IMPROVEMENTS IN MACHINERY FOR BREAKING STONES, ORES, SUGAR, BONES, OR OTHER HARD OR BRITTLE SUBSTANCES
Year: 1873

page_text: LETTERS PATENT to William Smith, the younger, of Barnard Castle,
in the County of Durham, for the Invention of "IMPROVEMENTS IN
MACHINERY FOR BREAKING STONES, ORES, SUGAR, BONES, OR OTHER HARD OR
BRITTLE SUBSTANCES."
Sealed the 6th March 1874, and dated the 9th September 1873.
COMPLETE SPECIFICATION filed by the said William Smith at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 9th September 1873, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO. WHOM THESE PRESENTS SHALL COME, I, WILLIAM
SMITH, the younger, of Barnard Castle, in the County of Durham,
send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS IN
MACHINERY FOR BREAKING STONES, ORES, SUGAR, BONES, OR OTHER HARD OR
BRITTLE SUBSTANCES," and have petitioned Her Majesty to grant unto me,
my exécutors, administrators, and assigns, Her Royal Letters Patent

page_text: ribs, grooves, or flutings upon its circumference. Upon either side
of the cylindrical roller I suspend from bars, bearings, or pivots, fitted
to the upper part of the framing, a jaw or plate, the side of which.
next to the roller may be straight, but which I prefer to make curved
and having vertical ribs, grooves, or flutings upon its face. These
jaws or plates are so arranged that their upper parts are further
removed from the roller than their lower ends, and the jaws, together.
with the roller and the inner sides of the framing, form a hopper into
which the substance to be crushed or broken is fed, and after having
been broken between the jaws and the periphery of the roller by the
lateral vibration of the latter caused by the revolution of the driving.
shaft it falls through the openings between the roller and the lower
edges of the jaws.
The periphery of the roller and the face of the stationary jaws may be
made moveable so as to be renewed when worn.
In order to regulate the size of the fragments into which the sub-
stance is broken I make the lower edges of the jaws adjustable nearer.
to or further from the roller, and I prefer to do this by arranging
an excentric upon a shaft or axis immediately behind each jaw, so that
the pressure upon the jaw is received by the excentric. And I arrange
the excentrics so that they can be turned round to any desired position,
and thus bring the face of the jaws to any required proximity. to the
roller, and I fix the excentric in such position by means of bars or links
adjustable by means of screws, bolts, or pins.
I also sometimes arrange one or more adjustable bolts or stays con-
necting together the lower ends of the suspended jaws.
I prefer to make the cylinder described revolve slowly on its axis
whilst it is vibrating laterally between the suspended jaws. For this
purpose I make or fix at or near one or both ends of the cylinder a
toothed wheel of sufficient size and strength which gears into a wheel of
larger diameter and having internal teeth, which is formed upon or fixed
to the inner side of the framing, of the machine.
The accompanying Drawing is in illustration of my Invention.
Figure 1 is a plan of a machine constructed according to my In-
vention; Figure 2 is an elevation of the same with one side of the
framing removed.

page_text: a, a¹, are the two sides of the framing; b is the cylinder having
longitudinal corrugations, and turning freely upon the excentric part
(between the frames a, a¹,) of the driving shaft h, which also carries
the fly wheels c, c¹; d, d¹, are the stationary jaws having vertical
corrugations which are suspended between the frames a, a', by the 5
bolts e, e', and are adjustable at their lower edges by the excentrics
ff, the position of which can be adjusted and fixed by the bars and
screws, shewn at 9, 9¹, g², g³. The adjustable bar k is for the purpose
of steadying the jaws d, d².
Having now described my Invention, and the manner in which it is 1
to be performed, I claim,-
First. The cylindrical jaw arranged loose upon the excentric shaft,
substantially as and for the purpose described and shewn in the
Drawing:
Second. The combination with the cylindrical jaw of stationary jaws 1
suspended from their upper ends, and adjustable by means of excentrics
at their lower ends, substantially as and for the purpose described and
shewn in the Drawing.
Third: The method of causing the cylindrical jaw to revolve by means
of gearing, substantially as and for the purpose described.
"
Fourth. The general arrangement of the apparatus, as described and
shewn in the Drawing...
1
In witness whereof, I, the said William Smith, the younger, have
hereunto set my hand and seal, this 6th day of September, in
the year of our Lord One thousand eight hundred and seventy- 2
three.
"