Abstract: Molten slag fresh from a smelting or refining furnace is ladled into a pan on a wheeled carriage and is thereby transported to a first heat recovery station, where water is heated by radiation from the slag while the latter is being agitated and granulated. On granulation the slag is conveyed as by a skip hoist to a second heat recovery station, where the residual heat of the slag is utilized to heat air by convection. The heated air is directed into a utility device such as a boiler, from which the cooled air is fed back to the second heat recovery station for reheating. Several embodiments are disclosed.

Abstract: A solid-state color imaging camera comprises three solid-state image sensors each of which has a two-dimensional array of picture elements arranged with respective predetermined pitches in vertical and horizontal directions. The first, second and third image sensors are used for green, red and blue lights. The optical positioning of the first image sensor is shifted with respect to the second and third image sensors by the half of the picture element pitch in the vertical direction.

Abstract: A photoelectric device comprises a signal electrode, a layer of amorphous photoconductor containing 50 atomic percent or more of selenium and an N-type semiconductor layer made of a material selected from the group consisting of oxygen depletion type cerium oxide and oxygen depletion type lead oxide and disposed therebetween, which has a thickness greater than 8 nm and up to and including 500 nm and a Fermi level located within an energy range of 0.2 to 0.8 eV from the bottom of a conduction band.

Abstract: A faceplate structure of a multi-color image pickup tube has a light transmitting thin glass plate, to which are bonded a rectangular color separating filter base plate deposited with a color separating stripe filter at the center of one surface of the thin glass plate with the color separating stripe filter opposing the thin glass plate, and a collar plate having a rectangular through hole for receiving therein the color separating filter base plate. On the other surface of the light transmitting thin glass plate are successively deposited a transparent electroconductive film and a photoconductive film. The faceplate structure is airtightly secured to one open end of an envelope of the image pickup tube with its other surface opposing the inside of the envelope.

Abstract: A method for forming a thin film of cerium oxide as a blocking layer which constitutes a portion of a photoelectric film of a blocking type image pickup tube is disclosed. A substrate deposition rate in a vacuum deposition process is established in a range between 0.01 to 0.6 A/sec to prevent the deposition of particles which result in black or white spots in a picture image. It is more effective to select a particle size of 5 .mu. or more for the primary particles to be deposited.

Abstract: The evaporation boat comprises superposed upper and lower sheets. The upper sheet includes a upwardly convexed central section and a pair of side sections bent back toward the central section and the lower sheet includes a downwardly convexed central section and a pair of side sections bent inwardly toward the upper sheet. The upper and lower sheets are superposed each other such that the central sections of the upper and lower sheets define a substantially closed chamber for accomodating source material to be evaporated, that slit shaped vapor passages are formed between the upper and lower sheets or the opposite sides of the chamber and that any straight line drawn between any point on the surface of the source material and any point in the passages intersects the inner wall of the upper or lower sheets.

Abstract: A photoconductive film comprises a first region containing Se in which Te and an element capable of forming deep levels in Se are added at concentrations lower than 10 atomic % inclusive on average, respectively, a second region disposed on the first region and containing Se in which Te is added with a continuous distribution of concentration having a peak value greater than 15 atomic % inclusive, a third region disposed on the second region and containing Se in which an element capable of forming deep levels in Se is added with a continuous distribution of concentration having a peak value greater than 15 atomic % inclusive, and a fourth region disposed on the third region and containing Se in which Te and an element capable of forming deep levels in Se are added at concentrations lower than 10 atomic % inclusive on average, respectively.