Abstract: An air-conditioning apparatus for adjusting the direction and quantity of air comprises a duct device forming an air passage passing through the duct device, and an airflow adjusting device. The airflow adjusting device is made from a single thin plate and fitted to the duct device across the air passage to adjust a flow of air. Slits of predetermined patterns are formed on the airflow adjusting device to define a plurality of vanes which are integral to the airflow adjusting device.

Abstract: An air-conditioning apparatus for adjusting the direction and quantity of air comprises a duct device forming an air passage passing through the duct device, and an airflow adjusting device. The airflow adjusting device is made from a single thin plate and fitted to the duct device across the air passage to adjust a flow of air. Slits of predetermined patterns are formed on the airflow adjusting device to define a plurality of vanes which are integral to the airflow adjusting device.

Abstract: An air-conditioning apparatus for adjusting the direction and quantity of air comprises a duct device forming an air passage passing through the duct device, and an airflow adjusting device. The airflow adjusting device is made from a single thin plate and fitted to the duct device across the air passage to adjust a flow of air. Slits of predetermined patterns are formed on the airflow adjusting device to define a plurality of vanes which are integral to the airflow adjusting device. Functions for adjusting the direction and quantity of air are basically realized only with the single thin plate so that the material and manufacturing costs of the apparatus will be reduced, the transportation, installation and maintenance of the apparatus simplified, and angles of the vanes adjusted separately and freely.

Abstract: In apparatus for purifying waste water with activated sludge deposited on carrier particles, in which air is introduced into a treating tank for circulating the waste water and the carrier particles in the tank through an air lift, a separator is provided at an upper end of the tank for discharging purified water together with sludge peeled off from the particles thus leaving bared carrier particles in the tank for recirculation. A portion of the bottom of the tank is inclined to prevent precipitation of the activated carrier particles. The tank has a rectangular cross-sectional configuration to enable to arrange a number of tanks in a juxtaposed relation in series or parallel in a narrow floor space.

Abstract: A nitrogen fertilizer manifesting fungicidal property against Pathogenic fungi contains as its effective component a water soluble initial condensation product prepared by causing formaldehyde to react with urea. The fertilizer may be admixed with one or more of other fertilizers of various types.

Abstract: An improved ignition circuit for internal combustion engines is described herein, in which a diode is connected in parallel to a primary winding of an ignition coil of a magneto, and a composite transistor circuit consisting of two transistors whose forward direction is directed in the reverse direction of said diode, is connected across said primary winding at its collector and emitter, whereby overheating of said transistors caused by a primary reverse current of said magneto ignition coil flowing into the transistors can be prevented and also proper ignition timing can be maintained.

Abstract: In a vertical electric furnace having vertically spaced annular electrodes for regenerating used activated carbon by passing electric current therethrough, the inner cross-sectional area of the furnace is gradually decreased and then gradually increased between the electrodes thus forming a throat. With this construction, layers of the used activated carbon in which the resistance value varies with the temperature gradient are formed.