The White Pine news. [volume] (Ely, Nev.) 1906-1910, 1907-10-18
ORDERS u REEL HOSTS
FOR HAULING ORE QUICKLY
Electric Elevators of Different Sizes
Being Built in Cleveland for
Mexico Mining Company.

Twelve electric reel hoists of va
rious sizes have been designed and
built in Cleveland, Ohio, for the Com
pania de Real del Monte, Pachuca,
Mexico. One of these hoists is OPP
Grated by means of double reduc-
tion of gears by an alternating cur
rent motor, and is designed to handle
load consisting of 1000 pounds of
ore, double deck cages weighing A.
900 pounds and cars weighing 1900
pounds from depth of 2,400 feet,
at a speed of 1000 feet a minute,
the ascending load being balanced by
the descending cages The hoist is
supported on a cast iron bed plate
of the inverted-U type, hollow in Sec
ton and surrounding the entire ma
chine.
The reel shaft rests in adjustable
babitted bearings. Each reel has a
capacity of 2,400 feet of a " by q
inch rope, and is fitted with friction
clutch and post brake. The reel hubs
are lined with removable bronze
bushings, which have a projected
area giving pressure of not over 80
pounds per square inch for the max
imum load to which each is subject
plates and angles and are provided
with suitable adjustments. The
brakes are lined with Eastwood
blocks, which under the maximum
loads are subjected to a pressure not
exceeding 20 pounds per square inch.
Both clutches and brakes are operat-
ed by compressed air, the operating
cylinders being fitted with floating
valve gear, so arranged that the pis-
tons follow the movement of the con-
trolling levers.
The brakes are set by gravity and
released by air pressure. In addition
to the power operated brakes, there
are brakes controlled by hand wheels,
to be used in case the air pressure
fails. The hoist is fitted with safe
ty device operated from the indicator
and so arranged that if the cages are
hoisted beyond given point the
clutches are automatically thrown
out and the brakes are set. This au-
tomato device is also connected to
the hand-operated mechanism. Each
reel is fitted with an Indicator driven
from the reel hub by bicycle chain
and sprockets. All gears on the hoiet
HAYS cut teeth of the short involute
type.
The electrical equipment consists
of $50 horsepower. 429 revolutions
per minute, 1,040 volt motor, having
a full load efficiency of 90 per cent.
The full load torque of the motor is
1000 pounds at one foot radius, and
the maximum torque is approximate
ly 2R times that amount. The insu-
lation is tested to withstand 5000
volts alternating current for one min
ute, and the temperature will not ex-
coed 40 degrees centigrade at rated
capacity after "a hours run. The
controller is provided with primary
contacts, operating in oil, inclosed in
cast iron case, separate from the
main controlling mechanism.
There are six running points, enab-
ling the operator to run at several
speeds continually.
Another of the hoists is designed
to handle a load consisting of 1000
pounds of ore in a skip weighing g
900 pounds from a depth of 1900
feet at a speed of 500 feet per min
ute. The electrical equipment con-
sists of a sixty-horsepower, 600 revo-
1utions per minute, 1,040 volt meter,
having full load efficiency of sc per
cent. The full load torque of the
motor is 525 pounds at one foot ra-
dius.--New York Commercial.