Bose Corporation

Geoffrey C Chick

Brian M Lucas

Johan H Isaksson

Benjamin G K Peterson

Roman N Litovsky

Hal P Greenberger

Christopher B Ickler

George Nichols

Thomas C Schroeder

Roger Mark

Richard Tucker Carlmark

Joseph A Stabile

Carl Ralph Jensen

Jun Ma

Weidong Zhu

Dewey L Potter

David E Hanson

George c/o Bose Corporation Nichols

An apparatus includes at least one load and a plurality of armatures, each including a permanent magnet, which are coupled to the at least one load to cause the at least one load to move. The apparatus also includes a common stator that defines an air gap within which the plurality of armatures is disposed. The common stator is configured for creating magnetic flux across the air gap for the armatures to interact with, thereby to drive motion of the at least one load.

Driving plural armatures with a common stator

An apparatus includes a load and a first armature. A first lever mechanically couples the first armature and the load. Motion of the first armature causes the first lever to pivot about a first pivot axis. The apparatus also includes a second armature and a second lever that mechanically couples the second armature and the load. Motion of the second armature causes the second lever to pivot about a second pivot axis. At least one stator is provided for creating magnetic flux for the first and second armatures to interact with, thereby to drive motion of the load. The apparatus also includes a coupling mechanism that couples the first lever and the second lever. The coupling mechanism is arranged to encourage common mode oscillation of the first and second levers and inhibit differential mode oscillation of the first and second levers, thereby to inhibit rocking of the load.

Inhibiting rocking of loads driven by plural levers

A loudspeaker includes an acoustic diaphragm, a lever, and an oscillatory force source for driving the lever in oscillatory, rotary motion about a pivot axis. The loudspeaker also includes a connector that couples the lever to the acoustic diaphragm. The connector includes a first rotary joint that defines a first rotary axis that is fixedly attached to the acoustic diaphragm, a second rotary joint that defines a second rotary axis that is fixedly attached to the lever, and a linkage coupling the first and second rotary joints. The connector allows for rotational and translational movement of the lever and the diaphragm relative to each other.

Levered loudspeakers

An electro-acoustic driver including an acoustic waveguide includes an enclosure, an acoustic transmission line formed within the enclosure, and a plurality of acoustic transducers contained within the enclosure and disposed along a length of the acoustic transmission line. Each acoustic transducer is configured to emit acoustic energy directly into the acoustic transmission line at two separated locations along the length of the acoustic transmission line.

Transmission line loudspeaker

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.

Elastomeric torsion bushings for levered loudspeakers

A loudspeaker includes an acoustic diaphragm, an oscillatory force source, a lever that couples the oscillatory force source to the acoustic diaphragm, and a pivot that is coupled to the lever such that the lever pivots about a pivot axis when the oscillatory force source applies a force to the lever. The pivot includes a pair of rotational joints which are spaced apart to allow the diaphragm to pass therebetween as the lever pivots about the pivot axis.

A loudspeaker including an acoustic waveguide includes an enclosure, an acoustic transmission line formed within the enclosure, and a plurality of acoustic transducers contained within the enclosure and disposed along a length of the acoustic transmission line. Each acoustic transducer is configured to emit acoustic energy directly into the acoustic transmission line at two separated locations along the length of the acoustic transmission line.

A loudspeaker including a moving magnet motor. The moving magnet motor includes an armature comprising a magnet carrier, and a lever arm, coupling the armature and a pivot. The lever arm further couples the armature and an acoustic diaphragm to transmit motion of the armature to the acoustic diaphragm to cause the acoustic diaphragm to move. The loudspeaker described may be torque balance and moment balanced.

Loudspeaker moment and torque balancing

Moving magnet levered loudspeaker

A loudspeaker having an omnidirectional radiation pattern at high frequencies. The loudspeaker includes an acoustic device that includes an acoustic enclosure; an acoustic driver, mounted in the acoustic enclosure; and a sheet of compliant material with a aperture therethrough, mounted in the enclosure, between the acoustic driver and the environment.

Acoustic radiation pattern adjusting

An audio device has passive radiators that are driven by acoustic drivers. The passive radiators are arranged so that the net mechanical vibration is minimized.

Passive acoustic radiating

An internal combustion engine may be provided with independently controllable valves, fuel injectors and ignition elements that may be used to start the engine without a separate auxiliary device such as an electric starter motor. The engine may fire the cylinders under a startup mode of control at the same time it fires the cylinders under a normal mode of control in order to smooth the transition from start up to normal operating mode. Additionally, an internal combustion engine may use independently controllable valves to stop the engine and ensure that one or more of the pistons come to rest at a position which allows them to be used to restart the engine.

Controlled starting and braking of an internal combustion engine

A loudspeaker system includes an enclosure supporting first and second loudspeaker driver assemblies and having an internal volume. At least the first loudspeaker driver assembly is constructed and arranged to radiate sound energy into the listening region outside the enclosure over at least the range of audio frequencies above a predetermined first frequency. The second loudspeaker driver assembly is constructed and arranged to radiate sound energy over a first predetermined range of audio frequencies embracing at least a range of audio frequencies below a second frequency above the first frequency. The first loudspeaker driver assembly, the second loudspeaker driver assembly and the enclosure are constructed and arranged to coact to maintain the pressure in the enclosure substantially constant over at least the range of frequencies between the first and second frequencies.

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Norfolk, MA, United States of America

Geoffrey C Chick