Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Application No. | Application Title | Issue Date |
| 20070230277 | MULTI PISTON ELECTRO-MECHANICAL TRANSDUCTION APPARATUS An electro-mechanical transducer, which provides radial amplified multiple piston motion is formed from attached multiple lever arms and multiple electro-mechanical drivers. The piston motion is amplified by lever arms, which are attached to electro-mechanical drivers, ... | 10/04/2007 |
| 20070206441 | Flexural cylinder projector An inverse flextensional projector exhibits a low frequency flexural mode and a higher frequency “breathing” mode to defeat stealthy targets and to conduct short and long range detection and tracking in littoral waters. The device has much broader bandwidth than con... | 09/06/2007 |
| 20060198247 | Shear mode folded shell projector An acoustic projector with a thin walled shell extending between flanges having helicoidal corrugations extending between the flanges. A shear mode motor is coupled to the thin walled shell to provide a torque to the thin walled shell. ... | 09/07/2006 |
| 20060133212 | Portable low frequency projector A portable low frequency underwater acoustic projector having two circular diaphragms separated by a spacer ring with a pair of coils and oscillating masses being located in pipes connected to central opening in two diaphragms, the coils driving these masses in opposite... | 06/22/2006 |
| 20060125348 | Micromachined ultrasonic transducer cells having compliant support structure A micromachined ultrasonic transducer array comprising a multiplicity of cMUT cells built on a substrate. Each cMUT cell comprises a compliant support structure built on the substrate, a membrane supported over a cavity by the compliant support structure, a first electr... | 06/15/2006 |
| 20060056275 | Acoustic projector and method of manufacture An underwater acoustic projector comprising one or more cylindrical shell segments (8), each shell segment (8) having an even number of drivers (10) mounted therein, and the method of manufacturing said projector. The shell segments (8) prefe... | 03/16/2006 |
| 20050152222 | Convex folded shell projector An acoustic projector comprising a pair of spaced apart end plates with an acoustic driver positioned between the end plates. The end plate's edges are secured to an outer one-piece thin walled shell that provides an enclosure for the driver. That thin walled shell has ... | 07/14/2005 |
