Electrodynamic loudspeaker

Details Electrodynamic loudspeaker Electrodynamic loudspeaker

1980-03-14

1982-07-27

Stellar, George G.

1791155VC, H04R 906

Patent

active

043419305

ABSTRACT:
An electrodynamic loudspeaker having a cone diaphragm within which there is arranged a centrally located body which influences the acoustic radiation. This body is formed by an extension of the magnet core of the moving coil which extension is enlarged in the region of the mouth of the cone to form a partial covering of the cone chamber up to about half of the diameter of the cone mouth. The central part of the covering is approximately equal to one and a half times the diameter of the magnet core and forms a closed surface. In the remaining edge area of the covering there are axially arranged passages, the cross-sections of which occupy approximately one-half of this edge area. An electrodynamic loudspeaker with a cone diaphragm also has a support of the moving coil which extends beyond its point of attachment to the diaphragm up into the space within the cone diaphragm and with the end of this extension dips into a cap-shaped part which is secured fixedly to the loudspeaker while retaining a slight radial clearance therebetween.

REFERENCES:
patent: 1820585 (1931-08-01), Tolerton
patent: 2067582 (1937-01-01), Sperling
patent: 2537723 (1951-01-01), Ward
patent: 2621261 (1952-12-01), Karlsson et al.
patent: 2926221 (1960-02-01), Kagdis
patent: 3796839 (1974-03-01), Torn
patent: 3935402 (1976-01-01), Gersten

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