4 Matching Results

Search Results

Advanced search parameters have been applied.

Hoisting-Machine

Description: Patent for a new Hoisting-Machine. The Hoisting Machine has improved arrangement of parts that control the device's braking drum. Improving the Hoisting Machine construction is useful for reducing wear on the machine.
Date: May 21, 1912
Creator: Johnston, Horace
Partner: UNT Libraries Government Documents Department

Hydraulic Drill

Description: Patent for a hydraulic drill that allows drill bits to be easily inserted and removed and locks them in place when inside the drill.
Date: May 21, 1907
Creator: Charlton, James
Partner: UNT Libraries Government Documents Department