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Self-Dumping Cage for Hoisting Coal, & c., from Mines.
Patent for improvements in self-dumping cage for hoisting coal or other minerals by first provide a simple and easily-controlled dumping mechanism which can be set at bottom of shaft; second, to secure a positive action of the dumping mechanism and reduce the shock and strain commonly incident to the operation of self-dumping cages; third, to provide a firmer and more easily operated dog for holding car on cage-platform. (Lines 15-22) Illustration is included.
Date:
June 25, 1901
Creator:
Burdic, Malvern W.
System:
The Portal to Texas History