An Improved Rotary Motor.
Year: 1893

page_text: Date of Application, 17th Mar., 1893
Complete Specification Left, 18th Dec., 1893-Accepted, 3rd Feb., 1894
PROVISIONAL SPECIFICATION.
An Improved Rotary Motor.
We, CARL KARPA of Rostockerstr., and EMIL LANGE of Ilehnerstr., Berlin in
the German Empire, both Machine Builders, do hereby declare the nature of this
invention to be as follows:-
This invention relates to a rotary motor that may be driven by steam, gas or
water. It consists substantially in an arrangement within a cylinder of a crank
pulley like wing piston provided with two or more projections or lugs extending
inwardly towards the centre of the cylinder. These projections slide steam tight
round a cylindrical surface provided within the cylinder when alternately impinged
against by the driving medium. The wing piston thus formed is mounted upon the
driving shaft of the motor. In a recess formed in the cylindrical part on which the
piston wings slide there is carried on a shaft passing through the cylinder casing a
star like toothed wheel one of the teeth of which always shuts off the cylinder
space steam tight and presents a resisting surface to the driving medium but when
struck by a wing of the piston is turned so that the wheel also turns on its axis
whereupon the next following tooth closes the cylinder space and allows the wing
to pass, whilst two other teeth of the wheel so fill up the recess as to form a
continuation of the cylindrical sliding surface for the wings of the piston to
slide upon.
Din 17th love of March 1902
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicants.
We,
CARL KARPA of Rostockerstr., and EMIL LANGE of Hehnerstr., Berlin,
in the German Empire, both Machine Builders, 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 a motor having a rotary piston that may be driven by
steam, gas, water, etcetera, steam driving being described by way of example. The
invention consists substantially in an arrangement within a fixed cylinder of a
cylindrical piston provided with two or more wings or projections extending
inwardly towards the centre of the cylinder and presenting a suitable surface to
the steam pressure; further in the combination with the wing piston of a toothed
wheel mounted to rotate in a recess formed in an internal cylindrical nave the
several teeth alternately serving to shut off the cylinder space and presenting a
resisting surface to the steam pressure, its rotation being effected from the driving
shaft through a special mechanism, or by the striking of the piston wings against
the teeth of the same.
In the drawing,
Fig. 1 is a longitudinal section of the motor of this invention and
Fig. 2 an end view of the same with cover removed and partly in section.
Fig. 3 is an end view of the lever mechanism for operating the steam admission

