Embedded adapter for turntable

Claim 1

An adapter to permit the centering and playing of doughnut type disc records on a phonograph turntable including a central spindle and a recess in the turntable surrOunding the spindle, comprising: a supporting plate having an upwardly rising annular ridge forming a fulcrum, an annular toggle spring plate having two stable, extreme states, placed on said supporting plate over the fulcrum, wherein the fulcrum contacts the spring intermediate it''s outer and inner circumferences, and wherein when the spring is in one state the outer peripheral edge of the spring is above the fulcrum and the inner peripheral edge is below the fulcrum and wherein when the spring is in its second state the relative positions are interchanged, a cylindrical body serving as the adapter and having a lower edge abutting the upper surface of said spring plate along the outer circumference thereof, and a depressing plate located inwardly of said cylindrical body and having a depending lower edge abutting the upper surface of said spring plate along the circumference thereof, all of the above members being included inside of the recessed portion of the turntable surrounding the spindle, whereby when the depressing plate is pushed down, said cylindrical body serving as the adapter is raised up.