Improvements in or relating to Sieves or Screens, applicable for Grain Cleaners and other analogous purposes.
Year: 1893

page_text: Date of Application, 28th Nov., 1893
Complete Specification Left, 28th Aug., 1894-Accepted, 29th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Sieves or Screens, applicable for
Grain Cleaners and other analogous purposes.
A communication by DAVID J. DAVIDSON, ABRAHAM S. MARTIN, and STEPHEN
G. MARTIN, all of Port Huron, in the County of St. Clair and State of
Michigan, United States of America.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of The Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street, Manchester,
both in the County of Lancaster and 323 High Holborn in the County of
Middlesex, Civil Engineer do hereby declare the nature of this invention to be as
follows:-
The invention has for its object an improved sieve or screen more particularly
adapted for grain cleaners as well as for analogous uses for which it may be
adapted.
The invention is more specifically designed to provide a corrugated screen, and
it is carried out as follows:-
The sieve or screen is constructed with a series of corrugations, the outer
portions of the corrugations may be either rounded or pointed in cross section. It
must be clearly understood that the invention is not limited to any particular form
of the corrugations nor to any particular number of corrugations of which the
screen shall be formed. The sieve may be perforated in any manner desired, and
may either be made of wire netting or of perforated metal plate as may be preferred.
It will readily be seen that the grain or seed as it passes onward from one end
toward the other of the screen is forced over the corrugations and thereby the
grain or seed is effectually tilted as the screen is agitated so as to effectually cause
those elements of the grain or seed which are desired to be passed therethrough to
be thoroughly screened out in the process of the operation. It will be understood
that the sieve, in operation, would usually be located on an incline. In the process
of the grain or seed across the sieve it will be shaken over the outer or upper edge
of one corrugation into the adjacent inwardly projected channel of the following
corrugation and so effectually rolled and ended over as to prevent the liability of
any seed or grain passing ultimately over the screen which is desired to be screened
out therefrom.
The perforations or meshes in the sieve may be of any desired form and may
also be graduated if desired.
Dated this 27th day of November 1892.
WM. P. THOMPSON & Co.,
•
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Sieves or Screens, applicable for
Grain Cleaners and other analogous purposes.
A communication by DAVID J. DAVIDSON, ABRAHAM S. MARTIN, and STEPHEN
G. MARTIN, all of Port Huron, in the County of St. Clair and State of
. Michigan, United States of America.
1, WILLIAM PHILLIPS THOMPSON F.C.S., M.1.M.E., of The Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street, Manchester, both
in the County of Lancaster and 323 High Holborn in the County of Middlesex,
Civil 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 :-
This invention has for its object an improved sieve or screen more particularly
adapted for grain cleaners as well as for analogous uses for which it may be
adapted. It consists of the devices hereinafter described and claimed and
illustrated in the accompanying drawings, in which :-
Figure 1 is a view in perspective illustrating the invention.
Figure 2 is a longitudinal sectional view on the line 2-2 of Figure 1 ;
Figure 3 is a view similar to Figure 1 and illustrating a modification thereof;
Figure 4 is a sectional view on the line 4-4 of Figure 3.
The invention is more specifically designed to provide a corrugated screen, and
it is carried out as follows:-
A represents any suitable screen. The sieve or screen, as shown, is constructed
with a series of corrugations, as illustrated in the drawings, the outer portions of the
corrugations which are marked A¹, may be either rounded or pointed in cross
section as shown. It must be clearly understood that the invention is not limited
to any particular form of the corrugations nor to any particular number of
corrugations of which the screen shall be formed. The sieve may be perforated in
any manner desired, and may either be made of wire netting or of perforated
metal plate as may be preferred.
It will readily be seen that the grain or seed as it passes onward from one end
toward the other of the screen is forced over the corrugations and thereby the
grain or seed is effectually tilted as the screen is agitated so as to effectually cause
those elements of the grain or seed which are desired to.be passed therethrough to
be thoroughly screened out in the process of the operation. It will be understood
that the sieve, in operation, would usually be located on an incline. In the process
of the grain
or seed across the sieve it will be shaken over the outer or upper
edge A¹ of one corrugation into the adjacent inwardly projected channel A² of the
following corrugation and so effectually rolled and ended over as to prevent the
liability of any seed or grain passing ultimately over the screen which is desired to
be screened out therefrom.
The perforations or meshes in the sieve may be of any desired form and may
also be graduated if desired..
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondents, I declare that what I claim is :-
A corrugated screen substantially as set forth.