IMPROVEMENTS IN CENTRIFUGAL
Year: 1881

page_text: LETTERS PATENT to Alfred Fryer, of Wilmslow, in the County of Chester,
Engineer, and James Bingham Alliott, of Nottingham, in the County of
Nottingham, Engineer, for an Invention of "IMPROVEMENTS IN CENTRIFUGAL
PROVISIONAL SPECIFICATION left by the said Alfred Fryer and James
Bingham Alliott at the Office of the Commissioners of Patents on the 15th
November 1881.
"
ALFRED FRYER, of Wilmslow, in the County of Chester, Engineer, and JAMES
BINGHAM ALLIOTT, of Nottingham, in the County of Nottingham, Engineer.
IMPROVEMENTS IN CENTRIFUGAL DRYING MACHINES AND IN METHODS OF
DRIVING THE SAME."
Our Invention has reference to improvements in or pertaining to centrifugal
drying machines, and is applicable, inter alia, to centrifugal machines of the well
known Weinrich construction, as also to machines of the kind described in the
Specification of a former Patent granted to one of us, the said Alfred Fryer, dated
15 December 1879, No. 5129. .
According to our Invention we provide the machine with an engine carried, in
the case of a Weinrich machine, on its foundation plate, or, in the case of a Fryer's
machine made in accordance with the above named Patent, by its outer casing.
The cylinder and the guides of the engine are arranged by preference under or
partly under the " bottom of the machine. The engine is provided with a crank
shaft carrying a fixed driving pulley supported in suitable bearings carried by the
foundation plate or the outer casing of the inachine. The driving pulley, like the
other parts of the engine, is placed partly below the "bottom" of the machine.
There is another pulley (of smaller diameter) on the shaft that carries or supports
the cage or revolving cylinder of the machine; these two pullies we connect by a
belt or strap, and between them we interpose an intermediate or "idle" pulley.
By this arrangement, whilst the intermediate pulley serves to keep the driving and
driven pullies properly apart, the belt or strap tends to draw them towards one
another, and the belt or strap and intermediate pulley both serve to communicate
motion from the driving pulley to the driven one, while the use of the intermediate
pulley relieves the bearings both of the machine and of the engine from the side
strain which would otherwise be caused by the pull of the belt..
In some cases the intermediate pulley may be dispensed with.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alfred Fryer and James Bingham Alliott in the Great Seal
Patent Office on the 13th May 1882.
ALFRED FRYER, of Wilmslow, in the County of Chester, Engineer, and JAMES
BINGHAM ALLIOTT, of Nottingham, in the County of Nottingham, Engineer.
IMPROVEMENTS IN CENTRIFUGAL DRYING MACHINES AND IN METHODS OF
DRIVING THE SAME."
"
Our Invention has reference to improvements in or pertaining to centrifugal
drying machines, and is applicable, inter alia, to centrifugal machines of the well
known Weinrich construction, as also to machines of the kind described in the
Specification of a former Patent granted to one of us, the said Alfred Fryer, dated
15 December 1879, No. 5129.
According to our Invention we provide the machine with an engine carried, in
the case of a Weinrich machine, on its foundation plate, or, in the case of a Fryer's
machine made in accordance with the above named Patent, by its outer casing.
The cylinder and the guides of the engine are arranged by preference under or
partly under the "bottom" of the machine. The engine is provided with a crank
shaft carrying a fixed driving pulley supported in suitable bearings carried by the
foundation plate or the outer casing of the machine. The driving pulley, like the
other parts of the engine, is placed partly-below-the-"-bottom" of the machine.
There is another pulley (of smaller diameter) on the shaft that carries or supports
the cage or revolving cylinder of the machine; these two pullies we connect by a
belt or strap, and between them we interpose an intermediate or "idle" pulley.
By this arrangement, whilst the intermediate pulley serves to keep the driving and
driven pullies properly apart, the belt or strap tends to draw them towards one
another, and the belt or strap and intermediate pulley both serve to communicate
motion from the driving pulley to the driven one, while the use of the intermediate
pulley relieves the bearings both of the machine and of the engine from the side
strain which would otherwise be caused by the pull of the belt.
