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Telephone System.
Patent for improvements to an automatic switchboard "to provide a construction of board and a connected system of wiring which will permit a subscriber at a telephone in one town to call up the operator or central at a distant point and converse with him without operating the other instruments in his town and at the same time preventing other subscribers from breaking into the line" (lines 12-20).
Date:
December 23, 1902
Creator:
Wright, Wayne C.
System:
The Portal to Texas History
Pile Structure.
Patent for piling structures used in bridges and other structures built in sandy areas that allows for digging the piling hole to any depth desired and prevents cave-ins of the interior of the piling before it is filled with concrete.
Date:
April 23, 1907
Creator:
Pyle, Jesse Theodor
System:
The Portal to Texas History