Abstract: A power supply apparatus for a welder includes a rectifier (104) and a smoothing reactor (106) which operate together to convert a commercial AC supply voltage to a DC voltage. The DC voltage is converted to a high-frequency voltage by an inverter (108), which, in turn, is voltage-transformed by a voltage-transformer (110). The voltage-transformed, high-frequency voltage is converted to a DC voltage by a rectifying diode (112) and a smoothing reactor (114), and the resulting DC voltage is applied to a workpiece (118a) and a torch (118b). A current detector (120) develops a load current representative signal, and a control circuit (122) so controls a drive circuit (126) which drives the inverter (108) that the load current representative signal becomes equal to a reference current signal provided by a reference source (124). When a small load current is used, a pulse forming switch (140) is repetitively turned on and off to produce a pulse current from a pulse current setting source (139).

Abstract: A conventional audio/video transmission system including an audio/video transmitter apparatus and an audio/video receiver apparatus suffers from delay of video relative to audio resulting from reproducing audio from the audio signal output from the audio/video transmitter apparatus and reproducing video from the video signal output from the audio/video receiver apparatus. To solve this inconvenience, according to the invention, in an audio/video transmission system including an audio/video transmitter apparatus and an audio/video receiver apparatus, the audio/video transmitter apparatus additionally has an audio delay circuit that outputs the input analog audio signal with a predetermined delay time.

Abstract: An IGBT (16) intermittently interrupts a current from a positive terminal (12P) of a DC supply (2) to a workpiece (24). An IGBT (20) intermittently interrupts a current from a negative terminal (12N) of the DC supply (2) to the workpiece (24). A control circuit (32) and a drive signal generating circuit (34) ON-OFF control the IGBTs (16, 20). The control circuit (32) causes the drive signal generating circuit (34) to control the IGBTs (16, 20) in such a manner as to provide a repetition of a cycle consisting of an AC period during which the IGBTs (16, 20) are alternately rendered conductive, and a DC period following the AC period during which the IGBT (16) is rendered continuously conductive.

Abstract: A power supply apparatus for a welder includes a rectifier (104) and a smoothing reactor (106) which operate together to convert a commercial AC supply voltage to a DC voltage. The DC voltage is converted to a high-frequency voltage by an inverter (108), which, in turn, is voltage-transformed by a voltage-transformer (110). The voltage-transformed, high-frequency voltage is converted to a DC voltage by a rectifying diode (112) and a smoothing reactor (114), and the resulting DC voltage is applied to a workpiece (118a) and a torch (118b). A current detector (120) develops a load current representative signal, and a control circuit (122) so controls a drive circuit (126) which drives the inverter (108) that the load current representative signal becomes equal to a reference current signal provided by a reference source (124). When a small load current is used, a pulse forming switch (140) is repetitively turned on and off to produce a pulse current from a pulse current setting source (139).

Abstract: An ophthalmic treatment apparatus includes an electrode which is set on a place to apply electrical stimulation to cells constituting a retina; and an electrical stimulation pulse generator which is connected to the electrode, for generating, from the electrode, a predetermined electrical stimulation pulse whose electric current is set at 20 &mgr;A or more but not exceeding 300 &mgr;A.

Abstract: A power supply apparatus has a case (94) with a control panel (96) mounted thereon. Plural controllers are disposed on the panel (96). A cover (98) is mounted to cover and uncover the panel (96). One (66) of the controllers is so disposed as to be externally operable.

Abstract: A secondary power source, which comprises a positive electrode containing activated carbon and a lithium-containing transition metal oxide, a negative electrode containing a carbon material capable of doping and undoping lithium ions, and an organic electrolyte containing a lithium salt.

Abstract: To provide a recording-reproducing apparatus capable of controlling recorded addresses in a highly-accurate minimum recording unit by using an existing time code in order for recording a signal. The present invention realizes the compatibility of the apparatus with the existing time code and controls the recorded addresses by slightly changing a linear time code signal and assigning a time code corresponding to the minimum recording unit.

Abstract: To provide a recording-reproducing apparatus capable of controlling recorded addresses in a highly-accurate minimum recording unit by using an existing time code in order for recording a signal. The present invention realizes the compatibility of the apparatus with the existing time code and controls the recorded addresses by slightly changing a linear time code signal and assigning a time code corresponding to the minimum recording unit.

