Abstract: An electronic horn for use, e.g., in a vehicle, includes a piezoelectric element (52) that excites a plate-shaped oscillator (51). A resonator (7) is provided with an opening (71) and covers forward of the oscillator such that a resonance space (S) is defined between the resonator and the oscillator. An inner cylinder (62) and an outer conical housing (63) are provided concentrically around the resonator. A circular cover (8) covers the inner cylinder (62) and the outer conical housing (63) from the front, such that a buffer chamber (BR), at least one first sound amplifying chamber (MH1), and a second sound amplifying chamber (MH2) are defined around an entire circumference of the opening of the resonator.

Abstract: An electronic horn includes a cover (8) on a front side of an intermediate element (6). A first passage (P1) within the horn is defined by a central portion (82) of the cover (8) that projects into a cylindrical interior of a cylindrical water-proofing wall (621). Second passages (P2, P3, P4) extend generally concentrically with respect to the first passage (P1) and are respectively defined by water-proofing walls (83, 84) that are formed on the cover (8) and project into the interior spaces of water-proofing walls (622, 633). The outermost second passage (P4) opens toward the forward direction. The first and second passages (P1-P4) extend in a back-and-forth path that prevents any rainwater, which has entered the interior of the horn through the opening of the outermost second passage (P4), from reaching a resonance space (7) defined between the resonator (7) and a sound-generating oscillator (51).

Abstract: An electronic horn for use, e.g., in a vehicle, includes a piezoelectric element (52) that excites a plate-shaped oscillator (51). A resonator (7) is provided with an opening (71) and covers forward of the oscillator such that a resonance space (S) is defined between the resonator and the oscillator. An inner cylinder (62) and an outer conical housing (63) are provided concentrically around the resonator. A circular cover (8) covers the inner cylinder (62) and the outer conical housing (63) from the front, such that a buffer chamber (BR), at least one first sound amplifying chamber (MH1), and a second sound amplifying chamber (MH2) are defined around an entire circumference of the opening of the resonator.

Abstract: An electronic horn includes a cover (8) on a front side of an intermediate element (6). A first passage (P1) within the horn is defined by a central portion (82) of the cover (8) that projects into a cylindrical interior of a cylindrical water-proofing wall (621). Second passages (P2, P3, P4) extend generally concentrically with respect to the first passage (P1) and are respectively defined by water-proofing walls (83, 84) that are formed on the cover (8) and project into the interior spaces of water-proofing walls (622, 633). The outermost second passage (P4) opens toward the forward direction. The first and second passages (P1-P4) extend in a back-and-forth path that prevents any rainwater, which has entered the interior of the horn through the opening of the outermost second passage (P4), from reaching a resonance space (7) defined between the resonator (7) and a sound-generating oscillator (51).

Abstract: A heat storage tank 10 includes a heat a body valve 4 having an inflow side passage 41 and an outflow side passage 42 and fitted into an open portion 11 of the heat storage tank, a center pipe 5 communicating with the outflow side passage and extending substantially vertically inside the tank and a mixing prevention plate 6, 60 for preventing mixing of cold water flowing in and hot water stored, wherein a through-hole 63 penetrating through the center pipe and a large number of flow holes 64 are formed in the mixing prevention plate, and the prevention mixing plate has a diameter D2 smaller than a diameter D1 of the open portion 11 of the tank.

Abstract: A heat storage tank, comprises an inner cylinder 81 having a storage section 811 for storing liquid, an opening 812 at a lower position of the storage section 811 and a body 84 in which a liquid inflow channel 841 and a liquid outflow channel 842 are formed. The body blocks the opening 812. When the inner diameter of the inner cylinder 81 is referred to as a tank inner diameter D and the vertical length of the storage section 811 is referred to as a tank height H, D/H?0.5 holds. Therefore, the storage section 811 is elongated in the vertical direction and the distance between the body 84, which is a main heat radiating portion, and the high temperature water region is increased and, as a result, the high temperature water region is extended in the vertical direction.

Abstract: An exhaust gas heat exchanger includes exhaust gas tubes through which exhaust gas generated by a combustion flows and cooling water tubes through which cooling water for cooling exhaust gas flows. Plural segments of offset fins are disposed within each exhaust gas tube to be arranged staggeringly in a tube longitudinal direction. The cooling water tubes communicate with each other through cooling water communication passages disposed on both end sides of each exhaust gas tube in the tube longitudinal direction at diagonal positions when being viewed from a minor-diameter direction of each exhaust gas tube. The segments are tilted relative to the tube longitudinal direction toward a side opposite to a diagonal line (L1) connecting the cooling water communication passages. Thus, a cross angle between the tilt direction of the segments and a main flow of the exhaust gas becomes smaller, and a pressure loss in the exhaust gas tubes is reduced.

