Rocket Shovel and Dragline

Rocket Shovel and Dragline (HM2B4H)

Location: Clarkdale, AZ 86324 Yavapai County
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Country: United States of America
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N 34° 45.004', W 112° 6.462'

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Inscription
This piece of equipment was the first successful mining device to replace human labor in removing the rubble from underground hard rock-blasting. The Model 12B, which weighs 4,200 pounds and requires 60 to 125 pounds-per-square-inch air pressure, was first introduced in 1938. When the bucket is loaded with rubble, the operator actuates the bucket drive motor to exert force on the rocker pull chain, which is attached near the outer end of the rocker arms. The rocker arms roll the bucket upward toward the rear of the machine so that it maximizes the initial lift force on the bucket. As the bucket is thrown rearward, its vertical velocity decreases, and it's horizontal velocity increases until the rocker arms strike shock-absorbing stops on the frame. When the bucket stops, the contents are flung into an attached mine car.
Details
HM NumberHM2B4H
Tags
Placed ByJerome Historical Society
Marker ConditionNo reports yet
Date Added Tuesday, September 4th, 2018 at 11:01am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)12S E 398611 N 3845885
Decimal Degrees34.75006667, -112.10770000
Degrees and Decimal MinutesN 34° 45.004', W 112° 6.462'
Degrees, Minutes and Seconds34° 45' 0.23999999999987" N, 112° 6' 27.72" W
Driving DirectionsGoogle Maps
Area Code(s)928
Closest Postal AddressAt or near 819 Hampshire Ave, Clarkdale AZ 86324, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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