Abstract: An animal trap comprising a first frame member made of strong metal rod, generally rectangular in shape and defining a striker bar and an anvil bar connected by side bars, said frame member also having extending bars fixedly connected to the frame at the junction points of the anvil bars and the side bars, extending at a slight angle to the side bars, and ending in end connections, a second frame member similar to the first having similar extending bars ending in end connections, said first and second frame members connected together at the end connections such that their side bars pass each other in close proximity defining X-shaped structures at each end of the trap and such that relative motion may occur from an upper "set" position where the two striker bars lie close to each other to a lower "sprung" position where each striker bar approaches closely to the anvil bar of the other frame member, a metal rod spring device formed of one or more spring coils connected by arms to two rings, said rings encircli

Abstract: A method of obtaining on-line data useful in determining the center of area or centroid of a geometrical area of unspecified shape lying in a larger x-y scan field and having its existence indicated by a level discriminated amplitude or intensity or a parameter measurable in the z-dimension comprising; scanning the x-y field in a known raster pattern and obtaining a series of discrete output voltage pulses related to elemental x-y points in the scan field and having an amplitude related to the amplitude or intensity of the said parameter; generating a series of discrete clock pulses related to elemental x-y points in the scan field; obtaining a series of x and y synchronizing pulses from and related to the x-y scan field; establishing in relation to the clock pulses and the x and y synchronizing pulses a smaller x-y scan field in the form of a rectangular window around the geometrical area in the larger x-y scan field, the boundaries as x-y co-ordinates of the said window being known; identifying, from the se

Abstract: A method for detecting, monitoring or measuring visible and ultraviolet radiation exposure wherein a liquid crystal element covered with a coating layer transparent to the radiation is placed in the path of the radiation to be monitored and then the shift of the spectral reflectance or transmittance of the element is measured, this shift being a measure of the radiation dosage. This shift may be measured using reference liquid crystal elements or a spectrophotometer or similar measuring devices.

Abstract: Apparatus for measuring barometric pressure comprising a housing made of high thermal conductivity metal and defining a cavity therein, a diaphragm of flexible spring type material clamped in position across the cavity dividing it into upper and lower portions, a connecting passage leading from the lower portion of the cavity to the pressure to be measured, electrical means for measuring deflections of the diaphragm and providing a control signal to a power supply, a low boiling point liquid filling part of the upper portion of the cavity in the housing, with vapor from the liquid filing the remaining part, a heating coil positioned in relation to the housing and connected to the power supply controlled by the electrical means such as to bring the temperature of the liquid and thus its vapor pressure to a level to balance the pressures across the diaphragm, thermal insulation encompassing the housing and means for measuring the temperature of the housing and the liquid therein, this temperature being related

Abstract: A photochemical device for conversion of visible light to electricity comprising one or more monolayers of dye material such as chlorophyll, an electron acceptor monolayer of saturated fatty acid between suitable electrode layers, all formed or mounted on a suitable substrate sheet.

Abstract: Apparatus for upgrading and final enrichment of heavy water comprising means for contacting partially enriched heavy water feed in a catalyst column with hydrogen gas (essentially D.sub.2) originating in an electrolysis cell so as to enrich the feed water with deuterium extracted from the electrolytic hydrogen gas and means for passing the deuterium enriched water to the electrolysis cell.

Abstract: A beam analyzing system using a point scattering detector in conjunction with the standard secondary electron collector and imaging system of a scanning electron microscope. The detector consists of a sharp metal (preferably tungsten) tip located centrally in a biased aperture assembly mounted in the specimen stage. By scanning the image within the aperture and collecting the secondary electrons scattered from a controlled region of the tip, the electron beam intensity can be obtained and reconstructed on a display screen.

Abstract: A radar altimeter system for measuring, from an aircraft flying above tropical forest areas, the height of the ground and the height of the forest canopy above the ground comprising a transmitter, a receiver for detecting return pulses from the ground and forest canopy, timing means for measuring the time of arrival at the beginning and end of each received pulse and averaging the said times, means for examining the received pulse duration and preventing pulses with a shorter time duration than a predetermined time from passing further in the system, and means for examining a selected number of pulses and coupling the voltage derived from the received pulse having the longest time of arrival to an output to give an indication of the ground level and the voltage derived from the received pulse having the shortest time of arrival to an output to give an indication of the forest canopy level.

Abstract: A heavy water production stage in a bithermal H.sub.2 S gas - H.sub.2 O liquid exchange plant wherein the cold tower is operated under temperature and pressure conditions such that H.sub.2 S in the liquid phase is formed and is maintained in the separation units (sieve trays or plates) of the cold tower. It has been found that the presence of liquid H.sub.2 S acts as an efficient anti-foaming agent.

Abstract: An interconnection arrangement for a dual temperature isotope exchange process of the type having a first stage made up of a cold tower, a hot tower, a humidifier and a dehumidifier with a recycled gas stream passing in countercurrent isotope exchange relationship with a liquid stream in the said towers and a similar second stage, said first stage having heat exchange means between humidifier and dehumidifier formed of humidifier and dehumidifier recycle loops passing through a heat exchanger, the improvement comprising means for feeding a portion of the liquid passing in the dehumidifier recycle loop of the first stage to the top of the humidifier of the second stage, means for feeding the liquid passing through the humidifier of the second stage back to the dehumidifier recycle loop of the first stage, and means for passing a portion of the liquid from the first stage in heat exchange relationship with the liquid in a dehumidifier recycle loop of the second stage.

Abstract: A transducer for mounting on the rocker arm used for operating the unit injectors of diesel engines comprising a bowed strip of metal, a strain gauge element rigidly attached to a central portion of the inner or outer surface of the bowed element, an encapsulation layer of epoxy resin covering the strain gauge element and the bowed strip over most of its central extent, the ends of the bowed strip being adapted for rigid fixing into two openings spaced apart in the longitudinal direction in the surface of the rocker arm structure of a diesel engine.

Abstract: A dual temperature isotope exchange process of the type having a first stage comprising a hot and a cold tower with liquid and gas passing in countercurrent exchange relation therein, the gas being recycled from the top of the cold tower to the bottom of the hot tower via a humidifier section through which a liquid stream also passes, a dehumidifier between hot and cold towers through which both gas and liquid streams pass, the improvement comprising the feeding of the inlet feed liquid at a raised temperature to the top of the humidifier section that is, to a point between the liquid outlet of the hot tower and the liquid input to the humidifier and the recycling of a portion of the liquid leaving the hot tower to the top of the cold tower preferably via a cooling device.

Abstract: A process for hydrogen isotope exchange and concentration between liquid water and hydrogen gas, wherein liquid water and hydrogen gas are contacted, in an exchange section, with one another and with at least one catalyst body comprising at least one metal selected from Group VIII of the Periodic Table and preferably a support therefor, the catalyst body has a liquid-water-repellent, gas permeable polymer or organic resin coating, preferably a fluorinated olefin polymer or silicone coating, so that the isotope concentration takes place by two simultaneously occurring steps, namely, ##EQU1## WHILE THE HYDROGEN GAS FED TO THE EXCHANGE SECTION IS DERIVED IN A REACTOR VESSEL FROM LIQUID WATER THAT HAS PASSED THROUGH THE EXCHANGE SECTION.