Abstract: A spindle unit comprising a solid shaft main spindle of a highly rigid material such as cemented carbide, with the main spindle being rotatably supported in a spindle head by bearings less apt to generate heat. A tool-clamping device including an adapter attached to a front end of the main spindle, and a tool holder carries a rotary tool. On of the adapter and the holder comprises a short columnar lug, with the other of the adapter and holder comprising a cylindrical hole shrinkage-fitted on the lug. The member having the hole is made of a material having a coefficient of thermal expansion lower than a coefficient of thermal expansion of the other member. The tool-clamping device further comprises heating and cooling devices for heating and cooling the member having the hole.

Abstract: A small watercraft has a hull formed such that the center of buoyancy is slightly aft of the structural center measured in the longitudinal direction of the hull. The craft is equipped with an engine mounted near the center of buoyancy within the hull, and has such auxiliary parts as an oil tank and a muffler which are arranged around the engine. The upper portion of the wall surrounding the engine compartment for the engine may be constructed to protrude upwardly, and a hood with a seat may be mounted over the compartment opening such that the hood can be removed. The joint between the bottom edge of the hood and the upper edge of the surrounding wall of the engine compartment may be located above the draft line of the hull when it is stationary and occupied by the rated number of persons.

Abstract: A vertical machining center, which comprises a pallet clamp unit and a pallet conveyor unit arranged along the front face of the bed. A saddle is provided on the upper surface of the bed, with the saddle being slidable along the X axis. A column is provided on the top surface of the saddle, with the column being slidable along the Y axis. A headstock is provided on the front face of the column, with the headstock being vertically slidable. A tool magazine and an automatic tool exchange device are both arranged alongside the bed, and a numerical control unit is provided for numerically controlling the saddle, the column, the headstock, the pallet clamp unit, the pallet conveyor, the tool magazine and the automatic tool exchange device.

Abstract: A vertical machining center equipped with a rotary pallet changer, the center comprising a pallet clamp unit provided along the front face of the bed, with the clamp unit holding a pallet in a vertical position, and being capable of rotating around a horizontal axis. A rotary pallet changer provided in front of a front face of a bed of the vertical machining center, a saddle provided on an upper surface of the bed. The being saddle is slidable along the X axis, and a column is provided on a top surface of the saddle, with the column being slidable along the Y axis. A headstock is provided on a front face of the column with the headstock being slidable along the Z axis. A tool magazine and an automatic tool exchange device are arranged alongside the bed with a numerical control unit being provided for numerically controlling the saddle, the column, the headstock, the pallet clamp unit, the rotary pallet changer, the tool magazine and the automatic tool exchange device.

Abstract: An NC lathe comprising a box-shaped bed, a headstock unit and a cutting tool unit each mounted on the bed, a work supplying device provided under the headstock unit, a numerical control unit wherein the bed comprises a first installation surface and two second installation surfaces, the first and second installation surface crossing at right angle to each other, the first installation surface includes a Z-axis and an X-axis crossing at right angle therewith, the headstock unit comprising a headstock reciprocally movable along the Z-axis on the first installation surface, and the cutting tool unit comprising a tool carrier reciprocally movable along the X-axis.

Abstract: A digital control color illumination system is disclosed for use in a visual system of an industrial robot or the like. This system comprises: image memories to store the color data regarding illumination patterns of three primary colors of red, green, and blue; video signal producing circuits each for reading out the data from the image memory and converting it to the video signal indicative of the illumination pattern; video projectors each for projecting the light of the illumination pattern represented by the video signal onto an object to be illuminated; and a color TV camera to pick up the object image. The image data picked up is processed by a computer system to produce the data which is stored into the image memories. With this illumination system, the scanning of the illumination patterns, and the change, adjustment, storage, and the like of the illumination patterns can be executed by software in accordance with programs preliminarily stored in the program memory in the computer system.