Improvements in and relating to Sifting or Screening Machines.
Year: 1890

page_text: Date of Application, 3ra Apr., 1890
Complete Specification Left, 5th Jan., 1891-Accepted, 7th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in and relating to Sifting or Screening Machines.
I, HENRY JOHN LYE, of East Street, Crewkerne, in the County of Somerset,
Builder, do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to improvements in sifting or screening machines, the
improvements being especially applicable to machines for sifting damp or moist
materials such as sand, gravel and the like.
In carrying out the invention I provide a frame the upper portion of which is
inclined and to which is attached a movable framework to receive a screen of wire-
gauze, perforated iron, or other suitable material. The framework which carries
the screen is advantageously moved to and fro by means of cranks and connecting
rods operated from a gear wheel fixed in the lower frame, which wheel is driven
by a larger wheel gearing therewith. Beneath the screen is a flap, forming a shoot
for removing the sifted material; which flap has a vibratory or up and down move-
ment communicated to it and which is of great advantage when screening moist or
damp materials which bind together such as gravel, sand and the like.
The material is fed onto the screen by a hopper, the mouth or discharge opening
of which may be opened or closed to the required extent and kept in any desired
position. Below the mouth or discharge opening of the hopper is a hinged flap
which has an up and down movement communicated to it preferably by the to and
fro movement of the screen whereby the material to be sifted is distributed or
spread over the surface of the top end of the screen.
The screens being removable the size of the mesh or openings may be altered as
required and the machine be made available for sifting or screening materials of
all kinds.
1
1 of Amil 1900
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Sifting or Screening Machines.
I, HENRY JOHN LYE, of East Street, Crewkerne, in the County of Somerset,
Builder, 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 relates to improvements in sifting or screening machines, the said
improvements being especially applicable to machines for sifting damp or moist
materials such as sand, gravel and the like.
In carrying out the invention I provide a frame the upper portion of which is
inclined and to which is attached a movable framework to receive a screen of wire-
gauze, perforated iron or other suitable material. The framework which carries
the screen is advantageously moved to and fro or up and down by means of cranks
and connecting rods operated from a gear-wheel fixed in the lower frame, which
wheel is driven by a larger wheel gearing therewith. Beneath the screen is a flap
or board forming a shoot for receiving and delivering the sifted material; which
flap or board has a vibratory or up and down movement communicated to it and
which is of great advantage when screening moist or damp materials which bind
together such as gravel, sand and the like.
The material is fed onto the screen by a hopper, the mouth or discharge opening
of which may be opened or closed to the required extent and kept in any desired
position. Below the mouth or discharge opening of the hopper is a hinged flap or

page_text: board which has an up and down movement communicated to it, preferably by the
to and fro movement of the screen, whereby the material to be sifted is distributed
or spread over the surface of the top end of the screen. Sometimes I arrange
that the said to and fro movement is imparted to one of the sides of the mouth
or discharge opening of the hopper so as to produce a vibratory movement of the
said side.
To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawing, in which :-
:-
Figure 1 is a side elevation of my improved screen;
Figure 2 is a plan of the same;
Figure 3 is a section on the line of Figure 1; and,
Figure 4 is a sectional view of the hopper and adjacent parts.
a is the frame of the machine, which is advantageously provided with wheels 6
and handles c to facilitate the movement of the machine from place to place, and the
upper side of which is inclined, as shewn.
d'is the framework for carrying the screen, which framework is adapted to be
reciprocated longitudinally upon the said frame; and e is the screen carried in the
said framework.
fis the gear-wheel through the medium of which motion is imparted to the screen,
the said gear-wheel being mounted upon a shaft g on the frame a and provided with
a crank-handle h. i is a crank-shaft carried in bearings in the frame a and driven
from the wheelf through the medium of the gear-wheel k secured thereon; the said
gear-wheel, as shewn in the drawing, being provided with a pin to serve as one of
the cranks., are connecting rods through the medium of which the motion of
the crank-shaft is transmitted to the screen, the said rods being connected to
pins m, m carried by plates n, n attached to the framework d which also project
into guide slots m', m' in the frame a.
n', n' are similar plates carrying pins also projecting into guide slots.
o is the flap or board arranged beneath the screen e and carried upon the
pivots p, p in the frame a, so that a vibratory motion can be imparted thereto; as
shewn, this vibratory movement is imparted to the said flap by a pin k' on the
wheel k, which pin during its movement with the said wheel is adapted to strike
against an extension q on the said flap.
gear-
is the hopper provided with a doors for regulating the size of the discharge-
opening, and with a slotted segment by means of which the said door may be
fixed in any desired position, for instance, in that indicated by the dotted lines in
Figure 4.
u is the hinged flap or board arranged beneath the mouth or discharge-opening
of the hopper, and adapted to be oscillated so as to shake the material falling onto
it from the hopper into the screen and thereby more or less distribute the same.
As shewn in the drawing this flap u rests upon the upper edge of the screen-
carrying-frame d, which is inclined, so that during the reciprocation of the said
frame, an up and down movement will be imparted to the board, that is to say, if
the screen-carrying-frame is moved forward, the said board will be raised to the
position indicated by the dotted lines in Figure 4, and returned to its normal
position when the screen moves in the opposite direction.
As shewn in dotted lines in Figure 4 I sometimes use a link with which I
connect the doors to the flap u so that the up and down movement of the said flap
will impart a vibratory movement to the said door s.
The screens are made removable, so that the size of the mesh or openings may be
varied as required and the machine be made available for sifting or screening
materials of all kinds.
Having now particularly described and ascertained the "nature of my said'inver
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. A sifting or screening machine having a vibratory board or flap arranged

page_text: manner, and for the purpose,
beneath the screen, substantially in the
specified.
2. In a sifting or screening machine, the combination with the hopper of a
hinged board adapted to be vibrated substantially as, and for the purpose,
described.
3. In a sifting or screening machine having a vibrating hinged board as referred
to in the preceding claiming clause making a portion of the hopper vibratory and
connecting it to the said vibrating hinged board so as to move therewith,
substantially as described.
4. In a sifting or screening machine, the combination of a vibratory board
arranged beneath the hopper, and a vibratory board arranged beneath the screen
proper, substantially as, and for the purpose, described.
5. The manufacture and use of the improved machine hereinbefore described and
illustrated in the accompanying drawing.
Deted the 5th day of January 1891
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.