Improvements in and connected with Oscillating Sieves.
Year: 1892

page_text: Date of Application, 10th May, 1892
Complete Specification Left, 10th Feb., 1893-Accepted, 8th Apr.. 1893
PROVISIONAL SPECIFICATION.
Improvements in and connected with Oscillating Sieves.
1, HENRY SIMON, of 20 Mount Street Manchester in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to sieves which have, when in use, a longitudinal
oscillatory motion, and which may or may not have a controllable air current
passing through them. These sieves are as a rule arranged at a slight inclination
and are fed at the upper end, such of the material as fails to pass through the
meshes of the sieve or to be removed by the air current (if used) being delivered
at the lower end. They are usually constructed of a considerable length, and
owing to this fact and to the impracticability of securing rigidity in their con-
struction, and to unavoidable inaccuracy in fitting together the parts which impart
the oscillatory motion, it has been found difficult to secure uniform distribution of
the material upon the sieve, and uniform delivery of the residue, that is to say, to
effect a proper control over the material upon the sieve.
In order to avoid this and other difficulties and defects common to existing
sieves, I arrange to impart the oscillatory motion from the excentric or crank or
excentrics or cranks, through one or more connecting rods. I also arrange in
connection with the sieve and by preference near to its delivery end, means for
controlling the travel of the material without interfering with the oscillatory
motion.
The means which I may employ for this purpose may be variously.constructed
and arranged, but it will be sufficient if I describe the nature of some typical
examples and modifications.
It may consist, for example, of a metallic link pivoted on a pin fixed upon one
side, and preferably near the delivery end, of the sieve, the opposite end of the
link being pivoted upon a pin or stud in an are slot formed or secured on the
opposite side of the framing. The arc slot is in a horizontal plane and is described
with the pivot on the opposite end of the link as a centre. The pin or stud may
be adjustably secured in the arc slot by a screw or nut, and its position controls the
travel of the material on the sieve. In substitution for the link, a cord or chain
may be employed, but since such a means of connection can act in only one
direction, may employ in combination therewith a spring connected with the
sieve and with the framing respectively, and tending always to keep the chain or
cord in tension. Or, instead of the spring, I may employ a second cord or chain,
and a second are slot and stud, similar to the first, but connected with the opposite
sides of the sieve and of the framing respectively.
Precisely the same result may be obtained by compelling a pin or projection
fixed to the oscillating sieve to travel in a slot or guide, which may be arranged by
suitable adjusting devices, either parallel with, or at an angle on either side of, the
line of oscillation. Obviously the positions of the two constituents of the guiding
device may be reversed, that is to say, the pin or projection may be fixed and the
slot or guide be connected with the sieve, but this arrangement is not so easily
operated as the former. Or, instead of such a device, I may employ curved or
inclined guiding surfaces and friction bowls, the surfaces being adjustable. Either
the plates or the friction bowls, preferably the latter, may be fixed upon the sieve,
the other being fixed upon or to a contiguous part of the framing.
Dated thie 0th day of Mox A TO 1800
WILLIAM E. HEYS,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Oscillating Sieves.
I, HENRY SIMON of 20 Mount Street Manchester in the County of Lancaster,
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 :-
longitudinal
This invention relates to that class of sieves which have when in use a
oscillatory motion, and which may or may not have controllable air currents passing
through them.
These sieves are as a rule, arranged at a slight inclination and are fed at the
upper end, such of the material as fails to pass through the meshes of the sieve or
to be removed by the air current (if used) being delivered at the lower end.
As at present constructed they effect an imperfect separation of the material
operated on, through the absence of means for adjustment which it is the object of
this invention to provide. This imperfection may arise from any one or more of
several causes all of which are capable of immediate correction or neutralisation in
sieves to which my improvements have been applied. Amongst these causes may
be mentioned the comparative great length of the sieves and the impracticability of
securing rigidity in their construction; unavoidable inaccuracy in fitting together
the parts which transmit the oscillatory motion and liability to subsequent variation;
the ordinary wear and tear. These and other causes make it difficult to secure
and maintain under ordinary conditions a uniform distribution of the material upon
the sieve so that as ordinarily constructed one side may when at work, be more
lightly covered than the other side.
"My invention consists in the construction application arrangement and com-
bination of means and devices designed to permit a ready correction and adjustment
of the sieve for the purpose of producing uniformity of work, the correction and
adjustment being if desired, capable of being readily effected whilst the sieve is in
full work.
The accompanying drawings illustrate in what manner I may carry my invention
into practical effect and will be hereinafter referred to.
The first form of construction is illustrated in longitudinal section by Figure 1 ;
in plan by Figure 2; and in cross section by Figure 3. A modification is repre-
sented in plan by Figure 4 and a further modification in longitudinal section, plan,
and cross section respectively, by Figures 5, 6, and 7. A full longitudinal section
and plan of the sieve being given in Figures 1 and 2 only those parts of the sieve to
which this invention more particularly relates have been illustrated in and by the
succeeding figures.
A is the driving shaft; B the excentric; C a forked connecting rod driving the
sieve through the pins D; E is the sieve; F the sieve suspending links; and G the
framing of the apparatus. All these parts may be constructed as in existing sieves
or may be modified or substituted as may be required.
In the arrangement illustrated by Figures 1, 2, and 3, a metallic link H is
pivoted upon a pin or stud I, fixed upon one side of and near to the delivery end of
the sieve. The opposite end of this link is pivoted upon a pin or stud K adjustably
fixed in an arc slot L, which may be formed in a bracket M, fixed on the framing G.
The arc slot L is in a horizontal plane and is described with the pivot I as a centre.
The pin or stud K may be adjustably secured in the slot by a screw and nut or by
any other known and suitable means, and its position in the slot controls the travel
of the material upon the sieve.
In the case for example of a purifier sieve in ordinary use in a flour mill, which
is oscillated by means of one or two connecting rods from a crank shaft, the material
is supplied at the head of the sieve in an even stream across the whole width of the
silk. As it travels down the sieve it is subjected to successive currents of air which

