Switch chain wear indicator

grabcad

This simple proposal consist of a simple mobile plastic glove, which the dimensions (radii) will control the minimal and maximal range for the chain, if the the chain wear, it miss the accommodation on the pulley causing a increase of the external diameter over the chain and compress the plastic glove and press the switch, witch can turn on a buzzer or a light to show the minor limit were reached. The size of the chain will define the dimension of the parts but the the screws, springs and switch can be standard and just the manufacturing of the glove (plastic)to chain and the base (aluminum, plastic or other metallic material). Important thing is make the center the system precisely with the center of the chain's pulley