ANIMAL TRAP
Provides a separate execution box for animals attempting to leave.
The animal enters the casing and steps on a pivoted treadle, which lifts a yoke clear of a locking plate. A coil spring then pulls a tripping plate rearward, releasing the bar that holds the vertical door, and the door drops by gravity to close the entrance. A hinged gate simultaneously swings shut over the bait box, and a locking bar overhangs the closed door to prevent it from being raised. If the confined animal then pushes its head through the inward-swinging doors of the rear execution box and attempts to back out, the spring-tensioned doors clamp its neck and choke it.
“A further object of this invention is the production of a simple and efficient means for executing the animal when the animal makes an attempt to leave the trap.”— Robert C. Burnley, from the specification
And the world did not beat a path to his door.