Kureha Kagaku Kogyo Kabushiki Kaisha

Radio Research Technical, Inc.

Seiichi Suzuki

Takeshi Nomura

Masatomo Shigeta

Hiroshi Hozuma

Tomizo Endo

Naoshi Kawabe

Hisao Takahashi

Yasushi Endo

Kiyoji Ozaki

Naotaka Miwa

Eihachiro Tomita

Haruo Izumida

A capacitor discharge circuit constructed by a combination of a mechanical switch and an electronic switch. The electronic switch is automatically turned on with a predetermined time delay after closing of the mechanical switch. The mechanical switch is used to completely separate a high voltage-large capacity capacitor from a load when the discharge operation is not required. The wear and tear of contacts in the mechanical switch can be avoided by the delayed operation of the electronic switch.

Capacitor discharge circuit

The laminated electric element is composed of a plastic film having at least one of electric properties including dielectric, pyroelectric and piezoelectric properties, and carrying a conductive layer on at least one surface thereof, the plastic film being laminated with a foam layer. Between the plastic film having the conductive layer and the foam layer is provided a middle layer to permit a flat surface on the conductive layer-carrying plastic film. The provision of the middle layer can render the surface of the conductive layer-carrying plastic film or layer flat without causing deformation on the surface thereof by the curved or waved surface of the foam layer and permit an effective utilization of such electric properties in addition to an effective prevention of the electrode layer provided thereon from coming off. Where the electrode layer is provided inside the conductive layer-carrying plastic film, the corrosion of the electrode layer can be prevented effectively. The laminated electric elements having such structure as set forth hereinabove can be employed for a capacitive switch, an infrared sensor, an acoustic transducer or the like.

Laminated electric elements

A decoking apparatus suitable for use on a reaction vessel for the thermal cracking of heavy petroleum oils the apparatus essentially including a rotatable main injection pipe to be disposed in the reaction vessel and having a multitude of jet nozzles along its length, and a second or auxiliary injection pipe positioned in the proximity of the main injection pipe to inject a scrubbing liquid over the outer peripheral walls of the main injection pipe to prevent deposition of coke. The main and auxiliary injection pipes are both supplied with heavy petroleum oil to remove the coke deposition from the reactor wall by the heavy petroleum oil jets from the main injection pipe while wetting the exterior of the main pipe with the heavy petroleum oil injected by the auxiliary injection pipe.

Decoking apparatus

A flow control valve for hot pitch or other viscous material, wherein a valve rod is guided by a guide member which has radial indentations in its center aperture to define a number of narrow axial ridges around the circumference of the valve rod to provide stabilized guidance by linear sliding contact with the valve rod.

Flow control valve for hot pitch or other viscous material

Growing community of inventors

Iwaki, Japan

Seiichi Suzuki