Apparatus is disclosed for pre-treating and spectrally analyzing a sample of matter, including a structure for promoting reaction of an analyte to produce characteristic effects of the analyte measurable by an optical analysis device. The structure defines a sheltered region for containing the analyte, a support surface within the region for supporting a filtering medium, an exposure path for exposing the analyte to an energy source and an optical path leading out of the sheltered region along w...

A method for accessing a subterranean zone from the surface includes drilling a substantially vertical well bore from the surface to the subterranean zone and forming a slot cavity in the substantially vertical well bore proximate to the subterranean zone. The slot cavity comprises a substantially non-cylindrical shape. The method also includes drilling an articulated well bore from the surface to the subterranean zone. The articulated well bore is horizontally offset from the substantially vert...

The invention relates to a cavity tray for use in a cavity wall, comprising two spaced apart flanges each adapted in use to lie in or adjacent a respective skin of the wall, a connector connecting the two spaced apart flanges, and an arcuate transitional part leading to at least one flange whereby a super- or sub-posed damp-proof men, her may be adhered thereto with substantially no discontinuity.

A golf putter is formed with a hollow box open towards its striking face which is tautly covered with a layer or two of leather. The cavity in the box behind the leather is filled with a displaceable material such as sand or liquid. The leather indents on striking a golf ball to provide more "feel" and accuracy.

A rock cavity for storing fluids, solid products for some other purpose, such as the protected manufacture or production of goods, comprising a substantially vertical, cylindrical rock cavity comprising a conical top section (14), and a conical or horizontal bottom section (15) and a vertical section (1) extending therebetween and presenting in cross-section a polygonal shape, wherewith vertical shafts (11) are located in at least half the corners of the polygon.

A cavity vertical turbine includes a rotatably driven electric generator or air compressor, a drive shaft operably connected to the electric generator or air compressor to cause rotation thereof, a first member having a cavity vertical surface and being connected to the shaft such that the cavity vertical surface opposes the drive shaft such that the cavity surface opposes the drive shaft in a spaced relation therefrom, a second member having a cavity surface and connected to the shaft such that...

The present invention relates to a cavity filter (20) that includes a plurality of centre conductors which are mounted on an elevation (22) that extends along several cavities. The elevation can be produced on the bottom surface (23) of the cavity body (21) to a high degree of flatness in one single working step, and a precise measurement and precise parallelity between said bottom surface and the side walls (25) of the cavities can be obtained.

In an output resonant cavity used with a linear electron beam tube such as an IOT, magnetic material is mounted on walls of the cavity and defines annular channels within which coils are located to provide focusing of an electron beam travelling along the axis of a tube located in apertures in the cavity walls. An inner rim locates the electron beam tube with respect to the cavity.

A non-monolithic ring laser cavity comprising: (a) a gain medium (1); (b) a first polarization rotation element arranged to rotate the polarization of light propagating in the cavity with a predetermined handedness irrespective of the direction of propagation of the light; (c) a second polarization rotation element (7) arranged-to rotate the polarization of light propagating in the cavity with a handedness which is dependent upon the direction of propagation of the light; (d) a polarization sele...

A method for oil filling an internal pressure sensor cavity (20) is disclosed which minimizes manufacturing process time and insures totally and properly filling the internal cavity with oil. A predetermined amount of oil (23) is added to a pressure sensor external cavity (21) connected through an opening (22) to an internal sensor cavity (20) having a sensing element (17) therein. A vacuum is drawn while the oil is in the external cavity thus providing at least a partial vacuum in at least the ...