Abstract: A single turn potentiometer is constructed as either an open frame or a housed unit. Both units incorporate a helical coil spring wiper mounted within a rotor. In the open-frame unit, the rotor includes a shaft which extends through a corresponding hole on a ceramic substrate. The ceramic substrate cooperates with the rotor and includes a deposited cermet resistance element and a circular collector ring. A stop arrangement is built into the rotor in the open-frame unit. The closed-frame unit includes a housing having a molded-in stop for cooperation with a similar stop on the rotor. In the open-frame unit, the shaft which protrudes through the hole in the substrate is of split configuration and is spread by an insert to hold the rotor to the substrate in riveting fashion. The closed-frame unit employs a peened-over portion of the housing which is used to constrain the assembly. Means and method for affixing the conductor leads to the substrate are disclosed.

Abstract: Isothermal crystal growth of an aqueous solution of an ionizable salt by means of electrolysis of an aqueous solution of the salt.

Abstract: A camera tube employs a target comprising a layer of optically transparent infra-red radiation responsive material and a layer of photoconductive material which is scanned, in conventional manner, by an electron beam. This tube combines the principles of a infra-red image sensor with the more conventional principles of a vidicon target.

Abstract: A method and device for determining acentricities in a powder material by illuminating the powder with a collimated coherent light beam of given wave-length which generates a second harmonic in the material. The second harmonic with the fundamental removed by filters is divided by a beam splitter and sent to two photomultipliers -- one of which has a narrow band filter to select only light of one wave-length. If all the light is generated at the second harmonic equal signals are produced by the photomultipliers. If non-second harmonic radiation is produced, a larger signal will be produced in the unfiltered reference channel.