Year: 1887

page_text: Date of Application, 21st Apr., 1887
Complete Left, 9th Jan., 1888
Complete Accepted, 10th Feb., 1888
I JOHN BOWNS of 14 Talbot Street, Park, Sheffield in the County of York, fore-
man engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to that class of pumps blowers and motors in which a flat disc
works in a spherical casing between two cones having the same axis and a distance
equal to the thickness of the disc between their apices on which cones, the disc has a
rolling motion. Ordinarily a shaft perpendicular to the disc is passed through the
spherical boss of the disc or a similar shaft is formed on the boss and connected to a
crank on a shaft the axis of which coincides with that of the cones so that when this
shaft rotates, the shaft fitted to the disc has a gyrating motion and describes a cone
having its apex in the centre of the disc. This arrangement has the drawback that
the two shafts are not rigidly connected to one another and each shaft has only one
bearing. The object of my improvements is to obviate this drawback and to make a
steadier machine capable of running at a high speed.
One way of carrying out my improvements consists in placing a shaft conaxially
with the two cones and providing said shaft with bushes or bearings on both sides of
the casing. On the middle of the shaft I form a flat disc or collar of smaller diameter
than the rolling disc or piston and inclined to the axis of the shaft, at the same angle
as that formed by the sides of the cones with their axis, which can be conveniently
done by chucking both ends of the shaft excentrically in a lathe, or I key a disc or
collar of this form upon the shaft. The large disc or piston of the engine working in
the spherical case I form with a boss recessed on one side for the reception of the
collar on the shaft so as to be in the same plane as the disc and on the other side of
the collar I place a washer, and screw or otherwise attach this washer to the disc, so
that the collar on the shaft can rotate within the boss of the disc and the washer.
The boss and washer are turned spherically outside or on part of their outsides. When
the shaft is rotated by power and the disc held as usual by a partition in the casing,
the inclined position of the collar causes the disc to roll on the two cones in the same
manner as with the arrangements hitherto employed.
When the engine is to be used as a motor, with this arrangement, balls may be
inserted between the sides of the disc forged on the shaft and the piston disc so as to
form ball bearings for the purpose of reducing the friction.

page_text: In some cases I pass a shaft through the boss of the disc perpendicularly to the
latter and form or fix on the ends of the shaft excentrics inclined to the shaft in
opposite directions and turned so that their axes coincide with the axis of the conical
ends of the casing, and arrange bearings for these excentrics or for shafts formed
conaxially with them to run in. The rotation of these excentrics causes the disc to
roll on the cones and vice versa the rolling of the disc under steam or other fluid
pressure causes the excentrics or conaxial shafts formed or connected to them to
rotate.
Instead of the arrangement herein last described, in some cases 1 make the shaft
passing through the piston disc perpendicularly to the latter of sufficiently large
diameter to allow excentric pins inclined to the shaft and conaxial with the cones and
cach other to be turned on it and support these pins in bearings. The effect of this
arrangement is the same as that of the other arrangements herein before described.
The ports or valves and other parts of the engines, blowers or pumps may be
arranged in any ordinary or known suitable manner.
By the arrangements herein before described the disc is supported by the shaft
passing through it and the spherical boss relieved from pressure and wear on the
casing and the shaft itself supported at both ends.
Dated this 10th ..
A 1007
EMMOTT & Co.,
Agents for the Applicant.

