IMPROVEMENTS IN MACHINERY OR APPARATUS FOR TREATING OR PREPARING MEAL."
Year: 1876

page_text: LETTERS PATENT to Thomas Nightingale Palmer, of Lansdowne Road, Dalston,
in the County of Middlesex, for the Invention of IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR TREATING OR PREPARING MEAL." A com-
munication from abroad by Friedrich Wegmann, of Naples, in the Kingdom of
Italy.
Sealed the 11th May 1877, and dated the 25th November 1876.
PROVISIONAL SPECIFICATION left by the said Thomas Nightingale Palmer
at the Office of the Commissioners of Patents on the 25th November 1876.
THOMAS NIGHTINGALE PALMER, of Lansdowne Road, Dalston, in the County of
Middlesex. IMPROVEMENTS IN MACHINERY OR APPARATUS FOR TREATING OR
PREPARING MEAL." A communication.
The said Invention relates to improvements in the machine for which Letters
Patent have been granted to me bearing date the Sixth day of March, A.D. 187+,
No. 823.
The object of the said improvements is to render the said machine suitable for
reducing the finest semolina, middlings, or sharps into flour, superseding the
ordinary millstones, effecting a saving of motive power, and at the same time
producing flour of a superior quality to that produced by the means heretofore
employed.
The said improvements consist in the use of porcelain rollers combined with
means for imparting to the said rollers differential speed.
As described in the Specification of my former Patent above referred to, the meal
is fed into the hopper, from whence it passes through adjustable slides and is fed by
feeding rollers to the grinding rollers. The feeding rollers are, by preference, of
porcelain, but they may be of wood, iron, or other suitable material. The grinding
rollers are arranged in pairs, one roller of each pair being carried in fixed bearings,
and the other roller being carried by adjustable bearings connected with levers, the
said levers being operated upon by adjustable springs, by means of which the
pressure on the rollers is regulated as described. Or the necessary pressure may be
produced by weights instead of by the said adjustable springs.
Motion is imparted to the machine by a driving pulley on the shaft of one of the
fixed rollers. The said shaft carries a pinion which drives another pinion of the
Duin 177

page_text: same diameter on the shaft of the other fixed roller imparting like speed to the said
roller. Two other pinions are keyed on the shafts of the said fixed rollers, the
diameter of the said pinions being greater or less than that of the said rollers.
The shafts of the adjustable rollers carry pinions which work into the pinions on
the shafts of the fixed rollers, and as the diameter of these two pairs of pinions varies,
a differential speed is imparted to the rollers. A series of pinions communicate
motion to the feeding rollers.
I do not confine myself to the above described arrangement of the rollers or means
of producing the differential speed, as the same may be varied without departing
from the spirit of my Invention. Thus, I may employ two sets of grinding rollers,
one set being arranged above the other, passing the meal twice through the rolling
action, or I may arrange two adjustable rollers above cach fixed roller.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Thomas Nightingale Palmer in the Great Seal Patent Office on the
19th May 1877.
THOMAS NIGHTINGALE PALMER, of Lansdowne Road, Dalston, in the County of
Middlesex. "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR TREATING OR
PREPARING MEAL."
My Invention relates to improvements in the machine for which Letters Patent
have been granted to me bearing date the Sixth day of March, A.D. 1874, No. 823.
The object of the said improvements is to render the said machine suitable for
reducing the finest semolina, middlings, or sharps into flour, superseding the
ordinary millstones, effecting a saving of motive power, and at the same time
producing flour of superior quality to that produced by the means heretofore
employed.
The said improvements consist in the use of porcelain rollers combined with
means for imparting to the said rollers a differential speed.
The
As described in the Specifiation of my Patent above referred to, the meal is fed
into the hopper, from whence it passes through adjustable slides and is fed by
feeding rollers a to the grinding rollers b. The feeding rollers a are, by preference,
of porcelain, but they may be of wood, iron, or other suitable substance.
grinding rollers b are arranged in pairs, one roller of each pair being mounted in fixed
bearings, and the other roller being carried by adjustable bearings connected with
levers, the said levers being operated upon by adjustable springs by means of which
the pressure on the rollers b is regulated as desired. Or the necessary pressure
may be produced by weights instead of by the said adjustable springs.
Motion is imparted to the machine by the driving pulley e on the shaft of one of
the fixed rollers. The said shaft carries a pinion d which drives another pinion e of
the same diameter on the shaft of the other fixed roller, imparting like speed to the
said roller. Two other pinions ƒ and g are keyed on the shafts of the said fixed
rollers, the diameter of the said pinions ƒ and g being greater or less than that of
the said rollers. The shafts of the adjustable rollers carry pinions and i which
work into the pinions fand g on the shafts of the fixed rollers, and as the diameter
of these two pairs of pinions varies, a differential speed is imparted to the rollers b.
A series of pinions communicate motion to the feeding rollers.
I do not confine myself to the above described arrangement of the rollers or
means of producing the differential speed, as the same may be varied without
departing from the spirit of my Invention. Thus, 1 may employ two sets of
grinding rollers, one set being arranged above the other, passing the meal twice
through the rolling action, or I may arrange two adjustable rollers above each fixed
roller, or instead of using pinions I may produce the differential speed by means of
friction wheels or chain wheels.

page_text: Having thus fully described the said Invention as communicated to me by my
foreign correspondent, and shown how the same may be conveniently and
advantageously carried into practice, I claim, the combination in a machine for
preparing meal of porcelain grinding rollers with means for imparting to the said
rollers differential speed.
In witness whereof, I, the said Thomas Nightingale Palmer, have hereunto
set my hand and seal, this Fourteenth day of May, in the year of our
Lord One thousand eight hundred and seventy-seven.
THO. N. PALMER. (LS.)