Semaphore.
Description:
Patent for a semaphore with an enclosure for the operating gearing in signaling devices for railway trains. It incloses the operating gearing so that ice does not interfere with its operation and water does not touch the gearing.
Date:
January 16, 1912
Creator:
Van Zandt, Luther H.
Item Type:
Refine your search to only
Patent
Partner:
UNT Libraries Government Documents Department