Improvements in Rotary Motors.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Rotary Motors.
I, MAX FRIEDLAENDER of Sellerstrasse 6, Berlin, N., Germany, Manufacturer,
do hereby declare the nature of this invention to be as follows:
The motor of this invention comprises a fixed casing cylindrical in form except
at one part of its circumference where it bulges out so as to form inside a part
cylindrical recess. Held within this casing by an end cover is a crank disc formed
with a laterally projecting cylinder or rim, the combined disc and cylinder being
fixed centrally upon a shaft. Within this cylinder is slid another cylinder which
is fixed to the back end of the outer casing and which at one part of its circumference
has formed in it a recess corresponding to the part cylindrical recess in the outer
casing an forming with the same a cylinder for a rotary wing piston. The cylinder
or rim of the crank disc is free to rotate between the fixed cylinder and the outer
casing so that the crank disc rim cuts through the piston cylinder where it offers
In its rotation the wings
a resisting surface to the steam or other driving medium.
of the piston take through apertures in the crank disc rim the velocity of which is
regulated by the velocity of the piston shaft through toothed wheels. The piston
is fixed on a shaft carried in the ends of the outer casing and the piston cylinder
is provided with suitable inlet and exhaust ports for the steam, which presses
against the wings projecting radially from the nave of the piston.
Dated this 28th day of March 1895.
CAPITAINE & VON HERTLING,
89 Chancery Lane, London, W.C., Agents for the Applicant.
I, MAX FRIEDLAENDER of Sellerstrasse 6, Berlin, N., Germany, Manufacturer,
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 provided with a rotary piston which may be
driven by steam, gas, water, or other suitable medium. The invention mainly
consists in the arrangement within a cylinder of a nave having one or more wings
or lugs radially projecting therefrom and serving as a surface for the driving
mediuin to act upon; further in the combination of said nave with a crank dise
arranged to turn in a casing surrounding the cylinder said crank disc cutting
through the cylinder space with its projecting annular rim which slides steam tight
against the nave and serves as a point of support for the steam whereby the crank
disc upon the rotation of the nave or wing piston is set in rotation from the same
through toothed gearing.
In the accompanying drawing Fig. I is a cross section and Fig. 2 a longitudinal
section of the motor of this invention.

page_text: The
A is a fixed cylindrical casing provided at one part of its circumference with a
part cylindrical bulged out part or enlargement A. Fitting into the casing A
is a cylinder formed by the crank disc B and rim C of the same, said cylinder B, C,
being held in the casing by a cover D screwed or bolted thereto. The cylinder B, C,
is fixed on a shaft E. F is another cylinder slid into the casing A and by means
of a screw stud and nut, firmly fixed to the back end thereof. The cylinder F
has a recess F¹ corresponding to the enlargement A¹ in the casing A, and with
the same forms a cylindrical space in which a wing piston may rotate.
cylinder F is so located in the casing A. that the rim C of the crank disc B may
freely rotate around said cylinder so as to cut through the cylinder formed by the
spaces A, F. The cylinder F is closed at the front end by means of a cover G
screwed thereto and which also serves to carry one end of the crank disc
shaft E. Through the cylinder A', F¹, passes the fly wheel shaft H carried in
bearings in the cover G, back end of cylinder F and casing A, and carrying fixed
upon it within the cylinder A', F', a nave I having one or more wings K serving
as a rotary piston. The driving medium, steam for instance, is supplied through
a pipe L passage M and channel N into the cylinder A. F¹, behind the wing K
and in driving this round has as a point of support or resistance the rim C of
the crank disc B which rim cuts through the cylinder A', F1, and slides steam
tight upon the nave I. In order that the piston K may rotate freely unimpeded
by the rim C, the crank disc B rotating in the casing A is formed with two
diametrically opposite apertures O, O', of such dimensions relatively to the piston
wing K that the latter in its rotation may pass freely through the same, the crank
disc at the same time having motion communicated to it from said piston wing
and nave in the proportion of one revolution of the piston to half a revolution of
the crank disc. To this end there is fixed on shaft H a toothed wheel P engaging
a second and larger wheel Q on a shaft R on which latter but at the opposite end is
also fixed a toothed pinion S engaging a wheel T on shaft E of the crank disc B.
Thus in each revolution of the piston K the crank disc is driven through half a
revolution whereupon the piston comes with its wing K opposite, and is able to
pass through, one of the apertures O or O¹ of the crank disc B where the rim C
passes through the cylinder A', F'. U is the steam exhaust port. For the purpose
of the controlled steam admission to the cylinder A', F', a hollow rotary slide
valve V is fitted in a corresponding chamber formed in the cylinder F, said valve
chamber being in communication with the steam passage M. The valve at one
part of its circumference is provided with an opening y for the passage of the
steam and is attached to a shaft W operated from the piston shaft H through
toothed wheels P and X so that the slide is caused to rotate with the piston. The
opening y is of such a length as to correspond with any desired expansive action
of the steam and in the rotation of the slide and of the piston, said opening is
during a suitable interval in communication with the steam inlet channel N. The
slide valve is open at one end by which it is in communication with the steam
supply passage and is therefore always charged with steam. N' is a groove or
bore in the piston which forms an extension of and comes into line with the steam
channel N.
The motor works as follows:-In the position shewn in Fig. 1 the piston is
being acted upon by steam passing through pipe L into the slide V thence through
opening y and channel N, N¹, to the back of the piston. In this way the piston K
with the shaft H is driven round, and simultaneously therewith also the rotary
slide V through wheels P, X, and the crank disc B through wheels P, Q, S, T.
The admission of steam continues until the whole length of the slide opening y
has travelled past the channel N and the full or closed part of the slide has shut
off the same.
The steam then present in the cylinder must then expand, driving
the piston until the wing K arrives at the steam exhaust port U and permits the
steam to escape and pass out through orifice U. During this movement of the
piston the crank disc B having half the velocity of the piston will have gone such
a distance that the aperture Oi of the rim C comes in front of the wing K which

page_text: can then pass through said aperture and be enabled to continue its rotation in
the space A¹ driven by the momentum communicated to it. Upon the approach
of K to the position of Fig. 1 it gradually draws away from the aperture O¹
and enters the cylinder space F'. Thus the piston and the slide valve have
performed one, and the crank disc half a revolution so that the aperture O is now
in the position shewn in Fig. 1 as occupied by O'. The slide opening y then again
permits the passage of fresh steam to the back of the piston which then performs
another revolution in which the wing K meets and passes through the aperture O
of the rim C when this is passing through the cylinder space A', F¹, and so on.
It is obvious that instead of one wing K the piston may be provided with two
or more wings without it being necessary to make important alterations in the
motor.
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 :-
A motor in which a nave provided with one or more wings to form a rotary
piston is enclosed in a cylinder space said wing or wings serving as a pressure
surface for the driving medium and rotating steam tight in the cylinder, in com-
bination with a crank disc the cylindrical rim of which presents a resisting surface
to the driving medium inasmuch as it obstructs the cylinder space and slides
steam tight upon the nave of the piston, the rim of said crank disc, for the purpose
of permitting the passage of the piston wing or wings past the same being formed
with diametrically opposite apertures, one of which always comes at the opportune
moment opposite a wing of the piston so that this may pass into the same, said
piston for each of its own revolutions operating half a revolution of the crank
disc, substantially as described and shewn.
Dated this 30th day of November 1895.
CAPITAINE & VON HERTLING,
89 Chancery Lane, London, W.C., Agents for the Applicant.