Abstract: A linear scale measuring device capable of minimizing an error in measuring which occurs due to vibration and/or shock, carrying out the mounting on a machine tool or the like at a sufficient degree of freedom and being efficiently assembled. The device includes a slider having an index scale arranged opposite to a main scale and adapted to be moved in relation to the main scale and a stationary link to which the slider is securely connected. The slider is connected to the stationary link at two positions defined along a movement direction of the slider by an elastic connection means comprising a coil spring and a wire spring which act to force the slider toward the main scale.

Abstract: A high-voltage resistance wire for use in an engine ignition device has a resistive conductor, an insulating layer covering the resistive conductor, and a protctive sheath layer surrounding the insulating layer. The protective sheath layer is loosely fitted to the insulating layer so as to provide a gap of 0.1 mm or greater therebetween. The gap results in a small electrostatic capacitance between the innermost resistive conductor and the outermost protective which improves the ignitability of the resistance wire. Additionally, the protective sheath layer is formed by impregnating or coating silicone resin or fluororesin into or onto a tubular fiber braided body of glass or polyaramide fiber. The protective sheath has an improved flexibility and tearing strength from an end terminal.

Abstract: In a magnetic head of perpendicular magnetization type having main and sub magnetic poles arranged at both sides of a recording medium, a nonmagnetic supporter holding a high permeability magnetic thin layer of the main magnetic pole is formed by a polycrystalline sintered body substantially composed of titanium carbide and alumina. This polycrystalline sintered product well matches with a recording medium having a cobalt-chromium alloy layer so that the recording medium does not wear for a long time of use, and therefore, so that the contact surface of the main magnetic pole is hardly damaged. The same sintered body may also be used for the sub magnetic pole arranged to be in contact with the recording medium. Some structural improvements are also provided so that undesirable influence due to an adhesive layer adjacent to the magnetic thin layer is removed. One or more additional thin layers may be provided for reducing crosstalk between adjacent tracks.

Abstract: The antibiotics designated obelmycins exhibit high proliferation inhibiting action against leukemia cells and are effective as anti-cancer agents.

Abstract: In an endoscope apparatus, an inserting instrument is insertable through an inserting portion of an endoscope so as to have a distal end portion projected from a distal end of the inserting portion. The inserting instrument comprises an outer tubular envelope and an elongated rod-like member located at a distal end of the envelope. An operating device located at a proximal end of the envelope is connected to the rod-like member through a wire member extending through the envelope. The rod-like member is operated to be moved between an inoperative position where the longitudinal axis of the rod-like member extends substantially in coaxial relation to the envelope and an operative position where the longitudinal axis of the rod-like member extends across an extended line of the envelope. The inserting instrument may be utilized as guiding and/or measuring instrument.

Abstract: A plasma X-ray source comprises inner and outer cylindrical electrodes disposed coaxially and with a certain distance with respect to each other, an electrical insulator disposed between end portions of the inner and outer cylindrical electrodes, and a discharge vessel disposed to envelop the inner and outer cylindrical electrodes. A pulse voltage is applied between the inner and outer cylindrical electrodes to produce plasma in the discharge vessel. An electrically conductive spherical shield is disposed to envelop a space where the plasma is pinched, and the spherical shield is maintained at a potential equal to that applied to the outer cylindrical electrode.

Abstract: A low-pressure mercury vapor discharge lamp in which a rare gas and mercury are provided in an outer bulb, which in turn contains therein a plurality of bent inner tubes, each having an opening at an end and an electrode at the other end thereof. A starting probe is provided between the openings in the outer bulb. An operating circuit or starter is connected to the electrodes. Further, a starting probe circuit is connected to the starting probe to apply a high voltage to the starting probe at the time of ignition.

Abstract: An apparatus for delivering an article, in which the delivery passage per se must be moved, comprises a pair of delivery belts substantially parallel to each other and supporting members for supporting the delivery belts, a mechanism for turning the paired delivery belts with the ends of the supporting members acting as the centers of turning so that the paired delivery belts are separated from each other from the substantially parallel position.

Abstract: A discharge lamp operating device having a high frequency inverter is discharged. Connected to a secondary winding of an oscillation transformer of the high frequency inverter is a discharge current supply circuit having a switch for controlling supply of a discharge current to dim a fluorescent lamp. An electrode heating circuit is connected to secondary windings of the transformer to continuously heat electrodes. An oscillation frequency of the inverter is controlled such that it increases as a dimming factor is high and decreases as the dimming factor is low. A capacitor is connected in series with a path of an electrode heating current in the electrode heating circuit so that the heating current is increased when the dimming factor is high and decreased when it is low by utilizing a frequency dependency of an impedance of the capacitor.

Abstract: In a magnetic head for perpendicular magnetization recording of a main magnetic pole exited type, a high permeability magnetic thin layer is held at its top portion by nonmagnetic supporter and the thin layer is closed by a first high permeability block. The thus constructed main magnetic pole is surrounded by a second high permeability block, and a third high permeability block is located in facing relation to the main magnetic pole and second high permeability material. This magnetic head has high recording and reproducing efficiency and well-shielded from external magnetic field. Some structural improvements are also provided so that leakage of magnetic flux, disconnection and short circuit of a coil are avoided.

