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US Patent: 167,311
Improvement in Bench-Planes
Patentee:
Leonard L. Davis (exact or similar names) - Springfield, MA

USPTO Classifications:
30/489, 30/490

Tool Categories:
woodworking tools : planes : plane adjustment mechanisms
woodworking tools : planes : plane adjustment mechanisms : plane cutter adjustments
woodworking tools : planes : plane adjustment mechanisms : plane throat adjustments

Assignees:
None

Manufacturer:
The Davis Level & Tool Co. - Springfield, MA

Witnesses:
C. E. Buckland
S. P. Hollingsworth
T. A. Curtis

Patent Dates:
Applied: Mar. 03, 1875
Granted: Aug. 31, 1875

Patent Pictures: [ 1 | 2 | 3 | 4 | 5 ]
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Description:
This plane was made by the maker of the well-known Davis levels and inclinometers. The patent is for a set of cutter adjustments for bench planes. One is for a "wedge", which is a metal piece that fastens to the bed just behind the mouth and provides support for the lower end of the cutter, and is adjustable to change the mouth opening. Another is a crosspiece which serves as the upper support for the cutter. This crosspiece is adjustable and provides a way to change the bed angle of the cutter. The crosspiece has set screws on both ends which provide a means for lateral adjustment of the cutter.

According to PTAMPIA Volume 2 by Roger Smith, Davis planes were built with two styles of frogs. The earliest models featured a scalloped shaped bridge between the side rails. A cutter locking screw is in the center of the bridge and features the screw adjustment feature illustrated in the patent drawings. Later models featured a simplified frog with two round head screws, as shown in picture #4. These planes originally had a Moulson Brothers or Butcher cutter and cap iron.

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