New or Improved Reversible Rotary Steam Engine.
Year: 1899

page_text: Date of Application, 28th. Sept., 1899-Accepted, 2nd Dec.,
1899
COMPLETE SPECIFICATION.
New or Improved Reversible Rotary Steam Engine.
We, HEINRICH FEY and LOUIS SAILER, both of 41, Newman Street, Oxford
Street, London, W., Tailors, 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 improvements in reversible rotary steam engines
and has for its object to construct a machine of that class by aid of which a
considerable increase of general efficiency is attained than is possible in
machines of similar type hitherto known.
To this end the novelty of the present invention essentially consists in the
construction, combination and arrangement of the component parts of the
machine, as will hereinafter be fully described and particularly pointed out.
The advantages are: great speed and increase in the number of revolutions;
reduced consumption of steam and therefore great saving in fuel, easy manage-
ment of and reliable and prompt action of the reversing gear and of the stopping
appliances, and, finally very steady working.
And in order to render the invention more readily understood I have here-
unto attached two sheets of drawings, throughout the figures of which the same
letters of reference indicate the same or corresponding parts.
Fig. 1 is a vertical section of the machine.
Fig. 2a transverse section of the same, the driving gear and shafts as well
as the steam supply and escape, reversing and regulating gear being shown in
elevation.
Fig. represents the cover plate of the steam-chest, showing the steam
supply and exhaust-ports.
Fig. 4 and 5 are schematic representations of the position of the pistons in
their starting positions respectively for working from the left to right, and
from right to left.
The machine frame consists of casing a suitably secured to a stone-or other
base or foundation b by means of bolts and nuts or in analogous and efficient
fashion, and cover plates or cylinder heads d and e having bearings and
ele cast integral with said cover plates; plates d and e are to be firmly and
steam-tightly secured to casing a by means of screw bolts for the like.
Within the casing a there are located two rotary pistons P¹ and P² mounted
on shafts S1 and S2, the latter being journaled respectively in bearings and e¹,
and and e. Both pistons are made of the same diameter, 1" being placed
in the upper portion of the steam chest the bore of which is of greater diameter
than the piston so that an open circular channel is left free between the inner
surface of the said steam chest and the periphery of piston P¹, while the second
piston I occupies the, lower and narrower bore of the steam chest, the latter
bore being of but slightly larger diameter than the piston, allowing of the free
rotary movement of the piston while the peripheral surface of the latter closes
steam tightly against the surface of the bore.
Piston P has radially secured to its peripheral surface a valve or vane ?,

page_text: vane P
revolving.
preferably consisting of face plates pp', and packing and having a width
corresponding to that of the piston and a length corresponding to the
measurement of the aforesaid circular channel or cylinder, so that the said
is adapted to entirely close the circular channel while piston 1" is
Piston P is provided with a transverse groove having the section of a
segment of a circle, its depth being slightly in excess of the length of aforesaid
vane of piston P, so that the vane p will enter the groove in the corre-
sponding part of the revolution of the pistons.
On the portions or ends of shafts S and S projecting from journals
and are mounted toothed gear wheels G, and G₁ serving to convert the
opposite energies of revolving pistons P1 and P2 in one direction, transmitting
the aggregate power to pulley W mounted on shaft S¹, and to maintain
pistons and P in their proper positions relative to each other.
The attachment H comprising steam supply valve connected with pipe I,
reversing valve operated by button or handle R, and exhaust port E is of
known construction and is secured by screw bolts or the like to cover plate
or head e in such manner as to lie in proper position over ports 1 and 2 pro-
vided in cover plate e (Fig. 3). The said parts are so disposed that they will
open on the sides of the point where pistons P' and P2 come into contact, the
contact therefore separating the ports from each other and preventing com-
munication.
The casing may in its lower portion be provided with bores g' adapted
to receive an asbestos or other suitable packing which may be made to slightly
protrude through longitudinal slits communicating with bores and the
chamber in which piston P2 is revolving, in order to effect a close fit of the
peripheral surface of the aforesaid piston and the chamber. The said packings
may further serve as conveyer for the necessary lubricating medium.
Upon steam being admitted through port 1 (Fig. 3), when the pistons are
in position as shown in Fig. 4, it enters the chamber formed between vane p
of piston and the contact point of both pistons and there expands causing
the pistons to revolve in the direction indicated by arrows, and will escape
through port 2. If however the reversion gear is operated and steam admitted
through port 2 (Fig. 3) the same process as before described will take place
on the other side of contact point of the pistons (the latter occupying the
position shown in Fig. 5) and upon completion of the revolution of the pistons
the spent steam will escape through port 1.
By means of toothed gear wheels and the latter of which is mounted ou
the end of shaft S2, while the former is connected with steam supply valve I
in any suitable known manner, the influx of steam into cylinder is regulated
and made dependent on the revolution of the pistons.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
A new or improved reversible rotary steam engine in which two superposed
pistons of equal diameter are made to revolve in opposite directions their
aggregate energy being made to work in one direction by means of transmission
gear, the whole constructed combined and arranged as herein before described
and illustrated in the drawings.
Dated this 2011 ...
1000