PIPE OR BEAM MOUNTED RODENT TRAP
A snap trap that ties itself to a pipe.
A cable tie passes through openings in both side walls of the trap's base, beneath the trigger, and loops around a pipe or beam. The trap is set by pressing down on the plastic upper jaw while it remains tied in place, including overhead. A rodent traveling along the pipe depresses the trigger; the catch releases and the spring closes the jaw on the base. The trap is then opened, the rodent extracted, and the trap reset without untying it from the pipe.
“Because the plastic upper jaw provides a wide gripping area, and because the trap may be safely set by pressing on the upper jaw, the trap is readily moved into the set position while it is secured to the support member, even if in an overhead position.”— Daniel C. Johnson, from the specification
And the world did not beat a path to his door.