A reference length of electrically conductive material having a predetermined electrical length and impedance permanently inserted in a time domain reflectometer measuring path prior to the connection point to the cable-under-test. Measurement to the start of the reference length is used to establish a reference position within the measurement path for subsequent time domain reflectometry measurements.

A mobile relay station including a mobile base having mounted thereon a mast for holding antenna, the mast being guyed over spreaders and connected to the sides of the base without permanent connection to the ground.

The invention relates to a container for the storage of low-temperature liquids, especially liquefied gases, consisting of an outer container made of reinforced or prestressed concrete, equipped perhaps with a steel dome, and an open inner steel tank, intended to hold the liquid, the steel tank resting on an insulator; an annular space is provided between the two tanks, this space containing a granular insulating material and, in its lower part, a spacer element. In order to protect the steel ta...

An active laser is slaved in an offset frequency relationship to an ultrastable reference laser, by a comparator with a substantially infinite capture range in order to preclude phase-locking on a harmonic or mirror image of the desired offset frequency. The frequency of such a slaved laser is then virtually immune to retro-reflection of its own light back into its resonant cavity, and gains a frequency stability equal to that of the reference. Further, the reference laser is preferably stabiliz...

This invention relates to a process for the application of conducting metallic, structured coatings on glass substrates, for example, for the manufacture of integrated circuits. The invention relies on placing a negative mask of the structure to be applied into the beam path of an excimer laser. After leaving the mask, the laser beam is directed onto a flat silica glass slice, the back side of which is in contact with a reductive copper bath. The process according to this invention requires expo...

An anchor assembly for use in adhesively bonding an anchor consisting of a threaded anchor member having an adhesive release coating its threaded portions and having a hollow end dimensioned to receive the threaded portion connected to the end of the threaded portion and extending from it to provide a space within the adhesive in which the threaded portion of the assembly can be contained.

A centrifuge tube having an indexing tab or indentation on a flange surrounding the tube to establish rotational orientation of the tube with respect to the cavity of a centrifuge.

An assembly for spraying a poultry house or the like with liquid biocide having a frame on which there is a spray manifold connectable to a biocide supply hose, the frame having a single front support in the form of a wheel or a skid and two rear supports in the form of skids, the frame being triangular and having lateral deflector plates mounted on its periphery.

A plug washer useful for holding a vertical stud support member against a masonry wall using studs embedded in the masonry wall at an oblique angle to horizontal, the plug washer having an expanded washer portion which bears against the steel support on one side and a nut on the other, and further having a plug that fits in holes in the support member made to accept the stud, the plug and the washer portion having a hole passing through them at an angle to receive the stud.

A machine such as a centrifugal pump has a rotating impeller which may get out of alignment if there is bearing wear or if the impeller becomes loose on its supporting axle. A misalignment sensing probe and switch may be installed through the housing of the pump with it probe tip in close proximity to the impeller's face. If the rotating impeller migrates out of alignment it will abrade the tip of the sensing probe. Inside the probe body there is secured a stranded insulated electrical conductor...