Support for electro-acoustic transducer

Claim 1

A VIBRATILE DISC AND ITS SUPPORT, WHICH COMPRISES A MEMBER HAVING A RECESS OPENING THROUGH A FACE THEREOF, SAID MEMBER HAVING AN ENDLESS RABBET WITH TWO WALLS AT ANGLES TO ONE ANOTHER BORDERING SAID RECESS AND OPENING OUTWARDLY OF THE RECESS AND AT ITS INNER SIDE INTO SAID RECESS, AN ENDLESS ELASTOMERIC ELEMENT DISPOSED IN SAID RABBET AND ABUTTING SAID TWO WALLS OF SAID RABBET, A VIBRATILE DISC HAVING A MARGINAL EDGE FACE SUBSTANTIALLY PERPENDICULAR TO ITS OTHER FACES, DISPOSED ACROSS SAID RECESS WITH ITS SAID MARGINAL EDGE FACE ABUTTING THE INNER PERIPHERY OF SAID ELEMENT, AND MEANS CARRIED BY SAID MEMBER AND ADJUSTABLE THEREON IN A DIRECTION NORMAL TO THE PLANES OF SAID OTHER FACES OF SAID DISC TO CONFINE SAID ELEMENT IN SAID RABBET AND COMPRESS IT AGAINST SAID TWO WALLS AND SAID MARGINAL EDGE FACE UNDER A PRESSURE VARYING WITH THE SAID ADJUSTMENT OF SAID MEANS, THE INNER PERIPHERY OF SAID ELASTOMERIC ELEMENT, IN TRANSVERSE CROSS-SECTION RECEDING OUTWARDLY FROM AND OUT OF CONTACT WITH THE FACES OF SAID DISC, ABUTTING SAID DISC SOLELY ALONG ITS SAID MARGINAL EDGE, AND FORMING THE MAIN SUPPORT FOR SAID DISC.