Wood River times. [volume] (Hailey, Idaho) 1882-1915, 1888-04-26

and by pulling slide, either Of them
can be discharged into the cars.
AT the upper end of the table is the
shaft, or each end Of which is an &C.
centric, having a thrust of exactly 2 |
inches. Connecting rods run along
each side OF the table and connect
with it 6 feet from the end. A fixed
pulley on the shaft gives motion 10
the table; another pulley runs loose
on the shaft and has pin clutch con.
Meeting with the spocket- wheel which
carries the elevator. The lower end
OF the table strikes two heavy rubber
buffers on the downward stroke for the
double purpose of easing the motion
and jarring the ore along over the
table. The table is set at an inclina.
ton Of l to 8, and the motion is 200
oscillations per minute. The elevator
is run at 6 revolutions per minute.
Above the screen, at the upper end
of the table, is fixed a Pinch water
pipe with row of ! inch holes on
each side, for the purpose of washing
the ore as it passes along underneath.
On the floor of the building, and d.
rectly under the screen, is arranged Il
tank 6 feet wide and feet long, with
sides 2 feet high. A large sheet iron,
lined spout directs the water and fine
ore passing through the screen into
this tank. A platform extends along
each side of the table for the men or
boys to stand upon. In working the
table the crushed ore is delivered by
the elevator on to the screen at the
upper end, and is washed BY the
water jets. The fine stuff goes through
the screen into the tank below, while
the coarse ore travels along by sue
cessive bitches towards the lower end
of the table. Boys stand on either
side, their fingers protected by steel
thimbles, and sort the ore as it passes
along. Waste rock goes into the first
trough on each side; the other troughs
carry, respectively, galena, copper
and zinc, while the now thoroughly
cleaned pyrites continue on down
the central shoot. A bright boy will
learn to sort in week, and will in a
short time become surprising y ex
pert at the business. The number of
boys worked at the table varies &C.
cording to the class Of ores; as many as
10 can work at the table, but we rare
ly work more than four or FIVE.
The amount of ore which can be
handled on this table depends upon
its quality, It half rock and half ore.
5 tons per hour will be good work
with cleaner ores, S or even 10 tons
per hour have been run. Our daily
average for 10 hours has been, on
years runs rs to so tons. The say
ing resulting over the old hand meth
cd is enormous. Where it cost US -
cents per ton by hand work to break
and sort, the crusher and automatic
table brought the cost down to Il
cents per ton. The saving in hand
ling is very great. Through the use
of the table, the ore is not handled
again after it is thrown into the
crusher; its movement is automatic
until it is finally dumped into the
tram-cars. The fine stuff which passes
through the screen is considerably
concentrated, since the constantly
overlooking water washes out all the
lighter rock. 1t is, however, very
, easy to rig up simple jig under thu
screen and make frst. class concen
tration; or, in case Of fine silver ores
an endless belt can be used, simila
to tho Frue vanner.
After using this arrangement TO
five years, and handling upon it thous
Z ands and thousands of tons of ore,
am convinced that it is not only al
, economical method, but a good one
p and applicable to many classes of ore
r There may be something similar to
e in use, perhaps something better; Blu
: if so, am not aware of it. 1t wa
j. simply a product OF necessity will
4 US, and was got up, not to "fill long
felt want" of the art generally, but t.
y assist in producing cheaper and quick
or work at our particular mine.
!. After various trials it was fonn'
! that the only thing suitable for screen