Annuciator
Description:
Patent for an annunciator. "This invention is designed for use in connection with a complete traction system" (lines 13-14). The design drives instruments via a train air system so that air pressure is constantly maintained. Illustrations included.
Date:
February 18, 1908
Creator:
Mayo, William C.; Houlehan, John & Briggs, George E.
Item Type:
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Partner:
UNT Libraries Government Documents Department