Improvements in Stone Breaking and Crushing Machines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Stone Breaking and Crushing Machines.
I, WATSON FOGGO, of Anna Valley, Andover, in the County of Hants,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the construction and arrangement
of crushers and ore and stone breaking machines, the object being to produce a
machine which shall be less cumbersome and of lesser weight than the machines
at present in use, the parts of which shall be simple in construction, and capable
of easy adjustment.
In carrying my invention into effect, I mount my driving shaft with its fly
wheels or the like, within bearings mounted in any ordinary manner upon or
within the frame work of the machine; this frame work I make of cast iron
or cast steel, or I may build it up from wrought metal plates and attach the
bearings and other parts to the wrought frame work by rivets, bolts or the like
ordinary connections. I employ a swinging arm or crushing member which I
cause to be brought to and from a fixed die block or box into which the swinging
jaw or arm works, the swinging jaw being mounted in bearings carried upon
the frame work of the machine when employed in one type of machine which I
construct and being connected to the driving crank arms or connecting rods by
a toggle like distance piece or pieces.
To take off the strain from the frame work of the machine and to counteract
the resistance set up between the jaws, I tie my connecting rod ends to the fixed
jaw plate or die blocks of the machine by means of links or radius arms, these
links or arms being carried upon pivots or a shaft having an adjustable bearing
within the die blocks so as to take up any wear and tear arising during the
working of the machine.
I employ any well known spring or buffer connecting hooks or rods for keep-.
ing the swinging jaw in contact with the connecting rod or like members.
also make my jaw plates and crushing surfaces of the die box or fixed crushing
plate with any well known form of toothed or other surface to suit the nature
of the material which is to be crushed or operated upon.
I mount my rocking jaw in such a position as to give the necessary degree
of opening at the lower end of the box, the angle of the jaw and its bearings
being fixed to suit the determined size of the opening for any particular material.
Instead of mounting my rocking or swinging jaw upon independent bearings
attached to or formed upon the frame work I may form an anchorage for the
swinging arm or jaw upon the connecting rod or main moving member of the
machine the position of the jaws or attachment being determined to suit the
extent of movement which is required. I modify the form of my differential
toggle like distance piece which I employ to suit the strength of the machine

page_text: A block K having a piece of a corresponding inclination to the wedge block is
mounted upon the shaft K so that on the movement of the wedge block the extremity
of the connecting rod H may be moved to and fro and the movement of the
swinging jaw may thereby be varied so as to take up any wear and tear or to
increase or diminish the extent of closure of the jaws as may be required to
treat different kinds of ore or material or to crush such material to any required
mesh.
I employ any well known spring or buffer connecting hooks or rods L for
keeping the swinging jaw E in contact with the connecting rod H. I also make
my jaw plates and crushing surfaces of the die blocks or fixed crushing plate
with any known form of toothed or other surface to suit the nature of the
material which is to be crushed or operated upon.
I mount my crushing jaw in such a position as to give the necessary degree
of opening at the lower end of the box, the angle of the jaw and its bearings
being fixed to suit the determined size of the opening for any particular material.
In operation it will be understood that the rotation of the shaft A causes the
upward movement of the connecting rod H and consequently that of the
extremity of the side links J J while the horizontal throw of the crank causes
the toggle piece I to be thrust forward thereby effecting the movement of the
crushing jaw E. The stress imposed it will be understood is taken by the lateral
side links JJ.
The form of the toggle distance piece may be varied. As illustrated in
Figures and 4 the toggle distance piece may be provided with teeth which
engage with a corresponding set of teeth or rack upon the extremity of the con-
necting rod H and the back of the crushing jaw . As illustrated in Figure 1
the pitch line of teeth may be of a curvature of relatively great radius so that
the diagonal distance from i to ¹ may be greater than the length and that
thereby the movement of the swinging jaw may be accelerated and the throw of
the eccentric shaft reduced.
A toggle distance piece such as I' (Figure 5) may however be employed whose
extremities rest respectively within recesses provided in the connecting rod H
and back of the crushing jaw.
Instead of mounting my rocking or swinging jaw upon independent bearings
attached to or formed upon the frame work I may form an anchorage as shown
at G Figure 6 for the swinging arm or jaw upon the connecting rod or main
moving member of the machine the position of the jaws or attachment being
determined to suit the extent of movement which is required. Any well known
form of gearing may be employed for effecting rotation of the main shaft of the
machine and any modification may be made in the structure of the frame without
departing from the essential features of the present invention.
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 a crushing machine means for taking off the frame the stress imposed
on crushing substantially as hereinbefore described.
2. In a crushing machine means for taking off the frame the stress imposed
on crushing consisting of links such as J respectively connected to the operating
member and to the fixed die block substantially as herein before described.
3. A crushing machine consisting of a connecting rod whose extremity is con-
nected by means of links to the fixed die block and from which motion is com-
municated to the crushing jaw by means of a toggle which is thrust forward on
the movement of the connecting rod substantially as described.
4. A crushing machine consisting of a connecting rod whose extremity is con-
nected by means of links to the fixed die block and from which motion is com-
municated to the crushing jaw by means of a toggle which is thrust forward on