Improvements in Middlings Purifiers.
Year: 1894

page_text: Date of Application, 13th June, 1894
Complete Specification Left, 13th Mar., 1895-Accepted, 13th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in Middlings Purifiers.
I ARTHUR MAURICE ROBINSON of Railway Works Rochdale in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
The invention relates to middlings purifiers in which there is a vibrating sieve
through which an air current passes in an upward direction and the object is to so
construct such purifier that a current of air passes to the dust chamber through
the tailings as well as through the sieve.
A purifier under my invention has the tailing aperture of the sieve connected to
the delivery spout by means of a flexible connection. The delivery spout is fitted
with an air regulating valve, and the cowl or deflector above the sieve is extended
over the tailings aperture, so as to leave an opening from the said tailings aperture
into the dust chamber.
By the above construction a current of air passes through the tailings into the
dust chamber so as to more effectually free the said tailings from dust.
Dated this 19th dow of Tun 1901
J. JOHNSON,
Agent.
Improvements in Middlings Purifiers.
I ARTHUR MAURICE ROBINSON of Railway Works, Rochdale, in the County
of Lancaster, Eugineer, 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 :—
D
The invention relates to middlings purifiers in which there is a vibrating sieve
through which an air current passes in an upward direction and the object is to so
construct such purifier that a current of air passes to the dust chamber through the
tailings as well as through the sieve.
A purifier under my invention has the tailing aperture of the same connected to
the delivery spout by means of a flexible connection. The delivery spout is fitted
with an air regulating valve, and the cowl or deflector above the sieve is extended
over the tailings aperture so as to leave an opening from the said tailings aperture
into the dust chamber past the worm box.
Fig. 1 is an elevation, and Fig. 2 a longitudinal section of so much of a middlings
purifier as is sufficient to illustrate my invention.
a represents the usual frame, and b, the vibrating sieve. c is the tailings aperture
at the delivery end of the sieve. d, is the delivery spout for the tailings. The
aperture e and spout d are connected by practically air tight flexible material e,
such as leather, canvas, and the like. The delivery spout d is provided with an
air inlet aperture fover which fits a sliding or other suitable regulating valve g.
The usual cowl or deflector 4 above the sieve is extended beyond the siere over
the tailings aperture c so as to leave an opening i from the said tailings aperture
into the dust chumber; past the usual worm or conveyor box k.

page_text: By the above construction a current of air passes through the tailings removing
the dust therefrom and then past the worm box in which the dust is deposited and
finally to the fan inlet & exhaust. In this way the tailings and also the air are
more effectually freed from dust.
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 middlings purifiers in which the tailings aperture of the vibrating sieve is
connected to a tailings delivery spout having an air inlet and valve extending the
cowl or deflector over the said tailings aperture so as to leave an opening into the
dust chamber past the worm or conveyor box for the purpose set forth.
Dated the 11th day of March 1895.
i
J. JOHNSON,
4, Clayton Square, Liverpool, Agent.