Improvements in Grinding Mills with Bottom Runner.
Year: 1889

page_text: Date of Application, 11th Mar., 1889
Complete Specification Left, 6th Dec., 1889-Accepted, 11th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Grinding Mills with Bottom Runner.
[, OTTO POLYSIUS, Machine-manufacturer, residing at Dessau, Duchy of Anhalt-
Dessau, German Empire, do hereby declare the nature of this invention to be as
follows:-
My invention relates to grinding-mills comprising two millstones, the lower one
whereof is the runner, and the improvements consist in the means for securing and
adjusting the upper stone, and in the construction of the top bearing for the spindle
of the runner or lower stone.
The upper stone is provided with an iron hoop and to this hoop are connected lugs.
These lugs form nuts, through which vertical screws are passed, the said screws being
so mounted in the upper part of the casing of the stones as that they may be rotated
without shifting lengthwise. Besides this, the casing has on the inside vertical ribs
forming recesses, in which the said lugs engage in view of more certainly preventing
a rotation of the stone.
The top bearing for the spindle of the lower stone, or runner, consists in a sleeve
with conical boring, the larger diameter whereof is at the bottom, a number of sectional
brasses fitting into the said sleeve, and a cap screwed on the bottom end of the latter,
the said cap bearing against the brasses, so that, when it is screwed upward, it will.
push the brasses farther into the conical sleeve and thereby press them against the
spindle. A rotation of the brasses is prevented by means of feathers engaging.
with grooves that are cut into the brasses and the sleeve, or by other suitable
contrivances.
Dated the 11th love of March 1830
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Grinding Mills with Bottom Runner.
I, OTTO POLYSIUS, Machine Manufacturer, residing at Dessau, Duchy of Anhalt,
Dessau German Empire, 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 :-
My invention relates to grinding-mills comprising two millstones, the lower one
whereof is the runner, and the improvements consist in the means for securing and
adjusting the upper stone and in the construction of the top bearing for the spindle
of the runner or lower stone.
In the annexed drawing fig. 1 is a sectional elevation of a mill carried out
according to my invention. Fig. 2 is a section on line 1, 2, and fig. a section on
line 4. 5. a is the upper stone which is stationary, and the lower stone or runner.
c and d are the two parts of the stone-casing. These are secured together by means
of bolts e and springs, so that the upper part c, to which the stone a is attached,
way rise a little if any hard body should happen to pass in between the stones.
the spindle carrying the runner, the latter being mounted on the spindle through
the medium of a plate. The driving gear ands the gear for adjusting the runner
will be understood from the drawing without description, besides they do not present
any novel features.
y is
The means for securing and adjusting the upper stone are as follows. Around the
said stone is shrunk an iron hoop i, and to this hoop are fixed or otherwise attached
lugs, such as j, preferably in the number of three, one of which only is shown. As

page_text: represented by the drawing the lug is formed with a round stem, inserted into a
hole drilled through the hoop into a plate placed beneath the latter in view of giving
.a longer bearing surface to the said stem. Each of the lugs j forms a nut in which
a vertical screw k works, the upper end whereof is passed through the top of the
casing c, and secured therein in such manner, for instance by means of two collars,
one of which is detachable, that the screw may be rotated without shifting length-
wise. For turning the screw it is made square at the top. In order to guide the
lugs vertically and to prevent with certainty the stone a from shifting, the
casing has on the inside for each lug two ribs forming a groove in which the lug
engages.
The top bearing for the spindle y consists in a sleeve m with conical bore, the
larger diameter whereof is at the bottom, a number of sectional brasses fitting
into the said sleeve, and a screw-cap working on threads at the lower end of the
latter, the said cap bearing against the ends of the brasses so that, when it is
.screwed upward, it will push the brasses n farther into the conical sleeve and thereby
press them against the spindle g. A rotation of the brasses is prevented by means of
feathers p engaging in grooves that are cut into the brasses and the sleeve.
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 grinding-mill comprising a stationary upper stone a, a bottom runner b
and a stone-casing ed, the combination, with the stone a and the casing-part c, of
devices for adjusting the stone vertically and preventing it from shifting, each of the
said devices consisting in a lug i, forming a nut and attached to the stone, or
inserted with a stem into a hoop surrounding the same, and a screw working in
the lug and connected to the casing so as to be capable of rotating therein but
without moving longitudinally, the casing-part c being provided with ribs that form
guides for the lug, substantially as described.
2. In a grinding-mill having a bottom runner band spindle y, the combination,
with the said spindle, of a bearing consisting in a sleeve m with conical bore, the
sectional brasses n fitting in said sleeve, feathers p engaging in grooves cut into
the sleeve and the brasses, and a cap screwed on the sleeve, substantially as
.specified.
Dated this d
uny of Ducemen LAAN
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.