Abstract: An air freshener device, comprising a container with porous ceramic walls defining a closed internal space, a closure member for selectively permitting access to and sealing the internal space, and a replaceable absorbent pad the absorbent pad being impregnated with a fragrant substance adapted for insertion into the internal space so as to occupy only a portion thereof and release fragrant vapors into the internal space at a controlled rate. The released fragrant vapors first build up within the internal space and then diffuse through the porous walls of the container for release into the atmosphere.

Abstract: A method and structure for automatically stopping a train riding on a railroad track should at least one wheel of the train go off of the track. The train has a conventional pneumatic brake line, with which a cutting arrangement is operatively associated for actuation should one wheel of the train go off the track, the severing of the pneumatic brake line allowing release of air so as to gradually apply the brakes and ultimately stop the train.