An Improved Machine for Riddling, Grinding, Mixing and Riddling Coal Dust, Sand, and other analogous Materials.
Year: 1895

page_text: Date of Application, 18th Nov., 1895-Accepted, 18th Jan., 1896
COMPLETE SPECIFICATION.
An Improved Machine for Riddling, Grinding, Mixing and Riddling
Coal Dust, Sand, and other analogous Materials.
We, WALTER JAMES HOSGOOD, of 15 Park Crescent, Barry, near Cardiff in
the County of Glamorgan, Engineer and DAVID JOHN MORGAN of 16 Barry
Dock Road also in Barry aforesaid, Engineer, do horeby 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 an improved machine for riddling, grinding, mixing and
riddling coal dust, sand and other analogous materials, which is so constructed as.
to be conveniently adjustable to bring the materials to any required condition..
The machine is therefore specially adapted for treating sand for foundry moulding
but can be used with equal advantage for other kinds of sand as well as for coal
dust, and other analogous materials.
In the accompanying drawings Fig. 1 is a vertical longitudinal section, and
Fig. 2 is an end sectional elevation of a macbine constructed in accordance with
this invention. The same letters of reference are used to indicate the same or
corresponding parts in both figures.
The main body of the machine consists of a mixing chamber A supported on or
forming part of suitable standards J. B is a hopper which is situated in a
convenient position for the supply of the materials to be treated in the machine ;.
across the top of said hopper we secure a number of bars C to form a grating
and in its lower part we mount a riddle D which is reciprocated by suitable
mechanism from the crank shaft E which is connected by a belt, chain or other-
gearing to the crank shaft Q deriving motion from the main shalt H. Beneath the
riddle D we fit a pair of adjustable rollers F of a plain or twisted ribbed con-
struction, and adapted to be driven by means of suitable gearing G from the main
shaft H, in order to grind material passing from the hopper B to the mixing
chamber A. The said grinding rollers F are fitted with a relief spring 1 at
each end to prevent a breakage to the machine in case a piece of iron or other
unbreakable material should accidentally pass through the hopper. Suitable
scrapers for cleaning the rollers are fitted to the machine just underneath the
said rollers. Through the mixing chamber A passes the main shaft H supported
in suitable bearings in the standards J and fitted, inside the chamber A, with dust.
collars K. On the shaft H is arranged a series of adjustable blades or agitators M.
We may if desirable secure on the inside of the walls of the chamber A a series of
fixed blades or agitators so disposed as to be out of the path of travel of the blades.
or agitators M on the shaft H. A door N is provided on the mixing chamber A
to enable the blades or agitators to be easily got at for the purposes of adjustment,.
replacement, or repair. If desired more than one agitator spindle H may be
fitted in the mixing chamber A.
The material is delivered by the outlet of the mixing chamber A upon a riddling
device O which is adapted to slide on curved supports P, its reciprocation being
effected by suitable mechanism from the horizontal crank shaft Q carried by the
brackets R. The riddling device O is fitted with two sieves S one above the other and
of different mesh, so that the product riddled has three grades one being delivered
at each end of the riddling device O, and the third being that which passes down
through both sieves.

page_text: Machines constructed in the manner hereinbefore described will be found of
value in the saving of labour for the mixing and grinding of coal dust, sand and
analogous materials and in its convenient adjustability to bring the materials to
any required condition.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that what
we claim is
The combination of parts forming our improved machine for riddling, grinding,
mixing and riddling coal dust, sand and other analogous materials, arranged to
operate in the manner substantially as described and illustrated in the accompanying
drawings.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicants.