Improvements in Crushing Machines, chiefly designed for Crushing Rock, Stone, and the like.
Year: 1897

page_text: Date of Application, 16th Aug., 1897
Complete Specification Left, 1st Apr., 1898-Accepted, 18th June, 1898
[Communicated from abroad by WILLIAM HOWELLS and AUSTIN BERRY, both of
Klerksdorp, in the South African Republic, Millwrights.]
Improvements in Crushing Machines, chiefly designed for Crushing
Rock, Stone, and the like.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:-
This invention relates to crushing machines, and though primarily intended for
rock or stone crushing or breaking, may be employed for any other purpose for
which crushing machines are employed. It is designed with the object of pro-
viding a simple and efficient machine for the purpose, the wearing parts of which
may be easily and quickly replaced when worn.
It consists essentially of an adjustable tapered block pivoted at its lower or thin
extremity, and caused to oscillate between two fixed taper jaws, motion being
imparted by means of an eccentric shaft working in a deep slot or groove cut in
the top of the block.
In carrying out the invention, upon a suitable bed-plate are bolted or otherwise
firmly secured two jaws placed with their faces opposite to each other and of taper
section, to which suitable side pieces are bolted, the whole forming a wedge
shaped cavity, wide at the top and gradually diminishing towards the bottom. A
wedge shaped block or less acute taper, of nearly the same width as the jaws, is
introduced within this cavity and is pivoted at its lower or thin end by means of a
shaft working in suitable journals at either side of the machine, the said journals
or bearings being capable of being raised or depressed at will by means of set
screws or other suitable device. A deep groove or slot is cut along the top of the
block, within which an eccentrically mounted shaft is introduced. This shaft is
carried in suitable bearings at either side of the machine and provided with a
driving pulley or pulleys wherewith to impart motion to the machine.
On the shaft being revolved, its eccentricity engaging with the sides of the
groove or slot cut along the top of the centre block pivoted as described, causes the
same to oscillate between the fixed jaws of the machine. Any degree of fineness
or coarseness of crushing as desired may be obtained by raising or depressing the
centre block by means of the set screws, or other suitable device, already described.
False faces may be attached to the jaws and centre block by screws or other
convenient means, so as to be readily replaced when worn.
As the crushing faces become gradually worn, the wear may be taken up by
lowering the centre block by means of the set screws or other device as already
described.
nun 16th dow of August 1897

page_text: Improvements in Crushing Machines, chiefly designed for Crushing
Rock, Stone, and the like.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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:-
This invention relates to crushing machines and though primarily intended for
rock or stone crushing or breaking, may be employed for any other purpose for
which crushing machines are employed.
It is designed with the object of providing a simple and efficient machine for the
purpose, the wearing parts of which may be easily and quickly replaced when
worn. Among the improvements in our machine may be noted:-
1. The crushing block is driven from the top (ie. where the motion is longest)
as contrasted with the Blake-Marsden which is driven from the bottom (where
the motion is shortest)-thus effecting a saving in the horse power required.
2. Crushing may be carried on at both sides of the machine at once.
3. Any degree of fineness or coarseness in crushing may be produced at any time
by merely depressing or raising the crushing block by means of the set screws as
hereinafter described, and this without stopping the machine.
4. When some extraneous hard body is accidentally introduced between the jaws
of the crusher, (e.g. a hammer head) it is clear that something has to give way.
c.g. in the Gates crusher the main spindle usually parts, and in the Blake- Marsden
the fly wheel gives.
In our machine the construction is such that in a similar case, the machine auto-
matically stops crushing thus averting any possible injury.
Our machine will be more fully described with reference to the accompanying
drawings, in which :-
Fig. 1 is a plan
Fig. 2 a side view
Fig. 3 a longitudinal section, and
Fig. 4 a transverse section of our machine.
In carrying out our invention, upon a suitable bed plate, are bolted or otherwise
firmly secured, two jaws MM, placed with their faces opposite to each other, and
of taper section, to which suitable side pieces M'M' are bolted, the whole forming
a wedge shaped cavity, wide at the top and gradually diminishing towards the
bottom. A wedge shaped block B of less acute taper, and of nearly the same width
as the jaws, is introduced within this cavity and is pivoted at its lower or thin end
by means of a shaft D), working in suitable bearings E E at either side of the
machine, the said journals or bearings E E being capable of being raised or
depressed by means of set screws as at F F (Fig. 4). A deep slot or groove O is
cut along the top of the block B and is provided with replacable wearing
pieces L L dovetailed, or otherwise secured to the vertical sides thereof, between
which an eccentrically mounted shaft C is introduced. This shaft is carried in
suitable bearings at either side of the machine and provided with a driving pulley
or pulleys K wherewith to impart motion to the machine. The eccentricity in
the shaft V, already described, is produced by means of an eccentric sleeve fitted
over the said shaft and secured thereto by a pin or pins, of a strength sufficient
to stand the strain produced when crushing the rock or other substance, but
which, when any greater strain is brought to bear on the machine (e.g. when a
hammer head falls between the jaws), immediately breaks, thus allowing the shaft

page_text: to revolve within the eccentric sleeve and consequently stopping the motion of
the crushing block B.
False faces may be attached to the jaws and centre block as at G G by means of
screws or other similar device so as to be readily replaced when worn.
As the crushing faces become gradually worn, the wear may be taken up by
depressing the centre block 13 by means of the set screws F F already described.
On the shaft being revolved its eccentric portion, engaging with the wearing
pieces L L fixed to the sides of the groove O cut along the top of the block B,
pivoted at its lower end at D, as already described, causes the said block B to
oscillate between the fixed jaws of the machine. Any degree of fineness or coarse-
ness of crushing as desired, may be obtained by raising or depressing the centre
block B, by means of the set screws FF already described.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is :-
In machines for crushing and breaking rock or stone, the combination of two
jaws, placed with their faces opposite to each other and of taper section and to
which suitable side pieces are bolted, the whole forming a wedge shaped cavity,
wide at the top and gradually diminishing towards the bottom, with a block of less
acute taper and of nearly the same width as the jaws and which is inserted within
the cavity where it is supported at its lower end by means of a shaft which passes
through it and which works in ordinary bearings, which are capable of being raised
or depressed by means of set screws, substantially as described and set forth.
1 1000
HASELTINE, LAKE & Co.
45, Southampton Buildings, London, W.C., Agents for the Applicant.