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Insect Trap.

Description: Patent for a new and improved ant trap. This design calls for a box to be placed over the mouth of an anthill, whereupon one expects the ants to enter a hole, climb an incline, and slip down a pair of glass pieces that lower the ants into an inescapable chamber. This design is cheaper and easier to make than previous ant traps.
Date: May 24, 1881
Creator: Blackwood, Curtis
Item Type: Refine your search to only Patent

Permutation Lock.

Description: Patent for a new and improved combination lock. This design "consists in the construction and novel arrangement of the elongated case, its longitudinally slotted and notched partitions, the boltway over the partitions, reciprocating notched and perforated slides, and adjustable pins or studs engaging the perforations and projecting into the slots of the partitions, the rack-slide, drop-bolt, and graduated knob carrying the pinion" (lines 20-28).
Date: April 24, 1883
Creator: Sarlls, Rutus & Holland, Virgil C.
Item Type: Refine your search to only Patent
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