Abstract: A guiding device for a rotatable, circular saw blade of a house-building saw. Such a saw comprises a bench-shaped stand (2) with a frame (98) which is movable therein and on which the saw blade (12) is rotatably mounted, and an operating mechanism (26) for raising and lowering the frame (98) in the stand (2). According to the invention the guiding device comprises guide elements (90, 92) whereby the frame (98) can also be moved along the bench surface (4) after the frame (98) has been moved to near an upper position.

Abstract: A saw comprising a saw assembly including an upper saw blade guard and a motor which can be actuated by an on-off switch arrangement and can rotatingly drive a saw blade mounted on the assembly. The saw assembly is pivotably mounted on a saw table such that the saw assembly can be lowered towards the table to cut a workpiece resting on the table. The saw includes a lower moveable guard which is pivotably mounted to the upper guard so that the lower guard is moveable to expose a saw blade mounted on the assembly and a guard lock arrangement is used for locking the lower guard over a saw blade mounted on the saw assembly when the saw is not in use. The guard lock arrangement includes a guard lock lever moveably mounted to the saw assembly.

Abstract: A machine tool has a work table which defines a working surface and has a cutting tool which is attached to and movable with respect to the work table. The position of the cutting tool with respect to the working surface is controlled by a mechanism which elevates the cutting tool with respect to the working surface and angulates the cutting tool with respect to the working surface. The cutting tool is mounted to a support plate which is pivotably attached to the work table. The elevating mechanism includes a threaded rod and a nut which engages a pivoting link. The pivoting link also engages the cutting tool. Rotation of the threaded rod pivots the link which in turn raises and lowers the cutting tool. A spring biases the cutting tool towards its lower position to remove play between the components. The angulating mechanism includes a lever, two cams and a locking rod. Rotation of the lever moves the locking rod longitudinally due to the action between the two cams.

Abstract: A mechanism is mounted on a bench saw for adjusting the height of the blade of the bench saw. The bench saw includes an opening on the table, a first aperture on an inner side surface of the table facing the opening, a block fixed under the table and projected inwardly from the inner side surface of the table, a pivotal plate member sized to the opening so as to rest on the portion of the top surface of the block, and a slit on the pivotal plate member with a portion of the blade projected above. The adjustment mechanism comprises a second aperture on the side of the pivotal plate member facing the first aperture, a T-shaped groove adjacent and in communication with the second aperture, and a T-shaped member including a vertical trigger section and a horizontal bar section having a first end extended through the second aperture to receive in the first aperture and the other portion received in the horizontal part of the T-shaped groove in a locked position.

Abstract: A frame structure for power saw machine includes a main frame including a first and second main arms in parallel manner, a main post vertically supported by the first main arms, and a supporting shaft horizontally extended from a top portion of the main post for rigidly supporting a power saw assembly thereon, a supporting frame including a supportive column downwardly extended from the main post, a pair of support pillars each extended from a bottom end of the supportive column to the first main arm at a predetermined angle, and a support arm extended from the bottom end of the supportive column to the second main arm, and a collecting tray having a receiving cavity wherein the supporting frame is fittedly disposed therein so as to substantially support the main frame on the collecting tray.

Abstract: A table saw includes a table disposed on a housing, a plate supported in the housing, a follower rotatably secured to the plate with a pivot axle, a saw blade rotatably secured to the follower with a pole and rotated in concert with the follower relative to the plate. A motor is coupled to the pole, with a pulley-and-belt coupling or the like, for driving the saw blade via the pole. A threaded shaft is engaged with a gear sector of the follower for rotating the follower relative to the plate and for moving the saw blade upward and downward relative to the table.

Abstract: Apparatus for releasably adjusting a position of a first portion of a device relative to a second portion of the device. The first portion includes a first surface, and the second portion includes a second surface. A workpiece support surface is defined by the first and second surfaces, and the first surface is rotatable relative to the second surface. A locking mechanism is provided to selectively restrain rotation of the first surface relative to the second surface. An indexing mechanism optionally is provided including a detent mechanism which selectively restrains rotation of the first surface relative to the second surface in one of a plurality of predetermined positions.

Abstract: A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone.

Abstract: A kerf indicator for use with a power saw provides a source of light directed towards a blade of the saw. The light passes through a plurality of slots in an opaque barrier member. The barrier member planarizes the light such that a shadow of the saw blade is cast on a workpiece accurately indicating the location and width of a kerf, or cutting path, to be produced by the saw blade on the workpiece.

Abstract: A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone.

Abstract: A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone.

Abstract: A guiding device for a rotatable, circular saw blade of a house-building saw. Such a saw comprises a bench-shaped stand (2) with a frame (98) which is movable therein and on which the saw blade (12) is rotatably mounted, and an operating mechanism (26) for raising and lowering the frame (98) in the stand (2). According to the invention the guiding device comprises guide elements (90, 92) whereby the frame (98) can also be moved along the bench surface (4) after the frame (98) has been moved to near an upper position.

Abstract: Woodworking machines are disclosed having a blade adapted to cut workpieces, and an actuating mechanism operable to move the blade toward the workpiece. The machines also include a detection system configured to detect one or more dangerous conditions between a user and the blade, and a reaction system configured to stop the movement of the blade toward the user upon detection of a dangerous condition by the detection system.

