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in creator/contributor: "Crews, Dayton H."  
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Extension-Ladder.

Description: Patent for improvements in extension ladder by using two sliding ladder sections, "these two sections can be secured by a windlass and a hook detachably bolted to the upper rung of the upper section." (Lines 38-40, p.3) Illustration is included.
Date: November 3, 1891
Creator: Crews, Dayton H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Extension-Brace for Ladders.

Description: Patent for an extension brace for ladders that improves on the inventor's previous patent (No. 416,413). The invention's parts "are positively raised and lowered by means of direct acting mechanism which is so constructed and arranged as to obtain the most beneficial results from a comparatively small application of power, the parts being strong and durable easily operated and readily understood" (lines 20-26).
Date: April 11, 1893
Creator: Crews, Dayton H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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