Abstract: The present invention relates to a method for controlling a power output of an engine of a crawler vehicle; such as, large sized bulldozers, at a time when shoe slip of such crawler vehicle occurs in operation, the crawler vehicle being provided with working equipments; such as, dozing units or blades, ripping units or rippers or the like. More particularly, the present invention relates to an adaptive engine power output mode setting method for automatically keeping the engine of the crawler vehicle in an optimum power output condition according to rates of the shoe slip or shoe slip rates of the crawler vehicle.

Abstract: This invention provides a hydraulic circuit apparatus for operating a work-implement actuating cylinder arranged such that, during an earth compacting operation using a bucket, a work implement or boom is lowered by its own weight, and during other operations, a part of the fluid under pressure in a lifting chamber of the actuating cylinder is supplied together with pressurized fluid discharged by a pump into a lowering chamber to increase the retracting speed of a piston rod in the work-implement actuating cylinder. The apparatus comprises a spool slidably inserted in a valve bore formed in an operating valve body so that it may be moved between a first actuating position, where a second port connected to the lowering chamber is communicated with a second tank port and a first port connected to the lifting chamber is communicated with a first pump port; and a second actuating position, where the second port is communicated with a second pump port and the first port is communicated with a first tank port.

Abstract: A radiative-type air-conditioning unit capable of being freely moved to and set in different positions, and used to deal with the problems concerning the unevenly distributed heat loads in a closed office in which a plurality of office automation (OA) machines are installed. This radiation air-conditioner consists of a radiation endothermic/radiating plate including a radiation generating surface (21) formed on one side surface of a panel (20), a plurality of thermoelectric elements (22) attached to the other side surface of the panel (20), and a plurality of heat exchanger means (25) attached to the other surfaces of these thermoelectric elements (22). Accordingly, noise does not occur in this radiation air-conditioner, and maintenance work therefor is substantially not required. Since this radiation air-conditioner can be installed in a small space owing to its small weight and thickness and compact structure, it is used very extensively.

Abstract: The present invention is used as a method and an apparatus for effecting piercing start on a member to be To enable a suitable piercing start and good cutting qualities, a slag-deposition preventive (14) is applied to a portion to be pierced of a member (30) to be cut and the vicinity of the same, and a piercing start is thereafter effected, thereby preventing the slag from being deposited on the portion to be pierced and in the vicinity of the same. The apparatus has a reciprocatingly movable carriage (11) on which a plasma torch (12) of a plasma cutter mounted. An applicator (10) for applying the slag-deposition preventive is mounted on the carriage, the applicator being capable of moving together with the plasma torch (12). The apparatus is arranged to easily apply the preventive (30) to a selected portion of the member (30) to be cut.

Abstract: An anti-dross-attachment agent application apparatus for plasma cutting, suitable for effecting a piercing start on a member to be cut, and designed to unman or automatize the plasma cutting operation. An anti-dross-attachment agent jetting nozzle (4) and a pump (7) capable of moving together with a plasma torch (1) of a plasma cutting machine are attached to a reciprocating base (2) on which the plasma torch is mounted. The apparatus has a piping (8) for supplying compressed air to the nozzle, an electromagnetic valve (9) for opening/closing the pipe passage thereof, and a controller (11) for controlling the operations of the pump and the electromagnetic valve. The arrangement may alternatively be such that an anti-dross-attachment agent spray can (34), an actuator (39) for depressing a valve of this spray can, and a nozzle tube (36) are attached to a reciprocating base on which said plasma torch is mounted, and that a controller (11) for controlling the operation of the actuator is provided.

Abstract: A wavelength detecting apparatus which assures that the wavelength of a laser light can be detected with accuracy is disclosed. In the subject invention, the temperature of the vapor obtained from an element such as a mercury which contains plural isotopes is elevated in excess of a predetermined temperature so that an emission line of the element becomes plural emission lines. One of the divided emission lines is used as a reference light for the detection of the wavelength of the light to be detected. In addition, a specific isotope of the element may be selected from plural isotopes of a reference element to thereby provide a narrowed emission line for use as a reference light.

Abstract: This invention provides a hydraulic circuit apparatus arranged such that when each of operating valves is operated suddenly, the stability of each of actuators is improved, and when the operating valves are kept at their neutral positions, the flow rate of fluid discharged by a variable displacement pump is increased to improve the response of the hydraulic circuit, and when the actuators are supplied with pressurized fluid, pressure compensation is made by pressure compensating valves.

