Abstract: An optical fiber cutter includes a base that includes a pair of clamps, a blade member moving base that includes a disk-shaped blade member and is configured to move the blade member and bring an outer circumferential edge of the blade member into contact with a surface of the optical fiber, and a pressing that press-bends a scratched portion of the optical fiber to cut the optical fiber. The blade member is rotatably fixed to the blade member moving base to change a position of the outer circumferential edge to be in contact with the optical fiber. The base further includes a rotating member that is rotatably fixed to the base and configured to rotate to transmit power to rotate the blade member, and power transmission between the blade member and the rotating member is releasable.

Abstract: Systems and methods for milling saw blade tooth profiles and saw blades with milled tooth profiles are disclosed herein. The systems include blade milling systems that include a milling head, a blade support structure, a blade advance structure, and a control system. The methods include supporting a saw blade, advancing the saw blade, and machining a finished tooth profile in a working portion of the saw blade with an end mill. In some embodiments, the machining may include operatively translating the end mill relative to the saw blade with a milling head and within a plane that is at least substantially perpendicular to an end mill rotational axis. In some embodiments, the machining may include dry-machining the finished tooth profile in the working portion of the saw blade in a single pass. The saw blades include a plurality of teeth and may include at least one relief region.

Abstract: A method of producing an endodontic file that involves grinding in a plane substantially parallel to the longitudinal axis of a rotating dental instrument blank. By grinding the dental instrument blank in this manner, the torsional strength of the resulting endodontic file is not eroded during its production, thereby providing a file that is less susceptible to breakage during its use.

Abstract: Apparatus and methods for automatically training (i.e., straightening) saw blades along a saw mandrel are disclosed.

Abstract: An apparatus useful for sharpening blades includes a blade support, a sharpener guide mounted to the blade support, and a sharpener mount. The sharpener guide includes an elongated guide member defining a sharpening axis extending substantially parallel to a blade axis defined by the blade support. The sharpener mount includes a pivot connector coupled to and complementally configured with the elongated guide member for enabling pivotal movement of the sharpener mount about the sharpening axis and translational movement along the elongated guide member. The sharpener mount may be coupled to a rotary grinder having a grinding wheel, such that the sharpener mount and the grinder may pivot to provide a desired sharpening angle on the blade and move the grinder along the blade while the blade remains in place on the blade support.

Abstract: A curved and toothed cutting blade for a trimmer comprising a base body having at least a connecting member for mounting onto a trimmer and a longitudinal cutting edge on one side which is symmetrically concave downward and has teeth, wherein the curve of the cutting edge is in the form of a segment of the interior of a circular arc of a lens with the two interior angles of any teeth not having different degrees of angle and the dent in between any two teeth being not perpendicular to the base pitch of the tips of the two teeth and slanted towards the center point of the curve of the cutting edge; and a grinding wheel for manufacturing the cutting blade, wherein the cutting blade is manufactured by a grinding wheel which is in the form of a lens with the two endpoints truncated with diameter being the largest in the middle and gradually decreasing towards the two ends and the surface of which has grooves of sizes and shapes which correspond to the sizes and shapes of the teeth of the cutting blade.

Abstract: An indexing device for successively positioning a tool element relative to an apparatus adapted to perform a series of operational tasks on said tool element comprises a base, a reciprocally movable support mounted on the base, a fixing member adjustably mounted on the support for fixing the tool element thereto, a pivotable arm mounted to the base and extending between the support and the apparatus, an indexing abutment mounted on the arm and positioned thereon to contact a part of the tool element. The support is moved in a first direction to bring the tool element in a task performing position with the apparatus. The movable support has a pusher to contact the arm and to cause pivotal movement of the arm when the support is moved in this first direction whereby the arm and the abutment are moved away from the task performing position. Thereafter, the arm is returned to a subsequent task performing position when the support is moved in a second direction opposite the first direction.

Abstract: It is to provide a saw chain sharpener such that while a saw chain is clamped at both ends by a holding plate, which is supported forward of a handy type electric motor, so as to stabilize its sharpening posture, a grinding tool such as a round rod-shaped grinding tool or a round rod-shaped grindstone, which is attached to an end of the electric motor, is rotated at a high speed so as to sharpen, at a side thereof, the saw chain efficiently. A support member is projected forward from a sharpener body which is formed such that a round shaft-shaped grinding tool for grinding is attached to an end of a handy type electric motor.

