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Improvement in Portable Houses.

Description: Patent for improvements in the construction of portable wooden houses, including instructions and illustrations.
Date: January 8, 1878
Creator: Boyd, John
Partner: UNT Libraries Government Documents Department

Changeable Gearing.

Description: Patent for changeable gearing by using an axle, bevel-gears, stub-shafts and a crank-axle to construct the changeable gear, so that the “sprocket is locked to rotate with the crank-axle in one direction, while it may rotate freely of the axle in opposite direction, and, furthermore, that the sprocket may be locked to rotate with the axle or may be caused to rotate at a higher-speed than the axle.” (Lines 8-14.) Illustration is included.
Date: January 8, 1901
Creator: Brady, Alford
Partner: UNT Libraries Government Documents Department
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