tion are sensed and analyzed to produce a display, or otherwise used to control other devices. The apparatus includes an antennae to detect electromagnetic radiation changes caused by an organism coming into contact with the antennae or in a spacial area in proximity of the antennae. The changes detected by the antennae are coupled through a receiver to a bridge network for analysis. The circuitry of the bridge network compares the changes caused by the detected object to a zero reference. An output from the bridge is applied to a process which compares all signals with a vector preset in the process. Amplitude and phase are compared with known characteristics for the presence of a human body. The process or output can then be used to indicate the presence of a human by a display device or to trigger alarm devices or for other purposes.
4865726 DEVICE FOR MAKING POTABLE WATER Iss De Vries, Hnetherlandn assigned to Promac BV
absorption of UV radiation in the range 200 to 400 nm. The absorbance of the UV light by the irradiated eluents across the UV wavelength range is monitored and the integral of absorbance is derived as a function of photon energy across the wavelength range. The magnitude of the derived hategral in at least one time interval corresponding with at least aromatics in the eluent from the stationary phase is measured as an indication of the level of aromatics in the oil sample. The weak solvent may be followed by a strong solvent which, in turn, may be followed by a strong solvent which is modified by the addition of a hydrogen bonding solvent.
4865811 APPARATUS FOR AUTOMATIC CHEMICAL ANALYSIS Raymond Newton, David Malcolm-Lawes, Ware, United Kingdom assigned to Biotec Instruments Limited
A sample duct in a carrier line is isolated by three-way valves blocking the flow of carrier or flushing liquid from reservoirs. The sample duct may be connected to a loading syringe and to a sample reservoir respectively by the valves. When the sample duct is connected into the carrier line, pressurized carrier fluid may convey the sample for analysis through a manifold comprising valves through which reagents may be introduced from reservoirs. The sample then passes through a thermostatically controlled reaction tube to a valve which switches it between waste and an outlet leading to a detector for analysis. The carrier and flushing fluids and the reagents are pressurized by gas from an inlet which is conveyed via an overpressure vent to the reservoir by lines. Rigid inert tubing is used throughout the carrier line, sample duct, manifold and reaction tube.
CHROMATOGRAPHIC ANALYSIS OF HYDROCARBONS
Device for making potable water out of water contaminated by a.o. chemical, biological and nuclear pollutants, as well as by pathogenic bacteria, viruses and normal solid particles, said device being provided by a perforated plate filter, connected to a finer filter in turn coupled to an ultrafilter directly followed by a hyperfilter without interposition of a buffertank and an activated carbon filter, a control device being provided at the ultrafilter's entrance controlled by a pressure switch at the ultrafilter's exit. The control device keeps the pressure at the exit of the ultrafilter approximately constant.
Robert E Overfield, Calgary, Canada assigned to Exxon Research and Engineering Company A sample of a hdyrocarbon oil containing asphaltenes is chromatographically analyzed by forming a mixture of the oil with a weak solvent. The mixture is passed in contact with a column of a stationary phase of find solid particles of fullyfunctionalized material, followed by a weak solvent. The solvent, after recovery from the column, is analyzed for aromatics by UV-
GAS CHROMATOGRAPHY James Lovelock, Cornwall, United Kingdom assigned to Hewlett-Packard Co A photoionization detector having an ionization chamber in which a sample gas can enter and be ionized by ionizing radiation that may be pulsed and with two spaced electrodes as a collector means and also having a plurality of annular electrodes regularly arranged in coaxial relation-