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Chicago Rivet & Machine Co is in the fastener industry in North America. The company operates in two segments namely fasteners and assembly equipment. Its fastener segment consists of the manufacture and sale of rivets, cold-formed fasteners, parts, and screw machine products. The assembly equipment segment consists mainly of the manufacture of automatic rivet setting machines, automatic assembly equipment, and parts and tools for such machines. The majority of revenue is from the fastener segment. Geographically, the majority is from the United States.
Electro-Sensors Inc is engaged in manufacturing and selling a variety of monitoring systems that measure actual machine production and operation rates, as well as systems that regulate the speed of related machines in production processes. Its speed monitoring systems compare revolutions per minute or speed against acceptable rates as determined by a customer. It also includes a line of products that measure production counts or rates, such as parts, gallons, or board feet, alarm systems, tachometers, and other devices that translate impulses from the sensors into alarm signals, computer inputs, or digital displays that are usable by the customer.