Improvements in Apparatus for Sifting.
Year: 1894

page_text: Date of Application, 2nd May, 1894
Complete Specification Left, 4th Feb., 1895-Accepted, 9th Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Sifting.
CHARLES HESSEY STUBLEY No. 2 Whitehead Street off Robin Hood Chase
Nottingham in the County of Nottinghamshire, Miller, do hereby declare the
nature of this invention to be as follows:-
The apparatus consists of a sieve frame of a suitable size and shape this frame is
supported by a shaft preferably passing through horizontally from end to end.
The frame preferably carries three sieves two of which are slightly inclined in
opposite directions and are supported in the sieve frame by one two or more springs
the springs are preferably fastened to the sieve and, set lengthwise the springs pro-
jecting over each end of the sieve are allowed to lodge in suitable bearings or
supporting plates attached to the sieve frame or the springs may be fastened to the
inside of the sieve frame and thus carry the sieves.
The third or bottom sieve consists of a number of ribs which may form a
circularly oval or octagon shaped sifting surface.
Inside the sieve frame to divide the top sieve or sieves from the bottom sifting
surface I supply a petition and working between this petition and the bottom
sifting surface I supply a number of blades or beaters revolving in opposite direction
to each other.
c
Motion is given to the sieve frame and beaters by means of a crank shaft
running parallel to the shaft which carries the sieve frame, this shaft carrying
the sieve frame is driven by a crank or cranks by means of a connecting rod
or rods thus giving to the sieve frame a rocking or oscillating motion. The
connecting rod or rods may be coupled to the sieve frame.
The sieve frame having a rocking motion the sieves on springs thus receive
both a rocking and side to side motion at the same time which agitates the material
as desired.
The sieves are checked by straps or suitable appliances thus giving the desired
effect on the material to be sifted.
The blades or beaters are driven by a belt or belts from a pulley or pulleys,
these pulleys are loose on the shaft which supports the sieve frame and are driven
from a pulley on the crank shaft or they may be driven by a cog wheel on the shaft
supporting the sieve frame.
The improvements may be used either together or separately.
Dated this 27th day of April 1894.
Improvements in Apparatus for Sifting.
I CHARLES HESSEY STUBLEY of 2 Whitehead Street, Robin Hood Chase,
Nottingham, Miller, 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 invention relates to apparatus for sifting granular or finely divided materials,

page_text: and is specially applicable for use in the reduction of grain into meal and flour.
The main object is to provide simple apparatus whereby more efficient sifting is
obtained.
Apparatus under my invention consists of a sieve frame of suitable size and shape
supported by a shaft preferably passing horizontally through the said frame from
end to end. The said frame preferably carries three sieves, two of which are slightly
inclined in opposite directions, and one supported in the frame by one, two, or more
springs. The springs are preferably fastened to the sieve and set lengthwise pro-
jecting over each end or side of the sieve to suitable bearings or supporting plates
attached to the sieve frame or the said springs may be fastened directly to the
inside of the sieve frame and thus carry the sieves.
Inside the sieve frame to divide the top sieve or sieves from the bottom
sifting surface, I supply a partition and working between said partition and the
bottom sifting surface I supply a number of blades or beaters.
Motion is given to the sieve frame and with it to the sieves by means of a
crank or equivalent shaft running parallel to the shaft which carries the sieve
frame. The said shaft carrying the sieve frame is driven or caused to oscillate
by means of a crank or cranks and connecting rod or rods, or other suitable
means may be used for giving the sieve frame a rocking or oscillating motion.
The connecting rod or rods may be coupled to the sieve frame instead of to
the frame shaft. On the sieve frame having a rocking motion imparted to it
the sieve on the springs receives both a rocking and side to side motion at the
same time which agitates the material as desired. The motion of the said sieve
is checked by straps or suitable appliances to give the desired effect on the
material to be sifted.
DESCRIPTION OF THE DRAWINGS.
Figs. 1 and 2 are vertical sections at right angles to each other of sifting
apparatus constructed in accordance with my invention. a is a sieve frame of any
suitable size and shape supported by a rocking shaft b, passing through the said
frame from end to end. Fixed to the upper part of the frame are two sieves c
preferably inclined upwards at each side towards c', c', so that as the rock sideways,
the material being sifted may be thrown towards the centre. One, three, or more
sieves may be used, but I prefer to use two. d, are longitudinal dividing pieces to
assist in maintaining the material being sifted equally spread. e, are springs
fastened lengthwise to the third sieve and projecting over the sides to plates or
bearings g, attached to the sieve frame a. The said springs e may be placed
horizontally instead of vertically, in which case their ends would be attached to the
depending portions as shown by dotted lines a¹ of the frame a. h, is a partition
inside the sieve-frame separating the top sieves c from the sifting surface of the
bottom sieve f. i, cover to the sieve f. j, flexible trunk leading the sifted material
from the top sieves to the bottom sieve. feed way to the top sieve. I tailings
outlet for the top sieve. m tailings outlet for the bottom sieve. n discharge way
for sifted material from the bottom sieve. o are rope beaters between the
partition / and the sieve f. o'beaters on the top sifting surface. The beaters may
be of any usual construction. P, is a driving shaft carrying cranks or excentrics 7,
which by means of the connecting rods r, coupled to arms, on the rocking shaft b,
give oscillating motion to the said shaft, and with it to the sieve frame and sieves.
t, are straps or equivalent devices coupled to snugs u, on the sieve fand to the fork
on the shaft b. w, screws and nuts for adjusting the slack of the straps t, so as to
control the jerk given to the lower sieve at each end of its stroke.
It will be observed that the top sieves have a regular quiet lateral oscillating
motion whilst the lower sieve has on account of the spring and strap connections a
rapid sideways and jerky motion so that the material operated on is subjected to a
double action which produces greater sifting efficiency than can be obtained by the
usual systems.

page_text: It will be obvious that apparatus may be constructed with more than two
heights of sieves and that the suspending springs may be variously constructed.
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 :-
First. In sifting apparatus, a laterally oscillating sieve frame and sieves.
Second. In sifting apparatus, a laterally oscillating sieve frame and sieves having
inclined sifting surfaces.
Third. In sifting apparatus, a laterally oscillating sieve frame with an upper
sieve or upper sieves secured thereto and with a lower sieve or sieves suspended
therefrom by springs.
Fourth. In sifting apparatus a laterally oscillating sieve frame with an upper
sieve or upper sieves secured thereto and with a lower sieve or sieves suspended
therefrom by springs and controlled as to lateral motion by straps or like flexible
agents.
Fifth. Sifting apparatus constructed substantially as herein set forth.