Improvements in Apparatus for Crushing or Pulverizing Ores, Cements, and other Substances.
Year: 1889

page_text: Date of Application, 27th Mar., 1889
Complete Specification Left, 27th Dec., 1889-Accepted, 1st Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Crushing or Pulverizing Ores,
Cements, and other Substances.
I WILLIAM HENRY COWARD of Newark House, Railway Place, Bath, Engineer and
Machinery Broker, do hereby declare the nature of this invention to be as
follows:-
:―
My invention relates to improvements in the crushing or pulverizing apparatus for
which former Letters Patent were granted to me bearing date September 6th 1888
No. 12895. The said apparatus consists of a revolving drum containing an edge
runner rolling freely therein and provided with means for supplying the raw material
and for removing it when sufficiently reduced in a continuous manner and without
interrupting the working of the machine.
The object of my present invention is first to steady the edge runner so as to keep it
central between the sides of the drum and prevent any liability of its striking and
damaging the pockets by which the ground material is raised; secondly to enable the
roller to be variably weighted; and thirdly to facilitate driving the apparatus and
relieve the hollow axis of the weight of the drum.
The invention consists in securing the runner to a shaft which passes out through
an opening at the feed side of the drum and is mounted in bearings, the outer one of
which is free to oscillate on journals at right angles to the shaft so as to permit the
edge runner to rise and fall according to the amount of material beneath it whilst the
inner bearing is loaded by a weight or spring which is adjustable in order to vary
the effective action of the edge runner. The weight of the drum is mainly supported
on anti-friction rollers and the bearings of its tubular axis have only to keep the drum
in its upright position.
The inlet and outlet apertures of the drum are guarded by internal annular bevelled
surfaces acting as deflectors to divert the material falling from the cups towards the
centre of the roller path.
The drum is driven by peripheral spur gearing.
COMPLETE SPECIFICATION
Improvements in Apparatus for Crushing or Pulverizing Ores,
Cements, and other Substances.
I, WILLIAM HENRY COWARD, of Newark House, Railway Place, Bath, Engineer
and Machinery Broker, 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 the crushing or pulverising apparatus for
which former Letters Patent were granted to me bearing date September 6th 1888,
No. 12,895.
The said apparatus, with the improvements applied thereto, is illustrated in the
accompanying drawings, forming part of this specification wherein figure 1 is a longi-
tudinal sectional elevation and figure 2 is a face view, of the apparatus. Similar letters
of reference indicate like parts in both figures.
The apparatus consists mainly of a revolving drum A containing an edge runner B
rolling freely therein and provided with means for supplying the raw material and for

page_text: removing it when sufficiently reduced in a continuous manner and without interrupting
the working of the machine.
The object of my present invention is first to steady the edge runner so as to keep
it central between the sides of the drum and prevent any liability of the edge runner
striking the cups or pockets by which the ground material is raised; secondly to
enable the roller to be variably weighted and thirdly to facilitate driving the
apparatus and relieve the hollow axis of the weight of the drum.
The Invention consists in securing the runner B to a shaft which passes out
through the opening at the feed side of the drum A, and is mounted in hearings D, E,
the outer one. E of which is adapted to permit of rising and falling motion of the shaft
about a transverse axis. For instance, it may be in the form of a ball joint or it may
be a collar held between shoulders c on the shaft and mounted to oscillate on lateral
journals whose axis is at right angles to the shaft so as to prevent any longitudinal
movement of the shaft but permit the edge runner B to rise and fall according to the
amount of material beneath it. These journals e are mounted in bearings in fixed
brackets F and by this means the edge runner will be kept truly central between the
sides of the drum whilst the necessary freedom of rising and falling motion is per-
mitted to it. The inner bearing D is loaded by a weighted lever or a spring which is
adjustable in order to vary the effective action of the edge runner.
The weight of the drum A is mainly supported on anti-friction rollers G and the
bearings h of its tubular axis H have only to keep the drum in its upright position for
which purpose they confine the said tubular axis in the longitudinal direction and have
clearance in the circular direction. The inlet and outlet apertures of the drum are
surrounded by internal annular bevelled surfaces i acting as guards for the said
openings so as to cause the material, as it fal's from the cups a during the rotation of
the drum, to gather towards the centre of the roller path.
The drum may be driven by spur gearing, one of the rollers G being also a pinion
in gear with peripheral teeth on the drum, or, for small-size machines, a belt may run
directly on the periphery of the drum.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is ;-
1. In the herein described pulverizing. mill, anchoring. the edge runner shaft in an
oscillating bearing whereby the edge runner is kept centrally in its path in the drum
but has the necessary freedom to rise and fall, substantially as described.
2. In the herein described pulverizing mill, the combination, with the edge runner
and its shaft anchored to an oscillating bearing, as described, of the spring or weighted
downbearing for varying the load on the edge runner, as specified.
3. In the herein described pulverizing mill, mounting the hollow axis of the drum
in bearings which confine it in the longitudinal direction only, and supporting the
drum upon external friction rollers, substantially as specified.
4. The improved pulverizing mill; substantially as herein described and shewn in
the drawings.
W. H. COWARD.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.