In some cases the intermediate pulley may be dispensed with.
Referring to the accompanying two Sheets of Drawings, in which the same letters
of reference designate the same or similar parts wherever they occur, Fig. 1
(Sheet 1) is a plan, and Fig 2 is an elevation of a Weinrich centrifugal machine
with our Invention applied thereto. The cylinder A of the motive power engine is
arranged horizontally upon the bed plate of the machine. Its piston actuates a
vertical crank shaft B rotating in bearings on the foundation plate and on the
outer casing of the machine respectively. Upon the crank shaft is a driving
pulley C, situated partly under the "bottom" of the machine, and coupled or
connected by a strap to a smaller driven pulley D on the shaft E that carries
or supports the cage or revolving cylinder F. Between the two pullies C and D
there is interposed an intermediate or idle pulley G, which runs in frictional
contact with both the driving and driven pullies, and serves both to communicate
motion from the former to the latter, and to relieve the bearings of the machine
and the engine from the strain of the belt. In a Weinrich centrifugal machine the
vertical spindle or shaft carrying the cage or revolving cylinder is held by
india rubber buffers I, and is therefore free to incline itself slightly from the
vertical position, for which purpose also the said spindle or shaft rests upon (as
illustrated) or is suspended to a kind of ball and socket arrangement K. It is
therefore necessary to shape the rim of the pulley D upon the spindle or shaft E in
such wise that the length of the belt working upon this and the driving pulley C
shall not be altered by the inclination of the spindle E. The idle or intermediate

page_text: pulley G is shewn in the Drawing with a convex rim, but it is evident that it
might have a flat rim or a concave rim shaped to fit the rim of the driven pulley.
Fig. 3 is a plan, and Fig. 4 an elevation of a Fryer's centrifugal machine of the
kind described in the Specification No. 5129, A.D. 1879, with our present
Invention applied thereto.
In this case the engine is attached to the outer casing of the machine and not to
the foundation, as in the Weinrich machine. In the Fryer machine, as shewn, the
outer casing is supported upon spherical balls interposed between concave surfaces,
or upon oblate spheroidal balls placed between plane surfaces, upon the casing and
upon its foundation or base respectively, so that the said balls are capable of slight
rolling motion for the purpose of permitting to the machine a restricted movement,
but obviously our Invention is equally applicable in arrangements wherein the
outer casing is fixed. The intermediate or idle pulley G is shewn with a flat rim.
Having described the nature of our said Invention, and in what manner it is to
be carried in practical effect, what we claim is,—
1. In a centrifugal drying machine wherein the cage or revolving cylinder is
attached to a spindle or shaft that rests upon at one end or is suspended from a
kind of ball and socket or equivalent arrangement, such as hereinabove explained,
so that though the outer casing be fixed, limited vibration is permitted to the cage
or revolving cylinder; the use in combination of a pulley attached to the said
spindle or shaft, a pulley on a crank shaft supported in suitable bearings as
described, and driven by a reciprocating engine, an intermediate pulley, and a belt
or strap, the arrangement and operation being substantially such as hereinabove
described with reference to Figs. 1 and 2, and for the purpose set forth.
2. In a centrifugal drying machine the use in combination of a pulley attached
to the spindle or shaft of the cage or revolving cylinder, a pulley on a crank shaft
driven by a reciprocating engine carried by the outer casing of the machine, an
intermediate pulley and a belt or strap, the arrangement and operation being
substantially such as hereinabove described and for the purpose set forth.
3. A Weinrich's centrifugal drying machine with the driving arrangement
hereinabove described with reference to Figs. 1 and 2, but without the intermediato
pulley G.
4. A Fryer's centrifugal drying machine with the driving arrangement herein-
above described with reference to Figs. 3 and 4, but without the intermediate
pulley G.
In witness whereof, I, the said James Bingham Alliott, have to this Specifi-
cation set my hand and seal, this Twelfth day of May, in the year of our
Lord Oue thousand eight hundred and eighty two.
JAMES BINGHAM ALLIOTT. (L.S.)