Improvements in Roller Grinding Mills.
Year: 1894

page_text: Date of Application, 1st May, 1894
Complete Specification Left, 28th Feb., 1895-Accepted, 1st May, 1895
PROVISIONAL SPECIFICATION.
Improvements in Roller Grinding Mills.
A communication by ALONZO DON BEARY, of Helena, in the County of Lewis
and Clarke, and State of Montana, United States of America, Gentleman.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street,
Ianchester both in the County of Lancaster and 323 High Holborn, in the County
Middlesex Civil Engineer, do hereby declare the nature of this invention to be
as follows:
This invention has for its object to construct and provide a roller grinding mill
especially adapted for domestic uses.
To this end, it is proposed to make the frame or casing of the mill in sections or
parts, composing the stand, and an intermediate casing resting thereon, and a top
or cover supporting the hopper. Bearings for the rollers are formed in the case-
sections at their meeting edges, and upper and lower sets of grinding rollers are
mounted in the bearings and one of the lower rollers made adjustable by special
aneans or devices, and all are provided with gearings to turn them. The adjusting
device for the adjustable roller will be hung in the section of the casing and the
position thereof be determined by adjusting screws let through the casing and
bearing on the necks of the roller. The hopper is also of particular construction,
having inclined planes to feed or direct the material to the rollers, and the inter-
mediate casing has a cross bar to act as a brace and at the same time serve as a
spreader to the material in distributing it over the inner or lower set of rollers.
Dated this 30th day of April 1894.
A communication by ALONZO DON BEARY, of Helena, in the County of Lewis
and Clarke, and State of Montana, United States of America, Gentleman.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6 Bank Street,
Manchester, both in the County of Lancaster, and 323 High Holborn in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The invention has relation to improvements in mills for grinding coffee and
spices; and the object is to simplify and improve existing grinding mills of the
kind and for the purposes mentioned, by providing a mill simple in construction,
efficient in operation, durable in use, and cheap in price.

page_text: arrangement.
Fig. 7 is a detail of the means for adjusting the lower grinding roller.
Fig. 8 is a side view showing the gearing, the fly-wheel being broken away to
permit the proper illustration.
Fig. 9 is a central vertical section on the line y-y of Fig. 2 taken through the
whole mill.
A designates the stand or support of the mill, made of cast metal and consisting
of legs 1, at the corners connected by intermediate cross-pieces 2, and flat base-
pieces 3, having screw-notches a, in the edges to take fastening-screws or nails,
whereby the mill may be held tight and firm to a table or other surface. At the
top of the support is a rectangular casing or open boxing B, the upper edge of
which is planed off sinooth to make a close fit or connection with the bottom edge
of the intermediate case. In the casing B are formed journal-bearings or boxes 4, 5,
in which are mounted and sustained the journals of the lower set of grinding-rollers.
The bearings 4, are somewhat elongated, so as to give the grinding-roller therein
mounted, room to be adjusted in its seat in the bearings.
In the inner-faces of the end-pieces or walls of the casing B are formed recesses
or ways 6, located at the corners, as indicated, and in these recesses is supported
the adjusting-brackets C. This bracket C consists of end pieces 7, 8, projected at
their upper ends above the bearings 4, so as to bear against the journals of the
roller, which end pieces are connected by an inclined cross-piece 9, serving to
direct droppings from the roller inwardly, if such occur. By making the inclined
cross-piece 9 integral with the pieces 7 and 8 the relative position of the incline is
always retained and maintained in respect to the roiler above and adjacent to it ;
so that the material is always delivered by the incline to the same distance under
the roller. The lower ends of the end pieces 7, 8, are mounted on a bar 10, the
ends of which are fixed in the side pieces of the casing B.
On the sides of the casing B are formed ears 11, 12, provided with bolt-holes to
take the bolts which hold the respective parts of the whole casing together. The
car 11 has an enlargement at its base through which is a threaded-hole 14, in which
is a screw 15, the inner end of which bears against the face of the cross-piece of
the bracket C, as shown, whereby the bracket is moved against the journals of the
roller in the elongated bearings and thus regulates that roller in its relation to the
other roller to grind coarser or finer. To support the end pieces 7, 8, against undue
strain outward, and to prevent the bracket from warp or other displacement,
set-screws 16, 17, are let through the wall of the casing adjacent to the ends of
the bracket. .
D designates the intermediate casing serving to couple the lower casing and the
hopper part together. This casing is rectangular in cross-section and fits with the
lower edge tight and snug on the lower casing. It is formed with recesses 18, 19,
in its lower edge, constituting caps for the journals of the lower set of rollers, and
correspond in shape to the bearings over which they fit and set, the one being
elongated as shown, to give the journal of the adjustable roller room to be moved
as heretofore stated. In the upper end of this casing D are formed journal-
bearings 20, 21, in which are mounted the upper set of rollers, and on the sides are
ears 22, 23, having holt-holes registering with those in the ears of the casing below
1,..

