing in the
cover F. The function of this apparatus is entirely analogous to that already
described.
The number and form of teeth as also the dimension and the materials for the
different parts may be varied at will.
Having now described the nature of the said invention, I claim,
First In a rotary pump a uniformly toothed spur-wheel gearing with an
internally uniformly toothed ring which is enclosed in a box or cylinder and
adapted to turn freely round its geometrical axis close against the inner periphery
of the cylinder so that when the spur-wheel is set in motion by a crank or

page_text: otherwise, the ring also is turned, in combination with a block piece which divides
the free space between ring and wheel in two separate chambers, one of which
works as a suction chamber and the other one as a delivery chamber, the
admission and discharge taking place at the bottom of the pump and the
circumference of the same being entirely closed.
Second An internally uniformly toothed ring fitting closely within the inner
periphery of a box or cylinder and gearing with a uniformly toothed spur wheel,
so that when the ring is set in motion by a crank or otherwise, this motion is
imparted to the spur-wheel, in combination with a block piece, which divides the
free space between ring and wheel in two separate chambers, one of which is
working as a suction chamber and the other as a delivery chamber, the admission
and discharge taking place at the bottom of the pump and the circumference
of the same being entirely closed substantially as set forth and shewn in the
drawing.
Third A direct acting rotary engine or motor consisting of a cylindrical case, in
which is arranged an internally uniformly toothed ring which is adapted to turn
freely round its geometrical axis and closely against the inner periphery of the case
and gearing with a uniformly toothed spur-wheel of smaller diameter than that of
the ring, in combination with a block piece inserted fluid tight between the teeth of
the ring and those of the wheel and dividing the crescent shaped space between
wheel and ring into two separate chambers, into one of which a liquid or fluid
under pressure is forced through a force pipe, whereby spur-wheel and ring are
caused to turn whilst the waste liquid or fluid is flowing away through a discharge
pipe communicating with the other of the said chambers, substantially as described
and shewn in the annexed drawing.
Fourth In a pump or direct acting rotary machine of the above described kind
the construction of the cover closing the case and provided with two channels by
which communication between the teeth spaces and forcing and suction chamber is
established.
In witness whereof I the said Edward Griffith Brewer have hereunto set
my hand and seal this Twentyfifth day of January in the year of our Lord
One thousand eight hundred and eighty three.
EG BREWER
(L.S.)