Piston loudspeaker
First Claim
Patent Images
1. A loudspeaker comprising:
- a rigid, light-weight diaphragm having broad front and rear faces,a magnetically permeable keeper having a channel-shaped cross-section and forming a substantially closed loop,means supporting said keeper adjacent and spaced from said rear face of said diaphragm with the open side of said channel facing said diaphragm,a pair of magnets formed of fine grain, high coercivity, permanent magnetic material and supported within said keeper channel, one along each side wall of said channel, said magnets extending around said substantially closed loop of said keeper and being magnetized and positioned with opposite poles in spaced facing relation, anda voice coil secured to said rear face of said diaphragm and positioned in the space between said magnets around said substantially closed loop of said keeper.
0 Assignments
0 Petitions
Accused Products
Abstract
An electroacoustic loudspeaker having a rigid, light-weight diaphragm and a substantially closed loop magnet support of a magnetically permeable material having a channel-shaped cross-section and supported adjacent and spaced from the diaphragm with the open side of the channel facing the diaphragm. The magnet support carries a pair of magnets magnetized and positioned with opposite poles in spaced facing relation and a voice coil is secured to the diaphragm and lies in the gap between the magnets.
55 Citations
7 Claims
-
1. A loudspeaker comprising:
-
a rigid, light-weight diaphragm having broad front and rear faces, a magnetically permeable keeper having a channel-shaped cross-section and forming a substantially closed loop, means supporting said keeper adjacent and spaced from said rear face of said diaphragm with the open side of said channel facing said diaphragm, a pair of magnets formed of fine grain, high coercivity, permanent magnetic material and supported within said keeper channel, one along each side wall of said channel, said magnets extending around said substantially closed loop of said keeper and being magnetized and positioned with opposite poles in spaced facing relation, and a voice coil secured to said rear face of said diaphragm and positioned in the space between said magnets around said substantially closed loop of said keeper. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification