IMPROVEMENTS IN GRINDING MILLS
Year: 1881

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and .
Company, Solicitors, of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for an Invention of "IMPROVEMENTS IN GRINDING MILLS."
A communication from abroad by Baptiste Touya, of Tarbes, in the Republic
of France.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 15th January 1881.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVE-
MENTS IN GRINDING MILLS." A communication from abroad by Baptiste Touya, of
Tarbes, in the Republic of France.
This Invention relates to apparatus for grinding or breaking cereals, minerals,
and bark.
This apparatus consists chiefly of two horizontal discs, provided on their contiguous
faces with vertical pins, preferably of cast steel, said pins being so arranged that
one circumferential row of the upper disc projects and passes between two
circumferential rows of the lower disc, or vice-versa. One of the two discs,
preferably the lower one, is secured to a vertical shaft and revolves with the same,
while the other disc remains stationary.
The frame of the machine consists of a tripod connected with the fixed disc, and
forming a bearing for the vertical driving shaft, and the whole frame is secured to
a base plate by bolts and stays.
A cylindrical casing of sheet metal surrounds the two discs to prevent the
escape of the ground product, except through a lateral outlet channel. The inlet
of the raw material is at the centre, and may be effected through a hopper, and the
vertical driving shaft may be set in motion by a belt or a rope.
'
The vertical distance between the two discs is made variable by providing the
driving shaft with a vertically adjustable step bearing secured to the base plate.
The whole apparatus may be mounted on a stand, which is also provided with a
crank or hand wheel and intermediate gearing for turning the driving shaft by
means of a rope or belt.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddán in the Great Seal Patent Office on the
7th July 1881.
:
IMPROVE 5
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67; Strand, in the City of Westminster, Civil Engineer.
MENTS IN GRINDING MILLS." A communication from abroad by Baptiste Touya,
of Tarbes, in the Republic of France.
a
.
This Invention relates to apparatus for grinding or breaking cereals, minerals,
and bark. This apparatus consists chiefly of two horizontal discs, provided on their
contiguous faces with vertical pins, preferably of cast steel, said pins being so arranged 10
that one circumferential row of the upper disc projects and passes between two
circumferential rows of the lower disc, or vice-versa. One of the two discs, preferably
the lower one, is secured to a vertical shaft and revolves with the same, while the.
other disc remains stationary. The frame of the machine consists of a tripod
connected with the fixed disc, and forming a bearing for the vertical driving shaft, 15
and the whole frame is secured to a baseplate by bolts and stays. A cylindrical
casing of sheet metal surrounds the two discs, to prevent the escape of the
ground product, except through a lateral outlet channel. The inlet of the raw
material is at the centre, and may be effected through a hopper, and the vertical.
driving shaft may be set in motion by a belt or a rope. The vertical distance, 20
between the two dises is made variable by providing the driving shaft with i
vertically adjustable step bearing secured to, the base plate. The whole apparatus
may be mounted on a stand, which is also provided with a crank or hand wheel,
and intermediate gearing for turning the driving shaft by means of a rope or belt.
The accompanying Drawing will serve to illustrate a practical mode of performing 25
the Invention; A is the lower horizontal disc, made preferably of steel, provided..
on its upper face with vertical pins, preferably of cast steel, which are so arranged
that one circumferential row of discs on the upper horizontal disc B projects and
passes between two rows of pins in the before mentioned disc A, or they may be
arranged so that the pins on the lower disc project and pass between two rows, of 30
pins on the upper disc B. One of these two discs, preferably the lower one A, is
secured to a vertical shaft E, E, and revolves with the same, while the other disc
remains stationary. The discs may be made of a size proportioned to the required
production of the apparatus, and I prefer a space of, say, 4 millimetres between the
pins of discs A and B. The frame of the machine consists of a tripod D, D¹, made 3
of bronze or other suitable material, connected with the fixed disc by means of the
bolts T, T, forming a bearing for the vertical driving shaft E and causing it to
remain perpendicular, and on the same centre with inlet R, when the cereals or
other matters are introduced for grinding, and the whole frame is secured to a
baseplate F by bolts H, H, and stays.
.
A cylindrical casing of sheet metal X, X, surrounds the two discs A and B, to
prevent the escape of the ground product, except through the lateral outlet
chamber, whence its passage is facilitated by the current of air caused by the
rotation of the moveable disc. The vertical distance between the two discs A and B,
is made variable by providing the driving shaft E with, a vertically adjustable 4
step bearing, K, which is secured to the baseplate F by means of the bolts Y, Y;
and is actuated by means of the screw O.
:
Figure 1 is a side view of the machine mounted on a stand R, R¹, and
showing a method of driving by main force.; P being the main gearing, to which is
attached a handle P transmitting its movement upon the double gearing N, and 5
the latter communicating it to a pinion U keyed on a shaft with the grooved fly-
wheel M, and sustained by two supports L, and the power is then transmitted along
the belt or rope F to the pulley e or the main shaft E, E¹.
...

page_text: Figure, 2 is a side view of the grinding mill; Fig. 3 is a plan view of discs A
and B; Fig. 4 is a detached view of outlet channel z; and Fig. 5 represents a side
view of the machine with arrangements suitable to facilitate the flow of the raw
material to be ground. C is the funnel inlet and D. the drum, over which passes
the band which actuates shaft E.
I claim,
Firstly. The application of a revolving disc furnished with circumferentially
arranged rows of projecting pins, acting in combination with a stationary disc
likewise so provided, for grinding cereals and for disintegrating or breaking
10 materials, substantially as herein described, illustrated, and set forth.
"
Secondly. The arrangement of the various parts of the apparatus and frame,
substantially as herein described, illustrated, and set forth.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this First day of July, A.D. 1881.