Abstract: A rotating-machine test fixture includes a base, a flexible member and a wedge member. The base includes a longitudinal axis and receives a rotating machine so that an axis of rotation of the rotating machine is aligned in a direction that is substantially parallel to the longitudinal axis of the base. The flexible member includes a first end attached to the base at a first location and a second end slidably attached to the base at a second location to hold the received rotating machine against the base. The wedge member is coupled to the base and moves in a direction that is substantially parallel to the longitudinal axis of the base. The wedge member may be selectably positioned between the received rotating machine and the base to align the axis of rotation of the rotating machine to be substantially parallel to the longitudinal axis of the base.

Abstract: A rotating-machine test fixture includes a base, a flexible member and a wedge member. The base includes a longitudinal axis and receives a rotating machine so that an axis of rotation of the rotating machine is aligned in a direction that is substantially parallel to the longitudinal axis of the base. The flexible member includes a first end attached to the base at a first location and a second end slidably attached to the base at a second location to hold the received rotating machine against the base. The wedge member is coupled to the base and moves in a direction that is substantially parallel to the longitudinal axis of the base. The wedge member may be selectably positioned between the received rotating machine and the base to align the axis of rotation of the rotating machine to be substantially parallel to the longitudinal axis of the base.

Abstract: A case for an audio mixer console comprises first and second frame members, a carrier surface and a releasable latch member. The first and second frame members are spaced apart from each other. A first side of the carrier surface is proximate to the first frame member and a second side of the carrier surface is proximate to the second frame member. The carrier surface is pivotally coupled to the first and second frame sides along a first axis of rotation and moves with respect to the first axis of rotation between a first position and a second position. The carrier surface further comprises a catch member located proximate to a back edge of the carrier surface between the first and second frame sides. The releasable latch member releasably engages the catch member when the carrier surface is in the second position.

Abstract: A speaker system comprises a speaker transducer, a diffraction-slot acoustic waveguide and first and second mechanical acoustic barriers. The waveguide is arranged in proximity to the speaker transducer along a centerline of the speaker transducer so that the waveguide extends substantially an equal distance on both sides of the centerline of the speaker transducer. The area of the waveguide covers a corresponding area of the speaker transducer. The first and second mechanical acoustic barriers are respectively disposed on each side of the waveguide and cover the areas of the speaker transducer on both sides of the centerline of the speaker transducer that are not covered by the waveguide. The first and second mechanical acoustic barriers provide a low-pass filter for acoustic energy output from the speaker transducer.

Abstract: A speaker system comprises a speaker transducer, a diffraction-slot acoustic waveguide and first and second mechanical acoustic barriers. The waveguide is arranged in proximity to the speaker transducer along a centerline of the speaker transducer so that the waveguide extends substantially an equal distance on both sides of the centerline of the speaker transducer. The area of the waveguide covers a corresponding area of the speaker transducer. The first and second mechanical acoustic barriers are respectively disposed on each side of the waveguide and cover the areas of the speaker transducer on both sides of the centerline of the speaker transducer that are not covered by the waveguide. The first and second mechanical acoustic barriers provide a low-pass filter for acoustic energy output from the speaker transducer.

Abstract: A case for an audio mixer console comprises first and second frame members, a carrier surface and a releasable latch member. The first and second frame members are spaced apart from each other. A first side of the carrier surface is proximate to the first frame member and a second side of the carrier surface is proximate to the second frame member. The carrier surface is pivotally coupled to the first and second frame sides along a first axis of rotation and moves with respect to the first axis of rotation between a first position and a second position. The carrier surface further comprises a catch member located proximate to a back edge of the carrier surface between the first and second frame sides. The releasable latch member releasably engages the catch member when the carrier surface is in the second position.

Abstract: A case for an audio mixer console comprises first and second frame members, a carrier surface and a releasable latch member. The first and second frame members are spaced apart from each other. A first side of the carrier surface is proximate to the first frame member and a second side of the carrier surface is proximate to the second frame member. The carrier surface is pivotally coupled to the first and second frame sides along a first axis of rotation and moves with respect to the first axis of rotation between a first position and a second position. The carrier surface further comprises a catch member located proximate to a back edge of the carrier surface between the first and second frame sides. The releasable latch member releasably engages the catch member when the carrier surface is in the second position.

Abstract: A case for an audio mixer console comprises first and second frame members, a carrier surface and a releasable latch member. The first and second frame members are spaced apart from each other. A first side of the carrier surface is proximate to the first frame member and a second side of the carrier surface is proximate to the second frame member. The carrier surface is pivotally coupled to the first and second frame sides along a first axis of rotation and moves with respect to the first axis of rotation between a first position and a second position. The carrier surface further comprises a catch member located proximate to a back edge of the carrier surface between the first and second frame sides. The releasable latch member releasably engages the catch member when the carrier surface is in the second position.

Abstract: A lifting device comprises at least two multi-stage masts and a cable mechanism. Each multi-stage mast comprises a first length and a second length that is longer than the first length. Each multi-stage mast further comprises a plurality of stages, such that at least one stage of a mast is vertically movable with respect to at least one other stage. The cable mechanism comprises a spool and at least one cable that is coupled to the spool and arranged with respect to the multi-stage masts so that when each cable is wound onto the spool, each mast simultaneously and in unison changes length in a direction from the first length to the second length, and when each cable is unwound off the spool, each mast changes length simultaneously and in unison in a direction from the second length to the first length.

Abstract: A lifting device comprises at least two multi-stage masts and a cable mechanism. Each multi-stage mast comprises a first length and a second length that is longer than the first length. Each multi-stage mast further comprises a plurality of stages, such that at least one stage of a mast is vertically movable with respect to at least one other stage. The cable mechanism comprises a spool and at least one cable that is coupled to the spool and arranged with respect to the multi-stage masts so that when each cable is wound onto the spool, each mast simultaneously and in unison changes length in a direction from the first length to the second length, and when each cable is unwound off the spool, each mast changes length simultaneously and in unison in a direction from the second length to the first length.