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Refrigerator
Patent for a refrigerator made of wood with an inner shell of reinforced concrete and vacuum chamber or metal jacket. "The inner concrete shell is divided into four separate chambers, the former containing ice and the other three being adapted to contain food." (lines 61-64)
Date:
April 11, 1922
Creator:
Knutson, William K.
System:
The Portal to Texas History
Extension-Brace for Ladders.
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.
System:
The Portal to Texas History