Abstract: A device for dressing a tool having a plurality of teeth, wherein said device comprises a support surface having guiding elements, said guiding elements having at least two movable positioning elements, said movable positioning elements being adapted to be locked in a fixed position within said guiding elements such that said positioning elements form a stop for said tool; and a dressing tool mounted in a holding device positioned in front of a dressing side of said support surface, wherein said dressing tool is locked in position by a locking element during the dressing of said teeth, hence said dressing tool not being movable at least in a direction running substantially parallel to said dressing side; wherein said positioning elements are arranged in said guiding elements in said support surface such that said tool to be dressed engages with said positioning elements at its side turned towards said dressing side of said support surface, so that said tool can be moved towards said positioning elements by a

Abstract: The invention is in the field of adhesive binding of sheet-form printed materials arranged in stacks and, in particular, is directed to a method and device of the type that cuts side edges of sheet-form printed materials with tool. According to various aspects of the invention, a tool having a cutting edge and a notching element is provided as well as a method of making the tool, and a method of changing a depth of notching by changing an angle of rotation relative to a cutting plane is described.

Abstract: A band saw profiling machine includes an indexing mechanism having a feed finger mechanically linked to a caliper finger for reciprocating movement therewith. The caliper finger is urged toward the feed finger during an indexing movement of the indexing mechanism to measure the spacing between adjacent teeth of a band saw blade on-the-fly and concurrently with advancement and sharpening of the saw blade. The tooth spacing measurement is then used in the band saw sharpening machine to provide feedback for a subsequent indexing movement of the indexing mechanism, to accurately position the band saw blade for sharpening of a row of teeth. A control unit of the sharpening machine accepts input of shape factors from an operator that define the pattern of motion of the indexing mechanism, the grinding wheel, or both, for sharpening of irregular tooth shapes.

Abstract: A band saw profiling machine includes an indexing mechanism having a feed finger mechanically linked to a caliper finger for reciprocating movement therewith. The caliper finger is urged toward the feed finger during an indexing movement of the indexing mechanism to measure the spacing between adjacent teeth of a band saw blade on-the-fly and concurrently with advancement and sharpening of the saw blade. The tooth spacing measurement is then used in the band saw sharpening machine to provide feedback for a subsequent indexing movement of the indexing mechanism, to accurately position the band saw blade for sharpening of a row of teeth. A control unit of the sharpening machine accepts input of shape factors from an operator that define the pattern of motion of the indexing mechanism, the grinding wheel, or both, for sharpening of irregular tooth shapes.

Abstract: A computer-controlled band saw sharpener employing electrically powered, X and Y axis drivers, each having a reciprocating element. The X-axis driver actuates a feed finger mechanism, to index the saw in repetitive, stepped fashion, while each tooth is successively ground. In concert with the X-axis driver, the Y axis driver repetitively lowers and raises a grinding head, provided with a rotary grinding wheel. Both the X and Y axis drivers include servomotors to rotate the shaft of an elongated ball screw. A carrier box houses a non-rotatable ball screw nut. The nut travels back and forth along the ball screw shaft in accordance with its direction and extent of rotation. Drive arms for the feed finger mechanism and the grinding head mechanism are bolted at their lower ends to a threaded bushing in the nut carrier box. The computerized controller is programmable, to produce virtually any desired tooth shape in the saw.

Abstract: A saw blade sharpening machine includes a receiving and positioning chuck assembly for setting a saw blade in a grinding position in a plane corresponding to a main saw blade plane; and a grinding device which has a first and a second grinding head for grinding opposite tooth flanks of a saw tooth of the saw blade and an arrangement for moving the first and second grinding heads independently from one another towards and away from the saw blade plane in a direction perpendicularly thereto.

Abstract: The machine includes a saddle (26) which is displaceable along a spindle axis (E) and transversely thereof under numerical control. A tool spindle (28) is supported on the saddle (26) so as to be driven in rotation about the spindle axis (E) and adapted to be equipped with a disc-shaped tool for cutting work to be done on a workpiece (10). The machine further includes a workpiece slide (42) which is displaceable along the workpiece slide guide (40) under numerical control and carries a workpiece support (44). The tool (30) is embodied by an electrically conductive member of an electric circuit (30, 36, 46, 48, 10) which is closed through the workpiece (10) when this is touched by the tool (30). The tool spindle (28) is adapted to be driven by a motor (84) which can be switched from a rotational operating speed to do cutting work on the workpiece (10) to a rotational measuring speed which is considerably slower.

