IMPROVEMENTS IN MIDDLINGS PURIFIERS ALSO APPLICABLE TO SOME OTHER SEPARATING MACHINES
Year: 1884

page_text: I RALPH HOWARTH of 24 Manchester Rd Rochdale in the County of Lancaster
Corn Miller do hereby declare the nature of my Invention for IMPROVEMENTS IN
MIDDLINGS PURIFIERS ALSO APPLICABLE TO SOME OTHER SEPARATING MACHINES
to be as follows:-
"
My invention relates principally to improvements in middlings purifiers, also
applicable to some other separating machines, such as centrifugal flour, ordinary
silk reel and wire dressing machines; and has in the first place for its object to
give a ready way of covering the sieve frame of a purifier, with silk or other
bolting cloth, in such a manner that each separate sheet can be fixed, tightened, or
changed without disturbing any of the other sheets, and leave at the same time a
sufficiently clear course for a brush to travel underneath the whole of the bolting
cloth, to keep it clean. To this end I divide the ordinary sieve frame into
divisions, by fixing a suitable number of slotted metal cross strips, the ends of
which, are suitably fastened and sunk into the sieve frame. A piece of bolting
cloth, corresponding in length and width, to the size of the said divisions, has a
band or tape stitched to each side, and is provided with hooks which hook into the
slots of the said metal strips. At each end of the said bolting cloth, a wooden
strip is suitably fixed thereto, which is in thickness about the same as the sieve
frame.
The wooden strip is connected to the frame inside, by means of bolts and wing
nuts, by means of which the bolting cloth can be stretched out to any desired degree
of tension, the slotted metal cross strips permitting the hooks to slide, thus
allowing a uniform expansion and tension of the bolting cloth. When the bolting
cloth is fixed in such a manner, the said slotted strips are covered with a piece of
bolting cloth, in order to prevent the middlings from dropping through the said
Blots.
My invention has in the second place for its object, to provide ready means for
delivering and collecting the middlings, which have passed through a certain part
of the sieve, to conveyors, in such a manner, that the middlings may be conveyed
and collected separately, according to their quality. To this end I arrange below
the gathering board of a middlings purifier, two conveyors in a box, side by side,
FD

page_text: which may be archimedian screws or other suitable appliances, which will effect a
delivery of the middlings but being kept apart by a partition. Above each
conveyor, a longitudinal opening is formed in each of the gathering boards, which I
provide with a suitable number of slide doors. The saide slide doors work between
the gathering board and the said partition, and at the same incline as the gathering
board is fixed and are provided at their bottom part with a metal strip, which
covers the top of the said partition. One end of such slide door, being likewise
provided with a metal strip, fixed in such a manner, as to cover the end of the
adjacent slide door. Both of these strips at the bottom and at the end, are let into
the slide door to the depth of their thickness, thus forming a perfect joint and
leaving a level surface.
Dated thin 10th a
AT 1001
RALPH HOWARTH,
Per Bosshardt & Grant,

page_text: I RALPH HOWARTH, of 24 Manchester Rd Rochdale, in the County of Lancaster,
Corn Miller, do hereby declare the nature of my invention for "IMPROVEMENTS IN
MIDDLINGS PURIFIERS ALSO APPLICABLE TO SOME OTHER SEPARATING MACHINES,"
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
My invention relates principally to improvements in middlings purifiers, part of
which is also applicable to some other separating machines such as centrifugal
flows, ordinary silk reel and brush dressing machines and has in the first place for
its object to give a ready way of covering the sieve frame of a purifier with silk or
other bolting cloth in such a manner that each separate sheet can be fixed tightened
or changed without disturbing any of the other sheets and. leave at the same time
a sufficiently clear course for a brush to travel underneath the whole of the bolting
cloth to keep it clean.
My invention has in the second place for its object, to provide.ready means for
delivering and collecting the middlings which have passed through a certain part
of the sieve to conveyors in such a manner that the middlings may be conveyed
and collected separately according to their quality.
And in order that my invention may be better understood I have caused to be
appended hereunto onc sheet of drawings marked with letters of reference corre-
sponding letters indicating like parts in the various figures.
Fig 1 on the said drawing represents a longitudinal section, Fig 2 a plan and
Fig 3 a cross section of my improved sieve frame for purifiers or other separating
machines.
Figs 4 and 5 are cross section and plan enlarged respectively of a part of the
sieve. Fig 6 is a cross section of the gathering boards and means for collecting and
separating the middlings in a purifier.
Fig 7 is a side view thereof.
In carrying out and referring to the first part of my invention, see Figs 1, 2, 3,
4 and 5, I divide the ordinary sieve frame a into divisions by fixing a suitable
number of slotted metal cross strips b the ends of which are suitably fastened and
sunk into the sieve-frame a. A piece of bolting cloth c corresponding in length
and width to the size of the said divisions has a band or tape d, stitched to each
side and end each side being provided with hooks e which hook into the slots of
the said metal strips, at each end of the said bolting cloth a wooden strip f is
suitably fixed thereto which is in thickness about the same as the sieve frame.
The wooden strip f is connected to the frame inside by means of bolts g and
wing nuts h by means of which the bolting cloth can be stretched to any desired
degree of tension the slotted metal cross strips permitting the hooks to slide,
thus allowing a uniform expansion and tension of the bolting cloth. When the
bolting cloth is fixed in such a manner the said slotted strips are covered with a
piece of bolting cloth in order to prevent the middlings from dropping through the
said slots.
Referring to the second part of my invention see Figs 6 and 7 I arrange below
the gathering boards of a middlings purifier two conveyors k in a box l side by
side which may be archimedian screws or other suitable appliances which will effect
a delivery of the middlings, but being kept apart by a partition m. Above each
conveyor a longitudinal opening n is formed in each of the gathering boards i
which I provide with a suitable number of sliding doors o. The said sliding doors
work between the gathering boards i and the said partition m at the same incline

page_text: as the gathering boards are fixed and are provided at their bottom part with
a metal strip p which covers the top of the said partition. One end of such slide
doors being like-wise provided with a metal strip q fixed in such a manner as to
cover the end of the adjacent slide doors. Both of the strips at the bottom and at
the end are let into the slide door forming a perfect joint and leaving a level
surface.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:
CLAIMS.
In a middlings purifier or other separating machine :-
First Dividing the sieve frame a into divisions by means of fixing slotted metal
cross strips b, the bolting cloth being made in parts to suit each division and
provided on their sides with hooks e and on their ends with strips of wood, such
hooks engaging the slotted metal strips b and the wooden strips fitting inside the
sieve frame being drawn towards the latter by means of the bolts and wing nuts h
substantially as described and illustrated by the annexed drawing for the purpose
set forth.
Second The use and employment of two conveyors or archimedian screws
below the gathering boards working in a box side by side but being kept apart
by means of the partition m, on which work a suitable number of sliding doors o
in a slot formed longitudinally in each gathering board substantially as described
and illustrated by the annexed drawing for the purpose set forth.
Dated this 18th day of December. A.D. 1884.
Pro RALPH HOWARTH,
Bosshardt & Grant.