Improvements in Rotary Engines.
Year: 1899

page_text: Date of Application, 25th Feb., 1899-Accepted, 25th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Rotary Engines.
I, GERHARD VAN DER VIJGH, of No. 2, Toussaintstraat, Bosboom, Amsterdam,
in the Kingdom of the Netherlands, Manufacturer, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement;-
-
This invention relates to engines in which the steam or other fluid acts directly
on a rotary piston which has two rows of recesses closed steam tight against one
another, and is arranged in a cylinder which is adapted to distribute the live steam
or equivalent fluid required by one row of recesses, and also to distribute the fluid,
thus used over the second row of recesses. By working thus expansively the work-
ing is rendered very economical.
In order that this invention may be the better understood, I now proceed to
describe the construction of a motor made in accordance with this invention.
Reference is had to the accompanying drawings and to the letters and figures
marked thereon.
Figures 1 and 2 show each a vertical section through two different parts of the
casing.
Figure 3 is a side view, the casing being partly removed.
Figure 4 is a part sectional plan, the fluid admission part being shown.
The engine consists essentially of a cylindrical casing a and a piston c rotating
therein on an axle f. As shown in Figure 3 the surface of the piston bears
steam tight against the inner side of the casing a and is provided with two rows
of recesses dd', one of which rows is preferably made narrower than the row d¹.
Between the rows of recesses d there remains a smooth strip b, fitting steam
tight against the cylinder. The surfaces which bear against the cylinder may be
packed with any suitable packing to make the joints as tight as possible.
A fluid admission orifice g, Figures 1 and 4, is arranged in the casing opposite
the row of recesses d, and is connected with a channel h extending over about
a quarter of the periphery of the casing a, and having a number of fine exit holes i
to the interior.
A tube starts over an orifice p in the side of the casing, under which rotates
the row of recesses d and ends over an orifice o provided over the row of recesses d¹
in the casing a. This orifice is connected, similarly to the channel h, with a
channel h¹, which has also steam exits 2¹ towards the piston c. At the bottom of
the casing a is provided a chamber m from which the superfluous steam or other
fluid can be led by two short pipes 1, 1.
The action is as follows:
The live steam is admitted through the short pipe g into the channel h, escapes
therefrom through the slot orifices and meets the sides of the recesses of the
row d. It rotates the piston e the fluid which has entered the recesses d is carried
away and can only escape under the orifice p. The steam or other fluid has not
given up all its force when meeting the recesses & and after passing through the

page_text: pipe the remaining force is excited on the second row of recesses d' which offer
a larger surface than the first row to completely utilize the pressure of the fluid.
The spent steam then passes through pipes to be condensed if desired, in
which case suitable condensers are provided. A stop valve and an exit valve
may be arranged in the pipe or channel and the engine may be worked without
expansion. The number of recesses varies according to the desired number of
revolutions and the number and size of the exit orifices is also adapted to circum-
stances.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what I
claim is:
1st. An engine with rotary piston having a piston c, provided with two rows of
pockets dd, and a strip b between the said pockets to make a tight joint with the
interior of the motor casing a, the piston e being adapted to rotate in the casing as
which has a side orifice g, a pipe k and exit pipes to utilize the whole expansive.
force of the steam or other fluid, substantially as described.
2nd. An engine as claimed in Claim 1 in which the steam or other fluid is
lead through channels h¹ around the larger part of the surface of the piston to
be admitted to the piston through a number of small channels or orifices ito
act in jets on the rows of pockets of the piston-a-substantially as described.
Τ
11
1
1000