Abstract: A machine tool has a work table which defines a working surface and has a cutting tool which is attached to and movable with respect to the work table. The position of the cutting tool with respect to the working surface is controlled by a mechanism which elevates the cutting tool with respect to the working surface and angulates the cutting tool with respect to the working surface. The cutting tool is mounted to a support plate which is pivotably attached to the work table. The elevating mechanism includes a threaded rod and a nut which engages a pivoting link. The pivoting link also engages the cutting tool. Rotation of the threaded rod pivots the link which in turn raises and lowers the cutting tool. A spring biases the cutting tool towards its lower position to remove play between the components. The angulating mechanism includes a lever, two cams and a locking rod. Rotation of the lever moves the locking rod longitudinally due to the action between the two cams.

Abstract: In a perforating apparatus which has a holder to which a perforating blade can be fastened, the perforation is produced via the movement of a piston by the piston pressing against an air cushion, which in turn transmits this pressure to a perforating piston which presses the perforating blade downward. A positioning device which directly varies the position of the piston unit relative to the housing surface is provided for the zero setting of the piston.

Abstract: A machine tool has a work table which defines a working surface and has a cutting tool which is attached to and movable with respect to the work table. The position of the cutting tool with respect to the working surface is controlled by a mechanism which elevates the cutting tool with respect to the working surface and angulates the cutting tool with respect to the working surface. The cutting tool is mounted to a support plate which is pivotably attached to the work table. The elevating mechanism includes a threaded rod and a nut which engages a pivoting link. The pivoting link also engages the cutting tool. Rotation of the threaded rod pivots the link which in turn raises and lowers the cutting tool. A spring biases the cutting tool towards its lower position to remove play between the components. The angulating mechanism includes a lever, two cams and a locking rod. Rotation of the lever moves the locking rod longitudinally due to the action between the two cams.

Abstract: A table saw apparatus includes a table, a saw blade, a motor, a belt-pulley mechanism, a bracket mounted pivotally on the table and connected to the motor, a saw frame mounted pivotally on the table and including a tubular seat which is connected to the saw blade and which is movable downward when the saw frame turns forward and which is movable upward when the saw frame turns rearward, a connecting unit interconnecting the tubular seat and the motor, and a height adjustment unit mounted on the table and including a first rotary drive member connected drivingly to the saw frame so as to move the saw frame forward or rearward.

Abstract: A cutting machine with built-in miter cutting feature includes a miter cutting arrangement connected between a table frame and a cutting head such that the cutting head is capable of rotating in a vertical manner along a supporting arm upwardly extended from the table frame. Also, the cutting machine can be adjusted to accommodate cutting work in at an angle with respect to a cutting table by rotating the miter cutting arrangement by means of a pivot shaft connected therein.

Abstract: An improved chop saw may include a base assembly, a blade assembly including a blade having a center and a motor for driving the blade, an arm pivotally attached to the base assembly and carrying the blade assembly, the blade assembly being movable between a lower position for engaging and cutting a workpiece disposed on the base, and an upper position not engaging the workpiece. The chop saw further includes a vise for holding the workpiece in place, the vise including a vise screw, a latch support supporting the vise screw, and a vise jaw disposed at the end of the vise screw. Preferably, the maximum distance between the vise jaw and the latch support is about equal or shorter than the distance between the blade center and the latch support, when the blade assembly is at the lower position. Further the chop saw includes a substantially horizontal handle connected to the blade assembly.

Abstract: A product for cutting cables with spiral-wound, metallic casings. The product includes a frame having a base portion and a carriage portion pivotally attached to the base portion. The base portion has a receptacle for supporting a cable to be cut. A pair of rip saws are mounted on the carriage portion. Each of the rip saws has a rotating blade positioned for engagement with a cable in the receptacle at an orientation parallel to the longitudinal axis of the receptacle. A crosscut saw is mounted on the carriage portion between the rip saws. The crosscut saw also has a rotating blade positioned for engagement with a cable in the receptacle. This latter blade is oriented perpendicular to the longitudinal axis of the receptacle. In use, the carriage portion is manually pivoted toward the base portion to simultaneously engage the blades of the rip and crosscut saws with a cable in the receptacle.

Abstract: A throat plate insert for a table saw is provided having a scale on the upper side thereof adjacent the region of the elongated slot for the circular saw blade. The scale provides an indication of the height of a specified diameter saw blade corresponding to the chordal length of a segment of saw blade protruding through the elongate slot.

Abstract: An apparatus for sequentially and automatically cutting a piece of dimension lumber at a number of predetermined angles to produce a building component, such as a rafter or truss web or chord, with composite or compound angles, is disclosed. The apparatus includes infeed and outfeed tables tiltable about a longitudinal axis and equipped with fences along which a workpiece moves longitudinally via moving devices. Clamps hold the workpiece at different positions relative to a cutting station during a cutting operation. A cutter, which for example includes a circular saw blade, is mounted for a positioning movement about a vertical axis at the cutting station, as well as for vertical movement to cut a workpiece at a predetermined composite or compound angle.

Abstract: An improved base structure of a circular saw includes a base, a rotatable base plate mounted on the base, a mounting seat, and a rotary seat. The base plate has an upper face provided with a recess at a rear end. The mounting seat is screwably secured on both sides of the recess, and has a pivot portion with a screw hole at a bottom end. The pivot portion is located in the recess. The rotary seat can rotate relative to the mounting seat and is provided with a curved slide groove for receiving an adjusting screw. The rotary seat has a pivot portion at a bottom end that corresponds to the pivot portion of the mounting seat.