Improvements in Crushing Machines.
Year: 1886

page_text: Date of Application, 3rd Aug., 1886.
Complete Left, 13th Dec., 1886.
Complete Accepted, 22nd Mar., 1887.
PROVISIONAL SPECIFICATION.
Improvements in Crushing Machines.
I, WILHELM SCHRANZ of Laurenburg on the Lahn in the Empire of Germany,
Engineer, do hereby declare the nature of my said invention for IMPROVEMENTS IN
CRUSHING MACHINES to be as follows:-
These improvements relate to erushing-machines, which consists materially in a
metal or stone bow-plate which is fastened to a sector-shaped cast-body and made to
roll to and fro on a stationary straight plate. This rolling motion of the sector-shaped
cast-body is caused by moving the centre of the sector to and fro by means of an
excentric rod which is moved by the machine; the sector is suspended out of its centre
on a rod, which may oscillate.
The machine is driven by sheave-drums. The shaft of the fly-wheel has in the
middle of it an excentric swell (moulding) and bears in this place an excentric, the
lower end of which is joined with the centre of the sector-shaped crushing-body.
This crushing-body is suspended at another place by means of joint-pieces and when-
ever the centre of the crushing-body ascends or descends, the crushing-body rolls
along the stationary crushing-body or plate according as the lift of the excentric
permits it.
By applying drawing-rods, cross-pieces, screws and rubber-buffers the sector with
its bow-shaped crushing plate can be pressed more or less forcibly against the stationary
straight crushing plate. Strong steel-springs or counter-weights can be used in the
place of the rubber-buffers. The machine crushes the material fine or coarse according
as the mouth of it is adjusted narrow or wide and should too hard a substance be
accidentally thrown into the mouth of the machine, the sector plate sides off to the
back by which means a fracture of the machine is prevented.
11: 20th day of July 1886
A. KUHNT & R. DEISSLER,
Berlin, Alexanderstr., 70.

page_text: I, WILHELM SCHRANZ of Laurenburg on the Lahn, in the Empire of Germany,
Engineer, do hereby declare the nature of my invention for IMPROVEMENTS IN
CRUSHING MACHINES and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
These improvements relate to a crushing machine which consists materially in a
metal or stone bow plate, fastened to a sector-shaped cast body and made to roll to and
fro on the surface of a stationary straight plate. This rolling motion of the sector-
shaped body is caused by moving the centre of the sector to and fro by means of an
eccentric rod, which is moved in its turn by the machine. The sector is suspended at
its middle point to a rod, which may oscillate.
The machine is driven by sheave-drums or by a crank and has one or more fly wheels
to counterbalance the shocks. The shaft of the fly-wheel has in the middle of it an
eccentric swell (moulding) and bears in this place an eccentric strap the lower end of
which is joined with the centre of the sector shaped crushing body. This crushing-
body is suspended at another place by means of joint-pieces, and whenever the centre
of the crushing-body ascends or descends, the crushing-body rolls along the stationary
crushing plate, according as the lift of the eccentric permits it.
By applying drawing rods, cross-pieces, screws, and rubber-buffers the sector with
its bow-shaped crushing-plate can be pressed more or less forcibly against the stationary
straigt crushing plate. Strong steel springs or counter-weights can be used in the
place of the rubber-buffers.
The machine crushes the material fine or coarse, according as the mouth of it is
adjusted narrow or wide, and should too hard a substance be accidentally thrown into
the mouth of the machine, the sector plate moves back by which means a fracture of
the machine is prevented.
Figs. 1 and 2 show a side elevation, and a horizontal view of such a crushing-
machine.
d is the frame of the machine and in it the shaft a of the machine has its bearings;
this shaft has an eccentric swell (moulding) a¹ which is spanned by an eccentric
strap a². The eccentric rod is marked e'. The latter is encircled by a boss m, against
the one side of which the sector shaped body rests, while a strong steel spring r
presses against the other side. This steel spring is intended to take up the counter
pressure off and yields whenever the resistance offered by the material to be crushed
is too great. The sector-shaped body is suspended by means of the pin o¹ to the
two rods or suspenders, which are pivoted in the frame d on the axle o. The body,
which has on its front side the actual crushing plate k, oscillates on the pin o¹.. k¹ is
the counter-crushing surface and is fastened to the frame d.
The way in which the machine works is as follows:
In fig. 1 the eccentric is shown in its lowest position. The jaws of the crushing
machine, which are formed by the plates & are as wide open as possible. The

page_text: spring presses the boss m as well as the sector shaped body with exactly regulated
force, against the straight crushing surface k¹. It must be remarked that the spring r
can be compressed or released as may be required by means of the adjustable wedge i.
If the eccentric a¹ moves upwards and carries with it the eccentric rod e¹ and the
boss m the sector-shaped body will oscillate, but in such a manner that the point o¹
does not remain stationary, but approaches first the plate and then recedes from it
during the oscillation. Owing to the ascending motion of the boss m, the surface k of
the sector-shaped body swings along the straight surface k¹ and performs the same
motion as a cradle. The material that happens to be between the two surfaces is
necessarily crushed by this motion, for the spring does not allow the eccentric rod e¹
to give way and therefore the crushing surface & is not allowed to withdraw from the
straight crushing plate k¹. But whenever the hardness of the material to be crushed
exceeds the power of the spring, the latter will yield, and owing to its being able to
give way in time, all danger of breakage is obviated.
According as the spring is compressed, the material can be crushed coarse or fine,
for the result of the crushing operation depends upon the distance, the surface k is
from the surface at the bottom.
The cast body can be provided with a second spring or buffer n¹ which prevents the
cast-body pushing against the plate if the machine is moved and no material brought
into the crushing apparatus. The spring a holds the cast body away from the straight
plate k so that disagreeable noise between the two bodies is avoided. This spring n'
is illustrated by dotted lines in fig. 1.
Having now particularly described and.ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is:
1.) The application of a swinging sector shaped rolling-body ƒ in connection with a
stationary crushing surface substantially as and for the purpose described.
2.) The combination of the sector-shaped crushing-body with the supporting rod 1,
the eccentric rod e¹ (that lifts the body f) and the stationary crushing surface k¹ in
order to produce the rolling and swinging motion of the crushing-body.
3.) The combination of the parts claimed in claim II in connection with the spring
and the adjusting wedge i, in order to crush the material coarse or fine as required and
to prevent breakage.
Dated this 10th day of December.
A. KUHNT & R. DEISSLER,
Attorneys.