Improvements in Pumps and Blowers.
Year: 1892

page_text: Date of Application, 30th May, 1892
Complete Specification Left, 24th Feb., 1893-Accepted, 27th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Pumps and Blowers.
1, HENRY SKINNER, of 43 Singlewell Road, Gravesend, in the County of Kent,
Engineer, do hereby declare the nature of this invention to be as follows:-
The pump is formed of a cylindrical casing closed at its ends. Within and at
one end of the casing is a circular plate carried by a shaft which passes out through
At three equi-
the centre of that end and can be driven in any suitable manner.
distant points around the circumference of the circular plate the plate has three
cylindrical projections standing out from it parallel with the shaft these extend
and fit up to the opposite end of the casing. Along one side of their circumference
the projections also fit to the side of the circular casing and along their opposite
side they fit to the side of a fixed curved block which is concentric with the casing.
The projections therefore serve as pistons travelling along an annular space
between the fixed block and the cylinder. This fixed block is secured to the
cylinder cover. The annular space so formed extends around about one third
or more of the cylindrical casing. The extent of the annular space is governed
by the number of pistons. At one end of the annular groove an inlet port is
formed through the side of the casing and at the other end an outlet port.
All fluid entering by the inlet port has to pass along the annular channel
before it can pass off by the outlet port-the direct passage from the one to
the other being obstructed by a disc one part of the circumference of which
fits to a corresponding hollow in the side of the casing and the opposite part
The disc is free to be
fits to a corresponding hollow in the fixed block.
revolved around a pin carried by the end cover of the casing. In the disc are
two radial slots on opposite sides of the pin on which the disc revolves. When the
circular plate is revolved and the projections which stand out from it are brought
round to the disc they enter one or other of the slots in the disc and cause the disc
to turn and the disc is made of such a size that just as one projection leaves one of
the radial slots another projection enters the other slot and the disc is therefore
kept revolving.
It is not essential that there should be three projections on the circular plate
and two radial slots in the dise as for example there might be five of the projections
which serve as pistons and four slots in the disc. In all cases there would be one
more piston than there are slots in the disc. In some cases in place of the pistons
being each formed of a single cylindrical projection they might be divided across
into two or more parts at right angles to their axes and one part be set slightly in
advance of the other. The disc would then be similarly divided and the slots in
the two or more parts of the disc into which the two parts of the piston are to
enter would be correspondingly set one slightly in advance of the other. The
projections or pistons need not be cylindrical they might be circular or of any
desired form in longitudinal section taken on a line radial to the shaft.
Dated this 30th day of May 1892.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Pumps and Blowers.
I, HENRY SKINNER, of 43 Singlewell Road, Gravesend, in the County. of
Kent, 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 :-.
The engine pump or blower is formed of a cylindrical casing closed at its ends.
Within and at one end of the casing is a circular plate carried by a shaft which
passes out through the centre of that end and can be driven in any suitable manner.
At three equidistant points around the circumference of the circular plate, the
plate has three projections standing out from it parallel with the shaft these
extend and fit up to the opposite end of the casing. Along one side of their
circumference the projections also fit to the side of the circular casing and along
their opposite side they fit to the side of a fixed curved block the outer circum-
ference of which is concentric with the casing. The projections therefore serve
as pistons travelling along the space between the outer circumference of the fixed
block and the cylinder. This fixed block is secured to the cylinder cover.
The
space so formed extends around somewhat more than one half of the cylindrical
casing. At one end of the annular groove an inlet port is formed through the side
of the casing and at the other end an outlet port.
All fluid entering by the inlet port has to pass along the annular channel before
it can pass off by the outlet port-the direct passage from the one to the other
being obstructed by a disc one part of the circumference of which fits to a corre-
sponding hollow in the side of the casing and the opposite part fits to a corresponding
hollow in the fixed block. The disc is free to be revolved around a pin carried by
the end cover of the casing. In the disc are two radial slots on opposite sides of
the pin on which the disc revolves. When the circular plate is revolved and the
projections which stand out from it are brought round to the disc they enter one
or other of the slots in the disc and cause the disc to turn and the disc is made of
such a size that just before one projection leaves one of the radial slots another
projection enters the other slot and the disc is therefore kept revolving.
In the drawings annexed I have shewn various views of an engine pump or
blower constructed as above described.
Figures 1 and 2 are vertical sections shewing the parts in two different positions.
Figure 3 is a vertical section taken at right angles to Figures 1 and 2.
Figure 4 is a face view and Figure 5 a side elevation of the circular plate and
three pistons carried by it.
Figure 6 is a face view and Figure 7 an edge view of the slotted revolving disc.
A, is the outer casing. B a shaft passing through a bearing at the centre of one
end of the casing. C the circular plate carried by the shaft and D D D the three
projections or pistons standing out from the plate. E is the fixed curved block on
the inner face of the opposite end of the casing. F is the slotted disc capable of
being revolved around a pin G which stands out from this same end of the casing.
H, H are two ports opening into the casing, either will serve as an inlet port
whilst the other serves as an outlet port according to the direction in which the
shaft B is driven.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination of a circular casing, a shaft passing through a bearing at the
centre of one end of this casing-a circular plate on the shaft fitting up to this end
of the casing a crescent shaped projection standing out from the opposite end of
the casing, three equidistant pistons or projections standing out from this plate

page_text: parralel with the shaft each of a size to fit between the casing and the exterior of
the crescent, a disc capable of being turned around a pin carried by the end of the
casing which has the crescent projecting from it-such disc fitting to the inner curve
of the crescent and to the side of the casing opposite to it and inlet and outlet ports
to the casing, one on either side of the disc substantially as described.
2. The construction of engines pumps and blowers substantially as herein before
described and illustrated in the drawing annexed.
Dated this 20th day of February 1893.
HENRY SKINNER.