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MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Jerome in Yavapai County, Arizona — The American Mountains (Southwest)
 

Rocket Shovel and Dragline

 
 
Rocket Shovel and Dragline Marker image. Click for full size.
By Denise Boose, September 30, 2017
1. Rocket Shovel and Dragline Marker
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.
 
Erected by Jerome Historical Society.
 
Topics. This historical marker is listed in this topic list: Natural Resources. A significant historical year for this entry is 1938.
 
Location. 34° 45.004′ N, 112° 6.462′ W. Marker is in Jerome, Arizona, in Yavapai
Rocket Shovel and Dragline Marker image. Click for full size.
By Denise Boose, September 30, 2017
2. Rocket Shovel and Dragline Marker
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County. Marker is on Hampshire Avenue (Arizona Route A89). Touch for map. Marker is in this post office area: Jerome AZ 86331, United States of America. Touch for directions.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Jerome, Arizona (a few steps from this marker); The Arizona Republic (within shouting distance of this marker); Main Street Primary School (approx. 0.3 miles away); The Gibson Market (approx. 0.3 miles away); The Childs-Irving Project - Construction Challenges (approx. 0.4 miles away); The Irving Turbine and Generator (approx. 0.4 miles away); The Childs-Irving Project-Hydroelectric Project (approx. 0.4 miles away); The Audrey Shaft and UVX Operations (approx. 0.4 miles away). Touch for a list and map of all markers in Jerome.
 
Rocket Shovel and Dragline image. Click for full size.
By Denise Boose, September 30, 2017
3. Rocket Shovel and Dragline
Rocket Shovel and Dragline image. Click for full size.
By Denise Boose, September 30, 2017
4. Rocket Shovel and Dragline
 
 
Credits. This page was last revised on September 4, 2018. It was originally submitted on September 3, 2018, by Denise Boose of Tehachapi, California. This page has been viewed 227 times since then and 13 times this year. Photos:   1, 2, 3, 4. submitted on September 3, 2018, by Denise Boose of Tehachapi, California. • Syd Whittle was the editor who published this page.

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Oct. 25, 2021