Abstract: A raw material prepared by washing a phosphor powder containing a phosphor host material and an activator with an acid solution, followed by drying the washed powder, is heated within a thermal plasma at a temperature which permits partially melting the phosphor, followed by cooling and subsequently subjecting the resultant phosphor at 1200.degree. to 1700.degree. C., thereby manufacturing spherical phosphor particles having a concentration gradient in a radial direction.

Abstract: A microstrip transmission line device wherein if there is a difference between absolute transmission delay times tpd of two signals to be transmitted over two strip conductors, for example, if a clock signal for tpd=83.3 or 76.9 ps/cm and a data signal for tpd=63.3 or 56.9 ps/cm are to be transmitted, a transmission delay time tpd per unit length of one strip conductor is adjusted by disposing a dielectric just under the one strip conductor, the dielectric having a predetermined relative dielectric constant (in this case, .epsilon.r=5.0 or 4.0) different from a relative dielectric constant (in this case, .epsilon.r=9.0 or 8.0) of a dielectric just under another strip conductor by an amount corresponding to a difference between absolute transmission delay times tpd of the one strip conductor and the other strip conductor. In this manner, the lengths of the two strip lines are made equal.

Abstract: A gas analyzing apparatus comprises a light source (34) emitting an infrared luminous flux; a sample cell (38) which is arranged such that a sample gas is introduced therein and the infrared luminous flux emitted from the light source (34) is transmitted therethrough; and detection means (10a, 10b) which contain absorbers and are arranged such that the infrared luminous flux transmitted through the sample cell (38) passes through the absorbers and an increase in pressure according to the temperature within each of their absorber containers raised upon absorption of the infrared luminous flux by each absorber is optically detected so as to measure, based on the increases in pressure, concentrations of ingredients to be measured in the sample gas, wherein, as the absorbers contained in the detection means (10a, 10b), gases having ingredients identical to the ingredients to be measured are used, respectively.

Abstract: An optical system for a high-sensitivity reflectivity measurement equipment having a simple structure enhances the light utilization efficiency and simplifies the production process and reduces the cost.An aspherical concave mirror with a predetermined range opened at the central portion and one focal point set on the outside of the end surface of the opening is used. The region width of the mirror surface measured from the plane the opening is so determined that the incident light from a proper light source and reflected by the mirror surface to enters the sample placed at the focal point at an incident angle .theta. where 60.degree..ltoreq..theta.<90.degree.. The incident light is reflected by the aspherical concave mirror and the sample surface and again by the aspherical concave mirror so as to become outgoing light for detection. Thus, appropriate and efficient incidence of light to the sample is enabled by a very simple structure having the aspherical concave mirror as the main element.

Abstract: A carrier bag for a motorcycle including a soft body and a hard cover hinged together to form a case enclosure. The soft body is of cloth while the hard cover is of a hard material such as plastic. The soft cover is preferably positioned against the side of the vehicle while the hard cover faces outwardly therefrom.

Abstract: A helmet having a ventilation system which employs a detachable visor. The visor forms an inner chamber which inhibits foreign objects from entering the ventilation passages in the interior of the helmet.

Abstract: A helmet comprising a shell having a viewing window defined in a front portion thereof and a mouth opening defined therein below the window, a windshield detachably mounted on the shell for covering the window, and a mouth cap detachably mounted on the shell for covering the mouth opening. The face shield is movable back and forth with respect to the shell.

Abstract: A helmet principally for use with motorcycles and the like having vent openings on the front thereof. The vent openings are positioned within ram cavities formed between the visor and adjacent guide plates. Passageways extend through attachment mechanisms holding the visor to the helmet. Channels extend through the helmet liner to enhance air flow therethrough. Air ducts may be employed within the channels, providing additional energy absorbing properties to the helmet. Air flow may be further increased by means of a channel extension extending rearwardly from the helmet to advantageously arrange the outlets for maximum flow. An adjustable visor having a transparent visor extension enables selected extension and retraction of the visor to meet road and weather conditions.

Abstract: High-strength, high-workability steel for cold plastic working, obtained by subjecting a hardenable carbon steel to rapid high-frequency induction heating, quenching it, rapidly heating it by high-frequency induction to a temperature of 300.degree.-600.degree. C., and rapidly cooling it. This steel can be cold plastic worked, and then reheated at 300.degree.-500.degree. C. for 30-60 minutes, to obtain a steel having a high elastic limit.

Abstract: High-strength, high-workability steel for cold plastic working, obtained by subjecting a hardenable carbon steel to rapid high-frequency induction heating, quenching it, rapidly heating it by high-frequency induction to a temperature of 300.degree.-600.degree. C., and rapidly cooling it. This steel can be cold plastic worked, and then reheated at 300.degree.-500.degree. C. for 30-60 minutes, to obtain a steel having a high elastic limit.

Abstract: This invention relates to a method for dispersing a suspension of solid particles into the colloidal state, which comprises charging grinding media and said dispersion into a vessel so that the volume ratio of the grinding media and the suspension is within a range of from 2/1 to 1/2 and agitating the suspension and the grinding media by rotating one agitation rod mounted on the tip end of an agitation shaft at the lower part of the central portion of the vessel so that the peripheral velocity of the tip of the agitation rod is within a range of from 6 to 20 m/sec. The invention also is directed to an apparatus for practicing this method.