Automatic Alarm Device
Description:
Patent for a spring motorized automatic alarm device with an improved tripping mechanism actuated by the medium of fire severing an actuator cord "or the like".
Date:
March 9, 1915
Creator:
Willoughby, Alford Pervis & Bolding, William D.
Item Type:
Refine your search to only
Patent
Partner:
UNT Libraries Government Documents Department