Profile: John Bridge Sons, Inc. is a manufacturer of industrial power transmission and material handling equipments. Our products include screw conveyors, vertical screw elevators, bucket elevators, drag conveyor, shaftless screw conveyors, belt conveyors, inverters, motors, clutches and brakes. Our drag conveyors are used in a variety of applications including mining, agriculture, or any applications where the product is fragile, easily segregated or high in moisture content. Our CTRL a ultrasonic listening device is used for detecting flaws in mechanical devices, and detecting leaks in hydraulic & pneumatic equipment.