Grain, and for Separating or Sifting other Materials.
Year: 1886

page_text: Date of Application, 12th Aug., 1886.
Complete Left, 13th June, 1887.
Complete Accepted, 19th July, 1887.
Grain, and for Separating or Sifting other Materials.
I CHARLES LAMPITT, of Nelson Villa, Bound's Green, in the county of Middlesex,
Millwright and Engineer do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in sieves or apparatus for grading barley'
oats, wheat and other grain and seeds, also for separating or sifting other materials.
The great objection to such sieves or grading apparatus as hitherto constructed is
their liability to clog, and my invention has for object to construct a sieve or grading
apparatus which shall be practically free from this defect.
In carrying out my invention I form my improved sieve or grading apparatus of a
number of bars as has hitherto been done, arranged in a frame or in a cylinder, but
according to my invention the said bars are so arranged that by the motion of the
sieve or apparatus, the bars shall be caused to partially rotate on their axes, or the
said bars are adapted to be rotated or partially rotated by any suitable mechanical
arrangement.
I also propose, in some cases, to so arrange the bars of the sieve or grading
apparatus, that the said bars or some of them can be raised so as to vary the spaces
between the bars as may be required to suit different samples to be graded.
101 1
1000
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Sieves or Apparatus for Grading Barley and other
Grain, and for Separating or Sifting other Materials.
I CHARLES LAMPITT, of Nelson Villa, Bound's Green, in the county of Middlesex,
Millwright and 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 :-
My invention relates to improvements in sieves or apparatus for grading barley, oats,
wheat and other grain and seeds, also for separating or sifting other materials.
The great objection to such sieves or grading apparatus as hitherto constructed is
their liability to clog, and my invention has for object to construct a sieve or grading
apparatus which shall be practically free from this defect.
In carrying out my invention I form my improved sieve or grading apparatus of a
number of bars, as has hitherto been done, arranged in a frame or in a cylinder, but
according to my invention the said bars are so arranged that by the motion of the
sieve or apparatus, the bars shall be caused to partially rotate on their axes, or the
said bars aro adapted to be rotated or partially rotated by any suitable mechanical
arrangement.
In order to enable my invention to be fully understood I will describe how the same
can be carried into practice by reference to the accompanying drawings in which
figure 1 is a side elevation of an inclined cylindrical sieve or apparatus for grading
barley and other grain and for separating or sifting other materials constructed
according to my invention, the supporting frame of the said apparatus being shewn in
section; figure 2 is an end view of the same; figure 3 is a plan of part of an inclined
flat sieve constructed according to my invention, and figure 4 is a section of the same.
Similar letters of reference indicate similar parts throughout the several figures of the
drawings.
Referring to figures 1 and 2, a, a, represent the bars which are mounted in end
ring-plates b, 61, and which can be partially rotated therein; c, c, represent
intermediate ring-plates in which the bars a, can also be partially rotated and which
with the end plates b, 61, are tied or stayed together by tie bolts and distance pieces d, d,
or by other suitable means. As shewn clearly at figure 2, the rods a, a, project
through the end plate b, and their projecting ends are bent so as to form cranks e, e,
by means of which a partial rotary motion is communicated to the rods; f, f, represent
curved plates concentric with the axis of the rotary sieve and 9, 9, represent brackets
rigidly secured to the ring-plate b, and in which the plates f, slide in the direction of
their length. The plates f, have formed therein a number of slots each of which
receives the ends of three of the cranks e, this being a convenient number but, if
desired, I can operate the said cranks singly or in clusters of two, four, or more;

