IMPROVEMENTS IN THE CONSTRUCTION OF PISTONS FOR ROTARY ENGINES AND PUMPS, AND IN PARTS CONNECTED THEREWITH.
Year: 1875

page_text: LETTERS PATENT to Gustav Schrebler, of Guben, in the Kingdom of
t
Prussia, for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION
OF PISTONS FOR ROTARY ENGINES AND PUMPS, AND IN PARTS CONNECTED
THEREWITH.
"
Sealed the 4th May 1875, and dated, the 9th February 1875.
PROVISIONAL SPECIFICATION left by the said Gustav Schrebler at the
Office of the Commissioners of Patents, with his Petition, on the
9th February 1875.
I, GUSTAV SCHREBLER, of Guben, in the Kingdom of Prussia, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
THE CONSTRUCTION OF PISTONS FOR ROTARY ENGINES AND PUMPS, AND IN PARTS
"
CONNECTED THEREWITH :-

page_text: cylinder exactly; these lugs rest against one another. On the inner
side of each cylinder cover there is a guide K for the nut N to work in
when impelled by the screw M. The packing disc H, Fig. 10, has two
lugs L against which the nut N is pressed during its movement, and by
the mutual position of the guide K and the lugs L, Fig. 11, the packing
disc H is turned round; thereby the incline lugs J on the packing disc
and the cylinder cover ride on one another, and as the cylinder cover
is stationary the packing disc must be pressed further or harder against
the side of the piston. The regulating screw M works in a bearing on
the cylinder.
In the position here shown the steam presses against the upper part
of the piston and moves it round to the steam inlet, so that the steam
now begins to act on the opposite side of the piston while the spent
steam goes off through the exhaust port.
The steam and exhaust ports are so arranged that there can be no
compression of the steam. In this arrangement it is all the same which
way the engine works, and for reversing a simple appliance in the form
of a steam slide answers the purpose.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Gustav Schrebler in the Great Seal Patent Office on
the 7th August 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GUSTAV
SCHREBLER, of Guben, in the Kingdom of Prussia, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Ninth day of February, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Gustav Schrebler, Her special
licence that I, the said Gustav Schrebler, my executors, administrators, and
assigns, or such others as I, the said Gustav Schrebler, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
yend, within the United Kingdom of Great Britain and Ireland, the

page_text: Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN THE CONSTRUCTION OF PISTONS FOR ROTARY ENGINES AND PUMPS, AND IN
PARTS CONNECTED THEREWITH," upon the condition (amongst others) that I,
the said Gustav Schrebler, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Gustav Schrebler, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the accompanying
Drawings, and to the letters of reference marked thereon, that is to
say:
The accompanying Sheet of Drawings illustrates this Invention as
applied to a rotary engine.
Figure 1 is a section through the cylinder with its piston and guide
cylinder.
Figure 2, end view of the guide cylinder which is fixed on the
shaft.
Figure 3 is a section through the guide cylinder.
Figure 4, section through the piston with its packing.
Figure 5, longitudinal section through the piston.
Figure 6 is an end view of the inner side of the cylinder cover.
Figure 7, side view of the cover.
Figure 8, section through same with the packing disc.
Figure 9, side view of the latter; Figure 10, end view of same.
And Figure 11, cylinder cover and packing disc in position, one over
the other.
A is the bed plate; B, the steam cylinder; O, guide cylinder for the
piston; D, shaft; E, piston; F, piston packing; G, cylinder cover;
H, packing disc; J, incline lugs on the cylinder cover and packing disc;
K, guide for the regulating nut in the cylinder cover; L, guide for

page_text: the nut in the packing disc; M, screw for setting up the packing disc;
N, nut for same; O; steam and exhaust pipes; and P, steam space in
the cylinder.
The steam enters through one of the pipes O into the steam space P,
and presses on the piston E with its sliding packings F, which move in
the guide. cylinder C. This latter, which is keyed on the shaft D, is
eccentrical to the cylinder A, so that a steam space P is formed. The
shaft D is so far below the centre of the steam cylinder that a tight
joint is constantly formed at the inner bottom of the cylinder. As the
guide cylinder C with the shaft D must be below the centre of the
cylinder A, it is necessary for the rotation of the piston that it should
be somewhat smaller in diameter than the cylinder A; but in order
that the piston may fit steam tight in all positions it is fitted with
movable packings F, which by spiral springs are kept steam tight
against the inside of the cylinder (Figures 1, 4, and 5); as the piston
fits in the guide cylinder O the latter, as well as the shaft D, are caused
to move with it.
To counteract the wear and tear on the sides of the piston I apply
between it and the cylinder cover the following contrivance, which
admits of setting up even while the engine is at work, see Figures 6
to 11. On each cylinder cover there are four equidistant incline lugs J,
which correspond with similar lugs on packing disc H (Figure 8), which
fits the cylinder exactly; these lugs rest against one another. On the
inner side of each cylinder cover there is a guide K for the nut N to
work in when impelled by the screw M. The packing disc H, Figure 10,
has two lugs L, against which the nut N is pressed during its move-
ment; and by the mutual position of the guide K and the lugs L,
Figure 11, the packing disc H is turned round, thereby the incline
lugs J on the packing disc and the cylinder cover ride on one another,
and as the cylinder cover is stationary the packing disc must be pressed
further or harder against the side of the piston, thus making up
for the wear. The regulating screw M works in a bearing on the
cylinder.
In the position here shown the steam presses against the upper part
of the piston and moves it round to the steam inlet o, so that the steam
now begins to act on the opposite side of the piston, while the spent
steam in P goes off through the other or exhaust port O.

page_text: The steam and exhaust ports are so arranged that there can be no
compression of the steam. In this arrangement it is all the same which
way the engine works, and for reversing a simple appliance in the form
of a steam slide answers the purpose.
· Engines fitted as above described take the place of the usual steam
engines, and have among many other advantages especially the one of a
less consumption of steam, as they use at most one-third of that of the
usual steam engines. The size of boiler and the amount of fuel used
are reduced in the same proportion, and less feed water is required.
The wear and tear is also small. By connecting the shaft D with a
crank or by driving it from another motor it is made suitable for or
rendered into a suction and pressure pump or fire engine.
And having thus fully described the nature of this Invention, and
the mode of carrying out and applying it practically, I declare that I
claim, substantially as set forth and as applied to rotary engines and
pumps,
Firstly. The construction of piston.
Secondly. The construction of cover.
Thirdly. The combination of piston and cover.
In witness whereof, I, the said Gustav Schrebler, have hereunto set 2
my hand and seal, this Second day of August, in the year of our
Lord One thousand eight hundred and seventy-five.
GUSTAV SCHREBLER. (L.S.)