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in subjects: "Science and Technology - Tools"  
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Gate or Door Closing Device

Description: Patent for "improvements in closing devices for doors, gates, and the like" (lines 12-13) using a spring connected to the door and frame, including illustrations.
Date: June 26, 1917
Creator: Hawley, Royal A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Spring-Wheel.

Description: Patent for improvements to vehicle spring wheels to replace pneumatic wheels, "embodying in its use relatively movable members having coil springs interposed therebetween whereby to secure the proper resilience" (lines 13-16) necessitating very few parts, including illustrations.
Date: October 4, 1921
Creator: Bush, Horace L. & Bryan, Andrew J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

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

Boiler-Cleaner

Description: Patent for an appliance to clean boilers. Device remains in boiler and sucks dirt particles out.
Date: January 1, 1918
Creator: Cross, William G.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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