Year: 1873

page_text: LETTERS PATENT to Austin Henry Smith, of Brooklyn, in the State
of New York, United States of America, for the Invention of " Iм-

page_text: a delivery mouth at the bottom that is wider than the upper end of the
hopper, thereby giving free space for the material to spread as crushed,
and to escape rapidly when reduced to the proper size. The moving jaw
is hung in adjustable bearings at the top, and the operative faces of the
jaws are ribbed or formed with projections. There is a hydraulic ram
jointed to the moving jaw, and this ram extends into a strong cylinder
or vessel containing water or other liquid. There is a link or rod con-
necting the jaw with a spring that is sufficiently powerful to draw the
jaw back and keep the ram firmly against the liquid in the cylinder.
A plunger working through a stuffing box, and actuated by a crank
or other suitable power is reciprocated in the liquid, and hence the ram
and jaw have a direct acting movement back and forth at the same time
of the most powerful character, the extent of movement being regulated
by the displacement of the plunger in proportion to the area of the
ram.
A safety valve is provided to prevent injury to the crusher, and also
an inlet valve and supply pipe for the liquid.
An adjustable stop determines the backward movement of the ram
and jaw, hence liquid will be drawn into the cylinder when the plunger
rises after the ram has been arrested by the stop, thereby compensating
loss of liquid.
By this construction the crushing operation is performed with but
little loss through friction, the power is direct acting, and there is not
as much strain on the parts as usual in such machines, and the adjust-
ment to vary the size of the lumps of stone or other material is very
casily effected. The ram may be sustained in an adjustible bearing to
prevent wear in the cylinder.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Austin Henry Smith in the Great Seal Patent Office
on the 1st July 1873.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of January, in the
year of our Lord One thousand eight hundred and seventy-three,
in the thirty-sixth year of Her reign, did, for Herself, Her heirs and
5 successors, give and grant unto me, the said Austin Henry Smith, Her
special licence that I, the said Austin Henry Smith, my executors, adminis-
trators, and assigns, or such others as I, the said Austin Henry Smith,
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 " IMPROVE-
MENTS IN MACHINERY FOR CRUSHING STONE AND OTHER SUBSTANCES," upon the
condition (amongst others) that I, the said Austin Henry Smith, my
executors or administrators, 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 Austin Henry Smith, do hereby
declare 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 made to the Drawings
hereunto annexed, and to the letters and figures marked thereon (that
is to say) :-
Stone crushing machines have been made with one jaw stationary and
the other movable, and having a swinging or rocking motion, so as to
crack and break the stone or ore between the corrugated surfaces of said
jaws. Difficulty has been experienced in applying the power to the
moving jaw without great loss by friction, and risk of the parts breaking
when any hard piece, such as a steel chisel point, becomes wedged in
between the jaws. My Invention is for removing these difficulties by
applying the direct action of water in a close chamber to give motion to
the rocking jaw. For this purpose I employ a close vessel of great
strength containing water or other liquid, and at one side of this vessel
is a cylinder and piston, the rod of which acts upon the moving jaw.
The power is derived from a reciprocating plunger that is forced into the

page_text: liquid in the vessel, and by the displacement thereof moves the piston
outwardly, and thereby the hydraulic force is applied directly upon the
moving jaw without unnecessary loss by friction.
I compensate for any leakage of the liquid from the vessel by a supply
that is drawn in whenever the plunger in drawing back produces a
minus pressure.
I provide a variable stop to regulate the return or opening movement
of the jaw, and a safety valve to prevent injury to the apparatus in caso
of any substance getting between the jaws that cannot be crushed.
In the Drawing Fig. 1 is a vertical longitudinal section of the appa-
and
ratus; Fig. 2 is a transverse section of the same at the line x, x;
Fig. 3 is a section through the hopper at the line y, y.
The stationary jaw a is connected with the water vessel 6 by the
frames or side pieces c, c, and between these is the moving jaw d. These.
jaws a and d are preferably made as hereafter described, but they may 1
be of any desired construction, and adapted to the character of work to
be performed.
The jaw d is shown as swinging upon the shaft or trunnions e and a
rod or rods with an india-rubber or other spring ħ are employed to
draw back the jaw and open the same, the spring resting against the
cross bearer k, and the nut i being applied to the rod g to regulate the
force that acts to open the jaw and move the actuating ram in its return
motion. The trunnions e may be in adjustable bearings, so as to allow
of the jaw d being moved to give greater or less space between it and
the stationary jaw.
The actuating ram or piston is made to fit the cylindrical
opening n in the water vessel b, and extends in the form of a rod or ram
to the outer side of the moving jaw. I prefer that the said rod (1) be
spread so as to take a long horizontal bearing against the side of said
jaw.
The distance that the jaw d and ram are allowed to move back is
regulated by the screw o that has a cylindrical rod passing through a
stuffing box p, and forming a stop that determines the return movement
of said ram. The plunger passing through the gland or stuffing box 8
is connected to a crank or other device for communicating a recipro-
cating motion, and the amount of movement may be variable, so as to
be in proportion to the movement given to the jaw d by the ram 7, for

page_text: AUSTIN H. SMITH. (L.S.)
Witnesses,
CHAS. H. SMITH,
119 & 121, Nassau St., New York.
HAROLD SERRELL,
119 & 121, Nassau St., New York.