Abstract: The invention provides a gas insulated switchgear, and a method for detecting arc damage in a part used in a gas insulated switchgear, which detect directly when an electric contact or a peripheral part reaches an initially set wear limit. An insulating nozzle of a circuit breaker contains a marking substance that releases a gaseous substance inside a circuit breaker gas container as a result of wear by an arc. For ensuring heat resistance and insulation properties, the insulating nozzle is ordinarily formed of a fluororesin, but in the present invention, it is formed of the ordinarily used fluororesin having uniformly mixed therein, as the marking substance, a chlorine-containing resin which has excellent heat resistance and insulation properties such as polyvinylidene chloride.

Abstract: The invention provides a gas insulated switchgear, and a method for detecting arc damage in a part used in a gas insulated switchgear, which detect directly when an electric contact or a peripheral part reaches an initially set wear limit. An insulating nozzle of a circuit breaker contains a marking substance that releases a gaseous substance inside a circuit breaker gas container as a result of wear by an arc. For ensuring heat resistance and insulation properties, the insulating nozzle is ordinarily formed of a fluororesin, but in the present invention, it is formed of the ordinarily used fluororesin having uniformly mixed therein, as the marking substance, a chlorine-containing resin which has excellent heat resistance and insulation properties such as polyvinylidene chloride.

Abstract: The invention provides a gas insulated switchgear, and a method for detecting arc damage in a part used in a gas insulated switchgear, which detect directly when an electric contact or a peripheral part reaches an initially set wear limit. An insulating nozzle of a circuit breaker contains a marking substance that releases a gaseous substance inside a circuit breaker gas container as a result of wear by an arc. For ensuring heat resistance and insulation properties, the insulating nozzle is ordinarily formed of a fluororesin, but in the present invention, it is formed of the ordinarily used fluororesin having uniformly mixed therein, as the marking substance, a chlorine-containing resin which has excellent heat resistance and insulation properties such as polyvinylidene chloride.

Abstract: The invention provides a gas insulated switchgear, and a method for detecting arc damage in a part used in a gas insulated switchgear, which detect directly when an electric contact or a peripheral part reaches an initially set wear limit. An insulating nozzle of a circuit breaker contains a marking substance that releases a gaseous substance inside a circuit breaker gas container as a result of wear by an arc. For ensuring heat resistance and insulation properties, the insulating nozzle is ordinarily formed of a fluororesin, but in the present invention, it is formed of the ordinarily used fluororesin having uniformly mixed therein, as the marking substance, a chlorine-containing resin which has excellent heat resistance and insulation properties such as polyvinylidene chloride.

Abstract: A pair of electric contacts include a pair of first units which are provided on the surfaces of the end sides of the electric contacts, and generate light having first characteristics at the time of opening and closing of the electric contacts, and a pair of second units which are covered with the first units, and generate light having second characteristics differing from the first characteristics when abrasion of the first units reaches abrasion detection positions due to opening and closing of the electric contacts.

Abstract: A pair of electric contacts include a pair of first units which are provided on the surfaces of the end sides of the electric contacts, and generate light having first characteristics at the time of opening and closing of the electric contacts, and a pair of second units which are covered with the first units, and generate light having second characteristics differing from the first characteristics when abrasion of the first units reaches abrasion detection positions due to opening and closing of the electric contacts.

Abstract: A remaining life of a stator coil resulting from galvanic corrosion between different kinds of metals in a rotating machine adopting a water cooling system and remaining life of a stator coil's insulating layer resulting from a wet heat degeneration can be positively and integrally evaluated according to the present invention by sampling a brazing section between the stator coil clip and copper wires, cutting off the sampled brazing section in a copper wire array direction, measuring a joined section brazed with a brazing material as a copper wire direction length and finding an effective sealing length of that brazing section or sampling an insulating layer of the stator coil, finding infrared spectra of the insulating layer, comparing the infrared spectra of the insulating layer of the stator coil with infrared spectra of a healthy stator coil's insulating layer not penetrated by water, finding difference spectra of an ester group of an epoxy resin used as a bonding agent of the insulating layer and predict

Abstract: A paper folding apparatus for folding a copied sheet of paper discharged from a copying machine. The apparatus includes a feed roller pair for feeding a sheet of paper, a first folding roller pair, a second folding roller pair. This second folding roller pair is disposed in opposition to the first folding roller pair, for folding the sheet of paper fed from the feed roller pair in cooperation with the first folding roller pair. A swingable paper guide unit is disposed above the first and second folding roller pairs, for guiding the sheet of paper fed from the feed roller pair selectively to the first folding roller pair or the second folding roller pair. A paper guide plate is disposed between the first and second folding roller pairs, for leading a leading edge of the sheet of paper guided by the paper guide unit to a nip portion of the first folding roller pair or the second folding roller pair.