page_text: A is a fixed cylinder B a disc in firm attachment with or in one piece with a
hollow cylinder which latter is provided with wings or cranks C, (, said disc,
hollow cylinder and wings forming a rotary piston which is keyed on to driving
shaft Ent the nave of disc B. The rotary piston thus formed is held in cylinder A
by cover D and also guided steam tight in its rotary motion by dise D' of nave F
and by dise D which parts are slid into the hollow cylimler and held fixed, the
driving shaft E passing loosely through them. Between the nave F and cylinder e
there is an annular space (the bottom surface of the wings C, C, sliding steam
tight over said nave. This latter is formed with a recess H in which a toothed
wheel I so rests that its teeth bear closely against its surface and shuts it off from
the space G, further the teeth are of such a length that they project into this space
and in the position shown in Fig. 2 of the drawing completely shut off the same
and present a resisting surface to the entering steam. A special stop mechanism
for toothed wheel I is not required as it is prevented from turning by the steam
which presses with equal force upon teeth 1 and 4. Wings C, C, are of a form
corresponding to the teeth of wheel I so that in revolving round the have they may
bear steam tight against the tooth projecting into space G and carry it with the
whole wheel round on its axis and open a passage each wing for itself, but in
practise it is preferable to effect the turning of wheel through a mechanism
nctuated from the driving shaft E of the motor, in order to prevent the striking of
the wings against the teeth. When one tooth of wheel 1 shuts off space G, the
two teeth next to it one on each sile-fill up the recessed part of nave F and
like this serves as a sliding surface for the wings and to prevent the passage of the
steam to the other side of the cylinder. d, d', are orifices for the discharge of any
atmospheric air present in space G, d serving for right hand and d for left hand
driving. The exhaust takes place through orifice in the hollow mave F and thence
through an orifice to the atmosphere. Steam admission takes place through
the bass of wheel which for this purpose is maste hollow and with radial
orifices, ƒ³, one, orifice between all the several teeth. Into the boss of
wheel and an extension thereof is slid a tube g' which at its back end
has a slot so arranged that it may by turning the tube he placed in
communication with one of the radial orifices, tube g being so adjusted to
turn in the boss of wheel I that it either communicates with one of the radial
orifices or is shut off by the wheel. In the former case steam passes into
space and in the latter ense is cut off. The outer end of tube is closed and
carries a shaft extension is the steam supply pipe from which steam passes
into tube g through perforations in the same. This end of tube is carried
steam tight by means of stuffing boxes h, h'. At the end of its shaft like extension &
there is fixed a crank / jointedly in connection with a double lever a mounted to
Said lever is held drawn by a spring o against a di-e or camp fixed on
the end of driving shaft E. The dise p has two projections p², ¿ë, which upon each
revolution of shalt E move lever a twice away from it. In this way the crank !
performs two to and fro movements and thereby turns tube twice forward and
back again in ench revolution of the driving shaft E. By the oscillation of tube g
the steam is expanded.
turn on 7.
g
into
The motor works as follows:-Taking the position of the working parts to be
that of Fig. 2, the driving is to the right. Projection p' presses levern away
from the disc p whereby tube is so moved by crank 1 through lever n that slot g
communicates with orifice in wheel 1 and the steam passes from tube
annular space G between tooth and wing C. Outlet dis closed simultaneously
with the opening of a steam inlet valve in steam pipe K the wing (therefore
moved forward by the steam pressure and disc B and slinft E set in rotary motion.
The steam admission now continues until lever n stiles off projection p' and is
drawn by spring o ngainst disc p, tube g being then slid round through crank / in
the direction shewn by the arrow and slot covered by wheel I, the steam then
expands. The more wing ( moves away from wheel I the nearer does C' approach
the same from the other side, the atmospheric air, etcetera in front of the same

page_text: escaping through outlet d and after the wing has passed this by, the air still
remaining in the space between the wing and toothed wheel being compressed and
serving to prevent the hard striking of the wing against the tooth by acting as a
buffer. In this way the wheel 1 is caused to make part of a revolution before the
wing comes against the tooth. At the moment wheel I turns on its axis the expanded
steam passes through the exhaust outlets e, e', the former of which must have such
a position that as soon as the toothed wheel begins to make a turn the corre
sponding wing has opened it. As now wing C¹ drives tooth 1 of wheel I before it,
said tooth comes into the position shewn as occupied by tooth 4 and tooth 2 into
that previously occupied by tooth 1. The wing now stands behind orifice" in
wheel through which orifice steam can pass and press against it as the
projection p of disc p has again so set the tube y that slot y' communicates with
orifice f.
With left hand turning tube g is so set that slot g¹ communicates with orifice /'
and a second lever n provided which operates in a reverse direction to the one
described. Simultaneously the orifice d is closed and opened. Steam then
passes between the corresponding teeth of wheel I and the wing and drives this
round to the left.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A motor in which a disc, cylinder, and two or more wings forming a wing piston
are enclosed in a cylinder said wings projecting towards the centre of the cylinder
and alternately receiving the pressure of the steam and sliding steam tight over a
central nave in combination with a toothed wheel located to turn in a recess of the
nave, of the four teeth of which wheel one always shuts off the cylinder space
steam tight and presents a resisting surface to the steam, this one upon the
striking of a wing being carried round with it so that the toothed wheel turns on
its axis whereupon the next following tooth shuts off the cylinder space and
allows a passage to the wing whilst two other teeth fill up the recess of the
nave and serve the wings as bearing surface, substantially as described and shewn.
2. In a motor provided with the wing piston referred to, means for regulating
the steam admission consisting of a tube g slid into the nave of toothed wheel I so
as to be capable of turning therein and actuated from driving shaft E through
lever mechanisin, said tube y having a slot or port gl so arranged that upon being
turned, steam is either admitted through orifices f,,,, in toothed wheel I or
is cut off, substantially as described and shewn.
g
Dated this 18th day of December 1893.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicants.