Patent Model - Improvement in Rock-Drills
Maker and role
Uriah Cummings, Patentee
Uriah Cummings, Assignee
Arthur White, Assignee
Nov 26 1878
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13 x 9 x 6" (33 x 22.9 x 15.2cm)
Cummings's patent provides "a rock-drill that may be operated effectively and continuously by hand-power without unduly tiring the operator. His "invention consists in a drill propelled by a spring that is compressed by two hand-levers geared together, so as to move in opposite directions, and carrying pawls which alternately lift the drill." (Patent Number 210,189)
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