IMPROVEMENTS IN MACHINERY FOR BREAKING AND CUBING STONE
Year: 1871

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co., Patent Agents, Southampton Buildings, London, for
the Invention of "IMPROVEMENTS IN MACHINERY FOR BREAKING AND
CUBING STONE."-A communication from abroad by Jonas Brown
Rider, of Melbourne, in the Colony of Victoria, Engineer.
Sealed the 7th October 1871, and dated the 19th August 1871.
COMPLETE SPECIFICATION filed by the said William Robert Lake at
the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 19th August 1871, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London, send greeting.
WHEREAS I am in possession of an Invention for “IMPROVEMENTS
IN MACHINERY FOR BREAKING AND CURING STONE,” and have petitioned Her
Majesty to grant unto me, my executors, administrators, and assigns,
Her Royal Letters Patent for the same, and have made solemn
Declaration that it has been communicated to me from abroad by Jonas
Brown Rider, of Melbourne, in the Colony of Victoria, Engineer.

page_text: :
:
declare that the following Complete Specification, under my hand and
scal, fully describes and ascertains the nature of the said Invention,
and in what manner the same is to be performed, in and by the following
statement, reference being had to the accompanying Drawing forming
a part of this Specification.
This Invention consists in certain improvements in machinery for
breaking and cubing stone, and has for its main object the preparation
of road metal in a cubical form.
According to my Invention an oscillatory or vibratory motion is
imparted to the upper part of a vertical lever or. hammer by means
of a cam.
This lever is situated in the centre of the machine and is
connected to the cam shaft by means of a pair of bushes working in a
slot in such lever, the lower end thereof being supported by a pin or
spindle proceeding from or supported by the side of the casing of the
machine. On each side of this lever or hammer a jaw is attached whose
lower portion has a flange which fits into a corresponding groove made
for the purpose in the side of the lever, which projects at this point so as
to permit of such groove being made, and to support the jaw the upper
portion of each of these jaws is kept in position by means of an iron band
passing around a lug at the top and binding them to the lever, so that by
loosening this band the jaws can be lifted out and fresh ones substituted
for them with the greatest facility. Opposite to each of these movable
jaws is a fixed jaw firmly attached to and supported by each end of the
casing, and having lugs or flanges proceeding from each side of its upper
ends, with slots cut in them to permit of their being fastened by wedges
to each side of the casing. The gauge of the stone to be broken is
adjusted by the insertion of packing or lining between these jaws and
the casing.
One marked peculiarity of my Invention is the construction of the
face of the jaws, which consists of a series of recesses, each made (by
preference) in the shape of an inverted pyramid, so that the projecting
and consequently acting surface of the face of each jaw consists of a
series of 'transverse lines or ridges made at right angles to each other
and forming the base of the series of inverted pyramids just referred
to. These lines or ridges are so arranged that those on the moveable.
jaws do not work opposite those on the fixed ones but between them.
•

page_text: DESCRIPTION OF THE DRAWING.
Figure 1 is a side elevation of my improved machine for breaking and
cubing stone; Figure 2 is a top view, Figure 3 an end view, and
Figure 8 a side sectional elevation of the same; Figures 4 and. 5 are
plans of the face of each set of jaws, and Figures 6 and 7 are side eleva-
tions of the same. Like letters indicate the same parts throughout the
Drawing.
A is the casing of the machine; B, the driving shaft ;. C, O, the fly
wheels, and D, D, are fast and loose pullies ;. E is the vertical lever or
hammer, supported by the spindle F and operated by the cam G, to the
shaft of which it is attached by a pair of bushes H working in slot I;
J, J, are the movable jaws having flanges at the bottom fitting into
groves K and lugs at the top marked L bound to the lever by means of
the iron band M; N,N, are the fixed jaws, and O, O, the lugs or flanges
at the top. The inverted pyramidal shaped recesses are clearly shown
in Figures 4 and 5. The working faces of the jaws I prefer to make
of "Bessemer" steel, and the brasses are adjusted by means of a nut
acting on the smaller end of a wedge upon which a screw thread is cut.
The stone to be treated is to be fed into one or other of the spaces
between the jaws, when it will be broken into nearly cubical pieces by
means of the projecting ridges. Of course other jaws might be sub-
stituted for them if preferred, and the method of operating them still
retained. In the event of the stone to be operated upon being in large
blocks, I should prefer to place two machines together, one above the
other, so that the upper one could be used for breaking down the stone,
and the lower one'for cubing and finishing it. The construction of jaws
with the working face removable is obviously applicable to any other
arrangement of machinery for the same purpose.
Having thus described the nature of the said Invention as communi-
cated to me by my foreign correspondent, and the manner in which the
same is to be performed, I would have it understood that I do not
confine myself to the precise details herein set forth and illustrated in
the Drawing, so long as the nature of the said Invention be retained;
but I claim,-
First. The use in stone breaking or cubing machines of a moveable
jaw (or jaws) operated by the direct action of a cam, substantially as
herein described and explained.

page_text: Second. The use of jaws in stone breaking or cubing machines having
a removablo face.
Third. The use of removable jaws in stone breaking or cubing
machines, when such jaws receive motion by a direct cam action,
substantially as herein described and illustrated in Figure 1 of the 5
.Drawing.
Fourth. The construction of stone breaking or cubing machines in
which both the movable and fixed jaws have horizontal as well as
vertical corrugations or ridges therein, and recesses between such ridges,
substantially as herein described and illustrated in Figures 4, 5, 6, and 7 1
of the Drawing:
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Nineteenth day of August, in
the year of our Lord One thousand eight hundred and seventy-
one.
1
Witness,
E. C. JACKSON.
WILLIAM ROBERT LAKE. (L.S.)