Improvements in Stone Crushers.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Stone Crushers.
We, JOHN FREDERICK WEBB, of 83, Bridge Road, Battersea, in the County of
Surrey, Engineer, JOSEPH EDWARD LILLEY, of The Chestnuts, Wealdstone, in the
County of Middlesex, Gentleman, and JOHN CHAPMAN, of 81, Saint Mary's Road,
Ealing, in the County of Middlesex, Gentleman, do hereby declare the nature of this
invention to be as follows:-
Our invention relates to machines for crushing stone and other minerals and has
for its object the arrangement and construction of such a machine of a simple and
effective form, but which at the same time is of less weight and cheaper to construct,
than similar machines, at present in the market.
To carry our invention into effect, we arrange a simple and light frame-work, which
carries bearings in which is mounted a shaft, provided with the usual fly wheels and
driving pulley.
Within the frame, we arrange a pair of crushing jaws, similar in form to those
already in use. On the portion of the shaft between the frames, we preferably
arrange two portions which are concentric to the axis, and one portion which is
excentric thereto, or vice versa.
The stationary jaw is provided, at its upper end, with a hole which engages loosely
above the concentric portions of the shaft. The movable or oscillating jaw is
pivotally connected to one end of a connecting rod, the other end of which is engaged
upon the excentric portion of the shaft.
The lower end of each jaw is pivotted to the bed plate, and in order to allow for
the adjustment of the jaws one to the other, we arrange the pivot pins, with the
portion that bears upon the jaws excentric to the portion or portions which are carried
by the frame, so that by turning the pivot pins in their bearing, the jaws can be
advanced towards or receded from one another. In order to facilitate this adjustment,
we may fit a wheel upon either one or both of the lower pivot pins, and we may
arrange spur or worm gearing, to co-act with this wheel, or these wheels, in order to
control and regulate the adjustment of the lower ends of the jaws to one another.
From this description, it will be obvious, that the strains due to the crushing of
material is entirely limited to the two crushing jaws, the part of the bed plate which
connects these jaws to one another, and the connecting rod, shaft, and pivot pins,
which give motion to the upper ends of the jaws.
We may if desirable arrange the fly wheels and driving gear at the lower end of
the jaws in a manner converse to that hereinbefore described; this a very convenient
arrangement when coarse crushing is required.
1007

page_text: We, JOHN FREDERICK WEBB, of 83 Bridge Road, Battersea, in the County of
Surrey, Engineer, JOSEPH EDWARD LILLEY, of The Chestnuts, Wealdstone, in the
County of Middlesex, Gentleman, and JOHN CHAPMAN, of 81 Saint Mary's Road,
Ealing, in the County of Middlesex, Gentleman, 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:-
Our invention relates to machines for crushing stone or other minerals and has for
its object the arrangement and construction of such a machine of a simple and
effective form, but which at the same time is of less weight and cheaper to construct
than similar machines at present in the markét.
In order that our invention may be the better understood we will now proceed to
describe the same in relation to the accompanying drawings reference being had to
the letters and figures marked thereon. Like letters refer to like parts in the
various figures.
Figure 1 is an end elevation of a machine constructed according to our invention,
Figure 2-is a side elevation of the same.
Figure 3 is a plan of the same and
Figure 4 is a detail part sectional plan of the operative mechanism.
Figure 5 shows an alternative method of adjustment of the jaws.
To carry our invention into effect we arrange a simple and light frame work A which in
the drawing, is shown, as consisting of steel plates, which are attached to and
supported by a bed plate B.
At the upper parts of these plates, castings are attached to form the bearings C,
in which is supported the shaft D, carrying fly wheels E E and driving pulley F.
Within the frame A we arrange a pair of crushing jaws G G¹, similar in general
form to those already in use. On the portion of the shaft D between the frames A,
we preferably arrange one portion d, which is concentric to the axis thereof, and two
portions d¹ which are excentric thereto or vice versa.
The jaw G, which is the stationary jaw, is provided at its upper end with a hole
which engages loosely about the concentric portion d of the shaft D. The movable
or oscillating jaw G¹ is pivotally connected to one end of connecting rods H, and the
other ends of the said connecting rods H are pivotally connected to the excentric
portions d¹ d¹ of the shaft A.
The lower end of the movable or oscillating jaw G¹is pivotted by the pin K to the
bed plate B, while the lower end of the stationary jaw G rests through the medium
of a wedge L against the pin M also held in the bed plate B.
.
The object of the wedge L is to allow the adjustment of the jaws one to the other, the
amount of such adjustment being regulated by the screwed shank N attached to
the wedge, which passes through a bracket O arranged upon the back of the jaw G,
and is held in position by nuts n n engaging the bracket. We may equivalently
effect this adjustment by engaging the lower ends of both jaws G G₁ on the pins M
and K respectively, and by making the portions of one or both pins, which bear upon
the jaws excentric to the portion or portions of the pins that are carried by the
frame, so that by turning either or both the pivot pins, in their bearings, the jaws
can be advanced toward or receded from one another. A simple method of effecting
this adjustment is shown in Figure 5, in which worm wheels P are fitted to each
pivot pins K and M into which gear worms Q carried on a shaft R adapted to be
turned by any suitable means, so as to control and regulate the adjustment of the
lower ends of the jaws to one another. It is obvious that only one pivot pin may be
made adjustable.

page_text: From this description it will be obvious, that the strains due to the crushing of
material is entirely limited to the two crushing jaws, the part of the bed plate which
connects these jaws to one another and the connecting rod; shaft and pivot pins
which give the relative motion to the upper ends of the jaws, and for this reason the
remainder of the machine can be made much lighter than in those cases as in the
ordinary form of crusher where the strains due to the crushing operation are passed
through the frame of the machine.
We inay if desirable arrange the fly wheels and driving gear at the lower end of
the jaws in a manner converse to that herein before described, as this is a very
convenient arrangement when coarse crushing is required.
Having now particularly described and ascertained the nature of our invention
and in what manner the same is to be performed we declare that what we
claim is :-
1st. In a crushing machine in combination a stationary jaw, an oscillating jaw, a
shaft adapted to rotate in bearings and having a concentric portion or portions to
engage the stationary jaw, and one or more excentric portions thereon, a connecting
rod or rods adapted to be pivotally connected at one end to the oscillating jaw and at
the other end to the excentric portion or portions of the said shaft and means for
maintaining the lower ends of the jaws in a given relative position, substantially as
described.
2nd. In a crushing machine, in combination, a stationary jaw, an oscillating jaw, a
shaft adapted to rotate in bearings, and having a concentric portion or portions to
engage the stationary jaw, and one or more excentric portions thereon, a connecting
rod or rods, adapted to be pivotally connected at one end to the oscillating jaw and
at the other end to the excentric portion or portions of the said shaft and adjustable
means for maintaining the lower ends of the jaws in relative position to one
another.
3rd. The arrangement and construction of a crushing machine substantially as
described and illustrated in the accompanying drawings.
Dated this 19th day of October 1907
FELL & JAMES,
1 Queen Victoria Street, London, E.C., Agents for the Applicants.