Improvements in Stone Breaking and Ore Crushing Machines.
Year: 1899

page_text: [Date of Application, 9th Oct., 1899-Accepted, 11th Nov., 1899
Improvements in Stone Breaking and Ore Crushing Machines. 1
I, WILLIAM HENRY BAXTER, of 71, Gelderd Road, Leeds, in the County of
York, 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 improvements in stone breaking and ore crushing
machines.
Hitherto the toggles employed on stone breaking and ore crushing machines
have been provided with semi-circular ends arranged to fit into and work in
corresponding recesses cast or otherwise formed for their reception in the movable
jaw stock, pitman or connecting rod (hereafter termed the pitman"), and one
of the movable wedges termed the toggle block, thus causing a large amount of
friction and wear and tear on these parts at their point of contact, and at the
same time there is a difficulty in lubricating the said parts.
Now the object of this invention is to so construct and shape the ends of the
toggles of the machine that the friction at their points of contact respectively
with the movable jaw stock, pitman, and one of the movable wedges, usually
termed a toggle block, may be reduced to a minimum. At the same time pro-
vision is made whereby the portions of the movable jaw stock, pitman, and toggle
block in contact with the toggles may be easily renewed, as well as more readily
lubricated than at present.
In the drawings hereunto annexed I have shown the invention applied to a
stone breaking and ore crushing machine of similar construction to that
described and illustrated in the Complete Specification accompanying my Appli-
cation for Letters Patent filed the Twenty-third day of May 1899, No. 10,729,
but I distinctly wish it to be understood that the invention is not limited to
this particular construction of machine, as it may be equally as well applied to
and combined with other forms or construction of stone breaking and ore
crushing machines.
Fig. 1 is a sectional elevation and Fig. 2 a plan looking at the top of a stone
breaking and ore crushing machine with this invention applied.
a is the main framework of, the machine which may be formed in one piece or
built up in parts bolted or otherwise fixed or secured together by any convenient
means, and it may be made of any suitable material, such as, say, cast iron or
steel. the fixed jaw which is arranged in the framework a in the usual position.
c the movable jaw stock which is mounted on, and to be pendant from a shaft </
carried in bearings formed for its reception in the framework. e the renew-
able jaw face fixed to the jaw stock c. f the pitman mounted pendantly upon
an eccentric j fixed on shaft g, which shaft is arranged to be carried in bearings
formed in brackets or arms hh forming part of or attached to the moving jaw
stock, said arms being provided with caps ii for retaining the shaft g in position.
k the driving pulley, the fly wheels, m the toggles, constructed as here-
after described, respectively interposed on each side of the pitman between the
movable jaw stock and movable wedge n for adjusting toggle block o.

page_text: pq drawback rods (adjustable or otherwise) connected respectively at their
outer ends to the movable jaw stock and to a spring buffer r. The inner ends
of the draw back rods are provided with hooks to which the ends of chain s
are attached, and which chain is employed for suspending and retaining the
pitman in an upright position. u a grooved or other runner mounted upon a
pin or stud fixed to the lower portion of the pitman; under the periphery of
the runner the chain passes. t are side wedges for renewing wear and tear of
framework a by the reciprocation of the movable jaw stock c.
All the above described parts, with the exception of the toggles, are of usual
and well known construction and may be arranged and combined together and
operate in a similar manner to that described in the said Specification No. 10,729
of 1899.
Instead of making the ends of the toggles m and the recesses in which they
work semi-circular as hitherto, I make them shaped as shown, and at the
point where each side of the V meets they are united together by a very short
arc to prevent a cutting edge being formed.
The V's respectively of the toggles m and of the recesses are made at different
angles, that is to say the angle of the V shaped recesses in the blocks w are
made less acute than the angle of the V's at the ends of the toggles. This
not only permits of the parts in contact being easily and readily lubricated, but
in the event of the end of a toggle m working out of position during a portion
of the movement of the movable jaw stock and pitman, it will readily move
back into its proper position on the return or movement in an opposite direction"
of the said two parts. At the same time the friction at the points of contact
of the toggles m in their recesses is reduced to a minimum.
To enable the blocks w,which may be made of cast or wrought iron or steel,
or of a metal or material harder than that of which the, movable jaw stock c,
pitman and toggle block o are made, to be readily renewed as they become
worn or damaged they are shown made separate and detachable from the said
parts, and arranged to be fitted and securely fixed by any suitable ordinary and
well known means, such as, say, keys, wedges, screws, or the like or run in
with metal, in dovetail or other recesses formed for their reception therein.
But when it is preferred the herein described V shaped recesses may be cast or
otherwise formed in and form a part of the movable jaw stock, pitman, and
toggle block in a similar manner to that hitherto done or employed in the case
of the hereinbefore mentioned semi-circular recesses.
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. In stone breaking and ore crushing machines the use of toggles provided
with shaped ends such as described and arranged to work in V shaped recesses
of a less acute angle than that of the toggles, said recesses being formed either
in the moving parts of the machine or in blocks let into the same, as and for
the purposes set forth.
2. The combination and arrangement of parts constituting the stone breaking
and ore crushing machine substantially as described and illustrated.
Dated this Sixth day of October 1899.
WILLIAM HENRY BAXTER.