page_text: I JOHN BOWNS of 14 Talbot Street, Park, Sheffield in the County of York,
foreman 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:-
My invention relates to that class of pumps blowers and motors in which a flat disc
works in a spherical casing between two cones having the same axis and a distanco
equal to the thickness of the disc between their apices, on which cones the disc has a
rolling motion. Ordinarily a shaft perpendicular to the disc is passed through the
spherical boss of the disc or a similar shaft is formed on the said boss and connected
to a crank on a shaft the axis of which coincides with that of the cones, so that when
this shaft rotates, the shaft fitted to or formed on the disc has a gyrating motion and
describes a cone having its apex in the centre of the disc. This arrangement has the
drawback that the two shafts are not rigidly connected to one another and each shaft
has only one bearing. In some cases the two shafts with the crank connecting them
have been formed in one piece, and the shaft perpendicular to the disc has also been
prolonged on the opposite side and formed with a second crank and shaft end conaxial
with the two cones, the two cranks being opposite to one another. These arrange-
ments have the disadvantage that the bearings of the conaxial shaft ends are at a great
distance from the centre of the disc and that the shaft between the two cranks which
carries the disc is liable to be bent and subject to vibration, causing a noisy and
irregular working of the machine. The object of my improvements is to obviate
these drawbacks and to make a steadier machine capable of running at a high speed
without vibration.
On the sheet of drawings appended hereunto-
Fig. 1 shows a vertical cross section through my improved machine.
Fig. 2 a vertical longitudinal section.
Fig. a horizontal section through the casing with the disc and conical cover in
outside view.
Figs. 4, 5 and 6 show details on an enlarged scale.
The machine consists similarly to those herein before referred to of a spherical
casing or cylinder a provided with suitable feet b b for fixing it to a foundation and
having conical ends c and d. The cylinder a is shown made in two parts divided
vertically and bolted together through the flanges e f, and the cone c cast in one piece
with one half of the cylinder, while the other cone d is separate and bolted to the
cylinder a by means of the flange g. Both cones however may he cast solid each
with one half of the cylinder or both cones may be separate and bolted to the
cylinder a. The latter may be made in two parts divided horizontally and bolted
together instead as shewn, both cones being made separate in this case. My improve-
ments consist in placing a straight shaft h, shewn on an enlarged scale by fig. 6,
conaxially with the two cones, which shaft is supported in bushes or bearings formed
on or attached to the conical ends of the cylinder and has formed on or fixed upon it
a flat disc or collar i inclined to the axis of the shaft h at the same angle as that
formed by the sides of the cones with their axis. By preference I forge the disc i
solid with the shaft, as shewn on the drawings and turn it with the requisite inclina-
tion to the shaft by chucking the latter excentrically in a lathe, the bosses k at the
sides of the disc being turned at the same setting. On the disc i and bosses k l I

page_text: place two hemispherical bosses m and n shown on an enlarged scale by fig. 4 in
section and fig. 5 in a view of the joint. These bosses are recessed so as to enclose
and fit the disc i when bolted together by the bolts oo and bored to fit the bosses kl
with the ends of the hole bored conically to clear the shaft h. On the edges of the
two hemispheres a groove is turned in which the large disc or piston p of the machine
is clipped and secured by the bolts o o. In some cases I form the piston p solid
with one of the hemispherical bosses instead as described. The central parts of the
conical ends or bushes inserted into them are turned spherically on the inside to fit
the bosses m n.
The piston p is slotted as usual along one radius from the spherical
boss to the circumference and a partition plate q inserted into the slot, which divides the
inlet and outlet ports and s from one another and can conveniently be secured in its place
by being fitted into recesses of the conical cylinder ends. This partition plato g holds
the disc and prevents it from rotating, and when the shaft his rotated by the pulley t,
the piston p rolls on the cones and draws the air or liquid in on one side of the
partition plate 7 and expels it on the other side in the usual manner. The machine
may also be used as a motor; the fluid under pressure being admitted through the
port at one side of the partition plate and exhausted through the port on the other side
will cause the piston to roll on the cones and drive the shaft, the disc or collar i being
in that case made larger in proportion to the piston p than shewn on the drawings.
The bearings or bushes for the shaft may both be cast solid with the cylinder ends as
shewn on the left hand side of figure 1 or they may be separate and attached by bolts
as shewn on the right hand side. An adjustable cylindrical bush n turned spherically
at the end to fit the boss of the piston is by preference inserted into one cylinder end
as shewn and pressed by springs against the spherical boss to take up the wear and
prevent shaking. Balls may be inserted between the disc i and the bosses m and n
so as to form ball bearings for the purpose of reducing the friction. This arrange-
ment is shewn on the drawing. Hard metal rings w and are inserted into grooves
turned in the bosses m and n and have grooves turned into them, the disc i having
corresponding grooves turned into it so that the balls are half way or nearly so in
each of them. In some cases I place balls in grooves turned on the outer circum-
ference of the disc half way into the disc i and half way into the bosses m and n at
their joint.
The cylinder and piston may be made of cast iron, gun metal, vulcanite or other
material suitable for the purpose for which the machine is intended. In some cases I
cover the piston or disc p with leather, india-rubber or other elastic material not
injured by the fluid in the machine for the purpose of insuring a perfect fit of the
piston p against the conical cylinder ends and prevent leakages and vibrations. Elastic
packings may be arranged on the circumference of the disc or piston p and on the
edges of the slot bearing upon the partition plate q.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, I declare that what Iclaim is
Firstly, the general arrangement of disc blowers, pumps and motors substantially
as described and illustrated by the drawings.
Secondly, in disc blowers pumps and motors the arrangement of a straight shaft h
with an inclined disc or collar i working in recesses of hemispherical bosses m and n,
substantially as herein before described.
Thirdly, the arrangement of ball bearings for reducing the friction between the dise
or collar and the heinispherical bosses m and n.
Dated the 6th day of January 1888.
EMMOTT & Co.,
Agents for the Applicant.