UNT Libraries Government Documents Department - 4 Matching Results

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Electric Fly-Trap.

Description: Patent for improvement to fly traps. The improved fly trap electrocutes flies and other flying insects as they enter the trap. In the trap, there is a lamp that attracts flying insects.
Date: November 20, 1917
Creator: Bass, William A.
Item Type: Refine your search to only Patent

Cleburne Sheet

Description: Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:125000
Date: 1917
Creator: Geological Survey (U.S.)
Item Type: Refine your search to only Map
Location: 32.25 -97.25

Time-Controlling Mechanism.

Description: Patent for new and useful Improvements in Time-Controlling Mechanism "designed more particularly for the automatic operation of electric switches, circuit closers, and the like" (lines 13-15), including illustrations and instructions. A main object of the invention is to provide a time controlling mechanism for alarm clocks to "intermittently operate the electric switch or other movable member at pre-determined intervals" (lines 19-21).
Date: August 28, 1917
Creator: Gerdes, Herman Henry.
Item Type: Refine your search to only Patent
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