Year: 1886

page_text: I JOHN ROBERT ALSING of 27 Leadenhall Street in the City of London Manu-
facturer do hereby declare my invention to be as follows:-
My improvement relates to triturating cylinders in which granulated substances
are introduced together with a quantity of pebbles or balls in a cylindrical drum,
and are reduced to an impalpable powder by the grinding action of the said balls
and of the material upon itself, due to the revolving of the said cylinders.
My present improvement, although feasible for similar mills of all sizes is more
especially adapted and intended for medium or smaller sizes in which a corre-
spondingly sinaller quantity is ground at a time.
The object of the invention is to provide a simple and compact construction
whereby the desirable lining or inner cylinder of porcelain, or such vitreous
material may be made whole, or substantially in one piece instead of being formed
of small slabs or blocks built within an outer cylinder in the manner of laying
bricks for arches as has heretofore been done; and also to obtain a strong and
durable construction which will better stand concussion and wear and, of course,
absolutely secure against the possibility of falling in of one or more slabs as would
sometimes happen in the old construction..
The invention will be hereinafter fully described reference being had to the
accompanying drawing in which fig. 1 represents an elevation of my improved
triturating cylinder. Figs. 2 and 3 are sections of the same.
A is the inner cylinder of porcelain or other vitreous material preferably
porcelain (for the purpose of grinding porcelain material).
The cylinder A may be made whole in one continuous piece of material moulded
in the manner of making pottery jars. Through the perifery of the cylinder is
formed an opening at a for charge and discharge of material.
B is the cover for the opening a and is kept in place by a screw b¹ threaded
through a cross-bar 6 whose ends are inserted in and retained by eye-screws or
perforated lugs c which are fastened or formed on the casing in the usual manner
This latter is of cast iron made in two parts as hereafter described.
A space is left around the porcelain cylinder A and the outer cast iron cylinder C
so as to leave a narrow continuous space between the porcelain cylinder and its
outer casing not only at the circumference but also at the ends and for this purpose

page_text: I form projections on the porcelain cylinder (these are not shewn in the drawing).
This space E is filled with plaster of Paris or other suitable.cement by which the
porcelain cylinder is set in and firmly united to the metallic casing.
The outer cylinder is provided with hubs c² and journals c³ for supporting it in
bearings and for the attachment of pulleys to transmit by belt or otherwise, motion
to the same as usual.
I make the outer causing C in two parts and provide them with lugs G to enable
me to first fit in the porcelain cylinder and then bolt the two parts together.
The aforesaid construction is compact, simple and strong and entails much less
labour than by masoning together small slabs in the manner of laying bricks as
heretofore has been done and of course entirely obviates the danger of such slabs
getting loose and falling in.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1st In a triturating cylinder the combination of an inner cylindrical jar A an
outer casing C made in two parts having journals and a cement interposed
between the said jar and casing substantially as set forth.
2nd A triturating cylinder constructed substantially as set forth.
Dated this 24th day of March 1886.
BROWNE & Co.,
Agents for the Applicant.