Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7192217 | Baffle apparatus A baffle apparatus and method for directing fluid flow to reduce damage to an energy dissipating basin that includes an inlet, an outlet, a floor, a sidewall that extends upward from an edge of the floor, and an opposing sidewall that extends upward from an opposing... | 03/20/2007 |
| 7052208 | Discharge control system for a reservoir A discharge control system for a reservoir having a pressure-communicating valve in a valve chamber with the inlet of the pressure-communicating valve connected the reservoir outlet aperture and the outlet of the pressure-communicating valve connected to a discharge... | 05/30/2006 |
| 6755591 | Liquid flow controller device The device is composed of two, horizontally aligned component parts, namely, fixed spinway subtending an angle of 60° and a pivotal wedged-shaped module residing at a specific and constant distance parallel to the spillway face. The wedge-module is designed so that... | 06/29/2004 |
| 6443654 | Hydraulic energy dissipating offset stepped spillway A spillway for use in a sloped embankment which defines a top and a toe. The spillway is adapted to dissipate the kinetic energy of water flowing downwardly from the top of the embankment to the toe thereof in a primary flow direction. The spillway compri... | 09/03/2002 |
| 6409427 | Soil erosion collector A soil erosion collector that fits in a standard two foot drainage ditch. It is preferably formed of pre-cast reinforced concrete. Its purpose is to separate eroded soil in storm run off. The soil Erosion Collector is designed to create a ponding effect, ... | 06/25/2002 |
| 6379543 | Water treatment system Disclosed is a water treatment system (10) including: (a) a water permeable wall portion (12) defining a water treatment portion (18) of a waterway to be treated; and (b) a treating portion (20) retained in a desired position relative to the permeable wall por... | 04/30/2002 |
| 6106729 | Aeration assembly for dam sites An apparatus for aerating water contained at a dam site includes a force main pipe for receiving water from a dam site water reservoir therethrough and a dam aeration assembly in communication with the force main pipe. The dam aeration assembly, via an ar... | 08/22/2000 |
| 6059490 | Hydraulic energy dissipating offset stepped spillway and methods of constructing and using the same A spillway for use in a sloped embankment which defines a top and a toe. The spillway is adapted to dissipate the kinetic energy of water flowing downwardly from the top of the embankment to the toe thereof in a primary flow direction. The spillway compri... | 05/09/2000 |
| 6053665 | Silt fence fabric, apparatus and method A silt fence fabric with an enlarged edge fits into a slotted blade edge, and is paid out through the slot into the ground as the blade cuts a slit in the ground.... | 04/25/2000 |
| 5993111 | Method and system for flood irrigation The system includes a plurality of flood plains. Each flood plain contains a plurality of plants and each plant is held in a pot. The flood plains are excavated at different elevations from an upper most elevation to a lower most elevation. The flood plai... | 11/30/1999 |
| 5882144 | Device and method for triggering the destruction of a selected part of a hydraulic structure, such as a levee, a dike or a backfilled dam, and hydraulic structure comprising such a device This device for triggering the destruction of a selected portion (1 or 11) of a hydraulic structure such as an embankment dam, dike, or levee built out of erodible material so as to be destroyable by hydraulic erosion is constituted by at least one massiv... | 03/16/1999 |
| 5674029 | Weir A weir structure for controlling liquid flow in a channel having a floor and side walls comprising a barrier extending between the sidewalls of the channel and from the floor of the channel to a crest to separate the channel into an upstream region and a ... | 10/07/1997 |
| 5642963 | Spillway gate system A spillway gate system for use as a navigation dam in which individual spillway gates may be serviced. The spillway gate system comprising a spillway including abutments at opposite ends thereof; wherein at least one of the abutments includes a cavity the... | 07/01/1997 |
| 5584599 | Modular barrier system with interconnected sandbags A modular barrier system and component bags are provided characterized by the component bags being stacked in layers and interconnected to form a retaining wall. Each bag is constructed of a woven tubular sheet that has a rectangular shape when pressed fl... | 12/17/1996 |
| 5496472 | Method and apparatus for denitrification of wastewater This invention relates to a method and apparatus of denitrification. The apparatus includes a weir block, a denitrification vessel having a wall surface, and filter media having microorganisms on their surfaces. The weir block may have a convex outer surf... | 03/05/1996 |
| 5433555 | Wicket dam and lifting jack The arrangement includes a downstream jack pivotably mounted about an axis in the floor of the dam and a rotating abutment member carried by the wicket for receiving an end of a jack piston rod. The jack is restored to an end angular orientation when the ... | 07/18/1995 |
| 5195846 | Spillway for discharging extraordinary floods at dams having at least two flood discharge structures For the purpose of providing a more economical alternative to conventional control gates for the quasi-permanent closure of all or part of the length of the overflow spillway of a dam except when discharging extraordinary floods, the invention consists of... | 03/23/1993 |
| 5061118 | Overflow spillway for dams, weirs and similar structures For the purpose of effecting a quasi-permanent raising of the normal water level of an impounded reservoir and thereby augmenting its storage capacity except during the passage of major floods, the invention consists of rigidly fixing to the sill of the s... | 10/29/1991 |
| 5032038 | Overflow spillway for dams, weirs and similar structures For the purpose of effecting a quasi-permanent raising of the normal water level of an impounded reservoir and thereby augmenting its storage capacity except during the passage of major floods, the invention consists of installing on the sill of the spill... | 07/16/1991 |
| 4797028 | Beaver control siphon apparatus A siphon apparatus for hindering beavers from blocking the inlet of a flood control riser in a water reservoir. The siphon apparatus includes a first conduit for being positioned within the riser, the first conduit having a lower end and an upper end; a s... | 01/10/1989 |
| 4786419 | Method and device for improving the reoxygenation of water in line with barrages A method and device are provided for improving the reoxygenation of water in line with dams. At the crown of the dam a plurality of studs are disposed which form a comb and cause thorough division of the overflowing sheet of water. This sheet of water und... | 11/22/1988 |
| 4662782 | Culvert beaver block In a situation where animals, such as beavers, attempt to flood lands by blocking culverts or constructing dams across waterways, a device is used to maintain a constant flow of water through the dam or culvert. An elongated pipe or culvert with a downwar... | 05/05/1987 |
| 4368121 | Dam spillway A dam spillway for the passage of water from a forebay to an afterbay comprises a means for compressing the atmospheric air by the passing water and a floatation chamber connected to said means. The floatation chamber incorporates a froth separating cavit... | 01/11/1983 |
| 4352593 | Dam spillway A dam spillway to pass water over the crest from a forebay into an afterbay comprises a mixing chamber communicating with a diffuser; said mixing chamber has an intake arrangement ensuring formation downstream of the diffuser of a flotation zone with a fr... | 10/05/1982 |
| 4184786 | Earth dam protective covering Method and means for protecting earth dams from failure caused by overflow or internal (tunnel) erosion. The invention provides a barrier between the dam and the impounded water in the form of a water-impervious covering for the vulnerable surfaces of the... | 01/22/1980 |
