Patent ID: 8602960

Claim:
A magnetic field therapy apparatus, comprising: a first bobbin formed of non-magnetic material having a first interior circumference and a first exterior circumference with a first radius Ra to said first interior circumference, and having a starting side and a terminating side; a second bobbin formed of non-magnetic material having a second interior circumference and a second exterior circumference with a second-radius Rb to said second exterior circumference, and having a starting side and a terminating side and wherein said second bobbin is concentrically confined by said first bobbin; said second bobbin including a hollow second bobbin interior region adapted for receipt therein of at least an appendage of a living being; a first length of electrically conductive insulated wire wound around said first bobbin from the first bobbin starting side to the first bobbin terminating side, to form a first coil; a second length of electrically conductive insulated wire wound around said second bobbin from the second bobbin starting side to the second bobbin terminating side to form a second coil, and wherein said first and second coils are electrically connected in series; and, an AC power unit coupled to the first and second lengths of wire for energizing said first and second coils and generating a magnetic field within said second bobbin interior region: wherein the difference in length of the second radius Rb of the second bobbin and the first radius Ra of the first bobbin is equal to or less than 4% of the length of the first radius Ra.