page_text: h, h, represent projections similar to ratchet teeth formed on the plates f, and i, repre-
sents a pawl which, by engaging with the said projections h, h, operates the cranks e,
as hereinafter described;j, represents a bracket rigidly secured to the frame or stand k,
of ordinary construction and on which the pawl i, is pivotted; 1, represents a spiral
spring for causing the said pawl i, to return to its normal position after having been
released from the projections h, as hereinafter described, and p, represents a stop
against which the said pawl bears when in such position; m, m, represent spiral
springs the opposite ends of which are secured respectively to eyes n, n, on the ring
plate b, and to eyes o, o, on the sliding plates, so as to draw the sliding plates back
into their normal position after having been moved therefrom by means of the pawl i,
and projections ; the springs m, are each weaker than the spring 1, under the tension
of which they are individually caused to yield.
When the herein before described cylindrical sieve is rotated in the direction
indicated by the arrows at figure 2, each of the projections h, in succession is caused
to abut against the pawl i, and the plates f, and the outer ends of the cranks e, are
therefore held stationary, the brackets g, g, meanwhile will slide along the said plates,
and the springs m, will become extended by reason of the superior pressure of the
spring, until one of the brackets g, abuts against the rear end of one of
the projections h, as shewn at figure 2, and thus forces the engaging projection h,
past the spring pawl i. Immediately the projection h, has been released from the
pawli, the displaced plate f, and the outer ends of the cranks e, contained therein are
drawn by the spring m, forwards into their normal position, and the pawl i, also
immediately assumes its normal position under the influence of its spring 1, and thus
is ready to operate the cranks e, by the next approaching projection h.
From the foregoing description of operations and by especial reference to figure 2
of the accompanying drawings it will be seen that as the bars a, approach and depart
from their highest position they are caused to partially rotate by each successive
projection h, engaging with the pawli, and the adjacent rounded surfaces of the said
bars being thereby moved in opposite directions, any grain or other material which
has previously become jammed between the bars is speedily liberated and falls into the
grain or other material being sifted in the part of the sieve which is then lowermost.
Upon each of the plates, represented upon the annexed drawing I have shewn
three projections h, but this number may obviously be modified to suit the number of
times it is required to partially rotate the bars a, at each revolution of the sieve. It
is to be observed also that the plates f, and the end clusters of cranks e, contained
therein must be arranged so as to avoid their coming in contact with each other.
In figures 3 and 4 which shew my improvements applied to an inclined flat
sieve, q, q, are the two wooden or other springs by which the sieve is supported
obliquely, which springs are secured to the casing or some other fixed or stationary
part of the machine as usual. In figure 4, r, represents a crank which by means of a
connecting rods, imparts the necessary shaking or reciprocating motion to the sieve
frame t, in the usual manner; f³, represents the plate or bar with which I provide the
sieve and which in a manner similar to the plates f, hereinbefore described when
referring to figures 1 and 2, is slotted to receive the ends of the cranks e, and is
supported in brackets g, g; u, represents a short link one end of which is coupled to
the bar f, and the opposite end of which is pivotted to a stationary bracket or
other fixed part of the casing.
When the sieve is operated the link u, is caused to move through part of a circle as
indicated in dotted lines at figure 3, and the path of the sieve frame being restricted
to a straight line the bar f, will obviously be caused to move sidewise or at a right
angle thereto and the bars a, are thereby operated by means of their cranked ends.
I have described and illustrated by way of example two suitable mechanical
arrangements which I have found to answer well for giving a partial rotation to the
bars of sieves or apparatus for grading barley and other grain and for separating or
sifting other materials according to my invention, but I wish it to be understood that
I do not confine myself to the said mechanical arrangements nor to the application of
my invention to the class of sieves described and shown.

page_text: Further if required instead of the bars being arranged to only partially rotate they
could be made to alternately entirely rotate and remain stationary for a limited time,
but I do not advise this arrangement.
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. A sieve or apparatus for grading barley and other grain and for separating or
sifting other materials, the bars of which are so arranged that they are caused to rotate
or partially rotate on their axes by the motion of the sieve or apparatus.
2. The arrangement of mechanism for effecting the partial rotation of the bars of
sieves or like apparatus as hereinbefore described and illustrated in the accompanying
drawing.
3. The improved sieves or apparatus for grading barley and other grain and for
separating or sifting other materials, hereinbefore described and illustrated in the
accompanying drawings.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.