Improvements in Apparatus for Separating Substances of Different Sizes or Specific Gravities.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c., Act, 1883), as required by
the decision of the Comptroller General of the 29th day of June 1896.
COMPLETE SPECIFICATION (AMENDED).
Improvements in Apparatus for Separating Substances of Different
Sizes or Specific Gravities.
I, JOHN UNWIN ASKHAM of the Yorkshire Steel and Engineering Works
Sheffield in the County of York, 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 apparatus for separating substances of different sizes or
specific gravities and is specially applicable to apparatus for separating the finer
from the coarser particles of crushed, or ground, minerals and the like.
To prevent the material from clinging to the interior surfaces of such apparatus,
I provide either in the interior, or on the exterior of the apparatus, or both in the
interior and on the exterior a knocking arrangement consisting of a striker, or
strikers, which can be operated from the fan spindle, or otherwise, so as
intermittently strike the apparatus and give to it a vibratory or tremulous motion
which will prevent the particles of material being operated upon from adhering to
the casing, or interior of the apparatus.
The striker, or strikers, may be arranged to act on any suitable part of the
apparatus. In the form shown in the drawing, the striker proper M is carried on
a shaft, or spindle, N, mounted in bearings O, on the casing and on the end of the
said shaft, or spindle, which projects outside the casing is a pulley P, round which
passes a driving band Q. The strap, or hand, Q carries a pair or pairs, of pins, or
tappets, S, which project laterally from the edges of the band,-and come into contact
with arms T, projecting from the shaft, or spindle, carrying the striker M, and
imparts to the said shaft or spindle a motion of partial rotation so as to raise the
said striker. The pins or tappets S then leave the arnis T, whereupon the striker M
falls by gravity assisted if desired by a spring or weight and strikes against the
casing, or against a surface U, attached thereto the concussion thereof causing a
vibratory, or tremulous, motion to be given to the casing which will prevent the
adhesion of the material to the surface thereof. The strap, or band Q may be
provided with any desired number of tappets S to act on the striker successively
at intervals. The striking device is shewn applied to the separator for which Letters
Patent were granted to Messrs. Mumford and Moodie dated 2nd day of February 1885
No. 1455. It is however applicable to other separating apparatus.
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 :-
In apparatus for separating substances of different sizes, or specific gravities,

page_text: a striker, or strikers, caused to intermittently strike the apparatus so as to
impart to it a vibratory, or tremulous motion to prevent the particles from adhering
to the apparatus substantially as hereinbefore described.
Dated 7th day of January 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W,C., Agents.