Abstract: A bedding apparatus includes a culture mechanism for accommodating a cultured tissue together with a nutrient solution for culturing the tissue; a selecting mechanism selects cultured tissues on the basis of color and magnitude, and the selected culture tissues are bedded one-by-one on a nutrient medium. A density detecting mechanism detects the density of the cultured tissues and responsive thereto a feeding mechanism selective feeds nutrient solution or pure water to the cultured tissues.

Abstract: Herein disclosed is a transferred plasma arc torch capable of obtaining an excellent cut face having a small angle of inclination even in the case of cutting a thick plate. In the torch, the tip of an electrode holder (2) holding an electrode (3) fixedly is enclosed by a nozzle (1) forming a tapered working gas passage (4) together with the electrode holder (2). The nozzle (1) has such a chamber (7, 7a, 7b or 7c) inside of a throat (1a) formed in the tip of the nozzle (1) as faces the electrode (3). The following relations are satisfied if the throat diameter of the nozzle (1) is designated at d and if the diameter and axial length of the chamber are designated at D and H, respectively: 1.5.ltoreq.D/d.ltoreq.10; and 0.75.ltoreq.H/D.ltoreq.5. A swirler (6) for generating a swirling flow is disposed upstream of the working gas passage (4).

Abstract: An apparatus for determining correct mounting of a die assembly on a press brake is intended to determine whether the die assembly mounted on the press brake corresponds to the kind of work to be worked. Back-gauges are first located at predetermined positions and thereafter, they are displaced so that a distance from the center of a die to an end surface of the same is measured by distance sensors. Results are memorized as shape data on the die with respect to each of various kinds of works.

Abstract: A reliable pilot valve assembly having a control lever is produced at low cost while installed without requiring any additional switch and wiring and piping work. The assembly has a main valve body (1). A spool (27) is slidably mounted in the body (1) so as to be movable between a first and a second position. The spool (27) permits the pressure oil to circulate in a forward direction through a pair of the outlet ports and a pair of main outlet ports of the assembly when the spool (1) stays in the first position, and permits the pressure oil to circulate in a reverse direction (opposite to the forward one) through the pair of the outlet ports and the pair of the main outlet ports when the spool (1) stays in the second position, the main outlet ports being connected with a hydraulic circuit.

Abstract: A hydraulic circuit arranged to prevent the load pressure in one of the hydraulic actuators at the time of starting from becoming abnormally high thereby preventing fluid under pressure from being relieved by the safety valve when a plurality of hydraulic actuators are operated at the same time, wherein the function of one of the pressure compensating valves is temporarily enhanced by introducing the load pressure in the hydraulic actuator so as to supply a large quantity of fluid under pressure to the hydraulic actuator connected to the pressure compensating valve so that the operating speed of the hydraulic actuator can be increased.

Abstract: During shift change, a discrimination is made as to a load, a quantity of residual hydraulic oil in respective shift change clutches (F, R, 1 to 4) and a state of shift change which has been effected from what speed stage to what speed stage so that a pattern of electrical commands to be issued to pressure control valves (51 to 56) for required shift change clutches is variably controlled depending on results derived from the above discrimination. Thus, smooth shift change can always be achieved regardless of running conditions. Electrical commands (C.sub.1 to C.sub.6) to be fed to the respective pressure control valves (51 to 56) are compared with electrical currents (I.sub.1 to I.sub.6) outputted from drive circuits and outputs (S.sub.1 to S.sub.6) from clutch pressure detecting means (101 to 106) for each clutch, whereby an abnormality is detected with the relevant clutch based on results derived from the comparison.

Abstract: There is disclosed an immature plant grafting apparatus capable of seizing en bloc a plurality of saplings raised in array irrespective of a scatter in diameters of stems without requiring hand works and damaging the saplings and of grafting the saplings at a remarkably high efficiency but at low costs. The grafting apparatus has a plurality of induction plates (9a and 9b) formed with a plurality of induction grooves (10) open to seizing surfaces, corresponding to the number of saplings (3a and 3b) to be seized and their positions, induction plates so attached to upper and lower surfaces of one of a pair of seizing devices (4 and 5) as to protrude from the seizing surfaces, and buffer members (13) projecting from the seizing surfaces of the other seizing device so that each buffer member is fitted in between the pair of induction plates.

