Abstract: In a transfer feeder in which transfer bars are driven in a feeding direction by swinging a feed lever (4) through a cam-follower (5) by a feed cam (2) mounted to a camshaft (1) rotated by power taken out of a transfer press, a control circuit controls air pressure of a rear cushion cylinder (6) pushing the feed lever to the feed cam to an optimum value in response to a production speed of the press.

Abstract: A hydraulic pilot valve consisting of a pair of pressure-reducing valves, wherein a stopper which can freely adjust maximum control inputs of operating levers (23, 24) of the hydraulic pilot valve is provided to make maximum pilot pressures output from the pair of pressure-reducing valves freely adjustable. Furthermore, in the hydraulic pilot valve, a stopper member for limiting a maximum control input of an operating lever is fixed to the operating levers (23, 24), so that an operating force during a maximum operation of an operating lever is received by the stopper member. Furthermore, in the hydraulic pilot valve, an erroneous operation due to vibrations and the like is prevented by a damper mechanism (50) interposed between a lever fixed to each of the operating levers (23, 24) and a main body (1) of the valve.

Abstract: A laser device is capable reducing fluctuation of the beam width of the output laser beam due to abrasion of its discharge electrodes. A part of the contour shape of a section perpendicular to the longitudinal axis of the chamber of the laser device in at least one of the electrodes, which part confronts the other one of the electrodes, has a shape of a circular arc having a predetermined radius. The width of at least one of the two electrode may be substantially equal to the width of electric discharge taken place between the electrodes. Further, a conductor member may be disposed on each side of the electrode along its longitudinal axis to reduce electric field strength therearound.

Abstract: A twin-scrape dozer, capable of maintaining a satisfactory balance during earth loading, of loading a larger quantity of earth, of efficiently conveying earth even over a soft ground, and of adjusting the rate at which earth is scattered, has a crawler type tractor (1, 1A) equipped with a traveling mechanism, a front earth loading and ejecting device (10, 50), and a rear earth loading and ejecting device (30, 70). The traveling mechanism has track frames (2, 2A) at right and left sides of the vehicle (1, 1A), track shoes (5, 5A) and drive units (6, 6A). The earth loading and ejecting devices are provided at the front and rear parts of the vehicle (1, 1A), and are installed to be vertically movable with lift cylinders (13, 33, 56, 78). Each of the earth loading and ejecting devices is provided with a scraper (21, 34, 53, 75) and a bowl member (14, 41, 61, 81) pivotably connected together by pivot pins (22, 42, 62, 83).

Abstract: A blade control system for use in a bulldozer comprising: a driving mode setting device which can set an automatic blade control mode during dozing operation; a running condition detector for detecting whether a transmission is placed in forward range or reverse range; and a blade controller for controlling tilting and lowering of a blade such that when the speed range detector has detected that the transmission is placed in forward range and the driving mode setting device has set the automatic blade control mode to start digging, the lower end of the blade becomes horizontal in relation to a vehicle body and is brought into contact with the ground.

Abstract: A data collection system for a driving machine for collecting data obtained at a plurality of controllers disposed within the driving machine, in which one of the plurality of controllers is used as a master controller to perform sequential polling operation over the other controllers including an external controller through a communication line. The other controller subjected to the polling transmits data obtained at its own controller to the controllers other than its own controller. The master controller continues its polling operation so long as the master controller fails to receive a response to the polling from the external controller. The master controller, when receiving the response to the polling from the external controller, judges that the external controller was connected to a connector for connection with the external controller and stops its polling operation.

Abstract: Processing accuracy varying with thermal displacement of a machine body is automatically, rapidly adjusted. There is provided a temperature detector for detecting temperature in the vicinity of a bearing for an inner-tooth milling cutter. Based on the temperature detected by the temperature detector, temperature-related correction data to be used for correction of basic processing data is computed. In this case, the correction data related to the diameter of the circular path followed by the center of the inner-tooth milling cutter is obtained by calculating a magnification with respect to the basic processing data, while the correction data related to the center of the circular path is obtained by calculating a deviation from the basic processing data.

Abstract: A remote control apparatus of a construction machine in which steering control is performed by hydraulically controlling the steering clutches and the steering brakes, comprises remote operating unit for generating a first steering command for turning on or off the steering clutches of the construction machine and a second steering command for turning on or off the steering brakes of the construction machine, steering operation of the construction machine being controlled by the first and second steering commands; and a control unit provided in the construction machine, for performing a control in such a manner that when the first steering command becomes on, the steering clutches are released for a duration during which the first steering command is on, and when the second steering command becomes on in the duration during which the first steering command is on, hydraulic pressure of the steering brakes is gradually changed from a releasing side to a braking side with a predetermined gradient.

Abstract: Preliminary cutter units of a shield machine provided with preliminary cutters capable of continuously excavating soil in a working place even if main cutters are worn away.

Abstract: A thin sulfide film can be formed by simultaneously generating under different conditions a plurality of deposition materials to be deposited on a substrate, using the fact that sulfur has a higher vapor pressure. Sulfur vapors can be generated in an external vessel (6) which is located outside the vacuum deposition vessel (1). The sulfur vapors can then be introduced into the vacuum deposition vessel (1) through a vapor inlet tube (7) to form a localized atmosphere of sulfur vapors within the vacuum deposition vessel (1) in the vicinity of the substrate which is positioned on a substrate holder (4). Chemical bonding, on the substrate, of the sulfur vapors and the vapors of other deposition materials generated from other deposition sources provided in the vacuum deposition vessel (1) form a thin film of high quality with good reproducibility.

Abstract: An engine stall prevention control method according to the present invention is a method for eliminating troublesome inching pedal operation, automatically preventing engine stall and relieving an operator from physical exhaustion.