Abstract: On manufacturing a low voltage electron beam excitation phosphor display apparatus (10) which includes an anode (6) having a principal surface and enclosed in a vacuum chamber (1, 2, and 3), a phosphor film (7) formed on the principal surface, and a cathode (9) enclosed in the vacuum chamber opposite to the phosphor film, a phosphor is prepared which consists essentially of an oxisulfide and an oxide which is inevitably formed on a surface of the oxisulfide on preparing the phosphor. The oxisulfide is represented by Ln.sub.2 O.sub.2 S:R, where Ln is at least one selected from a group consisting of Gd, La, Y, and Lu and where R is a rare-earth element. The oxide is removed from the phosphor to produce an oxide-removed phosphor. A pasts comprising a mixture of the oxide-removed phosphor, a conductive material, and an autolytic type binder is coated on the principal surface of the anode which is formed on an insulating substrate (1) constituting the vacuum chamber.

Abstract: An indium borate phosphor of this invention is represented by formula (In.sub.l-a-b-c-d Tb.sub.a Eu.sub.b Sm.sub.c M.sub.d)BO.sub.3 wherein[1] if b.noteq.0 and c.noteq.0,1.times.10.sup.-6 .ltoreq.a.ltoreq.1.times.10.sup.-20<b.ltoreq.1.times.10.sup.-10<c.ltoreq.1.times.10.sup.-31.times.10.sup.-7 .ltoreq.d.ltoreq.1.times.10.sup.-2[2] if b=c=0,1.times.10.sup.-6 .ltoreq.a.ltoreq.1.times.10.sup.-11.times.10.sup.-7 .ltoreq.d.ltoreq.1.times.10.sup.-2and M is at least element selected from the group consisting of Ti, P, Si, and Ge. This phosphor has a higher bonding force between BO.sub.3 ions and ions of In or any other contained metal than that of a conventional indium borate phosphor. As a result, the current-brightness and burning characteristics of the indium borate phosphor can be greatly improved.

Abstract: A red-emitting phosphor represented by a general formula (Y.sub.1-x-y Cr.sub.x Gd.sub.y).sub.3 (Al.sub.1-z Ga.sub.z).sub.5 O.sub.12 with the provide that 0.0005.ltoreq.x.ltoreq.0.05, O.ltoreq.y.ltoreq.1, O.ltoreq.z.ltoreq.1, providing red- and infrared emitting luminescence, using alone or in a mixture with other phosphors in a cathode ray tube, having a constant main emission peak even if excited by a high current density, having a satisfactory luminescence efficiency, and causing less brightness saturation in proportion as a current density increases.

Abstract: A method of reclaiming a phosphor from a recovered phosphor slurry containing carbon, a bichromate, and polyvinyl alcohol, comprises, (a) a decomposition treatment step of adding an alkali to the recovered phosphor slurry after the slurry is heated to prepare a phosphor suspension having an alkali concentration of 0.5N or less in the slurry, and adding an oxidizing agent in an amount of 1.0 to 20.0 wt % with respect to a dry solid component of the suspension, (b) a weak acid treatment step of separating a phosphor from the suspension, and adding a weak acid to a suspension obtained by adding water to the separated phosphor, thereby adjusting a pH to be 3.0 to 5.0, and (c) a surface treatment step of treating the surface of the phosphor separated from the suspension.

Abstract: Phosphors capable of emitting substantially white luminescent were represented by the following general formulae, (I), (II) and (III).(Y.sub.1-X-Y-Z Lu.sub.X Tb.sub.Y Sm.sub.Z).sub.2 O.sub.2 S (I)0<X.ltoreq.5.times.10.sup.-21.times.10.sup.-3 .ltoreq.Y.ltoreq.t.times.10.sup.-30.ltoreq.Z.ltoreq.5.times.10.sup.-2(Y.sub.1-a-b-c Yb.sub.a Tb.sub.b Sm.sub.c).sub.2 O.sub.2 S (II)wherein:0<a.ltoreq.5.times.10.sup.-41.times.10.sup.-3 .ltoreq.b.ltoreq.5.times.10.sup.-30.ltoreq.c.ltoreq.5.times.10.sup.-2(Y.sub.1-d-e-f Ce.sub.d Tb.sub.e Sm.sub.f).sub.2 O.sub.2 S (III)wherein 0<d.ltoreq.1.times.10.sup.-4 .times.10.sup.-3 .ltoreq.e.ltoreq.5.times.10.sup.-30.ltoreq.f.ltoreq.5.times.10.sup.