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Tool for Truing and Dressing Commutators.
Patent for a tool "for truing and dressing the commutators of dynamo motors... especially designed for truing and dressing the commutators of motors employed for propelling cars" (lines 9-14).
Date:
June 25, 1907
Creator:
Frick, Claus Henry
System:
The Portal to Texas History
Revolving Case and Account Register
Patent for revolving case and cash register. This device is designed as an account system and provides customers with and account book for keeping records. Illustrations included.
Date:
June 25, 1912
Creator:
Trenton, Albert E.
System:
The Portal to Texas History
Railroad-Rail
Patent for a new railroad rail design. Illustrations included.
Date:
June 25, 1907
Creator:
King, Alphonse
System:
The Portal to Texas History
Door Operating Means
Patent for a mechanism to operate jail doors. The mechanism is "operated with a single movement of the hand to open and close a plurality of doors simultaneously" (14-19). Illustrations included.
Date:
June 25, 1912
Creator:
Youngblood, David Franklin
System:
The Portal to Texas History