Electro-dynamic exciter
AssigneeNew Transducers Limited
InventorsHenry Azima, Martin Roberts, Edward Jarvis
Life of this patent
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Abstract
An electro-dynamic inertial vibration exciter (1), for exciting a member (2) having capability to sustain and propagate input vibrational energy comprising a motor coil assembly (3, 4) having a coil (3) rigidly fixed to a tubular coil former member (4), a magnet assembly (5, 6, 7) disposed concentrically with respect to the motor coil assembly, and means (11) suspending the magnet assembly for axial movement relative to the motor coil assembly, characterized by a carrier (9) supporting the motor coil assembly (3, 4) and adapted for connection to the member (2) to be excited.
Claims44
An electro-dynamic inertial vibration exciter (1) for exciting a member (2) having capability to sustain and propagate input vibrational energy comprising a motor coil assembly (3, 4) having a coil (3) rigidly fixed to a tubular coil former member (4), a magnet assembly (5, 6, 7) disposed concentrically with respect to the motor coil assembly and movable axially relative to the motor coil assembly, an axially compliant suspension (11) for the magnet assembly, and a carrier (9) supporting the motor coil assembly (3, 4) and adapted for connection to the member (2) to be excited, further comprising a coupling member (12) adapted to interfit with the magnet assembly (5, 6, 7), and wherein the suspension (11, 23, 24) is connected between the carrier (9) and the coupling member (12).
A loudspeaker comprising a member (2) having capability to sustain and propagate input vibrational energy, and an electro-dynamic inertial vibration exciter (1) for exciting said member, said exciter comprising a motor coil assembly (3, 4) having a coil (3) rigidly fixed to a tubular coil former member (4), a magnet assembly (5, 6, 7) disposed concentrically with respect to the motor coil assembly and movable axially relative to the motor coil assembly, an axially compliant suspension (11) for the magnet assembly, and a carrier (9) supporting the motor coil assembly (3, 4) and connected to the member (2) to be excited, further comprising a coupling member (12) adapted to interfit with the magnet assembly (5, 6, 7), and wherein the suspension (11, 23, 24) is connected between the carrier (9) and the coupling member (12).
Dependencies are inferred from the claim text.