Improvements in Stone-breaking Machines.
Year: 1888

page_text: Date of Application, 29th Oct., 1888
Complete Specification Left, 27th May, 1889-Accepted, 20th July, 1889
PROVISIONAL SPECIFICATION.
Improvements in Stone-breaking Machines.
I, ARTHUR HOPE, of Yarra Bank South, South Melbourne, in the Colony of
Victoria, Engineer, do hereby declare the nature of this invention to be as follows :-
This invention of improvements in stone-breaking machines relates, first, to tho
construction of the jaws for breaking the stone; second, to the arrangement of a
wedge or key for adjusting the bushes of the fulcrum lever-pins, and third, to the
means devised for adjusting the connecting-rod bearing pin which is at the lower end
of the fulcrum lever.
I make both the movable and the fixed jaw in two parts divided transversely of
their length and I make the lower parts wider than the upper parts. I prefer
to make the upper parts of each jaw in such a manner as that the teeth or projecting
points of the corrugation of the one are opposite the recesses in the corrugation of
the other jaw, and I prefer to make the lower parts of each jaw so that the teeth or
projecting points of the corrugation are opposite to the teeth of the jaw with which
it works. By so constructing these jaws the stone passes freely down from the upper
to the lower parts without choking or filling up the machine, besides which they
prevent the stone from being unduly crushed or pulverized. I am aware that jaws
of stone-breaking machines have before been made with the upper part divided from
the lower and when made in one piece or part, with the upper part narrower than
and gradually widening out to the lower and with their teeth or corrugations gradually
widening from the top to the bottom; but I am not aware that any machines
have been before made with the lower part of a divided jaw wider than its upper
part.
As an alternative I may make the jaws each in one piece but with the lower part
of each jaw suddenly widening out at a point similar to the line of division in the two
part jaws just described in fact, such jaws would be exactly the same as the two
part jaws, only made in one piece instead of two.
My invention also relates to the use of a wedge or key located within a hole or
core in the frame of the machine for adjusting the position of the lever fulcrum pin
of the movable jaw. The bushes in which the pin works are fitted in a slot of the
frame with distance plates at one end of the bush and the wedge or key at the other
end. And also to the manner of arranging the bearing pin for the connecting rod
in the lower end of the back lever, the pin being made with a squared part against
which is driven a wedge key lodged in a slot of the lever.
The mode of operation is as follows :-
The stone when broken between the upper pair of jaws falls into the space between
the lower, pair, which, being wider and having parallel and opposite teeth or corruga-
tions, allow of the stone being freely broken or cubed to its requisite size without
unduly crushing or pulverizing it.
בד
11
1771
1
1000
COMPLETE SPECIFICATION.
Improvements in Stone Breaking Machines.
I, ARTHUR HOPE of Yarra Bank South, South Melbourne, in the Colony of
Victoria, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement :-
:-
This invention relates to stone breaking machines and has for its object an improved

page_text: construction of the stone breaking jaws and improved means of adjusting and securing
the pin of the actuating lever and its fulcrum bushes, as I shall describe referring
to the accompanying drawings.
Fig. 1 is a side view of the two jaws of a stone breaking machine, shewing the
toggle and part of the actuating lever.
"
Fig. 2 is a front view of the stationary jaw and Fig. 3 a front view of the moving jaw.
Figs. 4 and 5 are horizontal sections respectively on and yy of Fig. 1.
Fig. 6 is a side view of the bearing for the fulcrum pin of the actuating lever and
Fig. 7 is a section on of Fig. 6.
According to one arrangement I make the stationary jaw in two parts A and A¹
and also the moving jaw in two parts B and B₁ so that the separate parts can be
readily removed when they become worn and inverted, thus presenting fresh acting
surfaces.
I also make the lower parts A and B wider than the upper parts A and B so as
to give more space for passage of the stone as it is crushed, and at the same time to
permit of the side wedges used for holding the lower part to pass outside those for
holding the upper part.
When inversion of the jaws is not desired, each of them may be made in one piece,
the lower parts in each case being widened out as shewn in Figs. 2 and 3. In either
construction the jaws may be secured to their holders by wedge bolts such as b*. The
teeth in the upper part of the one jaw are arranged opposite to the intervals between
the teeth of the other jaw as shewn in Fig. 4; but in the lower parts of the jaws the
teeth of both are opposite to one another as shown in Fig. 5. D is the lever which
oscillating with its pin E works the moving jaw B by the toggle C. I fix the pin E
in the eye of the lever D Fig. 1 by means of a wedge key K which passes through
a slot of the lever and bears against the side of a squared part of the pin E. When
after the key K has been fully driven there is still slackness, the pin E can be turned
one quarter round so as to present another side of its squared part for the key to
bear against. The ends of the pin E work in bushes F as shewn in Figs. 6 and 7.
These bushes are fitted in slots of the frame G and adjusted in position by introducing
a number of packing plates H at one side of each bush and tightening up by driving
a wedge key I bearing against the other side. In order to prevent access of dust or
grit to the bearings, the ends of the pin and the bushes may be protected by cover
plates J.
I am aware that jaws of stone breaking machines have been made in separate
pieces and that the acting parts of the jaws and their teeth have been made to widen
out gradually downwards, therefore make no general claim to jaws made in pieces
or wider at their lower than at their upper ends, but,
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a stone breaking machine the use of jaws each having an upper and a lower
portion in two separate pieces or in one piece, the upper portions having the teeth
of the one facing the intervals between the teeth of the other, the lower portions
being abruptly widened and having the teeth of the one opposite the teeth of the other,
substantially as described.
2. For fixing the pin in the oscillating lever of a stone breaking machine, the
combination of a wedge key with a squared part of the pin, substantially as and for
the purpose set forth.
3. For adjusting and securing the bushes for the lever pin, the use of packing
plates on one side of each bush in combination with a wedge key bearing against the
other side, substantially as described:
Dated this wil
1004
ABEL & IMRAY,
Agents for the Applicant.