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Telephone Socket Safety Shield Disclosure Number: IPCOM000057512D
Original Publication Date: 1988-May-01
Included in the Prior Art Database: 2005-Feb-15

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Related People

Hall, AE Poleschuk, NA Wiseman, JA [+details]


This article describes a safety shield to cover the exposed face of a British Telecom (BT) telephone socket when built into interfacing equipment requiring public network connection. The shield protects the user from voltages (100 RMS and 50V DC) exposed on the socket, yet allows easy connection of a telephone handset. The main features of this design are a transparent shutter with a shaped aperture to fit the profile of a BT plug; the plug is used as a key to unlock the shutter and raise it to the entry position for plugging. When the plug is withdrawn from the socket, the shutter snaps shut and locks. The transparent shutter allows the user to see the socket and assists orientation and insertion of the plug.