Abstract: A device for improving the workability and drivability of a tracked vehicle whose blade height is automatically controlled, in which when changeover of a speed step from reverse to forward is detected by a transmission lever position detector (3), a controller (15) controls to raise or lower the blade (8) to a target value which is the height of the blade (8) initially set by an initial height setter (4). With a blade raising lever (1) operated, the blade (8) is controlled to rise or lower in proportion to the height of the blade during manual operation. The height is detected by a blade-height detector (14) and the blade is controlled to rise or lower to a target value which is the detected value of height.

Abstract: An operating valve assembly incorporates a pressure compensation valve and is capable of contributing down-sizing of a hydraulic circuit. The valve assembly includes an operating valve, compensation valves and a load pressure detecting portion. A valve body of the operating valve defines a spool bore extending laterally through the valve body at a vertically intermediate portion of the valve body, a load pressure detecting port at a laterally intermediate portion of the spool bore, and a respective pump port, actuator port and tank port at each side of the load pressure detecting port. The operating valve also includes a spool within the spool bore. The pressure compensation valves are arranged at left and right sides of an upper portion of the valve body and the load pressure detecting portion for supplying load pressure to the load pressure detecting port is formed in the spool.

Abstract: A dozing control unit for a bulldozer, comprising an actual tractive force detector for detecting the actual tractive force of a vehicle body; a driving mode selector button capable of switching a manual operation mode to an automatic driving mode in dozing operation; and a blade controller for controlling a blade to be lifted or lowered such that if there is a difference between the actual tractive force detected by the actual tractive force detector and a target tractive force set for the automatic driving mode when the manual operation mode is switched to the automatic driving mode by the driving mode selector button, the actual tractive force gradually comes closer to the target tractive force.

Abstract: A steering system for use in a track-laying vehicle comprising: a steering motor that is forwardly and reversely rotatable and designed to drive crawler belts provided at both sides of the vehicle such that a relative travel difference is caused between the crawler belts, thereby turning the vehicle rightwards or leftwards; a forward/reverse drive state detector for detecting whether the vehicle is in its forward drive state or reverse drive state; a lateral turn instructing device for instructing right turn or left turn of the vehicle; and a steering motor forward/reverse rotation control unit for determining the forward or reverse rotation of the steering motor in accordance with the forward or reverse drive state of the vehicle detected by the forward/reverse drive state detector, such that the vehicle turns to the right or left in response to a right turn instruction or left turn instruction released from the lateral turn instructing device.

Abstract: An image processing apparatus capable of displaying an object on right and left screens so that the object an be visually examined as usually seen by the naked eye. When visual examination positions of right and left displays (1, 2) are detected by eye cameras (3, 4), the visually examined object (WK) on the screens (1, 2) is specified on the basis of the detected visual examination positions. A position of the object (WK) on one screen (1a) is fixed and an entire image including the object (WK) is shifted on the other screen (2a) so that a position of the object (WK) on the other screen (2a) becomes the same to the fixed position on the one screen (1a). A processing is performed to darken a portion of the screen (2a) which is not displayed on the screen (2a) before the image shifting and is displayed on the screen (2a) as a result of the image shifting, and also to darken a portion of the screen (1a) corresponding to the darkened part of the screen (2a) so that the corresponding part is also darkened.

Abstract: A laser device is capable reducing fluctuation of the beam width of the output laser beam due to abrasion of its discharge electrodes. A part of the contour shape of a section perpendicular to the longitudinal axis of the chamber of the laser device in at least one of the electrodes, which part confronts the other one of the electrodes, has a shape of a circular arc having a predetermined radius. The width of at least one of the two electrode may be substantially equal to the width of electric discharge taken place between the electrodes. Further, a conductor member may be disposed on each side of the electrode along its longitudinal axis to reduce electric field strength therearound.

Abstract: A pressurized fluid supply system, in which a plurality of pressure compensation valves are connected to a pump discharge line of a hydraulic pump in parallel, and direction control valves are provided at the outlet side of each pressure compensation valve to supply a discharged pressurized fluid from the hydraulic pump to a plurality of actuators. The pressure compensation valves include a check valve portion establishing and blocking communication between the pump discharge line and the inlet port of the direction control valve, and a pressure reduction valve portion for supplying a reduced pressure from the pump discharge line. The check valve portion shifts in a valve opening direction in response to an inlet pressure and shifts in a valve closing direction in response to an outlet pressure. The pressure reduction valve portion has a first and a second pressure chamber.

Abstract: A metal sheet bending machine for bending a metal sheet inserted between an upper bender and lower bender to a desired angle. While the metal sheet is being bent to the desired angle, a linear image of projected measuring light, which rotates with a change in the bending angle of the metal sheet, is formed by a measuring light source on an outer face of the bent metal sheet and sequentially photographed and stored. Based on the stored images, the bending angle of the metal sheet is calculated. Based on the result of the calculation, the positions of tile upper and/or lower benders are controlled whereby the metal sheet can be bent to the desired angle.

Abstract: A drive circuit, for use with a transmissive scattered liquid crystal display device, prevents a residual image caused by a high speed display switching, while having a reduced size and fewer parts, thereby improving reliability. The drive circuit comprises a shift register (3a), a first gate for functioning as an AND circuit (2a), a second gate for functioning as an exclusive OR circuit (2b), and a switching device (7) with a higher withstand voltage than a logic signal. These constructional elements are formed within an IC. A logic signal for driving the liquid crystal display device is input to the second gate (2b). The output of the buffer (8) is connected to a totem pole drive circuit (10) for driving a common electrode (C) with a high voltage (HV) which is synchronized with the logic signal.