Improvements in Crushing Machines.
Year: 1890

page_text: Date of Application, 1s: Nov., 1890
Complete Specification Left, 7th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Crushing Machines.
CHARLES EDWARD HALL of Meersbrook Bank Sheffield in the County of
York Engineer do hereby declare the nature of this invention to be as follows:-
In constructing crushing machines with two or more vibrating jaws, and of
imparting thereto simultaneously a combined crushing and rubbing action between
the wearing faces of the said jaws, by the introduction at their upper end of.a
multiple excentric shaft in lieu of the usual fulcrum shaft, and of giving rotation
to the said excentric shaft by means of the usual fly wheels and belt pulley.
In conjunction with the said multiple excentric shaft and jaws, I use thrust
toggles or levers, which rest in a suitable recess towards the lower extremity of the
jaw-one toggle for each jaw. The other end of the said toggles or levers are
bored out and have their bearings upon a second single excentric shaft. Suitable
bearings for the said shaft are cast or affixed to the rear of the main frame of the
crusher. A worm & wheel for rotating the second excentric shaft from the outside,
and of fixing the said shaft in any desired position are employed; by this means
the jaws of the crusher may be opened or closed for coarser or finer crushing
without stopping the machine.
Instead of the above appliance, the usual wedge and toggle block may be used.
The main frame of the crusher may be in one or several parts, and the main
bearings may be cast thereon or affixed thereto, but in order to put into perfect
equilibrium all the moving parts, and to take the weight off the bearings of the
thrust toggles or levers, I place across the main frame at the rear of the jaws, a
casting or bridge piece, from which depends a forked stud screwed at the shank,
with lock nuts and cushion. This stud passes through the said casting and is
capable of vertical adjustment. A. rocking lever upon a central stud passes
between the said forked stud, and to the outer ends of the rocking lever, are
attached vertical rods coupled at their lower extremity to each thrust toggle.
To reduce the friction caused by the simultaneous crushing and rubbing of the
jaws upon the multiple excentric shaft; I make roller bearings within the said jaws
by surrounding each excentric by a number of hard steel rollers, running in oil
with a cover plate at the end. The said jaws are bored out truly in the lathe at
the eye, and a hardened steel bush is inserted to facilitate renewals in case of
wear.
These improvements remove some very serious defects in machines of this class,
and greatly reduce the power required to do a given amount of work.
CHARLES EDWARD HALL.
COMPLETE SPECIFICATION.
Improvements in Crushing Machines.
CHARLES EDWARD HALL of Meersbrook Bank Sheffield 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 :-
In constructing crushing machines, with two or more vibrating jaws; and of
imparting thereto simultaneously a combined crushing and rubbing action between
the said vibrating and fixed jaws of such machines, by the introduction of a
multiple eccentric shaft at the upper end or eye of said vibrating jaws, instead of

page_text: the usual fulcrum shaft, and of giving rotation to said shaft by means of the usual
pulley and fly wheels.
In conjunction with the said multiple action eccentric shaft and jaws I use a
toggle or thrust lever, (one to each jaw) resting one end in said jaw at its lower
back extremity, and the other end in a recess, in a toggle block sliding in guides
cast upon the main frame. An eccentric shaft mounted in bearings also upon the
main frame, passes through the said toggle block, & by its rotation the vibrating
jaws, may be opened or closed whilst the machine is working.
Instead of the above arrangement, the usual toggle wedge & block may be used
in connection with a screw & nut for opening and closing the jaws.
The main frame may be in one or several parts with bearings secured thereto in
any well known manner.
In order to maintain an equilibrium of all the working parts 1 place across the
frame, a bridge piece with an eye bolt, and equal ended lever from which depend
two rods, one for each toggle, which supports the motion work vertically, whilst I
use a rocking lever and two horizontal rods for equilizing the motions of the
vibrating jaws. In order to still further reduce the friction of the machine, I may
employ ball bearings completely surrounding the eccentric shaft instead of white
metal or brass bushes hitherto used in crushing machines.
In order that my said invention may be clearly understood I have added one
sheet of drawings. The same letters refer to like parts in each figure.
Fig. 1 is a longitudinal vertical section Fig. 2 is a plan Fig. 3 a vertical section
shewing the simple toggle block and wedge arrangement of my crusher.
A is the main frame. B is the multiple eccentric shaft. C is the roller or other
bearing in the jaw. D are the steel rollers. E is the driving pulley. F the fly
wheels. G the fixed crushing faces. G & G the vibrating jaw faces. H the
thrust toggle. I main bearings. J toggle block bush. K vibrating jaws.
L vertical rocking lever. M attachment eye. N single eccentric shaft.
O horizontal rocking lever & stud. P india rubber buffers. V toggle block.
O¹Fig. 3 toggle block. N wedge. 3 & 4 top and bottom guides.
By this improved arrangement of parts I secure a powerful crushing and rubbing'
action upon the material and a complete balancing of all the working parts; a
great reduction in the power required to do a given quantity of work, and less
strain upon the machine as compared with other systems.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, 1 declare that what
I claim is.
1. Arranging two or more crushing jaws directly upon a multiple action eccentric
shaft and of balancing the motion work as described.
2. The combination of parts constituting the multiple action crusher with means
of opening and closing jaws as described and illustrated in Figs. 1. 2 & 3.
Dated this 4th day of May 1891.
CHARLES EDWARD HALL.