Key-Operated Mechanical Interlocks or Trapped-Key Systems

http://www.Haake-Technik.com is a german manufacturer and supplier, among other things, of trapped-key interlocking systems. In this video a single-key door interlock is shown. Part-body access. To restart the machine, the key has to be returned. An integrated safety system contains elements like bolt interlocks, coded switches, door interlocks, interlocking systems, key exchange box / unit, key transfer systems, locking bolt, mechanical door interlocks, safe magnetic switches, or safety keys. Trapped key interlocks are applied to any form of equipment which may be operated by a human in industries like Automotive Industry, Chemical Industry, Robots, Pharmacy, Machine Tools, Plastic Processing, Automation, Oil / Gas, Packaging Machines, Steel, Food, Mining, Textile, Power Generation, Breweries, Environmental Protection, Building Industry. The aim is a safe sequence of operations. This will be achieved by transfer of keys that are either