Improvements in Apparatus for Feeding Ore and the like to Crushing Machines.
Year: 1896

page_text: Date of Application, 6th May, 1896
Complete Specification Left, 12th Jan., 1897-Accepted, 6th Mar.. 1897
Improvements in Apparatus for Feeding Ore and the like to
Crushing Machines.
We, THE SANDYCROFT FOUNDRY AND ENGINE WORKS COMPANY LIMITED
of Sandycroft, Flintshire, and RUDOLPH OSWALD AHLERS, of Sandycroft,
Flintshire, Engineer, do hereby declare the nature of this invention to be as
follows:-
Our invention relates to certain improvements in apparatus for feeding ore and
the like to crushing machines, the invention consisting in an improved construction
or arrangement of parts of what is known as the Challenge Ore Feeder, the object
being to obtain a reduction in the number of parts and to dispense with that part
of the feeder which experience has proved to be the most liable to breakage and
which is also the most costly to replace.
In carrying out the invention we dispense with the toothed wheels and the shaft
with its bearings and the separate friction wheel which latter we place directly
under the revolving table, in fact by preference casting the revolving part of the
friction wheel directly to the underside of the table or to a plate which covers
same.
The feeder thus consists of the usual sloping table fixed upon a shaft carried in
suitable bearings, the upper part of the friction wheel secured to the table, the
essential portion of which is a hub extending into the lower part of the friction
wheel, and this latter which consists of a rim suitably mounted and loose upon the
shaft, the inner surface of the rim acting as the friction surface for the spring
controlled toggle blocks which are carried by toggle arms the other extremities of
which engage with the hub of the upper part of the wheel.
The lower part of the wheel carries an arm attached to a bell crank operated by
a rod which is in turn operated by a moving part of the crusher, in the case of
ordinary ore stamps by the tappets of same. The spring toggles cause the blocks to
grip the rim of the lower part of the wheel so that when the latter is swung or
partly rotated in one direction by the action of the bell crank and arm the upper
part of the wheel is moved through the hub of same and the table is thus partly
rotated and the ore upon it moved. The lower part of the wheel is then drawn
back in the return direction by means of a spring secured to some fixed part with
the result that the blocks do not engage with the rim and the table (which is held
by a brake shoe pressing on the rim) remains stationary.
The modifications in the constructions of the feeder above described apply also
to the suspended type.
PHILIP M. JUSTICE,
Chartered Patent Agent, 55 & 56 Chancery Lane, London,
For the Applicant.

page_text: Improvements in Apparatus for Feeding Ore and the like to
Crushing Machines.
We, THE SANDYCROFT FOUNDRY AND ENGINE WORKS COMPANY LIMITED;
of Sandycroft, Flintshire, and RUDOLPH OSWALD AHLERS, of Sandycroft,
Flintshire, 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 :-
Our invention relates to certain improvements in apparatus for feeding ore and
the like to crushing machines, the invention consisting in an improved construction
or arrangement of parts of what is known as the Challenge Ore Feeder, the object
being to obtain a reduction in the number of parts and to dispense with that part
of the feeder which experience has proved to be the most liable to breakage and
which is also the inost costly to replace.
In carrying out the invention we dispense with the toothed wheels and the shaft
with its bearings and the separate friction wheel which latter we place directly on
the underside of the revolving table, in fact by preference casting the revolving
part of the friction wheel or clutch directly to the underside of the table or to a
plate which covers same.
To clearly explain the invention reference is made to the accompanying drawings
in which:
Fig. 1 is a general view shewing an arrangement of the feeder in connection
with an ore stamp of the "Californian type.
"
Fig. 2 is a sectional elevation on an enlarged scale of the feeder table and
supporting parts.
Fig. 3 is an elevation of the table and friction wheel.
Fig. 4 is a plan of a part of Fig. 3 on the line - looking upward.
Fig. 5 is a plan of a part of the friction wheel removed from the table, and
Fig. 6 shows a front and edge view of a spring for the table.
The feeder consists of the usual sloping table a fixed upon a shaft b carried in
the footstep or socket c which is mounted on a suitable base. The underside of
the table carries a hub d which extends into the friction wheel or clutch e said
wheel having a rim e and being carried loosely on the shaft & its collar e2 bearing
on the top of the footstep or socket c. The inner surface of the rim el serves as a
friction surface for blocks f against which bear toggle arms g the other ends of
which can move freely in jaws formed on the hub d.
On one side of one of the jaws holding each toggle arm is secured a spring the
other end of which bears against the block f.
The friction wheel carries also an arm i to which is connected one end of a bell
crank lever; suitably pivoted to a part of a frame k which supports the ore hopper.
The other end of the lever j is attached in the case of the form of stamp illustrated
to a rod suitably supported which is operated with each blow of the tappet m
means being provided for suitably adjusting the length of stroke of the crank j.
The arm i may however be operated in different ways according to the class of
crusher or other apparatus to which the ore or the like is to be fed.
A spring n Figs. 1 and 6 is attached to the base of the table or to some suitable
point its end being hooked to the arm i or to the friction wheel e so as to bring the
friction wheel back after a movement of the crank, or a spring of some other form
may be attached to the crank itself and to the frame, or the wheel may be brought
back in many other ways. The friction wheel is provided with hand holes e
Figs. 2 and 5 by means of which the toggle arms may be inserted without

page_text: removing the table. The footstep or socket c is provided with an oil cup to
contain oil and a groove communicating therewith is formed in a lining of
some anti-friction metal in which the shaft revolves. The table a may be
provided with an additional top a' bolted or secured thereto which may be readily
replaced when worn by the contact of the ore thereon.
To hold the rim of the table a brake shoe o is caused to press against it by a
spring p which is suitably carried by a part attached to the framing.
The operation of the apparatus is as follows:-
Ore falls from the hopper shown in Fig. 1 and is delivered onto the table
between two curved plates forming the mouth of the hopper as is well known one
of such plates being partly indicated in dotted lines in Fig. 2 at r. Upon the
arm being swung round the friction wheel is carried with it in the direction
shown by the arrow Fig. 4 and the blocks ftbus operate the toggle arms g
causing them to bind or tighten up against the hub d of table a and thus to swing
said table with said wheel. At the end of the swing of the arm the spring n
brings back the friction wheel e the springs assist in keeping the toggles g in
place and the table being held by the brake o a fresh space is presented on the
table on which ore may fall from the hopper a quantity having been delivered to-
the stamp by the movement of the table.
There is another type of this feeder known as the suspended type and the
present arrangement of friction wheel and table is equally applicable to it.
We have described herein a particular construction of friction wheel or clutch
but it will be evident that other forms of friction wheels or clutches which will
effect the same purpose may be applied to the table in the manner described.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. In apparatus for feeding ores and the like the combination with the ore table
of a friction wheel or clutch situated or carried on the underside of same
substantially as and for the purpose set forth.
2. The combination with the ore table of a wheel or loose part on the underside-
of same a portion of such table co-operating with the wheel or loose part to form
a clutch or friction device which is operated substantially as and for the purpose
described.
3. The arrangement and construction of ore feeder table and friction wheel
substantially as and for the purpose described.
4. The arrangement and construction of apparatus for feeding ore and the like
to crushing machines substantially as described and illustrated in the drawings.
Dated the 12th day of January 1897.
PHILIP M. JUSTICE,
Chartered Patent Agent, 55 & 56 Chancery Lane, London,
For the Applicant.