IMPROVEMENTS IN AND APPLICABLE TO BOLTERS OR BOLTING MACHINES USED IN THE MANUFACTURE OF FLOUR
Year: 1880

page_text: LETTERS PATENT to John Griffiths, of Weobley, in the County of Hereford,
for an Invention of "IMPROVEMENTS IN AND APPLICABLE TO BOLTERS OR
BOLTING MACHINES USED IN THE MANUFACTURE OF FLOUR."
PROVISIONAL SPECIFICATION left by the said John Griffiths at the Office
of the Commissioners of Patents on the 17th March 1880.
"IMPROVEMENTS IN
JOHN GRIFFITHS, of Weobley, in the County of Hereford.
AND APPLICABLE TO BOLTERS OR BOLTING MACHINES USED IN THE MANUFACTURE
OF FLOUR."
The object of my Invention is to provide means whereby the middlings delivered
by the bolter or bolting machine may be purified by a current of air produced by
the rotatory motion of the reel.
•
For this purpose I construct an air shaft leading from the tail of the reel to a
." stive" room, or to any other suitable place. The current of air produced by the
rotatory motion of the reel passes up this shaft and carries with it the dust and
stive, leaving the purified middlings deposited below.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Griffiths in the Great Seal Patent Office on the 15th
September 1880.
"IMPROVEMENTS IN
JOHN GRIFFITHS, of Weobley, in the County of Hereford.
AND APPLICABLE TO BOLTERS OR BOLTING MACHINES USED IN THE MANUFACTURE
OF FLOUR."
The object of my Invention is to provide means whereby the middlings
delivered by the bolter or bolting machine may be purified by a current of air
produced by the rotatory motion of the reel.
For this purpose I construct an air shaft leading from the tail of the reel to a
"stive" room, or to any other suitable place. The current of air produced by the
rotatory motion of the reel passes up this shaft and carries with it the dust and
'stive," leaving the purified middlings deposited below.
"
Hitherto bolters or bolting machines have been used for dusting the middlings
or taking out the small portion of flour remaining in them after they have been
passed through other machines used in flour dressing, or, as it is termed by millers,
cleaning up offals," by my Invention the bolting machine, in addition to per-
forming this operation, is made to purify the middlings.
"
In middlings purifiers a current of air is produced or created by means of fans
or other blowing or exhausting apparatus. Now I have discovered that by the
rotatory motion of the reel of a bolter or bolting machine a sufficiently strong
current of air may be produced or created to carry away all the dust and stive
and purify the middlings without the use of a fan or other blowing or exhausting
apparatus, and the object of my Invention is to utilize the rotatory motion of the
reel for this purpose.
.
Having described the nature and object of my Invention I will now proceed
to show more particularly, by the aid of the accompanying Drawing, how I carry
the same into practical effect.
The Drawing shows a sectional elevation of a bolter or bolting machine. A is
the reel, upon which is placed a cloth, preferably that known as Blackmore's
patent bolting cloth. Rotary motion is imparted to the reel A by means of a
driving belt passing round the pulley B in the usual way. The middlings to be
bolted and purified are fed from the hopper C into the reel A in the ordinary
manner. D is one of the beaters, of which there are usually four or five, and
against which the cloth beats as the reel rotates, the cloth being fitted loosely on
the reel. In the casing or framing of the bolting machine I make a suitable hole,
as shewn at E in the Drawing, to admit air into the reel. I prefer to make this
hole about six inches by four inches, and to have it fitted with either a sliding or
a lifting door so that it may be opened or shut as required, or other suitable means
may be employed for regulating the admission of air to the reel.
I construct a suitable air shaft F leading from the tail end of the reel to the
"stive" room G. The rotatory motion of the reel A produces or creates a current
of air from the hole E through the reel and up the air shaft F. This current of
air carries with it up to the "stive" room G all the dust and stive which may be
mixed with the middlings, and the purified middlings fall by their own weight
through the spout H into any suitable receptacle.
My Invention may also be applied to bolters or bolting machines now in use at
a very small cost.
I wish it to be understood that in carrying my Invention into practical effect I
do not limit myself to the precise details herein described and illustrated, which

page_text: may be modified in various ways if necessary, but what I claim as novel, and
desire to have secured to me by the before-mentioned Letters Patent is, -
The use of the air shaft in combination with the reel of a bolter or bolting
machine, substantially as hereinbefore described, for the purpose of utilizing the
rotatory motion of the reel to create a current of air through the reel sufficient to
carry away the dust and stive without the use of a fan or other blowing or
exhausting apparatus.
In witness whereof, I, the said John Griffiths, have hereunto set my hand
and seal, this Eleventh day of September, in the year of our Lord One
thousand eight hundred and eighty.
JOHN GRIFFITHS. (LS.)