page_text: lift the light branny material off the silk and allow the heavier good material to
fall through the meshes. If the wind and the material to be treated are each.
distributed evenly across the sieve the work of separation of the light and heavier
particles is uniformly performed, but if from any cause the layer of material in its
flow down the sieve should get thinner on one side than on the other, the current
of air will pass through the thinner part of the layer and be resisted by the thicker
so that a proper purification is impossible. Also the quantity and quality of the
material treated vary from time to time, necessitating a different strength of air
current and since this current is compelled to pass through the sieve in a more
or less oblique direction, the stronger current tends to blow the material to one side
and a weaker current permits it to pass to the opposite side. In other cases similar
results ensue, which render it very important to be able to correct the travel of the
material at once and if possible without stopping the work. This result is first
accomplished by means of my present invention.
Instead of effecting the adjustment by means of the arc slot, or in addition to
such adjustment, it may be effected by producing a variation in the length of the
link H by any known or suitable menus. For example it may be divided trans-
versely and the contiguous ends be screwed with right and left hand threads
respectively, the screwed parts being connected by a coupling tapped with
corresponding screw threads. In this case since the necessary adjustment may
be effected in the link itself, the slot L instead of being curved may be straight.
The modification represented by Figure 4 resembles in all respects that
illustrated by the previous figures except that the link H instead of being
metallic consists of a cord or chain. Since however such a link can act in one
direction only, I employ in combination therewith a spring N connected with the
sieve and with the framing respectively and tending always to keep the chain or
cord H in tension.
When a flexible link H is employed, the use of the spring N may be dispensed
with by the simple device of duplicating the link pivots and slot as illustrated
by Figures 5 6, and 7. In this case, two are (or straight) slots L L' are fixed
on opposite parts of the framing and have adjustably fixed in them the pins
or studs K K. Also two pins or studs I l' are fixed upon opposite sides of
the sieve. The link H connects stud I with stud K and the link H¹ joins the
studs I and K¹.
The non-rectilinear motion of the sieve may also be prevented by means of guiding
devices as indicated in my Provisional Specification but these produce such an
amount of friction and are so unsatisfactory in practice as compared with the devices
hereinbefore described that I prefer not to employ them.
I am aware that in similar sieves some attempts have been made to steady the
motion of the sieve by fixed links or tie-rods. I desire it therefore to be understood
that apart from means for adjustment for the purpose herein before described, I
make no claim to such links.
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-
1. In an oscillating sieve a link H pivoted at one end to a pin or stud fixed upon
the side of the sieve and at the other end to a pin or stud adjustably secured in a
slot on an opposite part of the framing, substantially as hereinbefore described and
as illustrated by the accompanying drawings.
2. In an oscillating sieve, the combination with a link connecting one side of
the sieve with an opposite part of the framing, of a slot in which a pivot
connecting the link with the framing may be adjustably secured, substantially
as and for the purpose hereinbefore described and as illustrated by the accom-
panying drawings.
3. In an oscillating sieve the combination and arrangement with an adjustable
flexible link H connecting one side of the sieve with the opposite side of the

page_text: framing, of a spring N, connecting the sieve with the framing and tending to keep
the link in tension, substantially as hereinbefore described and as illustrated by the
accompanying drawings.
4. In an oscillating sieve the combination and arrangement with two adjustable
flexible links H H' of two pins or studs II' fixed in the sides of the sieves, and two
pins or studs K K¹ adjustably secured in slots, substantially as and for the purpose
herein before described and as illustrated by the accompanying drawings.
Dated this 9th day of February A.D. 1893.
WILLIAM E. HEYS,
Agent for the Applicant.