hmmm ... use for our pet door ~ Gail ---"...to keep door closed ... make one from a spring rat trap," May 1927 issue. Saw off bait end of trap and screw remaining part to door casing. Protect adjacent surface with piece of tin. MORE: Screw a trap to a trailer to hold a warning flag when towing large objects - August 1932. Mount several traps to a workshop wall to clip items to - May 1954.