UNT Libraries Government Documents Department - 5 Matching Results

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Animal-Trap.: Patent for an animal trap meant to trap animals that burrow in the ground, such as prairie dogs. The trap catches the animal when it leaves its den and the animal cannot escape the trap.
Gripper for Printing-Presses: Patent for a gripper for printing presses designed to hold the paper during printing more effectively. Illustrations included.
Lifeboat: Patent for a lifeboat that "prevents the boat from capsizing" (lines 19-20) or sinking.
Marker.: Patent for improvement in markers "used in filing and card index cabinets" (lines 6-7).Meant to "provide a light, simply constructed V-shaped device" (lines 11-13), to mark the location of papers or files that have been temporarily moved from a filing system.
Pump-Filter.: Patent for a pump filter, designed for double acting air pumps, that prevents the passage of foreign matter (oil, dust, dirt) from the pump outlet.