Abstract: A plasma X-ray source is operable, like the plasma focus type source, to generate impulse discharge through a gas filled in a discharge tube. A relatively small amount of the gas is continuously supplied to and evacuated from the discharge tube in accordance with an occurrence frequency of discharge, without operating evacuation and filling of the gas at each cycle of discharge, under the regulation to make constant the pressure within the discharge tube, thereby eliminating the time for exchange of gas contaminated by discharge, reducing the amount of gas used, and improving reproducibility of discharge.

Abstract: A low-pressure mercury vapor discharge lamp in which a rare gas and mercury are provided in an outer bulb, which in turn contains therein a plurality of bent inner tubes, each having an opening at an end and an electrode at the other end thereof. A starting probe is provided between the openings in the outer bulb. An operating circuit or starter is connected to the electrodes. Further, a starting probe circuit is connected to the starting probe to apply a high voltage to the starting probe at the time of ignition.

Abstract: A variable-threshold-type differential signal receiver comprises a differential amplifier for comparing differential voltages of differential input signals with a predetermined threshold voltage so as to provide logical output signals. It further comprises an emitter follower and an impedance means, the output of the emitter follower being superimposed through the impedance means on one of the differential input signals, whereby the predetermined threshold voltage is variably controlled by controlling the input voltage of the first emitter follower.

Abstract: A low-pressure mercury vapor discharge lamp comprising an envelope forming a gas-tight closed space and a pair of inner tubes provided in the closed space and having an end thereof sealed at the first end of the outer envelope, the other end thereof being opened into the closed space, and electrodes provided at the sealed end sides in the inner tubes. The temperature of the coldest spot of the envelope is in a range between 45.degree. C. and 65.degree. C. at an ambient temperature of 25.degree. C.

Abstract: In a fuel injection type internal combustion engine including a cylinder body with a cylinder chamber, a cylinder head, a piston adapted to be reciprocated within the cylinder chamber, an injection nozzle having its central axis inclined with respect to the top of the piston and its injection port offset from the center of the cylinder chamber, and a combustion chamber cavity opened in the top of the piston, an auxiliary cavity defined by a notched wall having complicatedly cut surfaces is formed in the opening portion of the combustion chamber cavity. The notched wall is formed in a manner to follow the conical surface of a cone, in response to the piston travel, the cone having as its apex a point located upstream of the injection port, as its center the central axis of the injection nozzle, and as its apex angle the maximum spray diverging angle of the injection nozzle.

Abstract: Disclosed is a discharge lamp lighting device which comprises a series closed-loop circuit including an AC power supply, a ballast having an inductance, and a discharge lamp, and a switch circuit in parallel to the discharge lamp. The switch circuit is turned on when the voltage across the discharge lamp is reduced to zero, and then turned off when the current flowing in the switch reaches a predetermined value. The switch circuit thus repeats its on-off operation every half cycle of the voltage across the discharge lamp. The electromagnetic energy is stored in the inductance of the ballast when the switch circuit is on, and the stored electromagnetic energy is superimposed on the source voltage and applied to the discharge lamp when the switch circuit is turned off, thus reigniting the discharge lamp every half cycle. This makes it possible to light directly a discharge lamp having a lamp voltage approximate to the source voltage.

Abstract: A discharge lamp lighting device comprises a serial connection of an inductive ballast and a discharge lamp connected across an A.C. power source, and a switching circuit connected substantially in parallel to the discharge lamp and operable to carry out two consecutive ON/OFF operations in the beginning of each half cycle of the A.C. power source while the discharge lamp is in its lit condition. The switching circuit preferably comprises a full-wave rectifier connected substantially in parallel to the discharge lamp, a switching element connected between the output terminals of the rectifier, and a control circuit for controlling the ON/OFF operation of the switching element.

Abstract: A starting circuit for discharge lamps includes a current limit device, a full wave rectifier circuit and a Cockcraft-Walton's circuit which are connected between a d.c. discharge lamp having a cathode and an anode and the input terminals of an a.c. power source. Moreover, the Cockcraft-Walton's circuit is constructed by sharing a rectifier with the full wave rectifier circuit and a preheating circuit is provided for the cathode and includes another rectifier of the full wave rectifier circuit and a switching device.

Abstract: A low pressure metal vapor discharge lamp has a double-tube type discharge vessel consisting of a fully closed outer glass bulb and an inner glass tube substantially coaxially disposed in the outer glass bulb, the inner glass tube being closed at its fixed end and opened at its free end. The space within the discharge vessel is filled with a small amount of a metal and a rare gas of a low pressure. A single cathode is disposed within the space inside the inner glass tube, while a plurality of anodes are disposed in the annular space between the inner glass tube and the outer glass bulb. According to the invention, a number of discharge channels corresponding to that of the anodes are formed between the single cathode and respective anodes, via the opening end brim of the inner glass tube. In operation, anode oscillations take place alternately in respective anodes to cause a self-excitation switching operation, so that a plurality of plasmas are formed.

Abstract: An optical apparatus wherein a mirror is mounted on a stage. On such stage a supporting portion is provided and the mirror is fixed such to supporting portion at a single portion of the mirror. At the free end portions of the mirror, which are not fixed to the stage, the end surface is in contact with a buffering member.