Abstract: A secondary power source comprising a positive electrode made mainly of activated carbon, a negative electrode made mainly of a carbon material capable of doping and undoping lithium ions and an organic electrolyte containing a solute of a lithium salt, wherein the lithium salt comprises LiN(SO2Rf1) (SO2Rf2) wherein each of Rf1 and Rf2 which are independent of each other, is a C1-6 perfluoroalkyl group except Rf1═Rf2═CF3.

Abstract: A video production system, which has realized an effective utilization of many existing broadcasting equipments (a time-code generator, an editing controller, etc.) that require a framing with a frequency of 30 Hz and also equipments that function according to a standard of the present time-code defined by a unit of 30 Hz, for a progressive scanning TV format which does not accept a framing by frequency of 30 Hz. An interlaced scanning TV synchronizing signal, which is synchronized of field with a progressive scanning TV signal, is coupled with various kinds of broadcasting equipments (VTRs 102 and 103, a time-code generator 4 and an editing controller 5) from a progressive scanning TV synchronizing signal source 30. In this way, an entire video production system of the progressive scanning TV format is synchronized with the interlaced scanning TV synchronizing signal, and is capable of being synchronized with 30 Hz.

Abstract: A secondary power source, which comprises a positive electrode containing activated carbon, a negative electrode containing Li4Ti5O12, and an organic electrolyte containing a lithium salt.

Abstract: A secondary power source, which comprises a positive electrode containing activated carbon, a negative electrode containing a carbon material capable of doping and undoping lithium ions, and an organic electrolyte containing a lithium salt, wherein the negative electrode has a density of from 0.6 to 1.2 g/cm3.

Abstract: A photochromic glass excellent in coloration/color fading characteristics, which comprises a glass substrate and a photochromic film formed on the glass substrate, wherein the photochromic film comprises at least one metal selected from the group consisting of platinum, palladium, iridium, rhodium and gold, copper, silver halide crystallites and silicon oxide, and a process for its production.

Abstract: An electric double layer capacitor comprising an electrode containing a carbonaceous material having a specific surface area of at least 500 m2/g, and an organic electrolytic solution capable of forming an electric double layer at the interface with the electrode, wherein the electrode is bonded to a current collector via a carbon type conductive adhesive layer containing a conductive carbon material and a polyimide resin.

Abstract: A secondary power source, which comprises a positive electrode containing activated carbon, a negative electrode containing a carbon material capable of doping and undoping lithium ions, and an organic electrolyte containing a lithium salt, wherein the ratio of the positive electrode capacity (C+) to the negative electrode capacity (C−), i.e. C+/C−, is from 0.1 to 1.2.

Abstract: An input-side rectifier rectifies a commercial AC voltage from a commercial AC power supply connected to an input terminal and develops a rectified voltage between two output terminals. The rectified voltage is smoothed by a pair of capacitors. A switching arrangement connects the capacitors selectively in series and in parallel between the two output terminals. An inverter is associated with each of the capacitors. A high-frequency voltage from each of the inverters is voltage-transformed by a transformer. The high-frequency voltage from the transformer is converted into a DC voltage by a high-frequency-to DC converter for application to a load. When an AC voltage in a lower voltage group is applied to the input terminal, a switching control unit causes the switching arrangement to connect the capacitors in parallel, and when an AC voltage in a higher voltage group is applied to the input terminal, the switching arrangement is caused to connect the capacitors in series.

Abstract: A power supply apparatus for use with an arc utilizing device includes capacitors coupled in series between outputs of a rectifying unit, and inverters each of which is coupled across a respective one of the capacitors. Each inverter converts a DC voltage from the capacitor into a high frequency voltage and applies it to a respective one of transformers. A converter converts an output voltage from each transformer into a DC voltage for application to a load. An output detector generates a signal representative of an output current supplied to the load. A first voltage detector generates a signal representative of a first voltage to be applied to the inverters. A second voltage detector generates a signal representative of a second voltage across one of the capacitors.

Abstract: An electric double layer capacitor having an electrolyte solution impregnated to an element including a positive electrode and a negative electrode facing each other with a separator interposed therebetween, wherein an electrode containing a carbon material having a specific surface area of at least 500 m.sup.2 /g is used as the positive electrode and/or the negative electrode, and the separator is made of a glass fiber sheet containing from 2 to 60 wt % of glass fibers having fiber diameters of at most 1 .mu.m.

Abstract: An electric double layer capacitor including an electrode containing a carbonaceous material having a specific surface area of at least 500 m.sup.2 /g, and an organic electrolytic solution capable of forming an electric double layer at the interface with the electrode, wherein the electrode is bonded to a current collector via a carbon type conductive adhesive layer containing a conductive carbon material and a polyimide resin.