improvements in Rotary Motors.
Year: 1897

page_text: Date of Application, 3rd Mar., 1897-Accepted, 3rd Apr., 1897
improvements in Rotary Motors.
A communication by WILHELM EDUARD MARX, of 19, Hochstrasse, Halle, in
the Empire of Germany, Technologist.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, 118 New Street, Birmingham, in
the County of Warwick, and 322, High Holborn, in the County of Middlesex,
Civil 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 has for its object a rotary motor for working with steam,
compressed air or the like, and in which the steam or working fluid works with
expansion. The motor is also arranged as a compound motor and may be made
as a simple or duplex motor.
The invention will be described with reference to the accompanying drawings,
in which :-
Figure 1 is a vertical section showing the internal arrangement of the rotary
motor,
Figure 2 a central vertical cross section of the same,
Figure 3 a rear elevation showing the arrangement of the overflow passages.
Figure 4 a central vertical cross section of a duplex motor.
A fixed flat disc a mounted on a suitable base is provided with concentric rings b
and c and with a concentric core d. In the concentric interstices e and thus
formed, there engage two concentric rings g and h of a revoluble flat disc k which
is mounted eccentrically to the flat disc a and fixed on a motor shaft i. This disc k
is so eccentrically mounted relative to the flat disc a that the concentric rings g
and come in contact in one direction with the inner or outer surface of the
concentric rings b and c and core d of the flat disc a. In this manner there are
formed between the rings crescent-shaped working chambers e eff¹. Plates m
are arranged radially movable side by side in the rings g and h, the length of which
plates is equal to the width of the concentric interstices situated between the
rings b and c and the core d. These plates which are movable in the rings have
for their object to divide the crescent shaped working chamber into two parts one
for the expansion and the other for the discharge. The plates m act thus in the
manner of a piston. As the rings of the two flat discs stand eccentrically to one
another, the various working chambers alternate and there is simultaneously an
always varying endwise reciprocation of the two plates.
The working chambers are mutually connected by means of passages indicated
in the drawings by figures so that steam passes from one working chamber into
another, and acts to the same extent as in a compound engine. The rear side of
the motor is covered with a plates in order to facilitate the arrangement of the
passages.
The mode of working of this motor is as follows:-
The high pressure steam is conveyed in the direction of the arrow by means of
a feed pipe y. It passes through the inflow passages 2 and 3 into the working
chamber, presses against the plates m and causes a rotation of the flat disc k and

page_text: shaft in the direction of the arrow p. When the affected plates m come behind
the discharge passage 4, the expanded steam passes through the passages 4, 5 and 6.
into the working chamber f¹, where it acts in a similar manner. In the meantime
however fresh steam flows into the working chamber f. The further expanded
steam in the working chamber passes through passages 7, 8 and 9 into the
working chamber e, acts there by means of its expansion, passes through
passages 10, 11 and 12 into the working chamber e¹ and after it has been expanded
almost to atmospheric pressure, escapes through a passage x. The motor revolves
therefore in the direction in which the steam enters. The motion of the motor is
a constant and even one. The expanded steam engages on an always increasing
radius, so that an equal pressure takes place on all parts.
In the form of construction shown in Figure 4 the motor is formed as a duplex
motor. For this object the outer rings b of the two fixed flat discs a are provided
with flanges o. Between the two flat discs a, a flat disc k shaped out at both sides
is revolubly mounted. The passages and the concentric rings are in both cases
arranged in a similar manner. It is advisable in the case of duplex arrangement
to make the shaft i pass right through. The mode of working is the same as
before described.
In the form of construction shown in Figures 1-3 no washer is necessary
between the rotary flat disc k and the fixed disc a, as the circumferential speed is
so great that the expanded steam forms a rotary, ring between the movable parts
which does not allow the internal steam to pass through.
The motor may be operated by compressed air or other suitable expanding
mixture of gases instead of steam.
The number of rings on the discs may be varied as desired.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is,-
1. A rotary motor for working with steam, compressed air or the like,
characterised by a rotary flat disc (k) connected with the motor shaft and having
one or more rings concentrically fixed or formed on it, being mounted with its
rings engaging in annular chambers formed in a stationary flat disc (a) by two or
more rings concentrically fixed or formed on said stationary disc which forms a
casing, the discs being arranged eccentrically to each other, and one or more
sliding plates (m) acting as pistons being arranged diametrically opposite one
another in said annular chambers in constant contact with the outer and inner
periphery thereof so as to produce expansion and discharge working-chambers
(ffe, e) which are so connected by passages (4, 5, 6; 7, 8, 9; and 10, 11, 12
respectively) that the medium of power such as steam, compressed air or other
suitable expanded mixture of gases is caused to act in an equal direction of rotation
on the internally and outwardly projecting parts of the pistons (m), substantially
as described.
2. A form of construction of the herein described rotary motor arranged as a
duplex motor, in which the rotary flat disc (k) is provided on both sides with
rings (h and g) and is mounted to rotate between two stationary flat discs (a)
provided with concentric annular chambers substantially as described.
Dated this 2nd day of March 1897.