Abstract: A grinding machine, which preferably serves in sharpening saw-blades, particularly circular saw-blades, has a machine frame that supports a device for supporting the saw blade and for fixedly clamping the blade and for advancing the saw-blade tooth-by-tooth. The grinding attachment has two spindles or shafts, which operate independently of one another, and are preferably oriented perpendicular to one another, and preferably support separate drives. The grinding attachment is mounted to pivot and be adjusted in three spatial directions. In a selected pivoting position, one of these spatial directions (Z direction) is oriented radially with respect to the saw blade. In this position, the axis of rotation of one spindle is oriented in the circumferential direction, and the axis of rotation of the other spindle is oriented in the radial direction. A grinding attachment of this type permits the hollow-grinding of tooth faces with grinding pencils that have a small diameter.

Abstract: A tool head (46) in which a tool spindle (52), adapted to be equipped with a disc-shaped tool (100), is supported so as to be driven in rotation about a spindle axis (C), is associated with a workpiece support (82) on which a workpiece (10) can be arranged such that the tooth tip (18) of a cutting tooth (12) to be machined will lie on a stationary reference axis (A). The tool head (46) is movably supported by means of a reciprocating slide (34) which is movable back and forth along a reciprocating slide guide means (32) transversely of the reference axis (A), by means of a feed slide (24) adapted to be advanced along a feed slide guide means (22) transversely of the reciprocating slide guide means (32), and by means of a a pivot bearing means (42) defining a pivot axis (B) parallel to the reciprocating slide guide means (32).

Abstract: A blade sharpener for band saws used in the lumber and other wood processing industries, is installed on the band saw structure for sharpening the band saw blade periodically as required without need to remove the blade from the saw. The sharpener apparatus is retractable within the band saw frame when not in use, permitting the saw to be used normally. When the blade requires sharpening, the apparatus is extended and clamped about the blade. The blade is advanced to the proper position, and the sharpener is actuated to sharpen each of the teeth of the band saw blade in place on the saw. The mechanism includes an automatic shutoff to preclude further sharpening operation once the blade has been advanced through a full cycle and all teeth have been sharpened. The sharpener also includes adjustments for tooth pitch, hook angle, and tooth or gullet depth, enabling the device to be useable for sharpening virtually any band saw blade configuration.

Abstract: A pivot body (22) mounted on a machine bed (20) so as to be capable of swinging defines a lift axis (D) which extends transversely of its own pivot axis (A) and along which a reciprocating slide (24) is movable. Infeed of a saddle (26) on the reciprocating slide (24) can be effected along a spindle axis (E) transversely of the lift axis (D). A tool spindle (28) adapted to receive a tool (30) is supported on the saddle (26) so as to be driven in rotation about the spindle axis (E). Furthermore, a workpiece slide (42) is guided for traversing movement on the machine bed (20) and, together with a workpiece support (44), it defines a central plane (G) extending at right angles to the pivot axis (A). An advance finger (58) is adapted to be engaged intermittently with a respective one of the cutting teeth (12) of a workpiece (10) in order to advance the same.

Abstract: A saw chain is automatically sharpened during use by causing top sides of the cutter links to be pressed against a stationary abrasive block when the saw chain is running around a rim type sprocket. The cutting link includes a cutting edge, and a depth gauge recessed radially from the cutting edge by a distance defining the cutting depth. The generally cylindrical outer periphery of the drive sprocket has raised steps or ramps formed thereon which lift the front end of the cutter links relative to the rear ends, thereby allowing a sufficiently large cutting depth to be achieved without locating the depth gauge far in front of the front rivet. This reduces vibration and instability of the saw chain when sawing.

Abstract: A method of and apparatus for handling a band saw for the purposes of effecting manufacturing and/or repair operations upon the band saw characterized by, during such manufacturing and/or repair operations upon the band saw (5), supporting the band saw in such manner that the weight of the band saw (5) is not carried by an edge of the band saw (5). The support includes rotatable supports (24, 25) for supporting the band saw; the rotatable supports being positionally adjustable to accommodate differing band saw lengths; and in that adjustments are provided for enabling the rotatable supports to be displaced to advance the band saw to a machining station (22) for defining a working station/position at which a manufacturing and/or repair operation can be effected.

Abstract: A chain saw stabilizing bench is disclosed which permits the sharpening of chain saw cutting teeth under field conditions. The bench consists of an extended planar platform for holding the weight of the saw and an upright holder for securing the saw bar against movement. The bench platform may be supported between upright supports or on any relatively flat surface such as the ground. A fastening means holds the chain saw securely to the bench. A seat at the end of the bench opposite the upright bar holder is provided for the person using the bench and positions the person so that both hands may work the sharpening file while easily and comfortably applying downward force on the file. The weight of the person using the bench keeps the bench from moving.

