improvements in Rotary Engines and Pumps.
Year: 1885

page_text: improvements in Rotary Engines and Pumps.
We JOHN PATERSON of number twenty two South Back of Canongate
Edinburgh Engineer and DANIEL PATERSON of number twenty Gilmore Street
Edinburgh Engineer,do hereby declare the nature of our invention for "IMPROVE-
MENTS IN ROTARY ENGINES AND PUMPS" to be as follows
-
}
Whereas we have already lodged a Provisional Specification for "Improvements
in Rotary Engines" the application for the Patent of which is numbered 4409 and
18 dated ninth April Eighteen hundred and eighty five, we do hereby desire to
make known further modifications of the same Patent but which are in no way
intended to encroach upon any part of the invention described in our foresaid
Provisional Specification
In the course of our experiments in reference to the foresaid invention we have
discovered that similar results can be obtained by other modifications or combina-
tions of the same or similar parts of the apparatus described in our former
specification, without the necessity of having the cylinder made elliptical in form,
although, we believe that the best results can be obtained when the cylinder 18
made elliptical in form as therein described
We find that instead of making the slide to work inside of the barrel as
described in our foresaid specification it can be divided into two pieces or slides
each working from opposite sides, and outside of the cylinder, the slots being made
in the cylinder to admit of each of these slides projecting inwards and pressing
against the barrel
These slides are kept in their position by a spiral spring at the
outer ends of each, so that as the barrel revolves it is in constant contact with the
inner ends of the two slides but the barrel being eccentric to, that is, having a
different centre from that of, the cylinder, as it revolves presses out the one slide
while the other slide following the receding of the barrel is pressed in and along
with the periphery of the barrel forms a surface upon which the steam when let
into the cylinder acts in the same way as upon a piston. Each slide is provided
with both an inlet and an outlet for the steam, so arranged as to work alternately
with the other slide, that is when the one slide forms an inlet on its one side
there is formed an outlet on the same side of the other slide and vice versa
Another modification is as follows -The slide can also be arranged to work
Inside of the barrel by being made in two pieces having between them an
arrangement of springs by which each portion of the slide is pressed out as as to
be in constant contact with the inner periphery of the cylinder In this arrange-
ment the barrel is made eccentric to the cylinder and as it revolves the one portion
of the slide 18 by its contact with the inner periphery of the cylinder pressed
nwards while the springs internally press out the other end of the slide so as to̟

page_text: keep it in contact with the opposite portion of the inner periphery of the cylinder
and thus to form in connection with the outer periphery of the barrel what is
equivalent to the piston of a steam engine Outlet and inlet ports are provided
here for the steam in the ordinary way
The
Another modification is that both the cylinder and the barrel are concentric but
upon one side of the internal periphery of the cylinder there is placed a projection
against which the periphery of the barrel constantly revolves The slide in this
case is made in one piece and unfixed so as to move readily through the slot
length of the slide is the same as the diameter of the inner periphery of the
cylinder, and when it comes to the projection before mentioned it is by that
pressed inwards so as to pass over the projection and after it has passed over it, it
receives the steam and thus forms the piston Immediately opposite the projection
before referred to there is placed in the inner periphery of the cylinder a similarly
formed depression as as to allow of the other end of the slide receding to enable it
to pass over the foresaid projection and to return when past the projection This
projection may either be fixed on the inner periphery of the cylinder or may be
made to work through the cylinder by means of a spring in which case the core-
sponding depression is not required, the projection being pressed outwards by the
end of the slide, and when the slide passes it, it is pressed within the cylinder by
means of the spring
We have provided here for a slide or slides with only two projecting ends but if
wished a larger number of projecting ends can be arranged for although we do not
consider this would be so satisfactory as only the two ends
We have also discovered that our invention is applicable as pumps and turbines
the only difference being that for this use our invention is driven by an outward
or external power and forms in itself the mechanism by which the water is drawn
in and forced out. In this case the portholes are made correspondingly larger to
enable the larger body of water easily to enter and leave
100K

page_text: case is made in one piece and not fixed to the barrel so as to move readily through
the slot from side to side for the purpose of passing the projection The length of
the slide 18 the same as the diameter of the inner periphery of the cylinder and
when it comes to the projection before mentioned it is by that pressed inwards so
as to pass over the projection and after it has passed over it, it receives the steam
and thus forms the piston Immediately opposite the projection before referred
to, there is placed in the inner periphery of the cylinder a similarly formed
depression N so as to allow of the one end of the slide to recede to enable its other
end to pass over the aforesaid projection This projection may either be fixed on
the inner periphery of the cylinder or may be made to work through the cylinder
by means of a spring, in which case the corresponding depression is not required,
the projection being pressed outwards by the end of the slide, and when the slide
passes it, it is pressed forward into or within the cylinder by means of the spring
We have provided here for a slide or slides with only two projecting ends, but if
wished a larger number of projecting ends can be arranged for, although we do not
consider this would be so satisfactory as one with only the two ends.
Our invention 18 also applicable as a pump, the only difference being that for
this use our invention is driven by an outward or external power and forms in
itself the mechanism by which the water is drawn in and forced out. In this case
the portholes are made correspondingly larger to enable the larger body of water
easily to enter and leave
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we hereby declare that
we do not claim as novel any of the individual parts before specified but that what
we claim 18 -
1 A Rotary Steam Engine made substantially in the manner herein before
described or any mere modification thereof
2 The combination of parts forming our improved engine acting substantially as
hereinbefore described or any mere modification thereof
3 The combination of parts forming our invention substantially as described
herein or in the specification lodged in our former application for a patent Number
4409 dated 9th April 1885 for the purpose of a pump or any mere modification
thereof