Compact horn speaker
AssigneeFederal Signal Corporation
InventorCarlos I. Beltran
Life of this patent
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Abstract
A compact horn speaker suitable for use on emergency vehicles has a rear-facing motor circuit, a horn plate, and a mouth section. The horn plate has a plurality of horns folded therein in a plane perpendicular to the longitudinal direction of the speaker. The phase plug for the motor circuit is integrally formed on the horn plate and has a plurality of apertures each opening to a folded horn in the horn plate. The folded horns are connected to a horn mouth formed in the mouth section. The mouth section is formed of a thermally conductive material and has an integrally formed receptacle for receiving the magnet assembly of the motor circuit. The receptacle holds the motor circuit firmly in position and provides efficient thermal dissipation via the horn structure for heat generated by the motor circuit during operation.
Claims6
A compact horn speaker comprising:
- a motor circuit having a dome-shaped movable diaphragm, a voice coil attached to the movable diaphragm, and a magnet assembly for interacting with the voice coil to move the movable diaphragm to generate acoustic energy;
- a horn plate having a plurality of horns folded in a plane of the horn plate and an integrally formed concave phase plug spaced from the movable diaphragm, the phase plug having a plurality of apertures each opening to a respective one of the folded horns for passing acoustic energy into the respective folded horn;
- a mouth section having a unitary body formed of a thermally conductive material and shaped into a horn mouth which is connected to the plurality of folded horns for coupling the acoustic energy to external air, the unitary body having an integrally formed receptacle for receiving the magnet assembly, the receptacle sized and shaped to match the magnet assembly to provide thermal contact for conducting heat generated by the motor circuit during operation to the mouth section.
Dependencies are inferred from the claim text.