Improvements in Apparatus for Straining or Sifting Finings and other analogous Materials.
Year: 1890

page_text: Date of Application, 25th July, 1690
Complete Specification Left, 27th Apr., 1891-Accepted, 30th May, 1091
Improvements in Apparatus for Straining or Sifting Finings and
other analogous Materials.
We CHARLES OSCAR GRIDLEY, of 4 Bishopsgate Avenue, Camomile Street,
London, E.C., Isinglass Merchant, and ALFRED BISHOP, of 3 Oswald Villas,
Erskine Road, Walthamstow, in the County of Essex, Isinglass Worker, do
hereby declare the nature of our said invention to be as follows:-
The object of our invention is to effect improvements in apparatus for the manu-
facture of fiuings, and for thinning and fining or straining paint, or any other thick
or mucilaginous material, or materials in a dry state.
In carrying out our invention we use an inverted conical sieve; the upper part
forming the base of the cone being fixed to the end of a cylindrical vessel. A
vertical shaft is fitted to the cylinder and sieve. The upper end of the shaft is carried
by a bearing fitted to a cross bar attached to the cylinder or in any other suitable
manner; the shaft passing through the bearing, and being fitted with a handle,
wheel, pulley, or other gear for driving the shaft. The lower end of the shaft is
fitted in a footstep fitted in the apex of the conical vessel or sieve.
The vertical shaft carries a continuous spiral screw consisting of two, three or
more helices, corresponding to the form of the conical sieve.
The bearings are made adjustable, for the purpose of raising or lowering the
screw shaft, and thus bringing the blade of the screw nearer to, or removing it
further from the inner surface of the conical sieve.
In using our invention the materials to be operated upon are placed in the
apparatus. The screw is then driven round, whereby the materials are passed
through the meshes of the sieve, and brought to the requisite degree of fineness.
The size of the meshes in the sieve or screen are suited to the nature of the
materials to be operated upon, and the required degree of fineness to which they
are to be reduced. Screens of various sized meshes are provided, so that the
operation can be varied as desired, by merely removing the screen, and attaching
another to the cylinder. The materials can thus be passed through several times,
and the refuse cleared away from the inside.
We do not confine ourselves to the form of a right cone in constructing the
sieves or screens, as the same may be conoidal, or of any other convenient form
approximating thereto.
Dated 25th day of July 1890.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Straining or Sifting Finings and
other analogous Materials.
We, CHARLES OSCAR GRIDLEY of 4 Bishopsgate Avenue, Camomile Street
London E.C., Isinglass Merchant, and ALFRED BISHOP, of 3 Oswald Villas,
Erskine Road, Walthamstow, Essex, Isinglass Maker do hereby declare the nature
of our said invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :—
The object of our invention is to effect improvements in apparatus for the manu-
facture of finings. Our invention being also applicable to the purposes of thinning,

page_text: fining or straining paint or any other thick or mucilaginous material or materials,
and for similarly treating other materials in a dry state.
And in order that our said invention may be particularly described and ascer-
tained, reference is hereby made to the accompanying drawings, in which similar
letters of reference indicate corresponding parts.
Fig. 1 is an elevation, showing the usual method of carrying out our invention;
and
Fig. 2 is an elevation, partly in section, taken at right angles to Fig. 1.
a is an inverted conical sieve, formed of perforated metal, wire gauze, or other
suitable material. The upper part of the sieve is fitted with a ring, by which it is
sustained. A cylindrical vessel e is shown by dotted lines in Fig. 1, which may be
used for collecting the materials, after passing through the sieve. is a ring
frame upon which the sieve is sustained, having three arms e, adapted to rest upon
vessels of various diameters. f is another cylindrical vessel, mounted upon the sieve,
and secured by fly-nuts and screws g g, or otherwise. The sieve may be otherwise
fitted, the frame being sometimes dispensed with, and the flynuts and screws
attached directly to the ring of the sicrc. h is a vertical shaft, carrying the
conically formed helical screw k. m is a footstep fitted in the apex of the sieve.
n is a frame fitted to the vesself. n is the upper bearing for the vertical spindle.
o is a bevel wheel fast on the vertical spindle which is driven by the bevel wheel p
and handler fitted to the frame n.
The screw may consist of two, three, or more threads or helices, which are
formed to correspond with the form of the conical sieve; and the bearings are
sometimes made adjustable, for the purpose of raising or lowering the screw shaft,
and thus bringing the blades of the screw nearer to, or farther from the inner surface
of the conical sieve.
In using the invention the materials to be operated upon are placed in the vessel f,
they then fall upon the screw, which is driven round by the driving gear. The
materials are thus pressed through the meshes of the sieve, reduced to the requisite
degree of fineness.
The size of the meshes in the sieve or screen are suited to the nature of the
materials to be operated upon, and the necessary degree of fineness to which they
are to be reduced. Screens of various sized meshes are provided, so that the
operation can be varied as desired, by merely removing the screen and attaching
another to the cylinder. The materials can thus he passed through several times,
and the refuse cleared away from the inside.
We do not confine ourselves to the precise form of cone shown in the drawings,
as the same may be a paraboloid or of other conoidal form; the screw being varied
to approximate thereto.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In apparatus for the purposes aforesaid, the combination of a conical or conoidal
sieve fitted with a helical screw, substantially as herein before described and
illustrated by the drawings.
2. The general combination and arrangement of the several and respective parts
together forming our invention of Improvements in apparatus for the manufacture
of finings and other analogous materials, substantially as herein before described
and illustrated by the drawings.
GEO. DOWNING,
8, Quality Court, London, W.C., Agent for Applicants.