inviolability device for the edges of the operation of the posts or openings of a fire and post of a fire, the mouth of a fire and trunk of the post of a fire thus teams

摘要

Locking of the mechanism is achieved by introducing the device between the rotating actuation element and its support housing which is firmly connected to the body of the hydrant. The support housing is provided with at least one opening adapted to hold a permanent magnetic element (27) on the maximum diameter of the operating key. The element is protected by the stronger nonmagnetic sleeve (33) to resist attempts to forcibly actuate the mechanism.