Improvements in Rotary Fluid Pressure Engines.
Year: 1894

page_text: .
Date of Application, 17th Apr., 1894
Complete Specification Left 14th Jan 1895-Accepted. 23rd Feb.. 1895
Improvements in Rotary Fluid Pressure Engines.
I, FRANCIS ERNEST BLACKMORE of 55 Queens Road, Reading, in the County
of Berks, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to certain improvements in rotary fluid pressure engines;
and it consists of a hollow cylinder having a solid cover at one end and a removeable
cover at the other end. On the periphery of the cylinder is a rectangular aperture
forming the inlet or suction, and diametrically opposite is a similar aperture forming
the outlet or delivery.
A mandrel or cylindrical prism is provided which exactly fits the cylinder in
length and diameter, and at one end is extended into a driving shaft which passes
out of the said cylinder through a packing gland in the centre of the solid cover.
Across the face opposite the driving shaft, a deep, wide channel or rectangular
groove is cut equally on each side of and at a right angle to the axis of the
cylindrical prism. Sliding in this channel or groove is a rectangular plunger or
piston which also has a rectangular groove or channel in it at a right angle to the
groove in the cylindrical prism.
Screwed into the removeable cover, and projecting inside the hollow cylinder, and
parallel with its axis, is a pin. The said pin is set out of the centre line of the
cylinder, the amount of its excentricity determining the amount of throw given to
the plunger or piston. The position of the aforesaid pin is in an axial plane at a
right angle to an axial plane which cuts the centres of the inlet and outlet.
square sliding block is bored to fit and turn on the aforesaid pin, the said sliding
block sliding in the groove of the piston or plunger.
A
The mandrel or cylindrical prism revolves in the hollow cylinder and carries
around the plunger or piston, but the said plunger or piston being restrained by the
pin, slides from one end of the groove in the cylindrical prism to the other, and is
at the end of its stroke when the groove in the cylindrical prism is in line with the
said pin and at a right angle with the inlet and outlet.
The rectangular aperture, towards which the end of the channel in the cylindrical
prism nearest the pin is approaching, will be the inlet and the other aperture the
outlet. On revolving the cylindrical prism in the opposite direction the former
inlet becomes the outlet, and the former outlet becomes the inlet. Thus it will be
seen that this apparatus will revolve and work equally well in either direction
without the alteration or adjustment of the mechanism.
I wish it to be understood that the construction of the apparatus above
described may be somewhat modified without departing from the nature of my
invention.
Dated this 16th day of April 1894.

page_text: Improvements in Rotary Fluid Pressure Engines.
I, FRANCIS ERNEST BLACKMORE of 55 Queens Road, Reading, in the County
of Berks, Engineer 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 has for its object to provide a strong, simple and effective rotary
pressure engine which can be used in the capacity of a rotary pump, or with a
slight modification, as a motor, or as a water or other liquid meter.
I will describe the invention with reference to the accompanying drawing.
Fig. 1 represents an end elevation with the loose cover
Fig. 2. a side sectional elevation and
Fig. 3 a sectional plan.
removed
a, b, c, d and e are diagrams showing the movement of the parts during a half
revolution. A is a hollow cylinder having a solid cover B and a removable
cover C.
On the periphery of the said cylinder and diametrically opposite to each other.
are two apertures D and E, one forming the inlet or suction and the other the
outlet or delivery.
A mandrel or cylindrical prism F is provided which exactly fits the cylinder A
in length and diameter, and at one end is extended into the driving shaft G which
passes out of the said cylinder A through the packing gland H in the centre of the
solid cover B. Across the face opposite the driving shaft G, the deep wide channel
or rectangular groove I is cut equally on each side of and at a right angle to the axis
of the cylindrical prism F. Sliding in the said channel or groove is the rectangular
plunger or piston J which also has a rectangular groove or channel K in it at a
right angle to the groove I in the cylindrical prism.
Screwed into the removable cover C and projecting inside the cylinder A and
parallel with its axis is the stationary pin L. This said pin is set out of the centre
or axis of the cylinder A, the amount of its excentricity determining the stroke or
amount of throw given to the plunger or piston J. The position of the aforesaid
pin L is in an axial plane at a right angle to an axial plane which cuts the centres
of the inlet and outlet.
A sliding block M is bored to fit and turn on the aforesaid pin L, the said sliding
block sliding in the groove K of the piston or plunger J.
The action of the apparatus is as follows.
The mandrel or cylindrical prism F revolves in the cylinder A, and carries
around the plunger or piston J, but the said plunger or piston being restrained by the
pin L, slides from one end of the groove I to the other end, and is at the end of
its stroke when the centre line of the said groove I cuts the centre of the said
pin L, and is at a right angle with the inlet and outlet.
The aperture on the periphery of the cylinder A, towards which the end of the
channel in the cylindrical prism F nearest the pin L is approaching will be the
inlet and the other aperture the outlet. On revolving the cylindrical prism F in
the opposite direction, the former inlet becomes the outlet, and the former outlet
becomes the inlet. Thus it will be seen that this apparatus will revolve and work
equally well in either direction without the alteration or adjustment of the
mechanism.
I will now describe the apparatus as used for pumping purposes.
Referring to the diagrams a, b, c, d, e the arrow X shows the direction of
revolution. Diagram a shows the plunger at the beginning of its stroke. When
the plunger J has arrived at the position shown in b, the inlet E and outlet D will

page_text: be in communication with the said plunger. As the cylindrical prism continues to
revolve, the said plunger slides away from the inlet or suction E, through which,
the material to be pumped euters, and slides towards the outlet or delivery D,
through which the said material is discharged. Diagram shows the pump at half
stroke. At the position shown in d the plunger J is nearing the end of its stroke,
and the inlet E and outlet D are rapidly being covered by the cylindrical prism F.
In diagram e the plunger has arrived at the end of its stroke and is in the same
position as shown at a, when the action already described is repeated.
On revolving the cylindrical prism F in the opposite direction as indicated by the
arrow Y, the position of the inlet and outlet is reversed, D becoming the inlet and
E the outlet.
When the invention is to be used for the purpose of measuring water or other
liquids, or as a motor, I couple together two of the above described apparatuses so
that the driving shaft G is common to both, and in such a manner that the
channel I and piston J of one is at a right angle to that of the other. When
one piston is on the dead centre as shown in diagram a the other piston will be at
half stroke as shown in diagram c, thus producing a continuous revolving motion to
the shaft G. The single apparatus also can be used as a motor if a fly wheel is
fitted to the said shaft G to carry it over the dead centre.
•
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
First. The stationary pin L set away from the centre of the cylinder A as and
for the purposes herein before described.
Second. The combination of the channelled cylindrical prism F and the plunger
or piston with the stationary pin Las and for the purposes herein before
described.
Third. Coupling together two of the apparatuses illustrated in Figs. 1, 2 and 3
as and for the purposes hereinbefore described.
Fourth. The arrangement and combination of parts constituting the apparatus
substantially as and for the purposes hereinbefore described and as illustrated in
the accompanying drawings.
Dated this 12th day of January 1895.