Improvements in Rollers and Edge-runners for Grinding.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Rollers and Edge-runners for Grinding.
I, ROBERT WALKER of Netherby near West Thurrock Essex, Millstone Builder, 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 improvements in rollers and edge runners for grinding
substances of various kind such as pigments, paint cement, and the like, and consists
in the use of buhr-stones as grinding surface which stones are fixed and arranged in
the manner hereinafter described. According to my invention, I form the periphery
or grinding surface of my improved roller, and edge runner of blocks of buhr-stone of
suitable size. These blocks are cut to form a flange near their lower part, against
which flange bear the upper curved ends of two iron plates surrounding any ordinary
stone or composition which forms a socle or support for the bahr or grinding stone
and fits at the top within the inequalities of the base of the latter.
These iron plates are bolted two by two through the ordinary stone or composition
aforesaid, leaving a space in the centre through which the roller shaft is secured in
any suitable manner. The adjoining buhr-stones are cut so as to fit together, and
thus form a firm and homogeneous grinding periphery.
In the accompanying drawings
Fig. 1 is half an elevation and half a section on line A B C D of Fig. 3 of my
improved roller.
Fig. 2 is a central vertical section thereof on line E F of Fig. 1.
Fig. 3 is an elevation at right angles to Fig. 1, shewing half grinding surface.
The buhr-stone blocks BB
are arranged contigeously as shown in Fig. 1,
and are cut to fit exactly one against the other, so as to form a solid, homogeneous
grinding periphery.
The centre part C is formed of ordinary stone or preferably composition, and may be
weighted in any desired manner, to obtain the same ponderousness as if the whole of
the roller was made of one solid bubr-stone. Fig. 2 shows the mode of fixing the
buhr-stones in position. The same are formed with flanges at ff and rest upon the
composition C which forms a pedestal or support thereof and the top of which fits into
the inequalities of the basis of the buhr-stone. Pairs of iron plates bent at their
upper and lower edges bear respectively with the latter upon the flanges ff, of the
grinding stone and against the underside of the composition. These plates are fixed
two by two by bolts bb. traversing the composition C and secured by the
A square opening A is formed for the shaft which is fixed therein
nuts n n
in any suitable manner.
As my improvements are capable of some modifications without departing from the
principle thereof, I do not restrict myself to materials or dimensions, or to the precise
form or placement of the several parts thereof.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
(1) The improved roller and edge runner consisting of a grinding surface or
periphery of buhr-stone blocks, resting upon a composite centre and fixed substantially
as described and shewn in the drawings.
Dated this 8th day of December 1890
RAYNER & CASSELL,
37, Chancery Lane, W.C., Agents for the Applicant.