IMPROVEMENTS IN MACHINERY FOR BREAKING STONE AND OTHER HARD SUBSTANCES
Year: 1874

page_text: LETTERS PATENT to George Henry Goodman, of Penrose Street,
Newington, in the County of Surrey, Engineer, for the Invention of
"IMPROVEMENTS IN MACHINERY FOR BREAKING STONE AND OTHER HARD
SUBSTANCES."
Scaled the 16th October 1874, and dated the 1st September 1874.

page_text: for the same, and have made solemn Declaration that I am the first and
true Inventor thereof.
NOW KNOW YE, that I, the said George Henry Goodman, do hereby
declare the nature of the said Invention to be as follows:-
This Invention has for its object improvements in machinery for breaking
stone and other hard substances. For this purpose I employ a moving
block having a crushing face, and opposed to it there is another crushing
face which is fixed. Between the faces there is a hopper-like space or
crushing cavity into which the material to be crushed is placed. The
moving block is actuated by an eccentric passing through it, and it thus
receives a short rotary and reciprocating motion, causing it to alternately
approach to and recede from the fixed face with a curvilinear motion,
which is more effective than a direct motion in crushing the material
placed in the crushing cavity. So far, however, there is no novelty in
the arrangement, but the novel feature in my Invention is the mounting
the moving block receiving motion from an eccentric in the manner
above stated, so that it may have a shorter stroke and consequently a
mcre powerful action at the upper than at the lower part of the crushing
cavity. This is desirable because at the upper part of the cavity the
machine has to contend with the larger pieces of the material as it is
first brought to the machine, whereas lower down in the crushing cavity
smaller material only has to be dealt with. I provide a fulcrum for the
crushing block at a point above the upper end of the crushing cavity,
and this fulcrum is on the end of a rocking lever. Thus I effectually
control the upper end of the crushing block without incurring any
serious wear at the fulcrum or loss of power from friction. I prefer to
make the machine double with a crushing cavity on each side of the
crushing block.
In order that my said Invention may be most fully understood and

page_text: and are grooved on the face as in other crushing machines of this class.
The frame also carries the axis c. d is the crushing block; it has
crushing faces d³, d¹, clamped upon it, and the axis o passes through it.
The portion of the axis within the block d is eccentric to the parts
carried in the bearings on the frame a.
The axis c is driven in any
convenient manner, and it has a fly wheel c¹ upon it. The axis c in
revolving moves the crushing block d in a circuit up and down and to
and from the fixed faces b, b. The extent of the motion of different
parts of the block is controlled by the fulcrum levers e, e, each of which
abuts on one of its sides in a cavity prepared for it in the upper end of
the block, and on the other side cach lever e abuts in recesses formed in
the two side checks of the frame. The fulcrum levers e, e, allow the
upper end of the block d to rise and fall freely under the influence of
the eccentric, but the lateral motion which they permit to the part of
the block which is between them is but very slight, but this lateral
motion or motion to and from the fixed crushing faces increases in
passing downwards towards the bottom of the block, and it is greatest
at the bottom, where a free escape for the material from the crushing
cavity is required, and where the pieces of stone to be acted upon being
of small size a smaller crushing power will suffice.
In place of the fulcrum levers e, c, friction rollers or other equivalent
means may be applied to guide the upper end of the block d, but the
arrangement shewn is preferable.
Having thus described the nature of my said Invention, and the
manner of performing the same, I would have it understood that I claim,
the method of constructing machinery for breaking stone and other hard
substances, substantially as described.
In witness whereof, I, the said George Henry Goodman, have
hereunto set my hand and seal, this First day of September, in
the year of our Lord One thousand eight hundred and seventy-
foun