SPINA PIOMBATA

• Main Authors: UBERLEE SYLVIA, TURCZYNSKY PETRA KRUMME
• Format: Patent
• Language: Italian
• Published: 02.07.1981
• Edition: 3
• Subjects: BASIC ELECTRIC ELEMENTS; CURRENT COLLECTORS; ELECTRICITY; LINE CONNECTORS

The plug for telecommunications circuit junction box connections contains a locking bolt (1) which is displaced when the plug is inserted into the junction box. The bolt can only then be unlocked after a sealing plug engaged inside the bolt release button is broken. The sealing plug consists of a tablet which fits hollow depression in the push button. The tablet is held in place by flexible retaining hooks which lock against the inside surface of the button. The inside end of the seal rests against the nearby fixing post which holds the plug cover in place. When the seal is properly inserted it is flush with the top of the release button. The tablet of the sealing plug contains a rupture zone. The locking bolt is held against a compression spring and prevents accidental withdrawal of the plug from the junction box. The bolt can only be released by perforating the seal and leaving evidence of any unauthorised removal. The broken seal is easily replaced without the need for any special tools.