Year: 1887

page_text: We, GUSTAV DIETZ and EDWARD TAMSEN, of Hamburg, in the Empire of Germany,
Engineers, 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:-
We, GUSTAV DIETZ and EDWARD TAMSEN, of Hamburg, in the Empire of Germany,
Engineers, 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 the construction of rotary engines with
annular cylinder space.
In the accompanying drawings,
Fig. 1 is a view of the improved engine.
Fig. 2 a cross section.
Fig. 3 shows the engine partly in cross section partly with the cover removed.
Fig. 4 is a plan in cross section.
Figs 5-8 are details
Figs. 9 and 10 a modification.
In the stationary cylinder ring R of rectangular cross section move the pistons K K',
which are connected through arms m and disc m¹ with the axle A. The disc rotates
with its outer rim in a slit of the inner cylinder wall and is tightened against the
same in the manner hereinafter described.
The steam enters through valve V and a channel in the cylinder mantle into the
slide boxes T and hence through bores a and b, according as the engine is to work
forward or backward, into the cylinder. Between the bores a and b is situated a
closing slide S or S¹, which, when drawn out, allows the piston to pass freely, while
it closes again, after the piston has passed. When, for instance (Fig. 3) the steam
enters through the bores a into the cylinder, the piston K and also Kis driven round
in the direction indicated by arrows.
As soon as the piston K arrives at the stationary head S', the latter is raised, and
after K has passed, is closed again. The stean entering through a behind S³, drives
the piston farther forward up to the stationary head S, whereupon the latter is raised.
The exhaust steam escapes through the channels b and leaves the engine at VI.
The entrance and escape of the steam is regulated by means of slides, which are
moved by means of eccentric Z from the main axle A as shown in Figs. 1 and 8. In
the latter figure the upper part of the slide box is supposed to be turned for 90°.
By the three-ported slide-valve o which can be reversed by means of the rod-
gear 1, 2, 3, 4 and 5, the channels a and b are made steam-inlet-or outlet-channels,
according as the engine is intended to work forward or backward. The exhaust
steam leaves through channel. The entrance of the sieam through channel i, into
the lower part of the slide box and hence into the cylinder is regulated by the slide p
moved by the eccentric Z, and the degree of expansion, by the slide 7.
Figs. 9 and 10 a modification.
In the stationary cylinder ring R of rectangular cross section move the pistons K K',
which are connected through arms m and disc m¹ with the axle A. The disc rotates
with its outer rim in a slit of the inner cylinder wall and is tightened against the
same in the manner hereinafter described.
The steam enters through valve V and a channel in the cylinder mantle into the
slide boxes T and hence through bores a and b, according as the engine is to work
forward or backward, into the cylinder. Between the bores a and b is situated a
closing slide S or S', which, when drawn out, allows the piston to pass freely, while
it closes again, after the piston has passed. When, for instance (Fig. 3) the steam
enters through the bores a into the cylinder, the piston K and also is driven round
in the direction indicated by arrows.
As soon as the piston K arrives at the stationary head S', the latter is raised, and
after K has passed, is closed again. The steam entering through a behind S', drives
the piston farther forward up to the stationary head S, whereupon the latter is raised.
The exhaust steam escapes through the channels b and leaves the engine at VI.
The entrance and escape of the steam is regulated by means of slides, which are
moved by means of eccentric Z from the main axle A as shown in Figs. 1 and 8. In
the latter figure the upper part of the slide box is supposed to be turned for 90°.
By the three-ported slide-valve o which can be reversed by means of the rod-
gear 1, 2, 3, 4 and 5, the channels a and b are made steam-inlet-or outlet-channels,
according as the engine is intended to work forward or backward. The exhaust
steam leaves through channel i. The entrance of the sieam through channel, into
the lower part of the slide box and hence into the cylinder is regulated by the slide p
moved by the eccentric Z, and the degree of expansion, by the slide

page_text: The pistons K K' are formed in cross section outwardly diminished, as shown by
Fig. 3, and the heads S S¹ converge to a point inwardly, whereby a more precise
closing of the valve is attained, as the distance between the piston and the slide before
and after the stroke of the latter is restricted to a small measure. The pistons have
in the breadth the rectangular shape of the cross section of the cylinder and are
tightened by means of the elastic steel rails 7 (Figs. 3 and 6) while the stationary
heads are guided with beads t in notches n (Fig. 8) of the cylinder wall.
The movement of the heads S S' is effected as shown by Figs. 4 and 5, from the
cam disc G, on which slides the roll c of the lever d which imparts its motion by
means of rod e and lever f to the slide rod g of the slide.
The abovementioned tightening of the disc m¹ against the cylinder ring R is
effected as follows:
In the construction shown in Fig. 2, the rings x and y are pressed by means of
screw against the packing, thus preventing the steam from escaping from the edge
of the disc m'. In the arrangement shown in Figs. 6 and 7, the springs to effect the
tightening pressing the rings outward from the disc m¹ against the walls u¹ u³
attached to said discs by bolts u and against the inner surface of the cylinder wall.
The latter arrangement is preferably employed in such cases where one side of the
engine is not accessible, for instance if it is constructed as a compound engine.
Figs. 9 and 10 of the drawing represent a modification, in which the channels a
and bare placed in the space above the head S or S¹. The entering steam arrives
through openings a¹ or b¹ in the cylinder R. This arrangement has the advantage
that the piston can receive the full steam pressure immediately after closing the slide,
while this could only be effected after passing the channels a or 6 in the afore-
mentioned construction.
To separate the channels a and b from each other, the cross wall S is arranged
and guided through the stuffing box D for operation by the rod for moving the
head.
Having now particularly.described and ascertained the nature of this invention, and
in what manner the same is to be performed, we declare that what we claim, is:
In a rotary engine :
7
1) The combination of the slides o, p and q moved by rods 1 to 5 or eccentric Z
for regulating the entrance of steam into the cylinder-ring.
2) The combination of the pistons K K and of the heads S S', the pistons being
diminished outwardly, while the heads converge to a point inwardly, substantially as
and for the purpose set forth.
3) The tightening of the disc m³ carrying the pistons against the cylinder-space.
a) By means of packing z rings xy and screws h.
b) By the combination of springs w rings » and ring walls u² u², substantially as
set forth.
"
4) The inlet and outlet ports a b above the heads S S' in combination with the
openings a b¹ in the head-walls substantially as set forth.
Dated this 8th day of November 1887.