Abstract: A tool attaching/detaching device is disclosed in which a tool depressing member is slidingly engaged with a body portion of a clamp nut, and balls are inserted into spaces defined between taper surface portions of the clamp nut and taper surface portions of the tool depressing member. A ring member is used to cover the spaces. An inner diameer of the ring member is changed along its inner circumferential surface.

Abstract: An automatic planing machine has two feed rollers on one side of the machine and a stool for holding two pressure rollers which are pressed toward the feed rollers with a pressure force smaller than a pressure force of the feed rollers. The machine has a compact driving mechanism for rotating the feed rollers and further has a feed mechanism for move the stool and a casing for holding the feed rollers toward and away from each together with back-lash preventing means.

Abstract: An automatic planning machine has a vertical stationary stool functioning to cut a workpiece flatly and a vertical movable stool opposed to the stationary stool. The stationary stool has a plurality of feed rollers while the movable stool has a plurality of pressure rollers. A pressure force by the pressure rollers can be selectively changed over thereby to push the workpiece on the stationary stool at the time of flat work and to push the workpiece on the movable stool at the time of thickness determination work.

Abstract: A circular saw device having a variable cut-off angle includes a rotary table provided on a base, and a rotatable circular saw mounted on the rotary table to be movable upwardly and downwardly. A locator is provided on the base and has a curved front central portion concave backwards so that the locator does not interfere with the saw. The locator is movable between a first and a second position depending upon the cross-sectional size of the workpiece to be cut by the saw. The locator is placed in a first position when the workpiece has a small cross-sectional size and in a second position when the workpiece has a large cross-sectional size. Fitted members are provided in the bottom of the locator and are irremovably fitted in guide holes of the base so that the members are slidable in the holes to move the locator from the first to the second position. Pins are provided in the locator and are removably fitted in the small holes of the base to place the locator in the first or the second position.

Abstract: A scroll saw having a blade includes a body, a piston connected to the blade as to be moved upwardly and downwardly, and a motor for driving the piston upwardly and downwardly. A hung member is removably secured to the sawing blade. A pulled-down member is removably secured to the other end of the blade. A hanger is engaged with the hung member, and an arm secured to the body is configured so as not to interfere with the workpiece. A pulling-down member is engaged with the pulled-down member, and a suspension unit including a spring is attached to the arm and adapted to tension the blade by the elastic restoring force of the spring as the piston moves. The scroll saw machine is appropriately used as a fixed-installation type or a hand-held type saw.

Abstract: A table saw has a circular saw table, a miter table and a supplementary table to form a working table, on the front and rear sides of which two guide rails are disposed slidably with respect to the working table. The miter table has a miter fence thereon whose pivot points are provided at two separate positions.

Abstract: A variable cutting-angle circular saw device includes a base; a rotary table 2 rotatably disposed in the central portion of the base; a bracket liftably attached to a hinge; a motor, a speed reducer, a circular saw, an outer cover, and a safety cover, all being fixed to the bracket; a fence fixed in a rearward position of the base; a clamp fixed at left- and right-hand positions of the device so as to allow a workpiece to be clamped for cutting the workpiece. A sawdust-guiding frame piece is suspended from a lower end of a rear portion of the cover so as to smoothly block a gap between the lower end of the rear portion of the outer cover and an upper surface of a curved portion in the central portion of the fence, guiding the sawdust blowing up via the blow-up port, to the inner side of the rear end of the outer cover. A sawdust accommodating chamber below the rotary table is closed at the bottom and has a substantially arcuate bag-like shape, and communication with the cover via a port at the rear thereof.

Abstract: A saw blade position setting apparatus of a working table such as a table saw which is mounted on a support frame and to which a blade assembly is mounted with a handle assembly including a handle and a handle shaft held by the support frame to be rotatable and operatively connected to the blade assembly. The blade assembly is supported by a support member connected to the handle shaft. A clutch mechanism is selectively transmitting rotation of the handle to a blade assembly elevating mechanism and a blade assembly inclining mechanism. The elevational position and the inclination of the blade assembly are adjusted in accordance with the rotation of the handle assembly. A rack is secured to the support frame and the handle assembly is moved along the rack to a predetermined angle position. A lock lever is disposed in operative association with the handle assembly and operatively connected to the clutch mechanism.

