Year: 1886

page_text: Date of Application, 21st May, 1886
Complete Left, 25th Jan., 1887.
Complete Accepted, 25th Feb., 1887
I, JOHN FREDERICK AUGUSTUS PFLAUM gentleman of Ashlan House Potternewton
near Leeds, in the county of York do hereby declare the nature of this invention to
be as follows:-
The Blowing Engine consists of iwo equal cylinders placed horizonially side by
side so as to have the same centre line.
The driving shaft is placed in the centre line of the cylinders, the driving pulley
being between the two cylinders, the shaft is fitted with plumber blocks bolted to
flanges cast to the inside of the cylinder ends. To each end of the shaft is fitted an
over-end crank, the crank-pins being diametrically opposite to each other. On each
crank pin is fitted a piston consisting of a rim, arms and centre boss like an ordinary
driving pulley. The edges of the rim fit freely between the ends of the cylinders and
when the shaft revolves one part of the periphery of the piston is always in contact
with the inside of the cylinder, and the piston is large enough, that the inside of
the rim clears the plumber blocks and brackets supporting the driving shaft. At one
place in the rim there is a slot right across it and on each side of this slot are bolted
brass angle pieces to the outside of the rim and between the angle pieces works freely
a guide plate, which will be referred to hereafter.
To the upper part of the cylinders are cast cylindrical valve boxes each communi-
cating with the cylinders by openings which are of the same length as the cylinders.
Each valve box has on one side an inlet and on the other side an outlet opening.
The outlet openings are joined by a delivery pipe. Each valve box is fitted with a
hollow cylindrical valve, open on the side towards the main cylinder. In each
valve there are 2 slotholes corresponding with the inlet and outlet openings in the
valve box.
To the inside of the valve between the two slotholes is secured the guide plate
referred to above. The guide plate fits laterally between the ends of the valve box
and cylinder and in the other direction between the angle pieces on the piston as
mentioned above.

page_text: The guideplate is so long that as the piston revolves and the guide or angle-pieces
slide up and down the guideplate, they always keep sufficient hold of the same.
When the engine is set in motion the piston will revolve on the crankpin round the
centre of the driving shaft and at the same time the piston and valve will make
an oscillating movement round their respective centres owing to the connecting
guideplate.
When the piston passes the opening from the cylinder into the valve box, the outer
edges of the anglepieces will fit in the opening in the valve and for the moment the
communication between the inlet and outlet with the cylinder will be stopped.
It will be understood that the piston in revolving will draw air through one opening
in the valve box and discharge it through the other and that one piston will discharge
the largest volume when the other discharges the least, thus causing a practically even
flow through the discharge pipe.
Instead of the driving pulley the Blowing engine may be fitted with a crank
connecting rod and steam cylinder between the two Blowing Cylinders for driving
the same.

page_text: Improvements in Blowing Engines.
1, JOHN FREDERICK AUGUSTUS PFLAUM, gentleman, of Ashlar House, Potternewton
near Leeds, 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:
The Blowing Engine consists of two equal cylinders (A A) placed horizontally side
by side so as to have the same centre line. The driving shaft is placed in the centre
line of the cylinders at B, the driving pulley (C) being between the two cylinders;
the shaft is fitted with plumber blocks (D) bolted to flanges cast to the inside of the
cylinder ends. To each end of the shaft is fitted an over end crank, the crank pins
being diametrically opposite to each other. On each crank pin is fitted a piston (E,E)
consisting of rim arms and centre boss, like an ordinary driving pulley. The edges
of the rim fit freely between the ends of the cylinders and when the shaft revolves one
part of the periphery of the piston is always in contact with the inside of the cylinder
and the piston is large enough that the inside of the rim clears the plumber blocks
and brackets supporting the driving shaft. At one place in the rim (F) there is a
slot right across it and on each side of this slot are bolted brass angle pieces (G, G)
to the outside of the rim and between the angle pieces works freely a guide plate (H,H)
which will be referred to hereafter.
To the upper part of the cylinders are cast cylindrical valve Boxes (I, 1) each
communicating with the cylinders by openings which are of the same length as the
cylinders. Each valve box has on one side an inlet and on the other side an outlet
opening the outlet openings (K, K) are joined by a delivery pipe. Each valve box
is fitted with a hollow cylindrical valve (L, 1) open on the side towards the main
cylinder. In each valve there are 2 slotholes corresponding with the inlet and outlet
openings in the valve box. To the inside of the valve between the two slotholes is
secured the guide plate (H. H) referred to above. This guide plate fits laterally
between the ends of the valve box and cylinder and in the other direction between the
anglepieces (G, G) on the piston as mentioned above. The guide plate is so long that
as the piston (E, E) revolves and the guide or anglepieces (G, G) slide up and down
the guide plate, they always keep sufficient hold of the same and the guideplate fits
also in the brass slide (M; M) forming part of the boss of the piston. When the
engine is set in motion the piston (E,E) will revolve on the crank-pin round the
centre of the driving shaft and at the same time the piston and valve will make an
oscillating movement round their respective centres owing to the connecting guide
plate.
When the piston passes the opening from the cylinder into the valve box, the outer
edges of the angle pieces (G, G) will fit in the opening in the valve and for the
moment the communication between the cylinder and the outlet will be closed.

page_text: It will be understood that each piston in revolving will draw air through one opening
in the valve box and discharge it through the other and that one piston will discharge
the largest volume when the other discharges the least, thus causing a practically even
flow through the discharge pipe connecting the two cylinders.
Instead of the driving pulley, the Blowing Engine may be fitted with a crank,
connecting rod and steam cylinder between the two Blowing Cylinders, for driving
the same.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed, I declare that what I claim is
1.) The working of a rotary piston in connection with a circular valve so as to give
an oscillating motion to both and
2.) The arrangement for shutting the outlet during part of each revolution as
described above.