Improv about the same Size but of Different Weight.
Year: 1889

page_text: Date of Application, 19th Mar., 1889
Complete Specification Left, 27th Mar., 1889
Complete Specification Accepted, 4th May, 1889
Improv
about the same Size but of Different Weight.
A communication from abroad by OLOF SUNDGREN, of Oestersund, in the Kingdom
of Sweden, Land Surveyor.
I, WILLIAM PHILLIPS THOMPSON. F.C.S. M.L.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 a mode of separating particles of about the same size but
of different weight, by throwing the particles in the air. This mode is specially
applicable for sorting ores and minerals in general, but may also be employed for
other matters. Matters which are to be separated, must first, if they are in large
masses, be pulverized. Then the pulverized particles are separated by means of
cribling, in heaps of equal sized pieces, which are then treated by throwing.
The throwing is performed as follows.-
The particles of about equal size are fed into a machine, from which they are
thrown out at an angle of 20 degrees to 70 degrees above the horizontal line. By
thus throwing out the particles at an angle above the horizontal line and by adapting
the angle to suit the different nature of the particles, the greatest possible range may
be obtained, which is an indispensable condition for obtaining a good separation.
It may be a
The throwing machine can be arranged in many different ways.
centrifugal throwing machine, the throwing disc of which, being fixed on a vertical
shaft, has the shape of a cone with the point directed downwards. A wheel fixed on
a horizontal shaft may also be used, the circumference of the wheel being provided
with teeth or equivalents, and upon this wheel the particles are fed down. By the
teeth of the revolving wheel the particles receive shocks by which they are thrown
out in the air. By changing the point of inlet the angle of expulsion may be varied

page_text: With the above throwing machines can also be combined the action of air currents,
co-operating with the direct mechanical action of the machine. It is obvious that
other throwing machines may be used.
By the proceeding described above, a much better separation is effected than by
methods previously used for throwing out the particles in a horizontal plane.
Dated this 18th day of March 1889.
WM. P. THOMPSON & Co.,
Agents for the Applicant.
Improvements in or relating to the Separation of Particles having
about the same Size but of Different Weight.
A communication from abroad by OLOF SUNDGREN, of Oestersund, in the Kingdom
of Sweden, Land Surveyor.
f.
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 a mode of separating particles of about the same size but
of different weight, by throwing the particles in the air. This mode is specially
applicable for sorting ores and minerals in general, but may also be employed for
other matters. Matters which are to be separated, must first, if they are in large
masses, be pulverized. Then the pulverized particles are separated by means of
cribling in heaps of equal sized pieces, which are then treated by throwing.
The throwing is performed as follows:
The particles of about equal size are fed into a machine, from which they are
thrown out at an angle of 20 degrees to 70 degrees above the horizontal line. By
thus throwing out the particles at an angle above the horizontal line and by adapting
the angle to suit the different nature of the particles, the greatest possible range may
be obtained, which is an indispensable condition for obtaining a good separation.
The throwing machine can be arranged in many different ways. It may be a
centrifugal throwing machine, the throwing disc of which, being fixed on a vertical

page_text: shaft, has the shape of a cone with the point directed downwards. A wheel fixed
on a horizontal shaft may also be used, the circumference of the wheel being
provided with teeth or equivalents, and upon this wheel the particles are fed down.
By the teeth of the revolving wheel the particles receive shocks by which they are
thrown out in the air. By changing the point of inlet, the angle of expulsion may be
varied. With the above throwing machines can also be combined the action of air
currents, co-operating with the direct mechanical action of the machine. It is obvious
that other throwing machines may be used.
By the proceeding described above, a much better separation is effected than by
methods previously used for throwing out the particles in a horizontal plane.
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 correspondent, I declaro that what I claim is:
The improvement in the process of separating particles from each other which
are of almost the same size but of different specific weight, by throwing out the
particles in the air by which their ranges become different, according to their
different specific weights, the said improvement consisting essentially in throwing
the particles out from the throwing machine not in horizontal lines but at an angle
of 20 degrees to 70 degrees above the horizontal plane substantially as described.
WM. P. THOMPSON & Co.,
Agents for the Applicant.