Improvements in Purifiers for Middlings and the like.
Year: 1891

page_text: Date of Application, 7th Feb., 1891
Complete Specification Left, 6th Nov., 1991-Accepted, 12th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Purifiers for Middlings and the like.
We, ROBERT WOODALL, of 36 Royds Street, Rochdale, Draughtsman, and
GEORGE BRIDDON, of 4 Summer Villas, Urmston, Draughtsman, both in the
County of Lancaster, do hereby declare the nature of this invention to be as
follows:-
It relates to the class of purifiers used in the preparation of semolina, middlings,
dunst, flour and similar substances, and consists in improved means used for
collecting and removing the purified material and distributing the current of air
over the surface of the silk or other sieve.
It has heretofore been the custom to allow the purified material to fall to the
bottom of a receptacle from which it is removed by means of a worm or similar
contrivance.
In our invention we use, a perforated metal tray or trays for this purpose (or
their equivalent) placed below the silk or other sieve. This tray may be formed
either of corrugated metal (or material) with the perforations in the raised portions,
or a flat tray perforated (or formed) with holes in such a manner as to form a
raised edge round each perforation, or of strips of material suitably formed or flat
either attached to or separate from, each other, or the silk or other sieve, or an
ordinary flat perforated plate.
The perforation of the trays is for the purpose of distributing the current of air
(which we preferably admit below the tray) over the whole surface of the silk or
other sieve.
We remove the purified material from the trays or their equivalent by any
ordinary automatic means such as shaking, brushing, or other suitable contrivance.
Or, in place of the metal tray or trays mentioned above we employ a broad band
of woven or other suitable material, or a series of narrow bauds of woven or other
suitable material, (revolving round rollers beneath the silk or other sieve) through
which or between which the current of air can pass.
Dated the 6th dov of February 1801
JOHN HENRY TOPHAM,
46A, Market Street, Manchester, Agent to Applicants.
COMPLETE SPECIFICATION.
Improvements in Purifiers for Middlings and the like.
We, ROBERT WOODALL, of 36 Royd Street, Rochdale Road, Draughtsman,
and GEORGE BRIDDON, of 4 Summer Villas, Urmston, Draughtsman, both in the
County of Lancaster, 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 :-
It relates to the class of purifiers used in the preparation of semolina, middlings,
dunst, flour, and similar substances, and consists in the improved means used for
collecting and removing the purified material and distributing the current of air
over the surface of the silk or other sieve.
It has heretofore been the custom to allow the purified material to fall to the
bottom of a receptacle, from which it is removed by means of a worm or similar
contrivance.
In one application of our invention we use a perforated tray (or trays) for this
purpose, or their equivalent, placed below the silk or other sieve. This tray may

page_text: be formed, either of corrugated metal, or other suitable material, with the
perforations in the raised portions; or as a flat tray perforated or formed with
holes, in such a manner as to form a raised edge round each perforation; or of
strips of material suitably formed or flat, either attached to, or separate from each
other, or the silk or other sieve; or a simple flat perforated plate.
The perforation of the trays is for the purpose of distributing the current of air
which we preferably admit below the tray) over the whole surface of the silk or
other sieve.
We remove the purified material from the trays or their equivalent by any
ordinary automatic means such as shaking, brushing, or other similar contrivance.
Or, in another application of our invention in place of the metal tray or trays
beforementioned we employ a broad band of woven or other suitable material
(revolving round rollers beneath the silk or other sieve) either from side to side, or
from back to front, through which or between which the current of air can pass.
Or, a perforated metal band passing round drums or larger rollers, may be
substituted for the woven band.
In order that the foregoing may be better understood we send herewith two
sheets of drawings in which:
Fig. 1, shows a side section, (in elevation) and Fig. 2, a cross section (in
elevation) of a purifier fitted with one modification of our invention, a indicating a
corrugated, perforated metal tray, (shown in enlarged section and plan in Figs. 3
and 4) placed beneath the sieve over the under surface of which the air is
distributed equally by the perforations c, the purified material settling in the
corrugations whence it is removed by any ordinary means.
Figs. 5 and 6 show section and plan of a flat metal plate perforated in such a
manner as to form a raised ridge round the edges of the perforations, which may be
substituted for the plate just described, the purified material in this case settling
upon the plate, and being protected from the force of the current of air by the
raised edges c.
Fig. 7 shows, (in section) a series of strips formed so as to form troughs e to
receive the purified material while permitting the air to pass between them.
Figs. 8 and 9 show plan and section of endless band f of woven or similar
material, or of perforated sheet metal passing round rollers g g, for the same
purpose.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is :-
1st. The combination with a purifier of a perforated plate or plates of suitable
material, substantially as described and shown, herein before and in the accom-
panying drawings, for the purpose set forth.
2nd. The combination with a purifier, of a series of suitably formed plates of
suitable material, substantially as described and shown, hereinbefore and in the
accompanying drawings, for the purpose set forth.
3rd. The combination with a purifier, of a broad band, or a series of narrower
bands of woven or other suitable material, substantially as described and shown,
hereinbefore and in the accompanying drawings, for the purpose set forth.
Dated the 5th day of November 1891.
JOHN HENRY TOPHAM,
46A, Market Street, Manchester, Agent to Applicants.