Improvements in or connected with Screen Cut Offs, applicable for Use with Grain Cleaners, Puriflers, and Graders, and other 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 connected with Screen Cut Offs, applicable for
Use with Grain Cleaners, Puriflers, and Graders, and other
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.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:-
°
This invention relates to certain improvements in a screen cut off, and it consists
of the construction, combination and arrangement of devices and appliances herein-
after specified.
The purpose of this invention is to provide a cut off for a screen, whereby any
desired grade of grain, flour, or other material may be readily cut off, or impurities
be separated therefrom. The screen cut off is adapted and designed for use
with grain cleaners, purifiers and graders of various kinds, and for a variety of
purposes.
In carrying out the invention, a screen may be constructed in any desired manner.
It may be supported so as to be readily agitated in any proper manner, as by an
eccentric.
Beneath the screen is located a channelled or grooved bottom, constructed with a
series of discharge openings, preferably arranged in lines, so that a series of them
can be controlled by a single valve or slide, a series of such slides being employed,
the same being preferably provided with operating handles. Beneath the grooved
or channelled bottom and beneath the discharge openings is located a series of
spouts or ducts, a spout being located under each series of discharge orifices,
so that, when one of the slides is drawn, the grain or other material will
drop through the corresponding series of discharge openings into the corresponding
spout. The different series of discharge openings may be separated one from
another by intermediate strips lying lengthwise of the slides. The channels or
grooves in the bottom may be formed by suitable walls or partitions, extending at
right angles to the slides. These walls or partitions may be of an inverted V shape.
The invention is not, however, limited to any particular construction of the bottom,
since it may be constructed in any desired manner, and may be provided with any
desired construction and arrangement of discharge orifices, controlling valves or
slides. The bottom has no direct connection or engagement with the screen frame.
It is independent thereof except that both are supported or may be supported upon
the same machine frame. The bottom, with its spouts, is made agitable in any
suitable manner, as, for example, by means of an eccentric engaged therewith.
The bottom is agitated at right angles to the agitation of the screen, but the
invention is not limited to this precise method of agitating the channelled bottom,
within scope
it may,
of the invention, be operated in the same direction as the
The spouts are extended at right angles to the direction in which the sieve
is agitated, but the invention is not limited to the extension of said spouts in this
particular direction, as the invention contemplates any suitable construction of an
independent cut off bottom underneath the sieve, provided with cut off slides or
as
screen.

page_text: valves, whereby the grain or other substance may be cut off at any desired point.
The cut off bottom with its ducts may rest upon a swinging cross bar while the
sieve may be supported by links. The screen and cut off bottom may be supported
in any suitable manner so as to be agitated the one independently of the other.
"..
Dated this 27th day of November 1893.
WM. P. THOMPSON & Co.,
Agents for the Applicant.
Improvements in or connected with Screen Cut Offs, applicable for
Use with Grain Cleaners, Purifiers, and Graders, and other
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 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 certain improvements in a screen cut off, and it consists
of the construction combination and arrangement of devices and appliances herein-
after specified and claimed and illustrated in the accompanying drawings, in which,
Figure 1 is a view in perspective illustrating the invention.
Figure 2 is a vertical cross section through line 2-2 Figure 1 and
Figure 3 a section at right angles to Figure 2.
The purpose of this invention is to provide a cut off for a screen whereby any
desired grade of grain, flour, or other material may be readily cut off, or impurities
be separated therefrom. The screen cut off is adapted and designed for use
with grain cleaners, purifiers and graders of various kinds and for a variety of
purposes.
The invention is carried out as follows-
As
A represents a screen which may be constructed in any desired manner.
shown, it may be supported so as to be readily agitated in any proper manner, as by
an eccentric B. A is the screen frame.
Beneath the screen is located a channelled or grooved bottom C constructed
with a series of discharge openings c preferably arranged in lines so that a series
of them can be controlled by a single valve or slide D as shown, a series of such
slides being employed, the same being preferably provided with operating handles d.
Beneath the grooved or channelled bottom C and beneath the discharge openings c
is located a series of spouts or ducts c', a spout being located under in each series of
discharge orifices so that when one of the slides is drawn the grain or other material
will drop through the corresponding series of discharge openings into the corre-
sponding spout. The different series of discharge openings may be separated one
from another by intermediate strips lying lengthwise of the slides. As shown,
the channels or grooves in the bottom C are formed by suitable walls or partitions C³
extending at right angles to the slides. These walls or partitions C may be of an
inverted V shape. The invention is not however limited to any particular
construction of the bottom C since it may be constructed in any desirable manner
and may be provided with any desired construction and arrangement of discharge
orifices controlling valves or slides. It will be observed by reference to the
drawings that bottom C has no direct connection or engagement with the screen

page_text: frame. It is independent thereof except that both are supported or may be
supported upon the same machine frame. The bottom C with its spouts C¹ is
made agitable in any suitable manner, as for example by means of an eccentric C³
engaged therewith. By a comparison of Figures 2 and 3 it will be observed that
the bottom C is agitated at right angles to the agitation of the screen A but
the invention is not limited to this precise method of agitating the channelled
bottom C as it may within scope of the invention be operated in the same direction
as the screen. As shown in the drawings, the spouts C¹ are extended at right
angles to the direction in which the sieve is agitated, but the invention is not
limited to the extension of said spouts in this particular direction as the invention
contemplates auy suitable construction of an independent cut off bottom underneath
the sieve provided with cut off slides or valves whereby the grain or other substance
may be cut off at any desired point as shown in Figure 2. The cut off bottom
with its ducts C' are shown resting upon a swinging cross bar E, while the sieve is
shown supported by links F. The screen and cut off bottom may be supported in
any suitable manner so as to be agitated the one independently of the other or both
simultaneously in the same or different directions.
G denotes a machine frame upon which both the sieve and the cut off bottom.
are supported but they may be supported in any other suitable way.
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:-
1. The combination with a screen of an independent cut off bottom provided with
a series of discharge orifices and means to control said orifices, substantially as set
forth.
2. The combination with a screen of an independent cut off bottom whereby the
commodity passed through the screen may be cut off at any desired point substan-
tially as set forth.
3. The combination with a screen of an independent cut off bottom provided with
discharge orifices, and means for controlling said orifices, and the series of spouts
located below said orifices, substantially as set forth.
4. The combination with a screen of an independent cut off bottom provided with
a series of discharge orifices, and means to control said orifices the discharge
orifices of each series arranged in line substantially as set forth.
5. The combination with an agitable sieve of an independently agitable cut off
bottom, substantially as set forth.
6. The combination with an inclined screen, of a bottom located therebeneath,
means for vibrating said bottom and screen, a series of transverse inverted V-shaped
partitions separating said bottom into a series of troughs, ported slides to open the
bottom of said troughs at any desired position, and chutes arranged beneath each
of said slides, substantially as and for the purposes described.
Dated this 27th day of August 1894.
WM. P. THOMPSON & Co.,
Agents.