Electrodynamic transducer

Claim 1

A TRANSDUCER COMPRISING A SUPPORT, A FLEXIBLE DIAPHRAGM HELD AT ITS EDGES BY THE SUPPORT, A THIN FLEXIBLE CONDUCTOR ADHERING TO SAID DIAPHRAGM FOR CONDUCTING CURRENT EDGEWISE THE DIAPHRAGM ALONG A PREDETERMINED PATH, AND MAGNETIC MEANS INCLUDING MAGNETIC POLES MOUNTED ON SAID SUPPORT ADJACENT THE DIAPHRAGM WITH SAID POLES LYING IN A PLANE SPACED FROM AND PARALLEL TO THE DIAPHRAGM FOR PRODUCING A MAGNETIC FIELD EDGEWISE THE DIAPHRAGM WHICH EXTENDS ACROSS SAID PATH ALWAYS IN THE SAME DIRECTION, RELATIVE THE PATH THROUGHOUT THE LENGTH OF THE PATH, THE CONDUCTING PATH REVERSING DIRECTION PERIODICALLY, THE CONDUCTING PATH BEING ARRANGED IN TWO SERIES OF PARALLEL BANDS, ONE SERIES ON EACH SIDE OF THE DIAPHRAGM, EACH BAND BEING SPACED FROM THE ADJOINING BANDS ON THE SAME SIDE OF THE DIAPHRAGM BY A DISTANCE SLIGHTLY LESS THAN THE WIDTH OF A BAND AND EACH BAND BEING CONNECTED AT ONE END TO ONE OF SAID ADJOINING BANDS AND AT THE OTHER END TO THE OTHER OF SAID ADJOINING BANDS, AND BANDS ON THE OPPOSITE SIDES OF THE DIAPHRAGM BEING STAGGERED SO THAT THERE IS A SLIGHT OVERLAP.