Improvements in Screening Apparatus for Classifying Material.
Year: 1891

page_text: Date of Application, 16th Mar. 1891
Complete Specification Left, 12th Nov., 1891-Accepted, 9th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in Screening Apparatus for Classifying Material.
Hanns Et MALL IM
Engineer, and CHARLES MOREL of 4 Place de la Gare Grenoble in the Republic
of France, also Engineer, do hereby declare the nature of this invention to be as
follows:-
Firstly. In constructing vibrating screens either flat, inclined conical and circular,
or square in plan, in combination with tappit motions, and of suspending the said
screens with rods and balance beams, or with links or other equivalent connections
so as to allow a free motion thereto, without putting the deadweight of such screen
and its contents upon the tappits or shaft.
In carrying out our said invention as applied to conical screens, we construct a
conical casing with several delivery shoots at its lower extremity for the various
grades of material as separated by the screen to be discharged from.
A skeleton framework forming a cone is covered with suitable gauze or per-
forated plate of the desired inesh and suspended by links, rods or other flexible
connections within the said casing. A revolving shaft with a tappit keyed thereon
runs in suitable bearings and operates upon a projecting arm or rapping plate to
vibrate the screening surface.
One or more conical screens may be arranged in the same framework to make
several classifications.
Secondly. In arranging flat or inclined screens we suspend the same from rocking
beams working upon a shaft from a common fulcrum and with vertical rods capable
of adjustment so as to increase the angle of said screen. Motion is given to one or
more shafts with tappits thereon by means of pullies.
Dated this Twenty-fourth day of February 1891.
CHARLES EDWARD HALL.
CH. MOREL.
COMPLETE SPECIFICATION.
Improvements in Screening Apparatus for Classifying Material.
CHARLES EDWARD HALL of Meersbrook Bank Sheffield, in the County of
York, Engineer, and CHARLES MOREL of 4 Place de la Gare Grenoble, in the
Republic of France, also Engineer, do hereby declare the nature of this invention
and in what manner the same is to be perforined, to be particularly described and
ascertained in and by the following statement :-
In constructing vibrating screens, either flat, inclined, conical, and circular or
square in plan; in combination with tappit motions; and of suspending the said
screens by rods and balance beams, or by links or other equivalent connections, so
as to allow a free motion thereof without putting the deadweight of such screen and
its contents upon the tappits or shaft.
In carrying out our said invention as applied to flat or inclined screens, we
suspend the same from rocking beams working upon a shaft from a common fulcrum
and with vertical rods capable of adjustment so as to increase the angle of the
said screen.
Motion is given to one or more shafts having tappets keyed thereon,
by which means the necessary oscillatory or vibratory motion is communicated to
the screening surfaces.
When square or conical screens are employel, we prefer to arrange such screens

page_text: side by side within a frame and suspend the screening surfaces by links and vibrate
the same by means of a shaft carrying the necessary cam or tappet.
In order that our said invention may be more fully understood reference must be
had to the accompanying sheets of drawings.
Fig. 1 Sheet is a longitudinal vertical section and Fig. 2 is a plan of our said
invention according to the first part.
Fig. 3 is a longitudinal vertical section and Fig. 4 is a plan of same constructed
according to the second part.
Fig. 5 Sheet 2 is a longitudinal vertical section and Fig. 6 is a plan of the
apparatus constructed according to the third part of our said invention.
The same letters of reference denote the same parts in the various drawings.
The machine is composed of a main frame A in which is fixed loosely a rect-
angular box B see Figs. 1 & 2. Sheet 1. in which box screens with different sized
meshes are inserted marked B. B' & B⁹.
133 is the bottom. This box is suspended from rocking levers C. by means of the
suspension rods E adjustable vertically so as to alter the angle. F. F are two
tappit shafts geared together by the drive chain K and chain wheels J & J and
which receive rotatory motion by means of the driving pulley H. G is an adjust-
able slide and screen, one for each side. M. M. are the several delivery orifices for
the various grades of separated material.
Figs. 3 & illustrate our pyramidal screen square in plan. A. is the main
frame. B. the screening surface. B' the pyramidal receiving chamber and spout M.
for the finest material. 13 the second screening cone for the next graded material,
delivering the tailings at M.
B³ is the outer fixed cone delivering the second quality out at M. C is the
rotating shaft driven by the pulley H. Fis the tappit operating both screens.
E. E. are the suspension links. L is the feed opening in all cases.
Figs. 5 & 6 Sheet 2. shews our arrangement of an improved circular conical
screening apparatus and casing. A. is the outer fixed casing to which is attached
the revolving shaft C. and bearings with tappit F and arm G. B is the upper
cone and gauze. B is the lower cone and gauze delivering the fine material
through M. The tailings are delivered through M. C are suspension hooks
secured to the fixed casing A. E. E. are the suspension links. L feed hopper for
supplying the material to be screened or separated.
In all cases the material is fed through the hopper L to the screen and is dis-
tributed over the said vibrating surfaces where the tailings are separated from the
finished material and delivered through separate orifices M'.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :
First. The combination of one or more inclined seives suspended loosely from
rocking levers within a casing and operated by one or more cams or tappits sub-
stantially as described with reference to Figs. 1 & 2 Sheet 1.
Second. The combination of one or more pyramidal screens suspended loosely
by links from hooks or eyebolts within a casing and operated by one or more cams
or tappits substantially as described with reference to Figs. 3 & 4 Sheet 1.
Third. The combination of one or more conical screens circular in plan within a
fixed casing, hanging loosely from links and hooks attached to the said fixed casing
and operated by a cam or tappit substantially as described with reference to Figs. 5
& 6 Sheet 2.
CheffalLL
N2001
CHARLES MOREL.
CHARLES EDWARD HALL.