Audible signal device

Claim 1

A TWO-TONE BELL COMPRISING A GONG AND CHIME BAR SPACED APART FROM EACH OTHER, AN OSCILLATORY CLAPPER WHICH ENGAGES THE GONG SHARPLY ON ONE STROKE AND THE CHIME BAR LIGHTLY ON THE OPPOSITE STROKE, A RESILIENT POSITIONING ELEMENT ENGAGEABLE WITH THE CLAPPER DURING ITS STROKE TOWARD THE CHIME BAR AND SUPPORTING THE CLAPPER IN A POSITION INTERMEDIATE THE GONG AND THE CHIME BAR WHEN THE CLAPPER IS AT REST, AN ELECTROMAGNET WHICH UPON ENERGIZATION MOVES THE CLAPPER AGAINST THE GONG AND UPON DEENERGIZATION THEREOF PERMITS THE CLAPPER TO FALL AGAINST THE RESILIENT POSITIONING ELEMENT, CAUSING THE CLAPPER TO STRIKE THE CHIME BAR LIGHTLY AND BUT MOMENTARILY, AND A RIGID BAR ADJACENT THE SUPPORTED END OF THE LEAF SPRING BUT SHORTER IN LENGTH THAN THE LEAF SPRING SO THAT THE FREE END OF THE LEAF SPRING EXTENDS BEYOND THE END OF THE RIGID BAR, THE RIGID BAR LIMITING THE DEFLECTION OF THE LEAF SPRING IN THE DIRECTION OF THE GONG BUT NOT IN THE DIRECTION OF THE CHIME BAR.