A multi-driver loudspeaker combination includes a first transducer of the dynamic radiator type, designed to reproduce sound in the lower portion of the audio frequency range. The radiator of the first transducer includes a diaphragm. The combination also includes a second transducer designed to reproduce sound in the upper portion of the audio frequency range. A base support, which is somewhat horn-shaped, is mounted on the first transducer diaphragm, a voice coil form, or dust cap, or some combination of these, within the periphery of the first transducer diaphragm, and extends away from the first transducer. This base support terminates at an edge remote from the first transducer. The edge is in the form of a closed plane curve. The second transducer includes a diaphragm having a perimetral edge which is joined to the edge of the base support to support the second transducer from the first. This mounting structure permits orientation of the second transducer axis at an angle to the axis of the first transducer. Another multi-driver loudspeaker combination comprises the first transducer, a second transducer including a piezoelectric crystal driver, and an adhesive for gluing the piezoelectric crystal of the second transducer to the dust cap of the first transducer. Again, the axis of the second transducer can be oriented at an angle to the axis of the first transducer.

Multi-driver loudspeaker

A loud-speaker system comprising at least a loud-speaker means for high sound with a loud-speaker means for low sounds arranged substantially coaxially thereto is provided in which the loud-speaker means for high sounds is adjustably mounted to the loud-speaker means for low sounds so that the position of the former can be adjusted relative to that of the latter in order to compensate for the directional characteristics of the former relative to the location of the listener.

Loud-speaker system

A speaker rigging system that features a modular speaker cabinet that incorporates an internal load bearing frame and an internal speaker to speaker coupling mechanism. Speaker to speaker coupling is accomplished by means of a plurality of small, easy to handle coupling pins that allow for the creation of vertical speaker arrays with a minimal gap between speakers in the array.

Modular speaker cabinet including an integral rigging system

Device for color projection of invisible rays

Electronic storage device

Our invention relates to cathode ray storage tube apparatus and particularly to methods of and means for utilizing such apparatus for ground clutter reduction in radar systems, for delaying signals, etc. S The invention will be described with particular reference to the use of a television...

Irving Wolff

Papers

Cathode-ray storage tube apparatus and method of operation

Auditorium loud speaker

Pulse echo altimeter with mechanically driven indicator