UNT Libraries Government Documents Department - 6 Matching Results

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Patent for an automobile wheel. Illustrations included.
Patent for a reamer with a hexagonal shaped body and shell, central hub, a series of plates, springs, and metal dogs. Used for reaming well drilling tubes, which are used to drill artesian wells and deep water, and for cleaning out the reamer's own interior.
Patent for a trap for catching small animals and insects. Illustrations included.
Patent for an insect trap that attracts insects with a light.
Patent for a trap for insects such as those that feed upon crops including instructions and illustrations.
Equilibrium-Retaining Device for Flying-Machines.
Patent related to automatic means for maintaining equilibrium while operating heavier-than-air flying machines through the use of valves.