Improvements in or connected with Stampers for Crushing Ores and other Materials.
Year: 1889

page_text: Date of Application, 28th June, 1889
Complete Specification Left, 28th Mar., 1890-Accepted, 3rd May; 1890
PROVISIONAL SPECIFICATION.
Improvements in or connected with Stampers for Crushing Ores
and other Materials.
I, JEBUS BICKLE, of Hayle, in the County of Cornwall Engineer, do hereby declare
the nature of this Invention to be as follows:-
My Invention has reference mainly to those kinds of stampers in which the
stamper heads and rods or lifters are operated by cams.
A stamper, say having a plurality of heads with improvements according to my
Invention applied thereto, consists and works as follows:-
Two sets of cams mounted on separate shafts are employed and revolved by suitable
power and gearing at equal speeds. One set of cams serve to act upwards on tappets,
secured to the "lifters," and "lift the lifters, whilst the other sot serve to act upon the
tappets downwards, that is, they press the lifters down in the crushing or pulverizing
stroke. The rapidity of the blows of the strikers therefore is independent of the speed
obtainable by or due to gravity and the machine therefore is capable of being worked
at any practical velocity.
The tappets surround the lifter shafts or are equivalently constructed and disposed
and are free to move axially or radially, and they (the cams and tappets) are so
arranged that they cause the lifters to be rotated during their descent, that is, during
their crushing stroke, and cause a grinding as well as a crushing action in the coffer
of the machine.
The cams are preferably of movable form, and may be of double or single form;
and the working parts are mounted in a suitable frame (vertical), and the machine is
driven or operated by belt or other suitable mode of transmitted power.
In action the lower cams raise the lifters and heads to any required height by
means of the tappets and at the moment of their release the upper cams act on the
same or other tappets and force the heads and lifters down into the coffer at a high
velocity and an increased speed of rotation, thereby producing a series of blows of a
rapidity dopendent on the speed of rotation of the cams and causing both a crushing
and grinding action in the coffer.
TAL: ALZAL 1
T
1000
By CHEESBROUGH & ROYSTON,
Agents for Annlicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Stampers for Crushing Ores
and other Materials.
I, JEBUS BICKLE, of Hayle, in the County of Cornwall Engineer, do hereby declare
the nature of this Invention to be as follows:-
My invention has reference mainly to those kinds of stampers in which the stamper
heads and rods, or lifters, are operated by cams.
A stamper, say having a plurality of heads, with improvements according to my
Invention applied thereto, consists and works as follows:-
Two sets of cams mounted on separate shafts are employed, and revolved, by
suitable power and gearing, at equal speeds. One set of cams serves to act upwards
on tappets secured to the "lifters," and raise the lifters, whilst the other set serves to
act upon the tappets downwards; that is, they press the lifters down in the crushing
or pulverizing stroke. The rapidity of the blows of the strikers therefore is inde-
pendent of the speed obtainable by, or due to, gravity, and the machine therefore is
capable of being worked at any practical velocity.

