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US Patent: 88,833
Improvement in Carpenters' Gauge
Gage for Marking Bevels or Curves
T. E. Barrow - Mansfield, OH

USPTO Classifications:

Tool Categories:
layout tools : marking gauges : bevel marking gauges


Not known to have been produced

Chas. Barrow
Henry Weltz
Wm. A. Morgan
G. C. Cotton

Patent Dates:
Granted: Apr. 13, 1869

Patent Pictures:
USPTO pdf tiff
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Here's a real gadget. Not only can this gage mark off bevelled edges, it has an flexible fence to follow any curved edge, bevelled or straight!

The pivoting design is here is pretty unusual, in that it uses a split rod with the pivot point for the head running in this slot. This means that tightening a single screw will lock both the angle of the head and its position. This is quite a clever idea-- it seems like it would hold well, but would probably be a pain to adjust.

This gage also is the first to sport a flexible fence, which can be adjusted to match the curvature of the reference edge. It works much like a typical metal compass plane, using a flexible steel plate attached to adjustment screws at the edge.

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