Sound reproducing and recording device

Claim 1

AN ELECTROMAGNETIC TRANSDUCER FOR THE TRANSLATION OF SOUND COMPRISING A PAIR OF REFLEXED BIPOLAR MAGNETS, A SIGNAL-CONVEYING COIL, A DIAPHRAGM AND MEANS SUPPORTING SAID MAGNETS WITH THEIR LIKE POLES FACING AND SEPARATED TO PROVIDE A MAGNETIC AIR GAP THEREBETWEEN HAVING A FIELD OF FLATTENED AND ORIENTED MAGNETIC LINES OF FORCE; SAID COIL BEING WOUND OVER AND SECURED TO SAID DIAPHRAGM, AND SUPPORT MEANS PROVIDED FOR SUSPENDING SAID DIAPHRAGM AND COIL IN SAID GAP SO THAT THE SURFACES OF SAID DIAPHRAGM AND SAID COIL WITHIN SAID GAP ARE SUBSTANTIALLY PARALLEL TO THE FLATTENED SAID LINES OF FORCE; SAID COIL SURFACE WITHIN SAID GAP BEING SUBSTANTIALLY COEXTENSIVE WITH THE FLATTENED PORTION OF SAID FIELD AND BEING ORIENTATED WITH SAID FIELD IN SUCH MANNER THAT A CURRENT CONVEYED IN EITHER DIRECTION THROUGH SAID COIL WOULD, EVERYWHERE, CUT THE MAGNETIC LINES OF FORCE GENERATED BY SAID MAGNETS AND LYING ON THE SURFACE OF SAID COIL AT A SUBSTANTIALLY RIGHT ANGLE AND IN THE SAME DIRECTION RELATIVE TO THE DIRECTIONS OF SAID LINES OF FORCE.