page_text: The tappets surround the lifter shaft, or are equivalently constructed and disposed,
and are free to move, axially or radially, and they (the cams and tappets) are so
arranged that they cause the lifters to be rotated during their descent, that is, during
their crushing stroke, and cause a grinding as well as a crushing action in the coffer
of the machine.
The cams are preferably of involute form, and may be of a single or duplex
construction; and the working parts are mounted in a suitable frame, and the
machine is driven or operated by belt or other suitable mode of transmitted power.
In action, the lower cams raise the lifters and heads to any required height by
means of the tappets, and at the moment of their release, the upper cams act on the
same or other tappets and force the heads and lifters down into the coffer at a high
velocity, and impart to them an increased speed of rotation. By this apparatus a
series of blows may be delivered at a rate iependent only on the speed of rotation of
the cams, and causing both a crushing and grinding in the coffer.
Having thus specified generally the nature of my invention, its description will now
be proceeded with in reference to the annexed sheets of drawings (which form a part
of this specification), by way of explaining more fully the nature of the invention.
The drawings and the description of them set forth together an apparatus for
crushing ores and other materials, involving the improvements the nature of which
has been above explained.
In the drawings, the same letters and figures of reference are used to denote the
same parts wherever they occur.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows, in side elevation, an apparatus for crushing ore or other material,
provided with the improvements according to my invention.
Figure 2 is an end view, partly in section, of the apparatus shown in Figure 1.
With reference to the drawings, A designates the coffer of the apparatus; B is the
stamper frame; and D are a plurality of stamp lifters, arranged and working in the
framie B E are the tappets on the lifters D); and a, b, are two sets of cams, mounted
in certain relative positions, as shown, on two separate shafts c, d, revolved in opposite
directions by means of the toothed wheels e, f, such wheels being driven by the
pulleys g, h, and belt i. The cams a, b, are of involute form and of duplex
;
construction.
In action the cam shafts c, d, are rotated in opposite directions through the toothed
gear e, f, and the lower cams a, being thereby rotated in the direction of the arrow
shewn in the drawings, press upon the under side of the tappets E and raise the
stamp heads or lifters "D; and at the moment of their release (as indicated in
Figure 1), the upper cams 6 come into action and press upon the tappets E and force
the stamper heads D down towards the coffer A, at a velocity due to the force so
applied, together with that of gravity. The rapidity of the blows of the stampers D
therefore is independent of the speed obtained by, or due to, gravity, and the
machine therefore is capable of being worked at any practical velocity.
It is to be observed that the tappets and "lifters" D are free to move axially or
radially, and they are rotated in one direction by the combined actions of the
cams a and b upon the tappets; that is to say, on the lifting action, the lower cams
give the tappets and lifters a partial rotation, and as these go out of action the
rotation so given is continued and increased by the upper cams acting upon the upper
edge of the tappets in the descending stroke, thus giving the "lifters" and stamper
heads in their descending stroke a positive rotative action, as well as a falling action,
the material in the coffer under treatment being thereby subjected to a combined
action or treatment of grinding and crushing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I would bave it understood
that the stamper set forth with reference to the drawings constitutes only an example
of the improvements according to my invention, and that therefore the invention is

page_text: not confined to the exact arrangement and combination of parts therein set forth,
but is susceptible of various modifications; and also the equivalents of the parts
specified may be employed without departing from my invention; and I declare
that what I claim in respect of the herein described invention is:―
1. Effecting both the down and up strokes of the lifters of "stampers" by positive
cam mechanism, whereby, in cam operated stampers, the downward movement of
the stamp heads is rendered most effective, and is independent of the speed due to
gravity, and by which a high rate of striking can be obtained; substantially as
described.
2. In stampers for crushing ore or other material the combination of a 'lifter;"
a tappet by which the lifter is raised and lowered; a cam for raising and rotating
said lifter; and a cam for imparting a downward and rotating movement to said
lifter operating substantially in the manner herein described.
i
3. Stampers for crushing ores and other material wherein the stamper heads
have imparted to them in their crushing stroke a positive rotative motion; for the
purposes described.
.
4. The herein described improvement in stampers, consisting in effecting the
combined action of grinding and crushing upon the material under operation, by
causing the stamper heads in the descending stroke to be forced downwards and
have imparted to them a positive rotative movement; substantially as and for the
purposes described.
5. In a stamper, two sets of cams, one set being adapted to be used for the
raising of the lifters of the stamper, and the other for forcing them down; sub-
stantially as and for the purposes described.
6. In stampers for crushing ores or other material, the combination with the lifters
thereof, of a tappet, and a cam adapted to act upon said tappet and lifter, and
impart the downward stroke thereto, substantially as and for the purposes set
forth.
7. In apparatus of the kind herein referred to, the cams a, b, shafts c, d, and
toothed wheels e, f, arranged and operating substantially as and for the puposes
set forth.
8. The stamper herein set forth with reference to the drawings, comprising the
coffer, lifters, two sets of cams and cam shafts, geared together, and frame, arranged
and adapted to operate as described.
Dated this 27th day of Maren JASO
March
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Agents for the Applicant.