IMPROVEMENTS IN MACHINERY OR APPARATUS FOR BREAKING OR CRUSHING STONE AND OTHER HARD AND BRITTLE SUBSTANCES."
Year: 1880

page_text: LETTERS PATENT to George Dalton, of Leeds, in the County of York, for an
Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR BREAKING
OR CRUSHING STONE AND OTHER HARD AND BRITTLE SUBSTANCES."
PROVISIONAL SPECIFICATION left by the said George Dalton at the Office
of the Commissioners of Patents on the 27th January 1880.
GEORGE DALTON, of Leeds, in the County of York. "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR BREAKING OR CRUSHING STONE AND OTHER
HARD AND BRITTLE SUBSTANCES."
My Invention relates to further improvements in that description of apparatus
for breaking or crushing stone and other hard and brittle substances which is known
as Blake's improved stone breaking machine.
According to a former Invention for which I have obtained Letters Patent, dated
the 28th August 1879, No. 3461, the oscillating or movable jaw itself of the
machine is mounted upon a cam or eccentric on the actuating shaft, so that such
jaw is operated direct in lieu of the motion being transmitted to it through the
intervention of an intermediate bar or lever mounted upon the said cam or
eccentric. A downward motion is thus imparted to the jaw, whilst the lateral
thrust is communicated by toggles, the arrangement being such that the shaft is
relieved of nearly the whole of the strain to which the apparatus is subjected under
the breaking or crushing action.
According to my present Invention I accomplish the same objects in machines
actuated through the intervention of a lever in the following manner:-
The oscillating or movable jaw is pivotted (by preference at its lower end) to
one arm of a double armed lever or set of double armed levers mounted upon a
centre or fulcrum in the framing, and the other arm or arms of which lever or
levers are jointed to a lever or bar operated by an eccentric cam or crank upon the
actuating shaft. Adjustable toggles are provided as under my said former Invention
for obtaining the lateral thrust of the jaw, which in conjunction with its downward
motion produces the breaking or crushing action.
In some cases, with the view of economizing power, or when the machine is used

