ASME — EIMCO Rocker Shovel Loader, Model 12B Landmark
source confidence: High status: Useful updated 2026-06-25
Summary
The ASME Historic Mechanical Engineering Landmark designation for the EIMCO Model 12B Rocker Shovel Loader, with the landmark example located in Park City, Utah. The designation page and associated brochure credit EIMCO Corporation of Salt Lake City and describe the machine's significance in mechanizing underground hard-rock mining.
Useful Claims
- ASME designates the Model 12B as the first successful mining device to replace human labor in removing rubble from underground hard-rock blasting
- The machine was manufactured by EIMCO Corporation in Salt Lake City
- The landmark example is in Park City, Utah
- The rocker-shovel mechanism used compressed air and a bucket-on-rocker-arms design
- About 29,000 units sold by 1969, with licensed manufacturing in Great Britain, India, South Africa, and Japan
Verbatim
"First successful mining device to replace human labor in removing the rubble from underground hard-rock blasting" — Landmark description
"In 1931, Joseph Rosenblatt of EIMCO, Salt Lake City, met Royle and Findlay, and shortly thereafter, Royle joined EIMCO as a consultant and designer." — Landmark history
"Manufacturing rights were licensed to companies in Great Britain, India, South Africa and Japan." — Landmark history
"By 1969, 29,000 loaders had been sold." — Landmark history
"Park City, Utah" — Landmark location
Reliability Notes
ASME landmark designations are peer-reviewed by engineering historians and represent authoritative professional recognition. High reliability for factual claims about the machine's significance and commercial reach.