Abstract: A board saw exhibits a frame on which a guide beam is horizontally slidable. A sawing unit is mounted with vertical mobility on the guide beam and is connected by a cable to a compensating weight. In order to absorb the reaction forces generated by the saw reliably in the immediate sawing region, a horizontal support beam is mounted for vertical displacement and likewise connected by a cable to a compensating weight. The installation is preferably wired so that the support beam follows automatically to the level of the saw blade when the sawing unit is pivoted into the horizontal cutting position.For an accident-proof support of the board (P), a row of support arms is provided on the upper girder of the frame and also on the movable support beam, and these support arms are arranged staggered so that when the support beam is raised they interlace comb fashion and ensure a correct accident-proof support of the board.

Abstract: A ribbon feed mechanism for a bi-directional printer that produces a constant relative ribbon to print-head velocity. The invention produces the constant relative velocity by coupling the ribbon to the print-head through a reciprocating shuttle, which moves in an opposite direction to and at one-half the speed of the print-head. As the shuttle reciprocates it engages the ribbon such that a constant length is maintained between the ribbon supply and the print-head and between the print-head and the ribbon take-up. The ribbon is taken up at a constant speed. By this method, the relative ribbon to print-head speed is fixed at the ribbon take-up speed.

Abstract: An electromagnet control apparatus having a remote control switch assembly switchable between a number of positions representing full, variable, residual and zero levels of magnetization. Means are provided for causing the electromagnet to be fully energized for several seconds before being dropped to the residual level of magnetization whenever the switch assembly is switched to a residual setting.

Abstract: Organic polymeric plastic substrates of optical elements are made anti-static and abrasion-resistant by: applying a conductive layer to at least one surface of the plastic substrate; and overcoating the conductive layer with an abrasion-resistant layer.

Abstract: A centrifugal type friction clutch for motor vehicles, which include: a disk serving as an output member and provided with a number of frictional coupling element support means in outer peripheral portions thereof; a drum serving as an input member and provided with a frictional coupling surface on the inner periphery thereof in coaxial relation with the circumference of the disk; and frictional coupling elements respectively supported by the frictional coupling element support means and displaceable radially outward according to the rotational speed of the disk for engagement with frictional coupling surface on the drum.

Abstract: In the high speed impact printer disclosed herein, the effects of magnetic interaction between adjacent magnetic actuators is offset or compensated for by providing a programmable delay in the energization of each magnet, the value of the delay being programmed as a predetermined function of the pattern of energization of physically adjacent coils.

Abstract: An eddy current defect-detecting system for a metal tube comprises a detector including test coils movable axially through the metal tube for detecting as an impedance variation a variation in an eddy current produced due to a defect present in the metal tube, an oscillator for exciting the detector at a high frequency, a phase adjuster responsive to an oscillated output from the oscillator for adjusting the phase of the oscillated output to produce a first control signal, a phase shifter responsive to the first control signal from the phase adjuster for issuing a second control signal which is 90.degree.

Abstract: An improved vaporized liquid fuel combustion apparatus of the type including a cylindrical combustion chamber, a blower and a heat exchanger is disclosed. An end plate located at the upstream end of the combustion chamber is formed with an air flow guide port through which combustion air is introduced into the combustion chamber. The air flow guide port is located at a position eccentric relative to the axis of the cylindrical combustion chamber. An air guide is disposed in the area located in the proximity of the air flow guide port in such a manner to generate swirl flow in the combustion chamber. The air guide may be disposed on the wall surface of the end plate either on the side located opposite to the blower casing or on the side located opposite to the combustion chamber. The air guide is preferably formed integral with the end plate by press working.

Abstract: In the hydraulic system disclosed herein, a flow matching device is employed to implement a system in which filling, emptying and holding of a variable volume load, such as a hydraulic piston, may be accomplished at controlled flow rate by a hydraulic circuit including a flow matching control valve.

Abstract: Disclosed is a process and device for determining which cells of a suspension containing cells of the same species and genus are secreting cellular substances. Such determinations are made by exposing the cells to rotating electrical field forces of variable rotational speed and differentiating the cells secreting the cellular substances from the other cells by means of their rotational behavior which differs from that of the other cells.

