Improvements in Mills for Grinding Grain and other Substances.
Year: 1888

page_text: Date of Application, 8th Aug., 1888
Complete Specification Left, 6th May 1889-Accepted, 29th June. 1889
PROVISIONAL SPECIFICATION.
Improvements in Mills for Grinding Grain and other Substances.
I, THOMAS PRICE of 6 Gore Terrace, Swansea in the county of Glamorgan,
merchant, do hereby declare the nature of this invention to be as follows:-
This invention relates to mills for grinding grain and other substances. The grain
or other substance to be ground is first partially reduced in a small mill technically
termed a "kibbler" driven from the driving shaft of a vertical stone mill. From
the kibbler the partially reduced substance descends into a hopper and is fed
therefrom by a worm through the eye of the bedstone to the vertical inill.
The bedstone is carried in a pan, being socured therein by suitable bolts. Behind
the pan is a permanent back plate provided with facings which, when the bedstone
is in the proper position for grinding, bear against corresponding facings provided
on the back of the pan of the bedstone. The pan, with the stone therein, is, after
adjustment, secured in place. The pan, with the bedstone therein, is readily removed
for dressing and another pan and stone substituted therefor. As is usual, the runner
stone is also removable.
"
This invention consists further in a special "dress" imparted to the stones. In
a stone of 4 feet diameter the furrows are arranged in twelve series, "quarters
or "harps" each having four furrows. Of these, three furrows in each "harp"
run either into the eye or into the "master" furrow.
In mills constructed and arranged in accordance with this invention, the operation
of grinding is simplified and the rate thereof acceleratel.
Dated this 7th day of August 1888.
NICHOLAS WATTS,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Mills for Grinding Grain and other Substances.
1, THOMAS PRICE, of 6 Gore Terrace, Swansea, in the county of Glamorgan,
merchant, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
This invention relates to mills for grinding grain and the like.
The grain having been partially ground in a small mill termed a "kibbler" is fed
to the grinding stones of the mill proper by a worm passed through the eye of the
bed-stone which is carried in a pan in which it is retained by set pins. Behind the
pan is a permanent back plate fixed true and provided with facings and sockets so
that when the pan of the bedstone is bolted to the back plate the proper position for
grinding is ensured.
When the bed-stone requires dressing, the pan in which it is carried is readily
removed. As is usual, the runner stone is also removable.
This arrangement enables two pairs of stones to be driven without additional gear
and in the samo space as one pair,
This invention consists, further, in an improved arrangement of the furrows in the
grinding stones, and known as the "dress."
39-
Referring to the accompanying drawings, Fig. 1 represents a side elevation and
Fig. 2 a vertical section of a mill constructed and arranged in accordance with this
invention.
The small mill or kibbler a, instead of being situated apart from the mill proper,

page_text: as hitherto, is placed in close connection therewith and is driven from the driving
shaft of the main mill.
The grain is partially ground in the kibbler and descends therefrom by the
hopper c to the worm d on the shaft b by which it is fed to the grinding stones e and f
of the mill.
The worin d is extended through. the eye of the bedstone e. The bedstone e is
carried in a pan g in which it is secured by set pins h. The pan g is secured to the
back plate i by bolts k.
The back plate i is accurately and truly fixed in place and is provided with
facings against which the facings of the pan y take a bearing, so that when the
pan and back plate are secured closely together the proper position of the stones for
grinding is ensured.
At such times as it may be necessary to remove the bedstone for dressing, or for
other purpose, the pan g containing it is readily removed taking the stone with it.
The runner stone fis, as is usual, also removable.
The arrangement admits of two pairs of stones being driven in the same space as
one pair and without the employment of additional gear.
The operation of grinding is accordingly, expedited and simplified.
The runner stone / is fitted with a socket f¹ bolted to it. In this socket is
inserted the conical gland.
At Fig. 3 is shown a face view of a mill-stone dressed in accordance with the
improved method of dressing in which this invention consists. The furrows are
arranged in twelve groups termed "quarters" or "harps." Each group consists of
a master or leading furrow, indicated by the lettor s, which runs into the eye of the
stone, two furrows tu leading into the master, and a short furrow having no
outlet.
"
This form of dress provides the largest possible number of cutting edges
consistent with retaining sufficient "land" or ungrooved surface for "softening
purposes and with furnishing a free exit for the finished material.
Having now particularly described and ascertained the nature of this inven
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a grain-grinding mill, providing a movable, adjustable pan such as for
g
containing the bedstone and having facings such as l¹ for bearing against the facings
of a back plate such as i, the pan and bedstone being together portable, as herein
before described.
2. The provision, through the centre of the bedstone of a grain-grinding mill, of
an eye or passage through which the grain, as it comes from the kibbler, is fed to
the mill by a worm such as d formed on the driving shaft b and rotated by suitable
gearing, substantially as above described.
3. In a grain-grinding mill, incorporating therewith the kibbler or small mill a
driven by intervening gearing from the shaft of the main mill, substantially as
described.
4. The combination of parts constituting the improved grain-grinding mill,
constructed arranged and operating substantially as hereinbefore described and
shown on Sheet 1 of the accompanying drawings.
5. The improved arrangement of dress for mill-stones shown at Fig. 3 of the
accompanying drawings, in which the furrows are arranged in "quarters" or
"harps" in each of which one-the master-farrow runs to the eye of the stone,
two furrows t, u run into the master, and one furrow having no outlet, as herein-
before set forth and for the purposes specified.
1
1000