Improvements in or applicable to Sifting Machines for Potter's Olay or other Substances.
Year: 1897

page_text: Date of Application, 10th Sept.,
1897
Complete Specification Left, 10th June, 1898-Accepted, 23rd July, 1898
Improvements in or applicable to Sifting Machines for Potter's
Olay or other Substances.
I, WILLIAM BOULTON, of Providence Foundry, Burslem, Staffordshire, Engineer,
do hereby declare the nature of this invention to be as follows:―
This invention relates to certain improvements in or applicable to sifting
machines for potter's slip or clay or other substances.
In constructing the improved sifting machine, I arrange, within a suitable
framing, a tier of three separate lawns or sieves (hereinafter referred to as
"lawns") one over the other, or I may likewise arrange any convenient number of
series of such tiers, arranged side by side, within separate compartments of the
frame, or one tier over another, and at the back of the tiers or of each tier of
three lawns, or of each laterally adjacent series of tiers of lawns, I arrange a
driving shaft carried by bearings projecting from the machine frame and provided
opposite each tier of three lawns with an excentric common to such opposite tier,
and by means of which the lawns of such tier are respectively and simultaneously
actuated. This, I effect by connecting an excentric strap (actuated by said
excentric) with the respective lawns of the tier, by flexible connections, as regards
the upper and lower lawns of the tier, and by a rigid connection, as regards the
middle lawn of the tier, opposite which latter the shaft and excentric are arranged,
the flexible connections to the upper and lower lawns being deflected by guiding
pulleys so as to effect a pulling action on the lawns in the required direction, the
return motion of such lawns being effected by springs attached to the machine
frame and which tend to keep the flexible connections taut; while both motions of
the middle lawn are effected by said rigid connection from the excentric.
The lawns are suspended, with a corresponding inclination, from the machine-
frame, by flexible connections which permit of their being freely oscillated by the
means described, and they are respectively situated above a tier of trays, having a
corresponding inclination but opposite to that of the lawns, and into which the
sifted material falls, and from the lower end of each of which it escapes to the
upper end of the next lower and finer lawn, the bottom tray delivering the slip in
a properly finished condition not needing further sifting treatment, into a con-
venient receptacle, and the top sieve receiving its supply from a top tray to which
the material to be treated is directly supplied.
In the lower end of each lawn is made a slot through which the coarser parts
(termed the knottings") of the material, which are too coarse to pass through the
lawn, pass, delivering onto a projecting flange from which the knottings fall into a
box at the foot of the machine, the front of which is protected by a splash-board.
Dated this 8th day of September 1897.
DAY, DAVIES & HUNT,
Chartered Patent Agents, 321, High Holborn, London, W.C.,
Agents for the Applicant,

page_text: Improvements in or applicable to Sifting Machines for Potter's
Clay or other Substances.
I, WILLIAM BOULTON, of Providence Foundry, Burslem, Staffordshire, 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 follow-
ing statement :-
This invention relates to certain improvements in or applicable to sifting
machines for potter's slip or clay or other substances, and is hereinafter described
with reference to the accompanying drawings, on which,
Fig. 1, represents a sectional elevation through A-B, Fig. 2;
Fig. 2, represents a sectional plan through C-D, Fig. 1.
Fig. 3, represents a front elevation with the knottings box and shield removed;
and
Fig. 4, is a sectional elevation of one of the lawns, on a larger scale.
In constructing the improved sifting machine, I arrange, within a suitable fram-
ing, a, a tier of three separate lawns or sieves, b, 61, 62, (hereinafter referred to as
"lawns") one over the other, or I may likewise arrange any convenient number or
series of such tiers arranged side by side within separate compartments of the frame
or one over another, (three such tiers side by side being represented on the accom-
panying drawings,) and at the back of the tier or of each tier of three lawns or of
each laterally adjacent series of tiers of lawns, I arrange a driving shaft, c, carried
by bearings, a', projecting from the machine frame and provided for each tier of
three lawns with an excentric, c¹, common to such opposite tier, and by means of
which the lawns, b, 61, 62, of such tier are respectively and simultaneously actuated.
This I effect by connecting an excentric strap, c², (actuated by said excentric) with
the respective lawns of the tier by flexible connections, c³, c², as regards the upper
and lower lawns, b, 2, of the tier, and by a rigid connection, c', as regards the
middle lawn, 61, of the tier, opposite which latter the shaft, c, and excentric, c¹, are
arranged, the flexible connections to the upper and lower lawns being deflected by
guiding pulleys, c, so as to effect a pulling action on such lawns in the one direc-
tion, the return motion of such lawns being effected by springs, c', attached to the
machine frame and which tend to keep the flexible connections tant; while both
motions of the middle lawn, b', are effected by the connection, c³, from the excentric.
The middle lawn may, however, be actuated by a flexible connection, c', and by a
returning spring, in like manner to the other lawns of the tier.
The lawns are suspended with a corresponding inclination from the machine-
frame by flexible connections, b³, which permit of their being freely oscillated by
the means described, and they are respectively situated above a tier of trays, d, d¹, d²,
having a corresponding inclination but opposite to that of the lawns, and into which
the sifted material falls, and from the lower end of each of which it escapes through
apertures, d³, to the upper end of the next lower and finer lawn, the bottom tray, d
delivering the slip in a properly finished condition, without needing further sifting
treatment, into a convenient receptacle, e, and the top sieve receiving its supply
from a top tray f, to which the material to be treated is directly supplied.
In the lower end of each sieve is made a slot, 64, through which the coarser parts
(termed the "knottings") of the material, which are too coarse to pass through the
lawn, pass, delivering onto a projecting flange, 66, from which the knottings fall
into a box, g, at the foot of the machine, the front of which is protected by a
splashboard, g².
h, and h¹, are fast and loose pulleys, and i, is a flywheel.

page_text: The improved combination of means for actuating the lawns may also be applied
with equal advantage to the actuation of circular lawns, as well as those of a
rectangular formation as represented.
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 sifting machines of the nature above indicated:
1. The arrangement of the lawns in tiers of three and the operation thereof from
a common excentric by deflected flexible connections and springs as regards the
outer lawns and by a rigid connection as regards the middle lawn, as set forth.
2. The arrangement of the lawns in tiers of three and the operation thereof from
a common excentric by flexible connections and springs, as set forth.
Dated bтв отви шу от шву голо
DAY, DAVIES & HUNT,
Chartered Patent Agents, 321, High Holborn, London, W.C.,
Agents for the Applicant.