Improvements in Ore Crushers.
Year: 1896

page_text: Date of Application, 11th Feb., 1896-Accepted, 18th Apr., 1896
COMPLETE SPECIFICATION.
Improvements in Ore Crushers.
I, JOHN ROGER, of 1718 California Street, Denver, in the County of
Arapahoe, and State of Colorado, United States of America, 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:-
The object of my invention is to provide an ore-crusher which comprises two
rolls, arranged one above the other, one of which has a free vertical movement
with respect to the other and by its own weight crushes the ore; furthermore, to
provide means for checking or limiting the upward movement of the roll and serve
to exert a downward pressure on said roll; and finally to provide an ore-crusher
which shall be simple of construction, durable in use and comparatively inexpensive
of production.
With these objects in view, the invention consists of certain features of con-
struction and combination of parts which will be hereinafter fully described and
claimed.
In the drawings:-
Figure 1 is a side view of my improved ore-crusher
Figure 2 is a front view of the same with the hopper omitted.
Figure 3 is a longitudinal vertical sectional view of the machine.
Figure 4 is a transverse vertical sectional view on line - Figure 1.
Figure 5 is a detail view of one of the blocks 13.
In the drawings, 1 denotes the frame of the machine which comprises the bed
plates 2, and the sides 3 having braces 4, and 5, the front edges of the sides being
provided intermediate their ends with U-shaped extensions 6 having bearings 7
supported by braces 71. Mounted in these bearings is the shaft of the lower
crusher roll 8 one end of which shaft is extended and is journaled in a bearing in a
support 9 aud is provided with a drive pulley 10. To securely hold the shaft of
the lower roll in the bearings 7 I provide a shoe 10' which partially embraces the
shaft and is provided with a bolt 11 and adjusting nut 12. An L-shaped block 13
abuts against the forward end of the shoe 10' and projects forward and is provided
with perforations 14 which register with the perforations in the ears 16 formed on
the inclined post above and below the U-shaped extension. Bolts 17 are passed
through the perforations in the block and ears and nuts 18 are screwed upon
their ends thus securely holding the shaft in its bearings in the frame and
preventing the spreading or breaking of the U-shaped extension.
Rising from each bed plate of the frame are two guides 18' between which
slides a yoke frame 19 which is preferably cast hollow as shown and which is
provided at its upper ends with bearings 20. Bolts 21 are passed through the upper
ends of each set of guides and serve to strengthen them. Mounted in the
bearings 20 of the yoke frame is a shaft 22 of the crusher roll 23 which is
supported above the crusher roll 8 and preferably to one side of the same, as
shown. Blocks 24 are inserted in the bearings of the yoke frame above the shaft
of the roll 23 and are retained therein with their concave faces against the shaft by
means of bolts 25 which pass through holes in the upper ends of the yoke frame
and the blocks. These means provide a very strong and substantial bearing.
To prevent sudden jarring of the upper roll while the ore is passing between it
and the lower roll I provide buffers. These buffers comprise rods 26 which pass

page_text: through holes 27 in the base of the hollow yoke and through the bed plates of the
frame, Springs 28 are confined between adjusting nuts 29 on the upper ends of
the rods and the bottom of the yoke frame. To prevent vertical movement of the
rods form them with shoulders 30 on the top surface of the bed pieces and insert
pins 31 through holes in their extreme lower ends. These springs also serve to
increase the pressure of the roll on the ore.
32 denotes a feed hopper the bottom of which opens directly above the point
where the rolls contact.
Having thus described the construction of my invention I will now proceed to
set forth its operation.
The ore to be crushed is supplied to the hopper in any desired manner and passes
out through its bottom directly between the upper and lower rolls between which
it passes and is crushed. Should particularly hard or flinty rocks be fed to the
rolls the upper one will raise and allow them to pass without injury to the machine
while its buffers will reduce to a minimum the jarring incident to machines of this
character.
Although I have shown the upper roll supported to one side of the lower
roll I would have it understood that I do not wish to be confined to such an
arrangement but prefer the same in that it permits of the ore being more readily
fed to the rolls.
From the foregoing description taken in connection with the accompanying
drawings the operation and advantages of my invention will be readily understood.
The machine is strong in construction, the parts are compactly assembled and are
not liable to become broken or get out of order.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. In an ore crushing machine, the combination with the main frame provided
with guides, of a crusher roll journaled in the main frame, a yoke frame mounted
to slide between said guides, a crusher roll journaled in the yoke frame above the
first named crusher roll, blocks seated in the bearings of said yoke frame and
having their concave faces bearing against the axis of the upper roll, and cross
bolts for securing said blocks in position, substantially as set forth.
2. In an ore crushing machine, the combination with a main frame provided
with vertical guides and a hollow yoke frame mounted to slide between said
guides, of a crusher roll journaled in the main frame, a crusher roll journaled
in the yoke frame, rods secured to the main frame against vertical movement
and projecting upwardly into the yoke frame and springs located in said yoke
frame and confined between the upper end of said rod and the bottom of the yoke
frame.
3. In an ore crushing machine, the combination with the main frame having
U-shaped extensions provided with journaled bearings, a roll having its shaft
seated in said bearings, journal caps and set screws for clapping them around said
shaft, blocks seated in said extensions with one end against the shoe and projecting
forward, cars formed on the frame above and below the extensions, bolts passed
through apertures in the ears and block and a vertically movable roll supported
above said first named roll.
Dated this 19th I 1 1000
W. P. THOMPSON & Co.,
31, High Holborn, London, W.C., Patent Agents for the Applicant.