摘要:
When a front fog lamp and a rear fog lamp are turned on by swinging an operating knob 4, a holder 18 climbs up to the crest portion 13b of a cam 13 and brings the tip of an engaging piece 22 into contact with the edge face of a coupling member 41. When an operating knob 5 is swung from an OFF position to an AUTO position in this state, the engaging piece 22 is urged by a coil spring 21 to resiliently stick into an arcuate engaging hole 45. When the operating knob 5 is swung back to the OFF position, an operating knob 4 is swung back by the engaging piece 22 in an interlocking mode. Then the holder 18 climbs down from the crest 13b of the cam 13 and causes the rear fog lamp to be turned off and only the front fog lamp is held ON.
摘要:
An alkali soluble resin and a resin composition thereof useful as a solder resist, having good adhesive properties, solder heat resistance, and plating resistance are provided. Particular resistance to plating under alkaline conditions is provided by the invention.
摘要:
A process for purifying crude acetonitrile comprising: (1) a step of contacting crude acetonitrile with nascent oxygen, (2) a step of contacting the acetonitrile from step (1) with a solid base, and (3) a step of removing low-boiling compounds and high-boiling compounds from the acetonitrile from step (2), wherein the step (3) may be effected after the step (1) and before the step (2).
摘要:
A switching power supply which detects a power failure within a short period and maintains the DC output voltage (V.sub.O) for a long time. The switching power supply comprises a first voltage control means which controls a switching means (2) by means of a pulse width modulation means (9) which responds to a first voltage comparator means (8) which compares the DC output voltage (V.sub.O) and a reference voltage (V.sub.R); a second voltage control means having a pulse width modulation means working voltage range expansion means (12) which responds to a second voltage comparator means (11) which compares the DC output voltage (V.sub.O) and a second reference voltage (V.sub.RR); wherein further provision is made of a second switching means (16) for connecting a precharged second capacitor (15) in parallel to the first capacitor (1), in response to the second signal successively outputted by the second voltage comparator means (11) in a short period.
摘要:
A switching regulator for controlling an output voltage by a pulse width of a switching element such as a transistor and the like at a primary side of the switching regulator. The switching regulator is provided with a feedback element which converts an output voltage at a secondary side into a feedback current, and controls an amount of charge of a capacitor (C3) to control a time for which the transistor (Q1) is kept on at the primary side and an amount of charge of a speed-up capacitor (C2) at the primary side. When a small load is imposed, an excessive increase in the output voltage can be prevented by controlling an amount of charge on the capacitor (3) to control the keeping-on-time and an amount of charge of the speed-up capacitor (C2) at the primary side. This also shortens the time for which the transistor (Q1) at the primary side is kept on.
摘要:
A disk drive housing structure has a rotating disk for recording information and a transducer adapted to write and read information on and from the disk. The structure further includes a positioning system having at least an arm to which the transducer is fixed and which is adapted to selectively position the transducer along the radial direction of the disk transducer by turning the arm. The structure also includes a member on which the disk, transducer and positioning system are mounted, wherein the mounting member includes a first housing which supports thereon both ends of a rotary shaft of the recording medium and both ends of a rotary shaft of the positioning system, and which has a first aperture part. The first housing further includes a second aperture part through which the disk and the rotary shaft supporting the disk are inserted and to which a supporting member for the rotary shaft of the recording medium is fixed.
摘要:
A ringing converter of the type having an output voltage stabilizing circuit connected on the primary side of a transformer. The converter is further provided with a circuit for detecting the primary current, which is proportional to the load current on the secondary side of the transformer. This enables detection of a change in the output voltage due to fluctuation in the load current on the secondary side, as detected by the detecting circuit. A signal indicative of the detected change is fed back to an oscillator circuit in order to stabilize the output voltage.
摘要:
A stabilizing power supply apparatus including, as a switching element, a magnetic amplifier supplied with a rectangular wave voltage produced by an inverter and controlled by a reset current. An error sensing circuit senses a difference between the output voltage of the magnetic amplifier and a reference voltage to produce an error signal corresponding to the sensed difference. An amplifier circuit amplifies the error signal into the reset current for the magnetic amplifier. The amplifier circuit includes a NPN-type transistor for amplifying the control current into the reset current and first and second diodes. The first diode has an anode terminal connected to a negative power supply line and a cathode terminal connected to the collector of the transistor in order that charge will not accumulate on the transistor base. The second diode has an anode terminal connected to the emitter of the transistor and a cathode terminal connected to the magnetic amplifier. The reset current is applied to the magnetic amplifier through the second diode to hold the output voltage of the apparatus constant by regulating the on/off timing of the magnetic amplifier in accordance with the difference between the magnitude of the output voltage and the magnitude of the reference voltage.
摘要:
In a power source device for a bubble memory unit consisting of a bubble memory part and a control part, a controlling supply voltage to be applied to both the bubble memory part and the control part is produced by a power source circuit based on a pulse width modulation system. The power source circuit is provided with a circuit which can expand the signal pulse width in excess of its upper-limit value during the ordinary voltage control. When the controlling supply voltage has become lower than a predetermined value, the pulse width is expanded so that the refresh operation may be perfectly executed when the power source device for the bubble memory unit is turned off.
摘要:
An image forming apparatus includes a feeder having a longer side direction orthogonal to a conveyance direction of a recording medium, and feeds a maximum size recording medium with a longer side first, an image forming unit having a maximum sheet feed width corresponding to a longer side length of the maximum size recording medium, and prints a toner image onto the recording medium, and a sub feeder that can feed the maximum size recording medium to the image forming unit independently from the feeder. A post processing apparatus receives a printed recording medium and executes post processing on a side of the recording medium. A feeding source of the maximum size recording medium is selected from the feeder and the sub feeder for executing the post processing on the longer and shorter sides of the maximum size recording medium, respectively.