Improvements in Apparatus for Breaking Stone or other Mineral Substances.
Year: 1893

page_text: Date of Application, 21st Jan., 1893
Complete Specification Left, 19th Oct., 1893-Accepted, 25th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Breaking Stone or other Mineral
Substances.
I, THOMAS WHITAKER, of Horsforth, near Leeds, in the County of York,
Contractor, do hereby declare the nature of this invention to be as follows:-
This invention relates to that class of apparatus in which stones or other mineral
substances are broken or crushed by the action of a vibrating or oscillating jaw or
plate and is designed with the object of giving a knock more like the blow of a
hammer than the somewhat gradual crushing movement at present adopted.
It consists essentially in the combination with the movable jaw or plate of a
tappet or cam which will give a quick forward movement instead of the more
gradual movement of an eccentric or crank.
In carrying out the invention I prefer to construct the apparatus with a wrought
iron or steel framing which will give the necessary strength without the great
weight required in cast iron and to this frame I rigidly bolt one of the jaws or
plates and also pivot the other jaw or plate thereto. Behind the movable or
oscillating jaw I place a rotating tappet or cam with one or two risers thereon.
To the jaw itself I attach a couple of rollers or friction bowls against which the
tappets or cams work. I have preferably two of these friction bowls and two
tappets or cams at the back of each plate to exert an equal strain upon the jaw
or plate. At each revolution of the tappet the jaw is moved forward either once
or twice according to its shape or construction.
.
In a double machine one set of tappets would be placed between the two movable
jaws and alternately moved in one direction or the other the tappet being so
arranged that it will only act to move one jaw at a time.
By this arrangement. I consider I shall gain less of a crushing action and more
of a direct stroke to break the mineral and also an accelerated speed in the working
of the machine as with each revolution of the tappet shaft where two risers or
wipers on the cam are employed the jaw will move twice with each revolution of
the shaft.
Dated the 20th day of January 1893
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Breaking Stone or other Mineral
Substances.
I, THOMAS WHITAKER, of Horsforth, near Leeds, in the County of York,
Contractor, 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 :-
This invention relates to that class of apparatus in which stones or other mineral
substances are broken or crushed by the action of an oscillating or reciprocating
jaw or plate against a stationary one and is designed with the object of giving a
knock more like the blow of a hammer than the somewhat gradual crushing
movement at present adopted.
It consists essentially in the combination with the oscillating or reciprocating jaw
or plate, of a tappet or cam so formed as to act with a quick knocking or knapping
motion against the oscillating or reciprocating jaw twice during each revolution of

page_text: the shaft the crushing action upon the material continuing about one fourth of the
revolution instead of the more gradual motion of an eccentric or crank which have
hitherto been in use wherein the crushing action was continued for about one half
of the revolution or double the period.
The invention will be fully described with reference to the accompanying
drawings in which is illustrated a machine constructed according to this invention.
Fig. 1. Sectional elevation.
Fig. 2. Plan.
Fig. 3, detached view of driving shaft D with tappets or cams d.
The frame A is preferably constructed of wrought iron or steel to give the
necessary strength without the great weight required in cast iron and to this
frame the stationary jaw or plate B is rigidly bolted and the oscillating or
reciprocating jaw or plate C is pivoted in the usual way.
Behind the oscillating jaw C is placed the driving shaft D and immediately
behind the jaw Cand in position to come in direct contact with it I form the
shaft with two tappets or cams d which rise abruptly from the shaft-instead of
a gradual or regular eccentric such as has hitherto been used-and have a quick
sharp action when coming into contact with the jaw C which transmits to the
material a blow or "bat" similar to the sharp stroke or "knapping" motion of
the hand hammer.
Journalled on the back of the oscillating jaw C in the bearing E is a shaft F
with two friction bowls or runners f against which the cams or tappets d engage as
they rapidly rotate. The bearing E for the shaft F is adjusted by a wedge e and
screw e by which the wedge can be raised and lowered to regulate the distance
between the two jaws by forcing the jaw C forward or allowing it to fall backward.
It will be evident that instead of forging or forming the tappets d out of the
shaft D they may be placed thereon and attached by keys, screws or other means.
By this arrangement I consider I shall gain less of a crushing action and more
of a direct knapping or hammer stroke to break the mineral and also an accelerated
speed in the working of the machine as with each revolution of the driving shaft
the oscillating jaw C will make two strokes.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is : :―
1. A stone breaking machine provided on the driving shaft with a double quickly
rising cam or tappet to give a quick direct forward movement to the oscillating
jaw substantially as and for the purpose described and shown.
2. In a stone breaking machine the combination with the oscillating or recipro-
cating jaw C of the driving shaft D, the double cams or tappets d to give a quick
forward movement and knapping motion to the jaw, the shaft F, the friction
bowls f, the movable bearing E and the adjusting wedge e and screw e' substantially
as described and shown.
Dated this 18th day of October 1893.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.