Abstract: In a mounting structure for mounting a discharge lamp lighting device, a holder provided as a holding member for holding a discharge lamp is separated from securing portions that secure a discharge lamp lighting device to a reflector. The discharge lamp lighting device includes a connector to which a discharge lamp is directly connected. The connector includes a connector housing that receives the discharge lamp. A space can be formed between an inner wall surface of the connector housing and an outer wall surface of the discharge lamp. Another space can be formed around the connector housing.

Abstract: A dust suction head for use in an electric vacuum cleaner, having an air suction port at the bottom of the head. The head has a brush chamber which accommodates therein a freely rotatable brush having blades that extend along the shaft of the rotational brush. The head additionally has an opening and an air passage connected with the opening for taking in and leading fresh air into the vacuum chamber of the cleaner through the brush chamber such that the fresh air passing through the brush chamber impinges on the blades to accelerate the rotational motion of the blades. Thus, the head can obtain a necessary amount of air to rotate the brush at all times, especially when it is brushing a carpet, and maintain its smooth motion on the floor while dusting it.

Abstract: When a discharge lamp repeatedly flickers out after illuminating for a long period of time because the same discharge lamp is nearing the end of its usage lifetime, a stored voltage of a capacitor rises gradually every time the discharge lamp flickers out. When the stored voltage of the same capacitor becomes no less than a predetermined voltage, a comparator generates a high level voltage which actuates a transistor. The transistor then terminates the operations of a PWM circuit to deactuate the discharge lamp.

Abstract: DC/DC converter 31 boosts an output voltage of a battery 1 having a negative terminal grounded to a vehicle body, and supplies a boosted voltage to a discharge lamp 4 interposed between a positive output terminal and a negative output terminal of battery 1. A lamp current detecting resistance 35, connected in series with discharge lamp 4, detects a lamp current flowing through discharge lamp 4. Lamp voltage detecting resistances 33 and 34 detect a lamp voltage applied to discharge lamp 4. An electric power of DC/DC converter 31 is controlled by lamp power calculating circuit 36 and DC/DC converter drive circuit 37 based on the lamp current detected by lamp current detecting resistance 35 and the lamp voltage detected by lamp voltage detecting resistances 33 and 34. Discharge lamp 4 and lamp current detecting resistance 35 are connected at a connecting point "a" which is grounded.

Abstract: A discharge lamp unit which does not require enlargement of the discharge lamp and can still prevent application of a high voltage to a cap holder when the lamp is not connected includes a core of a high-voltage transformer inside a cap of the discharge lamp. Both a primary coil and a secondary coil of the high-voltage transformer are provided around a cap holder of the discharge lamp power supply. The cap of discharge lamp is inserted into the cap holder of the discharge lamp power supply to provide an electromagnetic link between the primary coil and the secondary coil of the high-voltage transformer.

Abstract: An apparatus for mixing a hydrocarbon-containing gas flow with a molecular oxygen-containing gas flow, wherein at least one aqueous medium sealing zone allowing the hydrocarbon-containing gas flow to pass therethrough is provided by sealing a side of said introduced gas flow with an aqueous medium, providing at least one shielding zone for flame propagration, said gas flow is allowed to pass therethrough on a discharge side of said gas flow, and providing means for introducing the molecular oxygen-containing gas flow into a gas mixing zone defined between both of the above zones there to be thoroughly mixed with the hydrocarbon-containing gas flow.

Abstract: A method for mixing a hydrocarbon-containing gas flow with a molecular oxygen-containing gas flow, wherein at least one aqueous medium sealing zone allowing the hydrocarbon-containing gas flow to pass therethrough is provided by sealing a side of introducing said gas flow with an aqueous medium and at least one shielding zone for flame propagation allowing said gas flow to pass therethrough is provided on a side of discharging said gas flow, and the molecular oxygen-containing gas flow is introduced in a gas mixing zone defined between both of the above zones to be thoroughly mixed with the hydrocarbon-containing gas flow.

Abstract: A process for producing a water-absorbing resin, which comprises polymerizing (D) an aqueous solution comprising (A) at least one monomer component selected from the group consisting of an unsaturated carboxylic acid and salts thereof; (B) a compound having two or more unsaturated groups in a molecule; and (C) a compound having two or more functional groups which are capable of reacting with carboxyl groups in a molecule, the polymerization being conducted in such a manner that the following conditions (a) to (c) are simultaneously satisfied: (a) the molar ratio (B)/(C) being in the range of from 2×10−3 to 300, (b) the polymerization being initiated by a redox polymerization initiator, and (c) the maximum reaction temperature being in the range of from 60° to 100° C., and a water-absorbing resin having a degree of reduction in absorption magnification of from 1 to 16, and n absorption magnification under pressure of from 20 to 40.