Bose Corporation

Lockheed Martin Corporation

Wit Bushko

Prateek Nath

Shawn J Prevoir

George Hanna Ghanime

Thomas Landemaine

Walter V Werner

Earl W Stromberg

Andrew D Dominijanni

Thomas A Froeschle

Christopher A Pare

Agota F Fehervari

Brian M Lucas

Binu K Oommen

Andrew D Munro

Marek Kawka

Brock N Jacobites

Weidong Zhu

Joseph A Stabile

Adam Sears

Nicholas John Joseph

Darek Bushko

A method of forming a device having a compliant member includes creating a membrane having one or more elastomeric layers which are at least partially cured. Another elastomeric layer is provided on the membrane in an uncured state. At least one of a bobbin and a housing are positioned so that an end of the bobbin or housing, or the ends of both the bobbin and housing, extend at least partially into the uncured elastomeric layer. The uncured elastomeric layer is then cured to secure it to the membrane and to the housing or bobbin, or both the housing and bobbin. The method substantially reduces or eliminates the formation of holes that can form during fabrication or use of the device.

Miniature device having an acoustic diaphragm

A method of forming a device having a compliant member includes providing an elastomeric layer in an uncured state. The elastomeric layer is pre-cured to increase its viscosity. Subsequently, a bobbin and housing, each having an end, can be positioned such that their ends extend at least partially into the elastomeric layer. The elastomeric layer is cured to secure it to the bobbin housing. Examples of pre-cure and cure operations include one or more of a thermal cure, evaporative cure and ultraviolet cure, and the application of moisture, microwave energy and chemical additive. Due to the increased viscosity after the pre-cure, the migration of elastomeric material is substantially reduced relative to an uncured elastomeric material. The reduction in elastomeric material migration results in smaller menisci formed along the walls of the housing and bobbin, and reduced thinning of the compliant member formed at their ends.

Method of fabricating a miniature device having an acoustic diaphragm

A loudspeaker includes an acoustic diaphragm, an oscillatory force source, a lever coupling the oscillatory force source to the acoustic diaphragm, and a pivot coupled to the lever such that the lever moves in an arcuate path about the pivot when the oscillatory force source applies a force to the lever. The pivot includes at least one torsion bushing. The at least one torsion bushing includes a first member, a second member coupled to the lever and movable relative to the first member, and an elastomeric member coupling the first member to the second member. Either the first member or the second member is coupled to and moves with the lever. An outer surface of the elastomeric member is coupled to the second member via mechanical compression.

Bushings constrained by compression in levered apparatus

Vibration isolated audio systems and apparatus are provided. In one example, an audio system may include a housing, an acoustic transducer positioned within an aperture of the housing, the acoustic transducer being configured to deliver acoustic energy based on a received audio signal, and at least one tuned vibration isolator positioned proximate the acoustic transducer and configured to substantially reduce vibration.

Audio systems and apparatus for vibration isolation

An acoustic diaphragm made at least in part from an expanded material. The expanded material includes one or more of cellulose, synthetic fibers and glass fibers. The expanded material has more than about 55% by volume voids.

Acoustic diaphragm

An electro-acoustic transducer includes an accordion-type structure that functions as both an acoustic radiation element and an acoustic seal. In one example, the transducer includes parallel, accordion-type structures that attach to a flat, rectangular diaphragm. The diaphragm is connected to a voice coil. The voice coil and an associated frame are positioned between a magnet arrangement. The magnet arrangement includes stacked magnet pairs positioned between pole pieces to focus magnetic flux.

Electro-acoustic transducer with radiating acoustic seal and stacked magnetic circuit assembly

A plurality of connecting elements projects from a body's surface. A plurality of indents is defined in the body's surface. Each stem element includes first and second stalks projecting orthogonally from the surface. The first stub includes a pyramidical cap section and at least one generally planar wall. The second stalk is generally parallel to the first stub and spaced apart from the at least one wall, defining a gap therebetween. The second stalk includes a stem projecting from the surface. A lip section extends from a distal end of the stem and protrudes outwardly relative to the stem. An engagement section extends from the lip section. A free end of the engagement section defines a distal end of the second stalk. An outer surface of the engagement section defines a first gradient tapering from the lip section to the distal end of the second stalk.

Multiple stem design for high density interconnects

A plurality of connecting elements projects from a surface of an article. Each connecting element includes a first stalk and second hollow stalk projecting from the surface. The second stalk is generally coaxial with the first stalk and spaced apart from the first stalk defining a radial gap therebetween. The first stalk includes a cap section. The second stalk includes a stem projecting generally orthogonally, at a proximal end thereof, from the surface. A flange section having a first wall thickness extends from a distal end of the stem and has an outer diameter greater than an outer diameter of the stem at the distal end. An engagement section extends from the flange section. A free end of the engagement section having a second wall thickness defines a distal end of the second stalk and has an outer diameter less than the outer diameter of the flange section.

Connecting elements having a stub surrounded by a hollow stalk with a flange

An article includes a plurality of stems projecting from a surface thereof. Each stem includes a hollow stalk projecting orthogonally from the surface and a hollow head defined on a distal end of the hollow stalk. The head includes a flange section extending from the distal end of the hollow stalk and having an outer diameter greater than an outer diameter of the hollow stalk at the distal end. A cap section extends from the flange section, defines a distal end of the stem and has a generally convex contour. The cap section has a first wall thickness at the distal end of the stem, a second wall thickness at a junction of the cap section and the flange section and a third wall thickness at a circumferential section intermediate the distal end and the flange section. The third wall thickness is less than the first and second wall thicknesses.

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Medway, MA, United States of America

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