Abstract: An improved toughened blend of an aromatic polyester with from 5 to 20 phr of an impact modifier, which impact modifier is a blend of (a) 80 to 85 weight percent of a core/shell impact modifier having a polybutadiene core and at least one shell formed from methyl methacrylate and styrene; and (b) 15 to 20 weight percent of a linear copolymer which contains from 50 to 85 parts of units derived from ethylene, from 5 to 40 parts of units derived from (meth)acrylic esters, and from 2 to 10 parts of a copolymerizable monomer containing an epoxy group. The toughened blend exhibits higher impact strength than would be calculated for the blend using a linear relationship based on values of notched Izod for two blends, each containing only one of the impact modifiers at an equal use level.

Abstract: The present invention relates to a low level, high resolution imager of the type comprising a light-amplifier tube (300) including a photocathode (310), at least one microchannel slab (330) serving as an electron amplifier, and a light-emitting phosphor screen (340) provided with a metal layer (342), an electron camera (400) comprising a photosensitive matrix array (410) suitable for transforming a received photon into an electron, and control means (700) for the electron camera, characterized by the fact that the control means (700) comprise an amplifier (710) responsive to the electrons collected on the metal layer (342) of the light-emitting phosphor screen (340) to control integration cycles of the photosensitive matrix array (410) in repetitive one-shot mode synchronized on the appearance of photons at the input of the light-amplifying tube (300).

Abstract: A very high resolution radiochromatogram for ionizing radiation comprises at least one array made up of a set of filament-like members adapted to enable spatial marking of a surface to be analyzed according to a specific frame of reference and adapted to detect said radiation by scintillation and to transmit light produced by such detection. The array is formed by two groups of optical fibers. Each fiber is disposed along a respective straight line segment defining two orthogonal directions delimiting an analysis plane or surface. At least one of the groups is subdivided into two elementary groups spaced in a direction perpendicular to the analysis plane or surface. The fibers of the elementary groups are parallel.

Abstract: A psychrometer or pick-up for measuring the content of water in a gas flow comprises a first sensor or probe for measuring the dry temperature of the gas and is arranged directly in the flow of gas, a second sensor or probe for measuring the wet temperature of the gas and is surrounded by a sheath of a material capable of absorbing a volatile liquid, the second sensor or probe with its sheath also being arranged in the flow of gas, a pair of screens mounted on opposite sides of the second sensor and the sheath for protecting the sheath against thermal radiation, and a wetting device, preferably formed by a dosing pump connected to a nozzle, for injecting successive doses of a predetermined amount of the volatile liquid directly into the interior of the sheath and onto the screens to prevent excessive and insufficient moistening of the sheath and the screens.

Abstract: A device for measuring the time interval separating the appearances of two correlated pulses which have independent amplitudes and rise times includes two timing circuits. Each timing circuit includes a time to pulse height converter which is started by a threshold discriminator when the first pulse s passes through a preset amplitude threshold, and stopped by another threshold discriminator when the second pulse passes through the same threshold. The thresholds of the two timing circuits are different, and the output signal of each circuit is related to the duration of the interval to be measured by a respective conversion factor. The ratio of the two thresholds is equal to the ratio of these two conversion factors. A differential output circuit receives the timing circuit output signals and outputs a signal proportional to the difference in their amplitudes, which is also proportional to the duration of the interval to be measured.