Abstract: The present invention is an energy efficient process for converting solid waste and/or sewage sludge into a chemical intermediate substrate for production of energy and/or separate non-energy related by-products. The process of this invention integrates technologies for: slurry production and material recovery; slurry demineralization and heavy metal recovery; formation and storage of chemical intermediate substrate; its dewatering; its processing into various energy sources such as solid carbon fuel, steam, or methane gas; and/or production of non-energy by-products such as cement board, gypsum fiber board, or agricultural products.

Abstract: An improved vaporized liquid fuel combustion apparatus of the type including a cylindrical combustion chamber, a blower, and end plate located between the combustion chamber and the blower and a heat exchanger for heating air by utilizing thermal energy generated in the combustion chamber is disclosed. The combustion chamber, the blower, the end plate and the heat exchanger are separable components and the blower and the heat exchanger are firmly assembled together by tightening bolts at a single flange connection with the end of the combustion chamber making gastight contact with the peripheral end part of the end plate. The one end part of the combustion chamber, the peripheral end part of the end plate are formed and the one end part of the heat exchanger are formed to mate together.

Abstract: A bearing lubrication system for an extension housing of automatic transmission, including an extension housing connected to a transmission case, a valve casing of a hydraulic control system fastened to the transmission case, a transmission output shaft supported in the extension housing, and a sleeve yoke splined to the output shaft and fitted in a bearing portion of the extension housing through a bearing, characterized in that the lubrication system is provided with a forced lubrication means comprising: a bearing lubricant tapping passage branched off from a lubricant oil passage or line pressure conduit in the transmission case or in the valve casing; a bearing lubricant supply passage communicating the bearing lubricant tapping passage with the bearing portion of the extension housing; and a flow control throttle provided in the bearing lubricant tapping passage or in the bearing lubricant supply passage.

Abstract: To adjust a device for the projection copying of masks on a semiconductor substrate, adjustment marks are illuminated with wideband adjustment light in order to make variations in the intensity of the reflected signal in the area of a mark field. The color defect created by the wideband nature of the adjustment light is eliminated by an achromatization device which covers only a part of the total picture field which contains the adjustment marks.

Abstract: The invention relates to a fingerboard for stringed instruments, especially guitars, comprising transversely extending frets for varying the pitch of taut strings extending lengthwise over the fingerboard. In order to improve tuning of the instrument, the frets are divided into fret elements in the region of the individual strings extending thereover. The fret elements are individually adjustable on the fingerboard in the longitudinal direction of the strings.

Abstract: To adjust a device for the projection copying of masks on a semiconductor substrate, adjustment marks are illuminated with wideband adjustment light in order to eliminate variations in the intensity of the reflected signal in the area of a mark field. The color defect created by the wideband nature of the ajustment light is determined by spectroscopic means and taken into account when making the adjustment.

Abstract: A method and an apparatus for bonding a thin electrically conductive wire, especially an aluminum wire (11), to electrical bonding pads or areas (12, 14) of electric or electronic components (16), especially microchips or semiconductor components. To this end the wire (11) is briefly pressed against the bonding pad (12, 14) by means of an ultrasonically energized bonding wedge (10) and is subsequently severed at a small distance from the side (17) of the wedge (10) that is opposite to the wire feeding side (15) thereof. To prevent the formation of a wire tail (TL) protruding beyond the bonding length (BL), a wire clamping tool (21) is provided on the wire feeding side of the wedge (10) by means of which the wire (11), after having been severed and prior to another bonding operation, is moved back, preferably retracted, at least to such an extent that the free wire end is approximately flush with the side (17) of the wedge (10) which is opposite to the wire feeding side (15 ) thereof.

Abstract: A process for reducing ash content of coal with an initial concentration of inherent ash of approximately 0.25 w/o to approximately 3 w/o. The coal is swollen and wetted with an alcohol solution such as methanol, then deashed with a mineral acid solution such as hydrochloric and hydrofluoric acid. The demineralized coal is neutralized, washed, and dried for use in making coal slurries with a very low ash content.