Abstract: The combination optical film of the invention comprises a plurality of optical films in which at least one end face of the optical films are butted against one another, wherein the butted end faces substantially match one another in shape, the butted end faces each have a portion non-vertical to the front and back surfaces of the optical films, and the end faces are butted against one another so as not to form a continuous gap in the normal direction of the optical films from the front to back surfaces. The combination optical film can prevent light leakage without degrading appearance.

Abstract: The combination optical film of the invention comprises a plurality of optical films in which at least one end face of the optical films are butted against one another, wherein the butted end faces substantially match one another in shape, the butted end faces each have a portion non-vertical to the front and back surfaces of the optical films, and the end faces are butted against one another so as not to form a continuous gap in the normal direction of the optical films from the front to back surfaces. The combination optical film can prevent light leakage without degrading appearance.

Abstract: A design and production supporting system for component arrangement and routing comprises a three-dimensional (3-D) component mapping means based on two-dimensional logical connection information of plant components and 3-D arrangement space information. To the 3-D component mapping means, an interactive mapping means and an automatic mapping means are provided. The interactive mapping means has a means for displaying the components arranged on the assigned plane of the arrangement space in the 3-D space keeping connection relationship among the components and a means for interactively moving these components in the arrangement space with keeping connection relationship among the components by using the dragging method. The automatic mapping means has a means for distinguishing the arranged spaces from the non-arranged spaces and arranging the components on the non-arranged spaces, and a means for searching the shortest route of pipes, etc., for the arranged components.

Abstract: A display apparatus and a modelling method for computer graphics includes a first memory for storing a first three-dimensional model, a detailed model, of a body represented by at least one of desired first number of dimensions, a desired first number of parameters and desired first parametric quantities, an arithmetic unit for arithmetically determining a second three-dimensional model, a simplified model, by varying at least one of the first number of dimensions, the first number of parameters and the first parametric quantities to at least one of a second number of dimensions, a second number of parameters and second parametric quantities in accordance with an algorithm for thereby creating automatically a simplified model for a body of less importance. A second memory stores the simplified model. A selector selects the first three-dimensional model or the second three-dimensional model by reference to a preset index for evaluation.

Abstract: A four wheel drive working vehicle having transmission clutches separately operable for driving right and left rear wheels. Power for driving right and left front wheels is transmitted thereto from a change speed device through a front differential, while power for driving the rear wheels is transmitted thereto from the change speed device through the transmission clutches, respectively. When the front wheels are steered from a straight running position beyond a predetermined angle in order to turn the vehicle, the transmission clutch corresponding to the rear wheel lying on the inside of the turn is disengaged while the transmission clutch corresponding to the outside rear wheel remains engaged. Consequently, the rear wheel lying on the inside of the turn and describing the smallest turning radius is placed in free rotation state. The working vehicle can change running directions and make small, sharp turns smoothly without a rear differential.

Abstract: A rolling clutch apparatus having two one-way transmission mechanisms arranged axially of a drive shaft and a driven shaft. Each transmission mechanism includes an inner ring defining a conical outside surface, an outer ring disposed coaxially with the inner ring and defining a conical inside surface, and tapered rollers arranged between the conical surfaces of the inner and outer rings. The transmission mechanisms are shiftable at the same time so that the rollers in one of the transmission mechanisms are displaced axilly to be pressed between the conical surfaces of the inner and outer rings whereby the inner and outer rings rotate together to transmit drive.

Abstract: A power transmission comprising a drive shaft and a driven shaft connected to each other to be relatively rotatable within a predetermined range. The connection between the two shafts includes a cam member axially slidable on the driven shaft. The driven shaft carries a brake device interlocked with the cam member. When an accelerating force is transmitted from ground wheels to the driven shaft, the cam member slides axially of the driven shaft. This sliding movement causes the brake device to brake the driven shaft.

Abstract: A display apparatus and a modelling method for computer graphics includes a first memory for storing a first three-dimensional model, a detailed model, of a body represented by at least one of desired first number of dimensions, a desired first number of parameters and desired first parametric quantities, an arithmetic unit for arithmetically determining a second three-dimensional model, a simplified model, by varying at least one of the first number of dimensions, the first number of parameters and the first parametric quantities to at least one of a second number of dimensions, a second number of parameters and second parametric quantities in accordance with an algorithm for thereby creating automatically a simplified model for a body of less importance. A second memory stores the simplified model. A selector selects the first three-dimensional model or the second three-dimensional model by reference to a preset index for evaluation.

Abstract: A grass cutting system for use on a walking operator type or a riding type lawn mower as mounted between front and rear wheels. This grass cutting system comprises a cutting blade rotatable on a vertical axis, a grass catcher disposed above the cutting blade and defining a top opening, and a housing surrounding the grass catcher. A cylindrical space is defined between the grass catcher and the housing, through which grass clippings are fed with air currents from the cutting blade to the grass catcher.

Abstract: A hydraulic construction for a working vehicle comprising a transmission case housing a hydraulic clutch and defining a lateral opening, and hydraulic control device mounted on an inner face of a cover attached to the transmission case to close the opening, the hydraulic control device acting to control oil flows to the hydraulic clutch. The hydraulic control device is hydraulically connectable to oil passage device connected to the hydraulic clutch when the cover is attached to the transmission case.

Abstract: A hydraulic circuit construction for a power shift transmission having logical operation valves mounted on a pressure oil supply passage connecting a hydraulic clutch to a pressure oil source, the logical operation valves being operable to engage and disengage the hydraulic clutch by opening and closing the pressure oil supply passage in response to a switching operation of a change speed device connected upstream of and in series to the hydraulic clutch. The pressure oil supply passage has mounted thereon a pressure control device including a first valve mechanism, a second valve mechanism and an orifice parallel-connected to the pressure oil supply passage, and an accumulator is mounted between the pressure control device and the hydraulic clutch to assure a speedy and smooth operation of the hydraulic clutch.