Abstract: A hand-held scroll saw having a blade includes a body having a handle provided at the upper portion of the body, a foot plate provided at the lower portion of the body so as to be slid on a workpiece which is to be cut by the saw, a piston provided over the front portion of the plate so as to be moved upwardly and downwardly, and a motor provided between the handle and the plate so as to move the piston up and down. A hung member is removably secured to the sawing blade at the upper end thereof, and a hanger is secured to the piston at the lower end thereof and engaged with the hung member. A U-shaped arm having an upper portion secured to the body and a lower portion located near the lower end of the blade so that the arm does not interfere with the workpiece. A pulled-down member is removably secured to the blade at the lower end thereof, and a pulling-down member is engaged with the pulled-down member.

Abstract: In a dust collector, dust and waste materials such as wood chips and shavings are collected in its casing through a dust collecting duct by a dust collecting fan rotated by a motor. The dust and waste materials thus collected are compressed and extruded by an extruding screw which is rotated by the motor, whereby the dust and waste materials can be readily discarded.

Abstract: A joint machine having a fence and a fence position adjusting mechanism. The mechanism adjusts a vertical position and angular orientation of the fence with respect to a pair of fence supporting members upstandingly extending from a base which accommodates therein a cutter. a hand gripper is provided between upper end portions of the fence supporting members. The mechanism includes a pair of fence fixing means. One of the fence fixing means fixes both the vertical position and angular orientation of the fence, whereas the other fixing means fixes the vertical position of the fence.

Abstract: A radial arm saw, comprising a base having a column mounted thereon with a guide arm supported vertically movably on the column. The guide arm has an inverted U-shape. A saw member slides along the bottom of the guide arm by means of bearings engaging symmetrically arranged longitudinal grooves in the side walls of the arm. The grooves have lower faces inclined downwards towards the centerline. The bearings are similarly inclined and can be adjusted axially. A rectangular U-shaped locking spring is engaged with the saw member support so as to have one of the arm side walls between its arms. When the locking spring is compressed, the saw member is locked along the arm. An integral switch case is fitted within the arm and has an integral bendable cover to cover a recess for a power switch. The switch has an ON-button which can be locked to be inoperative. The back of the switch case and the arm support on the column have corresponding U-shaped grooves for fitting a wire support tray.

Abstract: An intake system for an engine is disclosed in which an inlet passageway for one cylinder includes a common inlet passageway and first and second branch inlet passages having a branch portion at a downstream side of the common inlet passageway, said first branch inlet passage communicating with a first inlet port and said second branch inlet passage communicating with a second inlet port; said first inlet port having an opening for the cylinder and being designed to allow air to be admitted into the cylinder in a direction in which the air swirls therein, and said second inlet port having an opening therefor and being designed to cause air to be admitted thereinto in a direction it disturbs formation of such swirls; and said inlet passageway being provided at its inner wall portion with a wall member for deflecting air admitted from the common inlet passageway toward the first branch inlet passage.

Abstract: A duplicating router of the type in which a cutter unit provided with a motor and a cutter is fed vertically and horizontally with respect to a base. A cutter unit feeding screw rod is installed parallel with guide bars and rotates for operation on a vertical guide frame formed through framing left and right guides fitted movably up and down in elongated guide grooves provided on vertical guide plates fixed on both sides of the base and two parallel guide bars supporting the cutter unit for movement to the left and right, thus forming a screw feeding means. A link handle in a link motion is connected between the base and the left and right guides, thus forming a link feeding means. A template is fixed on upper portions of the vertical guide plates. A duplicating recessed groove is formed in the template in the direction orthogonal to an upper surface of the base.

Abstract: A bench stand in which two bisymmetric stand are coupled together by a pair of cross-linked flat bars. Their bottom ends are bolted to the legs of the stands. Their top ends can be bolted to any of a series of bolt holes in the legs. The middles of the flat bars are screwed together at a series of positions corresponding to the bolt holes on the legs. Thereby, the width of the bench stand can be varied. Additionally, height adjustable auxiliary legs are attached to the bottom of the main legs. Parallel slits inclined to the axes of the legs are formed in the auxiliary leg are a bolt through one of the slits is tightened to the main legs.