Adding-Machine. (open access)

Adding-Machine.

Patent for an inexpensive, simple, easily operated, and improved registering machine that is meant to add numbers without mistakes. It uses revoluble number wheels and a spring-returned shaft among other materials.
Date: March 21, 1893
Creator: Brooks, Augustus J.
System: The Portal to Texas History
Extension-Brace for Ladders. (open access)

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