Other

Sandia Corporation

Thomas W Schneider

Gregory C Frye

Kent Bryant Pfeifer

Stephen J Martin

A block ( ) formed with a mold ( ) integral thereto. The mold ( ) is constructed as a mold top half ( ) and a mold bottom half ( ) and filled in situ with cement ( ). The mold halves ( ) are constructed with respective socket and channel structures ) to capture an enlarged end ( ) of a connector ( ) for interlocking one block to a neighboring block. The resulting block ( ) constitutes a one-piece block that can be formed at the installation site using the two-part mold ( ). The interlocked blocks are prevented from removal when moved in either lateral direction, or in the vertical direction.

Interlocking erosion control block with integral mold

An erosion control block having a bore formed therein for engaging with an inflatable plug. The inflatable plugs of plural blocks are cabled together so as to engage a matrix of blocks, and when inflated, the plugs allow the cable to lift the entire matrix of blocks. The matrix of erosion control blocks can be lifted by a crane and installed by the utilization of the cabling system having inflatable plugs attached to the cabling and engagable within central bores formed within each block. The inflatable plugs can be deflated and removed with the cabling from the installed matrix of blocks, and reused.

Inflatable plugs for installing erosion control blocks

A precision cleaning apparatus and method. The precision cleaning apparatus includes a cleaning monitor further comprising an acoustic wave cleaning sensor such as a quartz crystal microbalance (QCM), a flexural plate wave (FPW) sensor, a shear horizontal acoustic plate mode (SH--APM) sensor, or a shear horizontal surface acoustic wave (SH--SAW) sensor; and measurement means connectable to the sensor for measuring in-situ one or more electrical response characteristics that vary in response to removal of one or more contaminants from the sensor and a workpiece located adjacent to the sensor during cleaning. Methods are disclosed for precision cleaning of one or more contaminants from a surface of the workpiece by means of the cleaning monitor that determines a state of cleanliness and any residual contamination that may be present after cleaning; and also for determining an effectiveness of a cleaning medium for removing one or more contaminants from a workpiece.

Precision cleaning apparatus and method

Moisture corrosive gas stream is measured as a function of the difference in resonant frequencies between two acoustic wave (AW) devices, each with a film which accepts at least one of the components of the gas stream. One AW is located in the gas stream while the other is located outside the gas stream but in the same thermal environment. In one embodiment, the film is a hydrophilic material such as SiO.sub.2. In another embodiment, the SiO.sub.2 is covered with another film which is impermeable to the corrosive gas, such that the AW device in the gas stream measures only the water vapor. In yet another embodiment, the film comprises polyethylene oxide which is hydrophobic and measures only the partial pressure of the corrosive gas. Other embodiments allow for compensation of drift in the system.

Acoustic wave (AW) based moisture sensor for use with corrosive gases

A filter system for insertion and assembly in a storm drain collection box. The filter includes a frame having a removable back and legs for easy assembly in the storm drain collection box. The frame includes a bed portion which is telescopic so as to be expandable to accommodate the width of the collection box. A sheet of filter medium is placed on the filter bed and back, and the filter frame is then urged against the front of the collection box by pneumatic cylinders. Silt and other debris collects in the filter compartment until full, and then the excess drainage water overflows unrestricted over the back of the filter frame.

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Plano, TX, United States of America

Thomas W Schneider