Audio transducer improvements
First Claim
Patent Images
1. An audio transducer comprising:
- first and second magnet assemblies, each having opposed side surfaces;
support means affixed to the side surfaces of the first and second magnet assemblies for supporting the magnet assemblies in a rigid aligned relationship with a gap therebetween, the support means defining a pair of opposed diaphragm openings aligned with the gap;
a diaphragm assembly comprising a pair of flexible first and second webs having central portions joined together to form a movable expanse, each web having opposite end portions which are supportively affixed to the support means, a portion of the diaphragm being received within the diaphragm openings;
the support means supporting the diaphragm such that the movable expanse is located centrally within the gap; and
coil means attached to the expanse of the diaphragm.
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Abstract
An audio transducer having a pair of magnets supported to provide a magnet gap within which a flexible diaphragm supporting an electrical coil is received. The diaphragm is formed of a pair of flexible cylindrical webs joined at their centers to support the coil within the magnet gap. The diaphragm is provided with a row of perforations on either side of the gap to provide flexibility and is aligned centrally within the gap by tab portions partially cut from the diaphragm and folded to be adhered to the magnets.
22 Citations
19 Claims
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1. An audio transducer comprising:
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first and second magnet assemblies, each having opposed side surfaces; support means affixed to the side surfaces of the first and second magnet assemblies for supporting the magnet assemblies in a rigid aligned relationship with a gap therebetween, the support means defining a pair of opposed diaphragm openings aligned with the gap; a diaphragm assembly comprising a pair of flexible first and second webs having central portions joined together to form a movable expanse, each web having opposite end portions which are supportively affixed to the support means, a portion of the diaphragm being received within the diaphragm openings; the support means supporting the diaphragm such that the movable expanse is located centrally within the gap; and coil means attached to the expanse of the diaphragm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An audio transducer comprising:
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a pair of first and second magnet assemblies first and second support plates affixed to the first and second magnet assemblies, the support plates supporting the magnet assemblies such that the magnet assemblies are disposed between the support plates and in an aligned spaced apart relationship to one another to define a magnet gap therebetween, each support plate defining a central diaphragm opening aligned in registration with the magnet gap; a diaphragm comprising a pair of elongate flexible webs having central portions joined together to form a movable expanse located between the first and second magnet assemblies, each web having opposite end portions, one end portion of which is affixed to the first support plate and the other end portion of which is affixed to the second support plate, the webs being supported such that they extend through both central diaphragm openings and define curved surfaces which are mere images of one another; and coil means attached to the expanse of the diaphragm.
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12. An audio transducer comprising:
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a pair of first and second magnet assemblies spaced apart by a magnet gap therebetween, each magnet assembly having a magnetic core and a pair of first and second magnetic pole plates of opposite magnetic polarity affixed to opposite sides of ht magnetic core; a pair of first and second parallel plates affixed to the pole plates such that the first and second magnet assemblies are disposed therebetween, the first and second plates each defining a central opening aligned with the magnet gap; a diaphragm comprising a pair of elongate curved webs having central portions joined together to form a movable expanse supported within the magnet gap, each web extending through the central openings in the first and second plates and having opposite end portions, one of which is affixed to an end of the first plate and the other of which is affixed to an end of the second plate, whereby the webs are supported such that they form a substantially figure eight pattern; and coil means attached to the expanse. - View Dependent Claims (13)
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14. An audio transducer comprising:
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a pair of first and second magnet assemblies; a frame for supporting the magnet assemblies adjacent to one another with a gap therebetween; a diaphragm comprising a pair of first and second elongate flexible webs having central portions joined together to form a movable expanse located in the gap, the webs each having opposite end portions; web supporting means for supporting the end portions of the webs such that the webs form curved surfaces which are mirror images of one another; centering means for centering the expanse in the gap, the centering means including tab means integrally formed from at least one of the webs; and tab securing means for securing the tab means against at least one of the magnet assemblies. - View Dependent Claims (15, 16, 17, 18)
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19. An audio transducer comprising:
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a frame; a diaphragm comprising a pair of elongate webs having portions joined to each other to form a movable substantially planar expanse, the webs each having flexible end portions extending from the expanse in an arc to a remote frame location; coil means attached to the expanse of the diaphragm; magnetic means adjacent to and on opposite sides of the expanse for producing opposing magnetic fields extending normal to the expanse; centering means for centering the expanse within the magnetic field, the centering means including at least one tab extending from the first web away from the expanse in one direction and at least one additional tab extending from the second web away from the expanse in the opposite direction; and tab securing means for securing the tabs against the magnetic means.
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Specification