page_text: for breaking only, I dispense with the downward motion of the jaw and arrange
the parts in the following manner, viz. :-
The intermediate lever to which the lever or bar operated by the eccentric cam
or crank is connected is bent or turned upwards, and so shaped and arranged as to
act as a toggle, the block or crease of which constitutes the fulcrum of the lever,
and its motion is transmitted to the movable jaw by means of another toggle or
set of toggles upon which it acts.
The throw of the eccentric cam or crank may be arranged to impart either a
single crushing action or two crushing actions for each revolution of the driving
shaft, and the lever or bar operated by the said eccentric cam or crank may be
made in sections of length connected together by screws and nuts so as to admit of
the acting length of the lever or bar being increased or diminished according to
the throw of jaw required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Dalton in the Great Seal Patent Office on the 15th July
1880.
GEORGE DALTON, of Leeds, in the County of York. "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR BREAKING OR CRUSHING STONE AND OTHER
HARD AND BRITTLE SUBSTANCES."
My said Invention relates to further improvements in that description of
apparatus for breaking or crushing stone and other hard and brittle substances
which is known as Blake's improved stone breaking machine.
According to a former Invention for which I have obtained Letters Patent, dated
the Twenty-eighth August, One thousand eight hundred and seventy nine, No. 3461,
the oscillating or moveable jaw itself of the machine is mounted upon a cam or
eccentric on the actuating shaft so that such jaw is operated direct, in lieu of
the motion being transmitted to it through the intervention of an intermediate
bar or lever mounted upon the said cam or eccentric; a downward motion is thus
imparted to the jaw, whilst the lateral thrust is communicated by toggles; the
arrangement being such that the shaft is relieved of nearly the whole of the strain
to which the apparatus is subjected under the breaking or crushing action.
According to my present Invention I accomplish the same objects in machines
actuated through the intervention of a lever in the following manner :-
The oscillating or moveable jaw is pivotted (by preference at its lower end) to
one arm of a double armed lever mounted upon a centre or fulcrum in the framing,
and the other arm or arms of which lever or levers are jointed to a lever or bar
operated by an eccentric cam or crank upon the actuating shaft. Adjustable
toggles are provided as under my said former Invention for obtaining the lateral
thrust of the jaw, which in conjunction with its downward motion produces the
breaking or crushing action.
In some cases, with the view of economizing power, or when the machine is
used for breaking only, I dispense with the downward motion of the jaw, and
arrange the parts in the following manner, videlicet :-
:-
The intermediate lever, to which the lever or bar operated by the eccentric cam
or crank is connected, is bent or turned upwards, and so shaped and arranged as
to act as a toggle, the block or crease of which constitutes the fulcrum of the lever,
and its motion is transmitted to the moveable jaw by means of another toggle or
set of toggles upon which it acts.
And in order that my said Invention may be fully understood, I shall now
proceed more particularly to describe the same, and for that purpose shall refer to
the several Figures on the annexed two Sheets of Drawings, the same letters of
reference indicating corresponding parts in all the Figures.
Figure 1 (Sheet 1) of the accompanying Drawings represents a side sectional
elevation of a machine, constructed according to my present Invention, for imparting
a combined downward and lateral motion to the oscillating or moveable jaw.
Figure 2 (Sheet 2) represents a side sectional elevation of a machine constructed
according to my present Invention, in which the downward motion of the oscillating
or moveable jaw is dispensed with.
Referring to Figure 1, the oscillating or moveable jaw A is pivotted at its lower
end a to one arm b of a double armed lever B mounted upon a centre or fulcrum c
in the framing C, and the other arm b¹ of which lever is jointed at 6' to a lever or
bar E operated by an eccentric cam or crank d upon the actuating shaft D. A
downward motion is thus imparted to the oscillating or moveable jaw A,
and the lateral thrust of the jaw (which in conjunction with its downward
motion produces the breaking or crushing action) is communicated through the

page_text: intervention of adjustable toggles F, as described in the Specification to my said
former Letters Patent.
Figure 2 illustrates an arrangement of machine which I adopt with the view of
economizing power, or where the machine is used for breaking only.
According to this arrangement the downward motion of the jaw is dispensed
with, and the jaw is operated in the following manner :-
The intermediate lever G, to which the lever or bar E, operated by the eccentric
cam or crank d is connected, is bent or turned upwards, as shewn at g, and so
shaped and arranged at g¹, gl, as to act as a toggle, the bar g2 of which constitutes
the fulcrum of the lever, and its motion is transmitted to the moveable jaw by
means of another toggle F upon which it acts.
The throw of the eccentric cam or crank d may be arranged to impart either a
single crushing action or two crushing actions for each revolution of the driving
shaft D, and the lever or bar E, operated by the said eccentric cam or crank, may
be made in sections of length e, e, connected together by screws and nuts f so as to
admit of the acting length of the lever or bar being increased or diminished
according to the throw of jaw required.
It will be understood that in the preceding description were a single lever and
toggle are referred to a set of levers and toggles may be applied in like manner.
Having now described and particularly ascertained the nature of my said
Invention, and the manner in which the same is or may be used or carried
into effect, I would observe in conclusion that what I consider to be novel and
original, and therefore claim as the Invention secured to me by the hereinbefore
in part recited Letters Patent is,―
First. Constructing machines of the class hereinbetore referred to, substantially
in the manner hereinbefore described and illustrated in Figure 1 of the accom-
panying Drawings.
Second. Constructing machines of the class herein before referred to, substantially
in the manner hereinbefore described and illustrated in Figure 2 of the accom-
panying Drawings.
In witness whereof, I, the said George Dalton, have to this my Specification
set my hand and seal, this Tenth day of June, One thousand eight hundred
and eighty.
GEORGE DALTON. (LS.)