Abstract:
An ultraviolet ray sensor for operating at high temperature includes a gas-filled sealed unit which encloses a photocathode having a spherically-shaped metal crystalline end and a ray collecting means for gathering and focussing incident rays on the photocathode. The sealed unit is made of a ceramic body with one end open to admit ultraviolet rays, that end being sealed by an ultraviolet ray transmissive window, the envelope of this sensor being capable of operating in air without oxidation or release of gas from the inner walls up to temperatures in excess of 600* C.
Abstract:
The rotating anode of an X-ray tube used for medical examination is formed as a hollow member having a portion of its outer surface formed by an X-ray emitting metal and filled with liquid metal which evaporates to provide rapid cooling of the anode and permits operation with larger electron beam powers. The liquid metal is returned to the hot spot by centrifugal force. In one form of the anode a metal mesh is attached to the inner surface of the hollow member to retain liquid metal next to the target metal while the tube is cooling below the melting point of the liquid metal.
Abstract:
A tubular substrate of high electrical resistivity is provided with a metal oxide coating whose resistance increases significantly with ozone concentration in the atmosphere. Electrodes connected to the metal oxide coating at the tube ends provide a means for connection to an electronic circuit for obtaining a signal of level sufficient to operate a meter or alarm device.
Abstract:
An improved x-ray display panel is disclosed wherein the x-rays forming the pattern to be displayed induce ''''ionizing events'''' over the surface of the panel. The photon producing discharges as a result of these events make up a visible image of the x-ray pattern.
Abstract:
A duct for the transmission of an air flow therethrough is provided with a plurality of parallel plates oriented parallel to the air flow. The plates have aligned holes therethrough and are connected to a source of alternating current voltage for generating alternating current electric fields in the region of the holes. The electrical forces generated by the electric fields trap charged particles in the air flow and direct them through the holes to the sides of the duct for collection and subsequent removal. The trapping of the particles is enhanced by coating the plates with a high dielectric strength material.
Abstract:
A duct for the transmission of an air flow therethrough is provided with parallel planar arrays of electrical conductors which are angularly positioned relative to the axis of the air flow. The conductors are parallel to each other and connected to a source of alternating current voltage for generating two dimensional multipolar alternating current electrodynamic fields across the duct. The electrical forces generated by the multipolar fields trap charged particles in the air flow and the orientation of the air flow relative to the angular position of the conductor planar arrays causes the particles to be directed to a side of the duct for collection and subsequent removal. The trapping of the particles is enhanced by coating the conductors with a high dielectric strength material.