Electro-magnetic apparatus for converting mechanical displacements into electrical voltages

Claim 1

AN ELECTRO-MAGNETIC DEVICE FOR CONVERTING MECHANICAL DISPLACEMENT INTO AN ELECTRICAL VOLTAGE, COMPRISING A PRIMARY MAGNETIC CORE STRUCTURE BEARING AT LEAST ONE PRIMARY COIL, A SEPARATE SECONDARY CORE STRUCTURE NORMAL TO SAID PRIMARY CORE STRUCTURE AND, HAVING AT LEAST TWO SUBSTANTIALLY PARALLEL LIMBS WHICH DEFINE WITH THE PRIMARY CORE A PAIR OF AIR GAPS, A PAIR OF SHORTED TURNS DISPOSED ONE AROUND EACH OF SAID TWO LIMBS OF THE SECONDARY CORE, ONE AT EACH GAP, AT LEAST ONE OF THE SHORTED TURNS BEING SUBJECT TO MECHANICAL DISPLACEMENT RELATIVE TO THE CORES, SAID SECONDARY CORE STRUCTURE FURTHER INCLUDING BRIDGE PORTIONS CONNECTING SAID PARALLEL LIMBS TO ONE ANOTHER AT THEIR ENDS AND SO FORMING A MAGNETIC BRIDGE CIRUCIT IN WHICH THE MAGNETIC IMPEDANCES OF THE AIR GAPS ON OPPOSITE SIDES OF THE SHORTED TURNS CONSTITUTE FOUR BRIDGE ARM IMPEDANCES AND AT LEAST ONE OUTPUT COIL ON SAID SECONDARY CORE STRUCTURE.