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US Patent: 569,739
Carpenter's Gage
Patentee:
Richard Bates - Bloomsburg, PA

USPTO Classifications:
33/43

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Wm. F. Bodine
G. M. Quick
Milton O'Connell
R. M. Smith

Patent Dates:
Applied: Feb. 29, 1896
Granted: Oct. 20, 1896

Patent Pictures: [ 1 | 2 ]
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Description:
The Bates Patent gage is the most famous of the gages designed to mark off bevelled edges. It uses a head that can tilt up to about 45 degrees, as well as two fixed and one adjustable "gage lugs" which can be used to register off curved surfaces.

The adjustable face on this gage works quite well, which explains why these were so (relatively) popular. The adjustable lug for marking curves is also a cool idea, but appears to have had one big problem-- the adjustable lug was too easy to lose. You need to completely remove the head in order to flip the bar over to change from a bevel marker to a curved edge marker, which left the adjustable lug loose. It is almost always found missing on old examples.

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