page_text: to take the fastening-bolts. In the inner sides of the casing D are formed inwardly
aud downwardly inclined planes 24, 25, the lower edges of which reach substantially
to the middle line of the roller, as shown, and serve as a hopper for the lower set of
rollers and to direct the material toward the meeting-faces of the rollers. Centrally
across the casing D is fixed a bar 25*, in alignment with the inner edges or faces
of the lower set of the rollers, and serving to brace the casing and at the same time
acting as a spreader to receive the material from the upper set of rollers and
distribute it evenly over the lower set.
E designates the hopper, having formed integral therewith at its base, a cover 26,
fitting on the top of the casing D, having ears 27, 28, with bolt-holes registering
with those in the casing below, and also formed with recesses 29, 30, constituting
caps for the journals of the upper set of rollers substantially as shown in the
drawings.
The hopper, casing D, and the lower casing C are held in position together by
means of the bolts 31, 32, projected through the respective cars of the parts, and
secured by thumb-nuts on their upper ends, as shown.
Journaled in the hearing-boxes 4, 5, is the lower set of rollers d, e, which
may be checked fine on their faces or corrugated finely so as to present surfaces
suitable for grinding finely whatever material may be subjected to their action.
On the roller d is secured a pinion f, meshing with a pinion y, on the neck of the
roller " the pinion g being smaller than the pinion to give the rollers different
speed in revolution, and increase their grinding or pulverizing capacity, as is well
known. The pinion g has its shaft lengthened sufficiently to afford connection with
the driving-wheel. In bearings in the upper casing is journaled the roller h,
on one end of which is detachably secured the handle, by which the mill is
operated, and on the opposite or other end is a piniou, and the large pinion k, the
former of which meshes with the pinion on the other top roller, and the latter of
which meshes with the pinion g on the lower roller e, as shown. The upper set of
rollers are given different speed of rotation by making the pinions of different sizes.
The neck of the roller e is extended or lengthened as shown, and carries the fly-
wheel m, whereby the force is kept regulated as in such instances. The upper set
of rollers have their faces pyramidally checked or corrugated, to grind coarser than
the lower set, so that the material is delivered to the action of the lower set
partly broken and fully prepared for their action. The corrugations of the
respective rollers are not particularly shown, because such formations are common
and well known.
The casing and the mechanism are assembled by placing the lower set of rollers
in the bearings in the top of the casing of the support, then placing the intermediate
casing in position over them, and then putting the hopper with the cover at the
bottom, the upper set of rollers having been laid in their boxes, in position. The
fly-wheel and the handle can be put on their supports as shown, and the mill
is ready for operation. The degree of pulverisation is effected by the adjustment
of the adjusting screw and the bracket bearing against the adjustable roller of the
lower set.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondent. I declare that what I claim is-
1. The combination of the stand formed with roller-bearings in its upper edge
one set of said bearings being elongated, an adjusting-bracket fulcrumed in the top
of said stand having end pieces to bear against a roller in the elongated bearings,
said end pieces being connected by an inclined cross-piece 9, a screw to adjust the
said bracket, the middle casing formed with cap-bearings in the under edge,
inclined inner sides and a central cross-bar, and bearings in its upper edge, and the
hopper having a botton piece constituting a cover for the middle casing having
cap-bearings, all as and for the purpose specified.
2. The combination with the stand and the upper cover sustaining the hopper, of

page_text: the middle casing D, formed with bearings in its lower and upper ends, downward
and inward inclined side pieces and a central cross-bar, substantially as and for the
purposes specified.
3. The coffee-grinder herein described, comprising a suitable stand having
bearing-boxes formed in its upper edge, one of which is elongated, and exterior
vertical recesses b at the corners, grinding-rollers mounted in said bearings, an
adjusting-bracket fulcrumed in the vertical recesses in the side of the casing
having end pieces to bear against the necks of the roller in the elongated bearings,
and connected by an inclined cross-piece, a screw to adjust the bracket, a middle
casing having inward inclined sides the lower edges of which set over the lower set
of rollers and bearings in the upper edge of the casing, a central cross-bar 25,
an upper set of grinding-rollers in such bearings, a cover carrying a hopper and
formed with bearing-caps to set over the necks of the rollers, fastening-bolts to
hold the parts together, and gears on the rollers to rotate them, as specified.
Dated this 27th day of Fahrry 1805
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London, Patent Agents.