초록 ▼

A loudspeaker with a voice coil reciprocally disposed in a magnetic gap provided with means for conducting heat outwardly from the gap comprising a flat circular web disposal in abuttment with the magnetic structure and extending between a cylindrical collar which confronts the voice coil former to

A loudspeaker with a voice coil reciprocally disposed in a magnetic gap provided with means for conducting heat outwardly from the gap comprising a flat circular web disposal in abuttment with the magnetic structure and extending between a cylindrical collar which confronts the voice coil former to a circular ring integral with the frame of the loudspeaker and including vanes extending from the web between the collar and ring. The voice coil former is limited to axial motion by a pair of spaced flat disks mounted at their centers on the central pole piece normal to the axis of motion and on the coil former at their perimeters.

대표청구항 ▼

A loudspeaker comprising, in combination: a frame having a basket with a circular portion; a diaphragm; means mounted on the diaphragm and the circular portion of the basket for mounting the diaphragm for translation along an axis normal to the plane of the circular portion; a magnetic structure mou

A loudspeaker comprising, in combination: a frame having a basket with a circular portion; a diaphragm; means mounted on the diaphragm and the circular portion of the basket for mounting the diaphragm for translation along an axis normal to the plane of the circular portion; a magnetic structure mounted to the frame having a ferromagnetic plate with first and second spaced opposed surfaces, said plate having a cylindrical opening extending therethrough between the first and second surfaces, and a ferromagnetic cylindrical pole piece of smaller diameter than the cylindrical opening disposed co-axially within the opening to form a annular gap between the pole piece and the plate, the magnetic structure producing a magnetic field with lines of force extending radially across the annular gap; a cylindrical voice coil with a central axis having an inner diameter greater than the diameter of the cylindrical pole piece and an outer diameter less than the diameter of the cylindrical opening in the plate, the length of said coil along the central axis thereof being greater than the distance between the first and second surfaces of the plate; means for mounting the voice coil on the diaphragm for translation along the axis of translation of the diaphragm, said mounting means including means for suspending the voice coil co-axially within the annular gap with one end portion of the coil extending outwardly of the first surface of the plate; and means for cooling the voice coil comprising a member of non-magnetic thermally conducting material disposed in abutment with the first surface of the plate, said member having a collar with a cylindrical orifice with a diameter approximately equal to the diameter of the opening in the plate and disposed co-axially with the opening in the plate, said member having a web extending outwardly from the collar in abutment with the plate and a plurality of spaced vanes disposed in planes traversing the central axis of the voice coil and extending outwardly from the collar and the web.