Resource Type

Month

Automatic Valve (open access)

Automatic Valve

Patent for an automatic valve, "designed to automatically control the water-supply to a suitable reservoir through the operation of a float (lines 9-11), with illustrations.
Date: April 25, 1905
Creator: Pinkerton, Henry S.
System: The Portal to Texas History
Shovel. (open access)

Shovel.

Patent for a shovel, which has a detachable blade and handle that can be securely fastened when in use and easily taken apart for transport.
Date: April 7, 1908
Creator: Ellison, John Wesley
System: The Portal to Texas History