Hoisting: Coal and Metal and Nonmetal Entry Level Training, Volume 2National Mine Health and Safety Academy, 1995 - Mine hoisting |
From inside the book
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Page 9
... stop signal is given . Semiautomatic - Similar to automatic control , except that the hoist stops at the end of each cycle and is then started again by pushbutton . Manual - Requires a hoist operator at all times . He or she manually ...
... stop signal is given . Semiautomatic - Similar to automatic control , except that the hoist stops at the end of each cycle and is then started again by pushbutton . Manual - Requires a hoist operator at all times . He or she manually ...
Page 76
... stop is preceded by a " crawl " period at a speed of one or two feet / sec . Even if the " final stop " signal is given a little ahead of time to allow for brake sluggishness , variations in load will lead to considerable variations in ...
... stop is preceded by a " crawl " period at a speed of one or two feet / sec . Even if the " final stop " signal is given a little ahead of time to allow for brake sluggishness , variations in load will lead to considerable variations in ...
Page 134
... stop . Oil - filled buffers with spring return protect against overwind . They are placed at the bottom of the shaft . If either the car or the counterweight comes into contact with the buffers , rope traction on the drive sheaves will stop ...
... stop . Oil - filled buffers with spring return protect against overwind . They are placed at the bottom of the shaft . If either the car or the counterweight comes into contact with the buffers , rope traction on the drive sheaves will stop ...
Common terms and phrases
abrasion adjusted aircraft cable ammeter applied automatic brakeman broken wires buckets cage centrifugal switches circuit breaker clearance clips compartment conveyance core wire rope counterweight deadman switch deceleration devices disc brakes DRUM BRAKE dump electrical elevators end attachment equipment fatigue resistance feet fiber core wire filler wire flange flattened strand fleet angle flyball friction hoists galvanized gauge groove haulage head sheave headframe hoist controls hoist drum hoist operator hoist rope hoisting system hydraulic improved plow steel inch indicator inspection installed IWRC rope Koepe hoists lay length layer LIVE END load lubrication mantrips maximum minimum nominal strength nondestructive tests operating mechanism overtravel personnel plastic filament polypropylene Regular Lay rope construction rope diameter rope lengths rope strength rotation safety catches safety dog Seale seizing signal skip slack slope socket spelter stop swaged switch thimble trip-out Warrington wear wedge weight wheel wire rope zinc