IMPROVEMENTS IN MACHINES FOR CRUSHING ORES AND OTHER HARD SUBSTANCES
Year: 1874

page_text: LETTERS PATENT to Thomas Archer, the younger, of the Dunston
Engine Works, Gateshead-on-Tyne, in the County of Durham,
Engineer, for the Invention of "IMPROVEMENTS IN MACHINES FOR
CRUSHING ORES AND OTHER HARD SUBSTANCES."
".
Sealed the 3rd February 1875, and dated the 7th August 1874.
PROVISIONAL SPECIFICATION left by the said Thomas Archer at the
Office of the Commissioners of Patents, with his Petition, on the
7th August 1874.
I, THOMAS ARCHER, the younger, of the Dunston Engine Works,
Gateshead-on-Tyne, in the County of Durham, Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN MACHINES
FOR CRUSHING ORES AND OTHER Hard Substances," to be as follows :—
My Invention has for its object the construction of such machines in
such a manner as to adapt them for being worked either by manual
labour or by steam power, and consists in working the lover which gives

page_text: motion to tho moveable jaw by means of a cam formed with two or more
rises on it so as on each revolution of the cam shaft to give two or more
thrusts to the jaw.
The frame of the machine is made in the usual way, but with a step
picce cast to the insides thereof, having a slot which is chilled at the
timo of casting. In this slot is inserted the lever for acting on the
moveable jaw, which lever is bent in order to adapt one end for resting
on tho step in which it works, and the other end for being acted upon by
the cam.
Instead of forming a slot in the step of the lever to work in the
arrangement may be reversed, i.c., the slot may be formed in the lever,
and a corresponding projection on the step. Both the slot in the step
and the lever are cast in chills at the working parts in order that they
may be as hard as required, and fit so as to work with the least amount
of friction. The back of the moveable jaw and the face of the lever that
acts against it are also chilled. A bolt fastened to the bottom of the
moveable jaw passes through a hole in the lover to an india-rubber
spring, which serves to hold back the jaw and keep the end of the lever
down on the cam.
By means of the foregoing arrangement of the parts of the machine, on
applying either manual or steam power to the cam shaft, cach revolution
of the shaft will raise the end of the lever twice, and give two thrusts to
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Archer in the Great Scal Patent Office on
the 6th February 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
ARCHER, the younger, of the Dunston Engino Works, Gateshead-on.
Tyne, in the County of Durham, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of August, in the year 3
of our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors,

page_text: give and grant unto me, the said Thomas Archer, Her special licence
that I, the said Thomas Archer, my exccutors, administrators, and
assigns, or such others as I, the said Thomas Archer, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
MACHINES FOR CRUSHING ORES AND OTHER HARD SUBSTANCES," upon the condition
(amongst others) that I, the said Thomas Archer, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Thomas Archer, do hereby declaro
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Drawings hereunto
annexed and to the letters and figures marked thereon (that is to
say):-
.
My Invention of "Improvements in Machines for Crushing Ores and
other Hard Substances" has for its object the construction of such
machines in such a manner as to adapt them for being worked either by
manual labour or by steam power, and consists in working the lever
which gives motion to the moveable jaw by means of a cam formed with
two or more rises on it so as on each revolution of the cam shaft to give
two or more thrusts to the jaw.
The frame of the machine is made in the usual way, but with a step
piece cast to the insides thereof, on or in which step piece the fulcrum
of the lever for acting on the moveable jaw may be arranged. The mode
of arrangement however may be varied. In one mode the step piece
-may-
-havo-formed-in-it-a-slot-to-receive-the-end-of-the-said-lever, such-
slot being chilled at the time of casting; or instead of forming a slot in
the step for the lever to work in the arrangement may be reversed, that
is to say, tho slot may be formed in the lever and a corresponding pro-

page_text: WV W
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a longitudinal section, and Fig. 2 an end elevation of a
machine in which the end of the lever is arranged to be worked in a
vertical.direction, and with a crushing roller combined with the jaws.
L
Fig. 3 is a longitudinal section of a machine in which the end of the 3
lever is worked in a vertical direction without crushing rollers in com:
bination
,' [
:
Fig. 4 represents in sectional elevation two rollers (fluted at right
angles to each other) combined with the jaws.
„„„Fig. 5 is a plan or horizontal view of the rollers.

page_text: Figures 6 and 7 represent the bearing of the roller shewn in Fig. 1.
In these several Figures the same letters of reference indicate cor--
responding parts.
:
A, A, is the frame of the machine; B is the cam shaft, on which is
fixed the cam shewn in the Drawings with two rises; C is an adjusting
wedge fixed between the cam and the end of the lever in order to
regulate the action of the lever as required; D is the lever having its.
fulcrum on the pin D* fitted on the step piece E of the frame; F is the
operating part of the moveable jaw fitted into the front of the swing
jaw G, suspended from a fixed centre at H. Pieces of steel or chilled
iron are represented at I, inserted at the points of contact between the
back of the swing jaw G and the front of the lover D. In Fig. 3, where
no roller is employed, the bottom of the movable jaw has a piece. J for:
guiding the broken material into any required. position or receptacle. In
Fig. 1 the lower part of the moveable jaw is curved so as to adapt it for
working as required in combination with the roller K, the flutes on'
which are at right angles to those on the moveable jaw; L is the
stationary jaw. In Figures 1 and 3 M is a steel spring for holding back
the moveable jaw, and keeping the end of the lever against the acting
face of the cam. At N, in Figures 1 and 2, is shewn a steam cylinder with
its connections for.driving through a crank the cam shaft B. The machine
shewn in Fig. 3 may be driven in a similar manner, and both machines
may be driven by other means.
In Figures 1 and 6 is shewn a guard O at the back of the roller K in
order to support it as required, and thereby admit of a roller of smaller
diameter being employed, requiring a correspondingly smaller amount of
power to drive it. A similar guard P is shewn at the back of the rollers
K and K' in Fig. 4.
When two rollers are used, as shewn at Figures 4 and 5, it is intended
to arrange the flutes on them at right angles to each other respectively,
and they are to be driven by means of pinions Q, Q, which may be of
different diameters so as to produce a grinding action of the rollers.
It will be evident-that-on-applying power (either manual or
mechanical) to the shaft B the cam will be caused on each revolution
to act twice on the end of the lever D, and give two thrusts to the
moveable jaw F. The axle of the roller K being connected with the

page_text: shaft B by pulloys, and a band, as shown in Fig. 2, will receive its
motion so as to act on the material as it leaves the jaws.
The roller K may, if preferred, be driven with an intermittent motion
by means of a ratchet or otherwise, so as to cause it to stand still during
the thrust of the moveable jaw.
Having thus described the nature of the said Invention, and in what
manner the same is to be performed, I hereby declare that what I claim
as of my Invention is,―
First. The combination of parts forming the machine represented in
Figs. 1 and 2, and described.
Secondly. The combination of parts forming the machino represented
in Fig. 3, and described.
And, lastly. The adaptation and application to crushing machines of a
cam formod with two or more rises for working the lever which gives
motion to the moveable jaw in the manner herein-before described.
In witness whereof, I, the said Thomas Archer, have hereunto set
my hand and seal, the Second day of February, in the year of our
Lord One thousand eight hundred and seventy-fivo.
Witness,
JAMES JOHN CHRISTIE,
THOMAS ARCHER, JUN³. (L.S.)
Willington-on-Tyne,
Engineer.
"