Improved Rotary Engine.
Year: 1899

page_text: Date of Application, 7th Mar., 1899-Accepted, 2nd June, 1899
Improved Rotary Engine.
We, ANTONIN VOZIHNOJ, of Tistin, near Nezamislitz, in the Empire of Austria,
Miller, and JAKUB PRECECHTĚL, of Kremsier, in the Province of Moravia, in the
Empire of Austria, Machinist, 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;.-
In the steam motor which forms the subject of the present invention the steam
piston moves in a continuous circle, and transmits its motion direct to the main
shaft of the motor.
In the accompanying drawings this engine is illustrated as follows;
Fig. 1, is a front view with part of casing removed.
Fig. 2, is a section on the line of Fig. 1.
Fig. 3, is a plan of the same.
On the pedestal frame L, there is fixed firmly an annular casing g having a
slit on the inner side, and of which the hollow space a serves for a steam-
cylinder. The piston d, which slides in the hollow space c, is connected with
the boss, (which is keyed on the main shaft w) by the connecting piece & fitting
in the sloth, so that the motion of the piston d is communicated direct to the
shaft w.
The casing
is enlarged in front of the steam inlet e and this enlargement
forms a valve-box for the corresponding valve t. The valve-rods s are connected
with pistons in the cylinders g¹ and are provided with projections at their
outer ends. On each of the two pulleys which are fixed on the main shaft
there is a disc m fixed which has a curved cam k.
The method in which the machine acts is as follows:-
In the initial position the valves remain closed by help of the springs f and
the piston is close behind the steam inlet e, so that a space o is apparent closed
in by the valves t, the steam piston d and the sides of the casing (Fig. 1). If
steam be allowed to enter by the inlet e by means of any kind of valve arrange-
ment, not shown in the drawing, then the piston d moves forward and with it
the main shaft win the direction of the arrow in Fig. 1 since the steam can
expand in this direction only.
At the instant when the piston d has passed the steam-outlet or exhaust a
the steam remaining in the cylinder c behind the outlet will be condensed in any
well known way and at the same time the valves t opened, in order to let the
piston d pass through. The motion of the piston d from the steam outlet a till
it gets behind the steam inlet e will be effected by the vacuum produced by the
condensation and, to a still greater degree, by the inertia of the rotating mass.
The opening of the valves in order to let the steam-piston d pass through is
caused by the cams & attached to the discs m pushing back the projections and
along with them the valves t. As soon as the piston has gone past the opened
valves the cams liberate the projections i, the valves & close by the action of
the springs f and from that instant a fresh admission of steam is allowed
through e.

page_text: It is manifest that instead of two valves t only one may be employed; but the
arrangement with two valves is more advantageous, as they have then a shorter
path to traverse in order to allow the piston a to pass.
In the motor here described compressed air or gas may be used instead of
steam as a motive force.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that
what we claim is:-
1. A rotary motor constructed with an annular casing y a steam piston d con-
nected to the boss n of the main shaft w by a connecting piece passing through
a slit in the casing which moves in a circular path under the pressure of steam
admitted through the inlet e substantially as described.
2. In the rotary motor specified in Claim 1 an arrangement for forming a
chamber o in front of the piston d so that the latter can be urged on by the steam
entering through the inlet e, consisting of valvest acted on by the springs f and
sliding in the casing which shut up the chamber o before steam is admitted and
are opened for the purpose of allowing the steam piston to pass by means of
cams & acting against projections on the valve-rods s substantially as described.
3. A rotary motor constructed and arranged substantially as described and
shown.
Dated this 4th day of March 1890
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.