Abstract: A method for determining a spring constant/rigidity of a cantilever of a known shape, the method involving: measuring a resonance frequency of the cantilever in a plurality of static equilibrium positions in which the shape of the cantilever is different and determining a spring constant and/or rigidity of the cantilever using the measured frequencies. The resonance frequency may be at least one of a torsional and lateral resonance frequency.

Abstract: An aquatic electrical barrier that has the electrodes configured in a matrix array configuration, where each electrode element of the matrix array is mounted either directly on the bottom of a water channel or on extendable rods; the matrix array is controlled so that aquatic species may be physically moved by the aquatic species physiological response to a time-varying and spatially-varying electrical field.

Abstract: A method for determining a spring constant/rigidity of a cantilever of a known shape, the method involving: measuring a resonance frequency of the cantilever in a plurality of static equilibrium positions in which the shape of the cantilever is different and determining a spring constant and/or rigidity of the cantilever using the measured frequencies. The resonance frequency may be at least one of a torsional and lateral resonance frequency.

Abstract: Described herein is an aquatic electrical barrier that has the electrodes configured in a matrix array configuration, where each electrode element of the matrix array is mounted either directly on the bottom of a water channel or on extendable rods; the matrix array is controlled so that aquatic species may be physically moved by the aquatic species physiological response to a time-varying and spatially-varying electrical field.

Abstract: The inventive subject matter describes systems and methods for the implementation of an aquatic acoustical barrier, the aquatic acoustical barrier having a multiplicity of acoustical layers, the acoustical layers further having a multiplicity of acoustical leafs, such that when the acoustical barrier surrounds a noise source in the water there is an attenuation created by the noise source.

Abstract: The inventive subject matter describes systems and methods for the implementation of an aquatic acoustical barrier, the aquatic acoustical barrier having a multiplicity of acoustical layers, the acoustical layers further having a multiplicity of acoustical leafs, such that when the acoustical barrier surrounds a noise source in the water there is an attenuation created by the noise source.

Abstract: A method and apparatus are set forth for monitoring lamp condition, comprising directing a beam of light at the lamp, detecting percent transmission of the beam through the lamp, wherein the percent transmission is indicative of lamp blackening, and repeating the directing and detecting of the beam of light periodically to provide an indication of lamp blackening over time, wherein the lamp blackening thereby provides an indication of lamp condition over time.

Abstract: Described herein is an apparatus for the entrainment of fish from seachests having an anode, a cathode, a support structure for the anode and cathode proximate to the hull of a ship, such that when an electric current passes from the anode to the cathode, fish are entrained from entering a seachest.

Abstract: A light production system and apparatus for adjusting the uniformity of light is provided. The apparatus comprises a light reducing portion, having an area less than that of an exit of an integrator, for reducing the brightness of a central area of light emitted from the exit. The apparatus further comprises a mounting portion for mounting the light reducing portion in general longitudinal alignment with a center of the exit, the mounting portion enabled to transmit the light emitted from the exit.

Abstract: A light production system and apparatus for adjusting the uniformity of light is provided. The apparatus comprises a light reducing portion, having an area less than that of an exit of an integrator, for reducing the brightness of a central area of light emitted from the exit. The apparatus further comprises a mounting portion for mounting the light reducing portion in general longitudinal alignment with a center of the exit, the mounting portion enabled to transmit the light emitted from the exit.

Abstract: A filter cartridge according to aspects of the present invention positions the outside diameter of the filter element adjacent the inside of the filter cartridge housing. The larger outside diameter of the filter element expands the surface area of filter medium presented to fuel entering the filter cartridge. Positioning the outside diameter of the filter element near the inside surface of the cartridge housing promotes an axial fuel flow pattern across the outside surface of the filter media. This flow pattern is believed to sweep water from the surface of the filter media toward the sump of the cartridge. The flow pattern causes water droplets that coalesce on the outside of the filter media to combine into larger droplets, which then fall into the sump of the cartridge.

Abstract: An improved strap design is provided for to reducing edge reflections in tiled video cubes. More particularly, a groove is notched on the outside of the strap into which bonding compound is injected for bonding the screen mounting surface to the video cube. In addition to eliminating edge reflections, the new strap design also provides a clearer bond, without voids and cutting debris trapped between the side strap and clear screen mounting surface. Crazing is also reduced with the new bond, and there is no excessive machining requirement to create the groove in the strap, thereby saving on construction time.

Abstract: An apparatus for collecting and sensing light in a projector, comprising a cold mirror positioned directly in the incident light path from a lamp and illumination optics of the projector for reflecting a large portion of visible light towards a light imaging device while transmitting IR and UV light and a small portion of the visible light; a secondary mirror for reflecting the small portion of the visible light, an integrating box positioned to collect and integrate the small portion of visible light, a light tube in optical communication with the integrating box for further integrating and attenuating the small portion of visible light, and an electro-optic device within the light tube for measuring the small portion of visible light within the light tube and generating an electrical signal in response thereto.

Abstract: An apparatus for collecting and sensing light in a projector, comprising a cold mirror positioned directly in the incident light path from a lamp and illumination optics of the projector for reflecting a large portion of visible light towards a light imaging device while transmitting IR and UV light and a small portion of the visible light; a secondary mirror for reflecting the small portion of the visible light, an integrating box positioned to collect and integrate the small portion of visible light, a light tube in optical communication with the integrating box for further integrating and attenuating the small portion of visible light, and an electro-optic device within the light tube for measuring the small portion of visible light within the light tube and generating an electrical signal in response thereto.

Abstract: A cartridge seal having a sleeve for fitting over a pump shaft and, at one end region of the sleeve, a stationary seal whose floating component is biased towards its static component. The cartridge further includes a member longitudinally spaced from the seal, which member and the stationary seal are moveable longitudinally relative to one another. The floating component is biased away from said member and towards the static component, means being provided to limit separation of said member and the stationary seal. The invention therefore provides a complete mechanical seal in one cartridge.

Abstract: A mechanical seal 30 is disclosed comprising a sleeve 32 which is adapted to be affixed to the shaft 34 of a item of mechanical equipment, together with a rotary component 42 which carries a rotary seal face 44. Two O-ring grooves 46, 48 are provided on the sleeve 32, the first 46 being remote from the rotary seal face 44 and cut somewhat deeper into the sleeve 32 than the second 48. The rotary component 42 has a first region 50 remote from the rotary seal face 44, the inner surface of which has a relatively small diameter and a second region 52 between the first region 50 and the rotary seal face 44, the inner surface of which has a larger diameter. A pair of O-rings 54, 56 are located in the O-ring grooves 46, 48 and seal against the inner surface of the rotary component 42. The net thrust, if any, acting on the rotary component 42 and hence on the rotary seal face 44 tends to close the seal face irrespective of whether the barrier fluid pressure is in excess for less than the product pressure.