Abstract: This fluorescent display tube includes an anode and a plurality of filament-shaped cathodes both provided in an envelope, a support as one of a pair of support bodies which support the cathodes is electrically divided for each of the cathodes and at the time of driving, and a cathode driving IC gives pulse voltages to the cathodes at different timing. Since the voltages are applied to the arranged cathodes sequentially, current flowing through the cathode driving IC can be small as compared with a case where voltages are simultaneously applied to a plurality of cathodes. Heat generation of the cathode driving IC is suppressed, and costs required for the cathode driving IC are reduced.

Abstract: This fluorescent display tube includes an anode and a plurality of filament-shaped cathodes both provided in an envelope, a support as one of a pair of support bodies which support the cathodes is electrically divided for each of the cathodes and at the time of driving, and a cathode driving IC gives pulse voltages to the cathodes at different timing. Since the voltages are applied to the arranged cathodes sequentially, current flowing through the cathode driving IC can be small as compared with a case where voltages are simultaneously applied to a plurality of cathodes. Heat generation of the cathode driving IC is suppressed, and costs required for the cathode driving IC are reduced.

Abstract: A fluorescent display device is disclosed. The fluorescent display device includes an anode plate, aluminum anode wirings arranged on the anode plate, a first light shielding aluminum film arranged on the anode plate, an insulation layer arranged on both the anode wiring and the first light shielding film, a second light shielding graphite film arranged on the insulation layer, an anode electrode arranged on the insulation layer, and an outer light source display formed by removing a portion of the first light shielding film. The outer light source display is illuminated by a LED to display a predetermined pattern. The second light shielding film is formed along a wiring array arranged on the first light shielding film and the wiring so that a gap between the first light shielding film and the wirings is covered with the second light shielding film.

Abstract: A fluorescent display device is disclosed. The fluorescent display device includes an anode plate, aluminum anode wirings arranged on the anode plate, a first light shielding aluminum film arranged on the anode plate, an insulation layer arranged on both the anode wiring and the first light shielding film, a second light shielding graphite film arranged on the insulation layer, an anode electrode arranged on the insulation layer, and an outer light source display formed by removing a portion of the first light shielding film. The outer light source display is illuminated by a LED to display a predetermined pattern. The second light shielding film is formed along a wiring array arranged on the first light shielding film and the wiring so that a gap between the first light shielding film and the wirings is covered with the second light shielding film.

Abstract: A fluorescent display device includes an anode plate and a semiconductor device arranged thereon, wherein the anode plate forms a portion of an envelope of the display device and has an anode on an inner surface thereof. The display device further includes a supporting structure and a tensioning member. The supporting structure is disposed on the anode plate and has a top plate portion overlapping the semiconductor device. The tensioning member is disposed on the top plate portion of the supporting structure and serves to arrange a plurality of filament-shaped cathodes at a pitch between the semiconductor device and the top plate portion.

Abstract: A fluorescent display device includes an anode plate and a semiconductor device arranged thereon, wherein the anode plate forms a portion of an envelope of the display device and has an anode on an inner surface thereof. The display device further includes a supporting structure and a tensioning member. The supporting structure is disposed on the anode plate and has a top plate portion overlapping the semiconductor device. The tensioning member is disposed on the top plate portion of the supporting structure and serves to arrange a plurality of filament-shaped cathodes at a pitch between the semiconductor device and the top plate portion.

Abstract: A fluorescent display tube having a structure in which only filament-shape cathodes corresponding to required display regions are selectively supplied with electric power and in which elongated cathode attaching plates are disposed apart from one another on an end of an anode substrate, a first support member is secured to the first cathode attaching plate disposed inwards when viewed in the lengthwise direction of the cathodes, while a second support member is secured to the second cathode attaching plate disposed outwardly. Each support member has a base portion secured to the cathode attaching plate, a securing portion for securing the cathode and a connection portion for connecting the base portion and the securing portion to each other. The plural cathodes are stretched to run parallel to one another. A connection portion of the inner support member is longer than a connection portion of an outer support member. The two support members secure the ends of the cathodes at the same positions.

Abstract: In a spot welder in which the electric charge stored in an electrolytic capacitor (1a) is discharged through a welding circuit 3 to perform a welding operation, in order to prevent the lowering of the welding performance due to the inversion in polarity of the voltage of the electrolytic capacitor (1a), its main circuit includes another electrolytic capacitor (1b) which is connected in series to a DC source (5) and shunted by a resistor (7) and which is substantially equal in capacitance to the aforementioned electrolytic capacitor (1a), and after the electrolytic capacitor (1a) only is charged, a switch (2) is turned on so that the charge current of the electrolytic capacitor (1a) is discharged to charge the electrolytic capacitor (1b), whereby charging the electrolytic capacitors (1a) and (1b) in opposite directions is prevented.

Abstract: A grounded hollow cylindrical housing filled with SF.sub.6 encircles coaxially a rod-shaped electric conductor through a plurality of spaced, electrically insulating spacers. With the housing disposed horizontally, two spaced, hollow frustoconical dielectric members are connected to the inner surface of the housing adjacent to either surface of each spacer to overlap the latter. With the housing disposed vertically, a disc-shaped dielectric member fixedly extends through the conductor to be adjacent and overlap each spacer. Further, an annular dielectric member may be connected to the inner surface of the housing between the disc-shaped dielectric member and the spacer. The dielectric member is preferably of a poly-tetrafluoroethylene.

Abstract: A lightning arrester enclosed in a grounded metal enclosure filled with SF.sub.6 includes six nonlinear resistors of sintered ZnO serially interconnected in superposed relationship between a high voltage conductor and the enclosure through a cylindrical high voltage conductor. The resistors are divided into three equal units and two shield discs are interposed between the adjacent units and connected to respective hollow cylindrical conductors coaxially disposed in radially spaced relationship around the cylindrical high voltage conductor.

Abstract: A stack of nonlinear resistors of sintered zinc oxide superposing one another is connected across a bottom of a grounded cylindrical housing and a high voltage conductor insulatingly supported by the housing. Within the housing a shielding conductor slantingly hangs from the connection of the stack and conductor. Alternatively, the shielding electrode may extend from the high voltage conductor to run along the longitudinal axis of the housing. A plurality of nonlinear resistors are divided in several stacks and serially interconnected between the shielding conductor and the inside of the housing to be radially outward inclined to the shielding electrode. Such stacks may be disposed close to the free end portion of the shielding electrode.

Abstract: In a grounded metallic housing of circular cross section three electrodes are disposed at equal angular intervals in a circle concentric with the housing to extending parallel to the axis of the latter. Three stacks of non-linear resistors are connected at one end to a corresponding one of the electrodes and at the other end to the peripheral edge of the bottom of the housing to be tilted radially outward.