Abstract: A position measuring apparatus easily and accurately detects the position of an underground excavator, such as a shield excavator, during the underground excavation, and particularly the position thereof on a horizontal plane. The position measuring apparatus comprises a transmitter (10) including at least two cable loops (10a, 10b) which generate AC magnetic fields; a receiver (30) which detects the AC magnetic fields and produces signals representative of the detected fields; and a computing unit (60) which identifies the signals with respect to the originating cable loop and which calculates the position of the underground excavator (20). The two cable loops (10a, 10b) are substantially perpendicular to each other. The receiver (30) includes two magnetic field detecting elements (S.sub.1, S.sub.2) which are substantially perpendicular to each other. The receiver (30) is rotatably driven so as to maintain the magnetic field detecting elements (S.sub.1, S.sub.

Abstract: A stock separating apparatus which separates stocks that drop successively from a stock feed source through a chute and feeds them one by one to a working machine, for example, a forging press, the apparatus being capable of coping with a change in the size of stocks with ease and within a short time. The stock separating apparatus has an attachment (11) that is provided at the lower end of a chute (3), the attachment being replaceable in accordance with the size of stocks (2). A circularly curved lower chute (6) is provided at the lower end of the chute (3). The attachment (11) is detachably attached to an attachment holder (10) which is horizontally pivotably provided on a support member (12) that is secured to the apparatus body (1) through a bracket (4).

Abstract: A serial control apparatus includes a main controller (2) and a plurality of nodes (3) each serving as an auxiliary controller normally serially arranged on a loop-shaped signal transmission line (1). Each node (3) extracts data for the present node among from the data delivered from the main controller (2) as time elapses so as to allow the terminal units (A) associated with the present node to be properly controlled. In addition, the node inserts the output data from the terminal units (A) into a time slot corresponding to the present node and then delivers to the signal transmission line (1) the output data which in turn are transferred to the main controller (2) via other nodes on the downstream side. To assure that the data extracting circuit operates properly, two latching circuits, i.e., first and second latching circuits (311, 312 to 315) are serially arranged in a signal passage by way of which the extracted data are fed to a driver (316) for the corresponding terminal units.

Abstract: The present invention relates to a method of machining plate materials with a plasma cutter and plasma torch. This method is one in which the density of a magnetic flux formed in the range between the vicinity of the surface of an electrode material 3 fixed to the front end of the electrode and the vicinity of the nozzle opening 1b of a nozzle 1 is between 10 and 200 gauss. The magnetic flux is generated by a magnetization apparatus 4 disposed in the vicinity of the electrode 2 of a plasma torch 100. A workpiece 26 is cut by a plasma arc emitted from a nozzle, the diameter d of which is 1.5 mm or less. The plasma torch 100 for use in this method is equipped with a magnetization apparatus 4 in the vicinity of the electrode 2 and the nozzle diameter d is 1.5 mm or less. The above magnetization apparatus 4 is disposed on the same axis as the axis center of the nozzle opening 1b.

Abstract: A method and an apparatus for performing measurement by a resistivity method in order to detect the thickness of a sludge layer on the outer periphery of a shield machine. A Wenner electrode row (14) on the outer periphery of the machine is used to measure reference resistivities to thereby detect certain resistivities in the depth direction of the natural ground and the sludge layer thickness. At the same time, a dipole electrode row (16) is used to measure voltage distributions in the depth direction of the natural ground and in the direction of the arrangement of the electrodes. The ratios of the values measured by the measurement dipole electrodes to those measured by the reference Wenner electrodes are calculated, and their distribution is charted. When mutually equal values in the distribution map are connected together by continuous curves, a contour-pattern image is obtained, which enables a configuration of the collapse of natural ground to be determined.

Abstract: The present invention provides a wavelength detecting apparatus for detecting the wavelength of a light (11) to be detected with reference to a reference light (31) by allowing the reference light (31) generated and transmitted from a light source (30) and the light (11) to be detected to be irradiated toward an etalon (62) and then detecting the light which has permeated through the etalon (62) by optical detecting means (64). The reference light and the light to be detected are incident on the focusing surface (50) which is located in front of a collimeter lens (61). The incident light is transformed into a parallel light in the collimeter lens (61) and the parallel light is then irradiated toward the etalon (62).