fig . 1 shows the adjustable indicating device that is adapted to be mounted to the plate defining a load compartment . the device has a central housing with two wing structures on each side which support conventional switch means having cantilevered arms . extending through the housing is a movable shaft that is spring biased to a forward extended position and adapted to respond against a load being positioned . the read end of the movable shaft has an adjustable cam means which acts upon the cantilevered arms to cause a switching action upon shifting of the movable shaft by a load .