Interconnector for adapting existing telephone outlets to plug-in outlets

A common interconnector for adapting either of two forms of existing telephone outlets for telephone sets, the outlets each having screw terminals for attachment of conductors of the telephone system and the telephone sets connected to the outlets by plugs having a number of pins or by direct wiring to said terminals, said interconnector adapting said outlets to a form having a profiled aperture for accepting a profiled plug of a plug-in telephone unit and comprising:

• a flat square main member having two opposed parallel surfaces;
• a central boss extending from one of said parallel surfaces and a bore through said central boss;
• four radially extending spring contact members on said one surface, said spring contact members extending from said central boss towards the corners of said main member, said contact members attached to said main member at their inner ends adjacent to said boss and including outer ends adjacent the corners of the main member and spaced from said one surface, said outer ends positioned to contact said screw terminals in said existing outlets when said main member is positioned on either of said two forms of existing outlet;
• formations on said one surface, said formations comprising a formation at each edge of the main member, each formation of unique form and differing from the other of said formations, and adapted to interengage with existing formations at the periphery of the existing outlets, to provide a predetermined rotational relationship between the main member and the existing outlets independent of the particular one of said two existing outlets;
• means for attaching said main member to an outlet;
• a hollow snap-on cover fitting over said main member, said cover of rectangular form having four sides, three sides form a close fit over three sides of said main member, a transverse wall extending laterally across the interior of the cover, said transverse wall forms a close fit over the fourth side of said main member, said cover extending beyond said main member to form an extension bounded by a fourth side of said cover;
• a jack positioned in said extension, said jack including contacts connected to said spring contacts on said main member;
• and
• an aperture in said fourth side of said cover, said aperture having a predetermined profile for acceptance of a profiled plug therein, said aperture aligned with said jack to permit the spring contacts on said plug to engage said contacts in said jack.