Abstract: A supporting platform with a tough structure has a height which can be optionally adjusted. In the present invention, since the intermediate section which links the base section to be placed on the floor with a platform on which a person or object is placed comprises expandable and contractable links, a gear mechanism for regulating the movements of these links and a gear stop mechanism for regulating the gear, it is possible to provide a supporting platform of extremely high durability.

Abstract: A process is disclosed for treating waste water which comprises the steps of adding thermal decomposition product consisting of CaO-MgO-SiO.sub.2 system compound singly or in combination with at least a metal salt selected from the group consisting of iron salts and magnesium salts to waste water containing an emulsion or a latex, thereby causing coagulation and sedimentation of particles consisting mainly of resin existing in the waste water and then removing the coagulated particles.

Abstract: In a copying machine having an optical system for directing an image from a microfilm onto a photosensitive drum either of two fixed focus projecting lenses may be moved into alignment with the microfilm. Each projecting lens is provided with an adjustable drive system for moving the projecting lens along the optical axis thereof to vary the magnification. A plurality of mirrors are provided for reflecting the image received from said projecting lens onto the photosensitive drum. Two of the mirrors are supported at right angles to each other on a support member for reflecting an incident beam of light on one of the mirrors in a direction opposite and parallel to the incident light beam. A drive system is provided for moving the support member parallel to the incident light beam for varying the length of the optical path.

Abstract: A copying machine has an optical mechanism which varies a back focal length of a lens. A control circuit generates a control signal so that the optical mechanism changes the back focusing length of the lens so the lens is first focused on an upper surface of a microfilm and then on a lower surface of the microfilm. An optical sensor generates separate light quantity signals for each focusing position of the lens and these signals are held and compared in a circuit which then determines which surface of the microfilm bears a picture. The optical mechanism then appropriately adjusts the back focal length of lens.

Abstract: A hair cutting unit device for the human head includes a movable open-ended casing in which an electrically operated clipper is mounted on guide means for movement. The blades of the clipper are in the open end of the casing. The position of the clipper with respect to the casing will fluctuate so that the cutting blades are moved away from the open end as the unit is moved upwardly on a head from the lower hairline so as to gradually increase the length of hair being left on the head. Rotary drums and threads in the casing are connected to a fixed member in which the head is positioned to effect translation of the clipper relative to the casing in response to movement of the unit upwardly from the lower hairline.

Abstract: An apparatus used for forming lips by outwardly bending the end of a metal plate which may be joined with the bent end of another plate so as to form a duct used for an air-conditioning ventilation system. The end to be bent is reinforced with a continuous guide member connected thereto, said guide member being generally L-shaped in cross-section, leaving a given width to form a lip. The bending apparatus is comprised of a roller for engaging and rotating along the guide plate which serves as a supporting member and a guide rail. The apparatus is further comprised of a pressing disc for contacting under pressure the end to be bent. The disc acts in cooperation with the engaging roller at a position opposite thereto. Accordingly, the end is bent as the disc and roller are rotated. The bending apparatus is designed to move along said reinforced guide, bending the end of a metal plate so as to continuously form a lip which is L-shaped in cross-section.

Abstract: A suction type hair cutting device which is comprised of a casing, a suction passage housed by said casing and connected to a vacuum source, and an inlet at the end of said suction passage provided with a fixed blade and an arcuate oscillatory blade. The arcuate oscillatory blade is directly driven by a crank at the output shaft of a motor mounted on the casing, or is driven by a gear mechanism which is rotatable through a flexible wire or the like, whereby the arcuate oscillatory blade is slidably oscillated relative to the fixed blade. The suction inlet is provided with means for controlling or turning air flow rearwards of said both blades which are adjacently elastically arranged to each other, so as to cut hair positively. The cutting hair length may be easily adjusted with the provision of a suction tube which can be connected to said suction inlet, the suction tube being adjustable in its axial length.

Abstract: A device for detecting an abnormal temperature in a fixer, including a pulse generation controller capable of detecting the temperature in the fixer, comparing it with a predetermined reference temperature, and generating pulses continuously while the fixer temperature is lower than the reference temperature or generating no pulse at any other time; a pulse interrupter for interrupting the pulse output from the pulse generation controller until the temperature in the fixer reaches a desired fixing temperature for the first time after the start of power supply to the fixer, and an abnormality detector for detecting an abnormal fixing temperature when the integral of the pulses having passed through the pulse interrupter within a given time has reached a predetermined value.

Abstract: A chain delivery sheet feeding device, including a sheet size selector switch for selecting a desired sheet size among paper sheets of different sizes which are separately carried on a plural number of paper trays located within the apparatus. A plurality of grippers are provided on chain members for gripping the paper sheets. A sheet releasing device is also provided for separating the paper sheets from the grippers. The sheet releasing device comprises a switching member having a movable gripper-releasing cam member which is adapted to operate under the control of a solenoid device which determines the sheet releasing point for the grippers. A size selector switch and the sheet releasing point determining solenoid device are opreated in relation to each other by means of a delay circuit in such a manner that a current sheet releasing point is retained until the last one of a number of copy sheets for a preceeding original size is released.