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Drill.

Description: Patent for a drill especially adapted for use in rock and earth formations. The drill has a number of separate cutters that are secured onto a head and detachable, which gives the tool many advantages.
Date: November 4, 1913
Creator: Weathersby, Fred Richard
Item Type: Refine your search to only Patent

Winding Drum

Description: Patent for an improved winding drum. This uses a different type of adjustable cam that allows for less oscillation and better control of winding and unwinding the cable.
Date: November 25, 1913
Creator: Voight, Phillip H. & Kuehne, Oscar C
Item Type: Refine your search to only Patent
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