TRAP FOR ANIMALS
Seals the animal inside a spiked chamber for its own protection.
The animal enters between two curved sheet-metal sides held apart by a baited tripping hinge. Pulling the bait collapses the hinge past 180 degrees and releases it. Elastic bands then draw the two sides together, enclosing the animal in a closed chamber. Inward-pointing spikes at each end prevent the animal from escaping and prevent other animals from reaching it.
“A specific object of the present invention is to provide a means whereby the trapped animal is protected from other predators. Another specific object of the present invention is to provide a trapping means from which the animal cannot escape by chewing off or otherwise tearing off a limb.”— Edward J. Niemeyer, from the specification
And the world did not beat a path to his door.