Moisture-sealed telephone or intercom speech unit - has switch operated by movable magnet outside sealed housing

摘要

The housing (1) has an outer casing (2) directed towards the uses side and sealed at least against moisture. Switch buttons operate by moving a permanent magnet (6) on one side of the casing relative to a magnetically operated switch (4) on the other side of the casing. In a telephone supplied for the network, there may be a magnet on the handset and a switch in the base part to operate the cradle switch. A further magnet system may hold the handset onto the base. Pref. feed relays. USE - Telephone and bathroom or other wet or hazardous places.