A method of measuring the three-dimensional volume or perimeter shape of an interior cavity includes the steps of collecting a first optical slice of data that represents a partial volume or perimeter shape of the interior cavity, collecting additional optical slices of data that represents a partial volume or perimeter shape of the interior cavity, and combining the first optical slice of data and the additional optical slices of data to calculate of the three-dimensional volume or perimeter sh...

A configuration for sealing or sound-proofing cavities, for example in the vicinity of a chassis or a body of a motor vehicle, includes two half-shells which are separately produced, which can be locked together and which, in an interlocked state, form a free, outwardly open ring-shaped gap in an outer, intermediate peripheral edge region. The ring-shaped gap is inwardly limited by an inner contour on one of the half-shells. A heat-expansible element as a contoured ring-like plate has a form whi...

A mould assembly (60) and a method of use in injection moulding of a part having a functional cavity therein. The mould assembly has a recess (72) to receive a hollow tubular insert (48) intended to be placed in the mould assembly before the injection of a mouldable material into the cavity and to remain in the part after moulding. A gas supply arrangement supplies pressurised gas to the hollow tubular insert at a selected stage during the injection process whereby to form the functional cavity ...

A catheter for the introduction into body cavities is made out of high-molecular material such as plastic, latex or the like and a physiologically compatible external stiffening coating thereon, the stiffening coating comprising a material soluble in body fluids.

The areas of the walls 1 separating two adjacent cavities that are located on the periphery of the opening 3 for allowing through the electron beam, and whose thermal resistance is greatest, are those comprised between this opening 3 and a cavity coupling opening 2. Owing to the opening 3 for allowing through the electron beam (elliptical, centered on the axis of the line 00', with the large axis of the ellipse merging with the axis of symmetry AA' of the coupling openings 2 intersecting the axi...

Instrumentation that can be lowered into an underground cavity to measure the dimensions of the cavity and also, as an added option, the ability to take photographs of the area of interest. The basic structure making up the preferred embodiment has a mounting frame with a television camera, a light beam assembly having two separate aligned light sources, and a mechanism to raise/lower the frame and also to tilt the light beam assembly. Above the ground is an appropriate readout unit which relate...

A re-entrant microwave resonant cavity comprises a stub 6. A cylindrical wall 2, first end wall 3 and the stub 6 are integrally formed. A second end wall 4 is defined by a metallization layer 8 deposited on a printed circuit board substrate 9. The parts are joined using surface mount soldering processes. The end 11 of the stub 6 defines a gap 12. A rostrum 14 faces the end of the stub 6. The rostrum 14 is manufactured separately and then fixed to the substrate 9. A dielectric sphere 16 is locate...

A cleaning sheet is provided. The cleaning sheet includes a fabric layer with a plurality of cavities in at least one major surface. In one embodiment, fabric layer surface secured to a flexible backing layer so as to define an outer fabric surface with a plurality of cavities therein. The cavities can include a tacky bottom surface capable of enhancing the retention of dust and other particles. Cleaning implements and methods of cleaning surfaces using the cleaning sheet are also described.

A system and method for manufacturing micro cavities at the wafer level using a unique, innovative MEMS (MicroElectroMechanical Systems) process, wherein micro cavities are formed, with epoxy bonded single-crystalline silicon membrane as cap and deposited and/or electroplated metal as sidewall, on substrate wafers. The epoxy is also the sacrificial layer. It is totally removed from within the cavity through small etch access holes etched in the silicon cap before the etch access holes are sealed...

A new mode of operation of an optical cavity is disclosed. In this "regenerative pulsation" mode, a substantially nonvarying input yields an output consisting of a train of pulses. Fractional modulations exceeding 90 percent are demonstrated.