Loudspeaker having a yoke, magnet, cylindrical throat, and space

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure

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Details

381343, 381412, 381174, 381396, H04R 102, H04R 120, H04R 100

Patent

active

058781498

ABSTRACT:
A loudspeaker has a yoke having a center hole, a cylindrical magnet mounted on the yoke, a cylindrical pole piece having an inner shoulder portion and mounted on the magnet. A diaphragm is provided above the pole piece, and a cylindrical throat is disposed in the magnet. The yoke has a screw thread formed on an inside wall of the center hole, and the pole piece has a screw thread formed on an inside wall of the shoulder portion. The throat has outer screw threads on an outside wall thereof at an upper portion and a low portion. The outer screw threads are engaged with the screw threads of the yoke and the pole piece. Thus, the magnet is secured to the yoke and the pole piece.

REFERENCES:
patent: 1707544 (1929-04-01), Thuras
patent: 2037187 (1936-04-01), Wente
patent: 3033945 (1962-05-01), Villchur
patent: 3196211 (1965-07-01), Kessenich
patent: 3293378 (1966-12-01), Heppner
patent: 3780232 (1973-12-01), Russell
patent: 4152552 (1979-05-01), Meyer
patent: 4315102 (1982-02-01), Eberbach
patent: 5014321 (1991-05-01), Klein

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