Abstract: A grinding apparatus for side grinding the cutting teeth of band saw blades, in which the band saw blade is oriented in a vertical loop. The apparatus is controlled by a programmable controller and includes redundant indexing mechanisms capable of feeding both right-handed and left-handed saw blades past dual, opposed side grinding elements that side grind the working portion of the sawtooth to predetermined radial and tangential clearance angles and desired dimensions.

Abstract: A machine for use in the manufacture of saw blades includes apparatus for performing a plurality of machining operations on the tips of individual teeth of the saw blades. Each tip to be machined is positioned in turn at a point coincident with a horizontal axis X normal to the body of the saw blade. The machine includes a main frame having a pivot coincident with the axis X. The front face and top face are machined by apparatus supported on a first yoke mounted on the pivot and situated to the right of a vertical plane containing the axis X. All other apparatus for machining other aspects of the blade tip including the side faces, steel relief, face profiling, grooving, bevelling, quill grinding, etc., are supported on a second yoke mounted on the pivot and situated to the left of the vertical plane containing the axis X.

Abstract: A sharpener frame is supported relative to a floor and has a front side. A first portion of a band saw is supported at the front side of the frame. A second portion of the band saw is also supported relative to the frame, parallel with the first portion of the band saw, and also at the front side of the frame in one of two locations. Each location is on a different side of the first supported portion of the band saw. A clamp for the band saw tooth being sharpened includes a pair of plates having upper edges generally conforming to the profile of a saw tooth for clamping a substantial portion of the tooth in a fixed position relative to the frame during sharpening. The plates are released after sharpening for positioning a different tooth between the plates. A coolant supply system moves a liquid coolant through channels in the plates that have outlets adjacent to the tooth edge for cooling the tooth during sharpening.

Abstract: An indexing system for a saw regrinding machine includes a rotary shaft on which a circular saw is mounted and an index stop assembly which stops rotation of the blade to position the teeth thereof for a regrinding operation. The stop includes an index finger interposed into the path of the blade by an air cylinder which is controlled by a timing cam. The air cylinder includes an output piston that pushes a counterweight causing it to rotate about a pin. A finger member is attached to the counterweight and at appropriate times rotates about the pin to intercept a particular saw tooth in a position to permit it to be sharpened by a grinding wheel.

Abstract: A sharpening tool has a flat central portion circular plate to which is affixed circumferential abrasive bead having convex profile and formed of an abrasive grit bonded by epoxy to the plate. The tool is less wide than the spacing between the depth gauge and the cutting tooth of a chain saw blade and is mounted to a motor which is pivotal on a frame to bring the sharpening tool into position between the depth gauge and the cutting tool. The sharpening tool may then be urged against the cutting tooth to cut a desired tooth profile.

Abstract: A circular saw sharpener comprising a base mounted on a work table at the top, a bracket pivoted thereto at the top which bracket has a L-shaped frame pivoted thereto at the top for holding a motor and a grinding wheel, a guide arrangement mounted on said bracket at the bottom for guiding the circular saw blade to be sharpened, a feed mechanism mounted on said base and controlled by a hand lever to carry the circular saw blade to be sharpened toward said grinding wheel for grinding. The level position of the circular saw blade to be sharpened can be adjusted by an adjusting knob. The angular position of the sand wheel can be adjusted by a lock screw, to fit the inclination of the teeth on the circular saw blade to be sharpened.

Abstract: A base member has a clamping surface and an arm extending from the base member at an angle. The arm is attached to the base member for pivotal movement and supports a power grinder for grinding a saw blade tooth by pivotal movement of the arm. The base member supports a clamp that releasably clamps the sharpener to a saw blade by engaging the blade between the clamping surface and the clamp. The base member has at least one projection adjacent the clamping surface that has insert engagement in at least one of the apertures in a saw tooth that are used for tool insert and removal of the tooth from the blade. A pair of the projections are provided for teeth that have two apertures. For teeth with one aperture only, a second projection on the base member is located on the base member for engaging a gullet portion of the tooth.

Abstract: A device for grinding saw blades, both hand saws and circular saws so that a predetermined tooth profile is obtained, utilizes a grinding head that moves in one plane and moves the saw in a second plane. The device comprises a saw blade mount, an indexing system for indexing a saw tooth to move in a first plane, a grinding head to grind a saw tooth, a grinding head travel arrangement to move the grinding head in a second plane, the second plane being at an angle of about 35.degree. from the perpendicular of the first plane, and a control system for controlling movement of the saw blade in the first plane and the grinding head in the second plane to ensure a predetermined saw tooth profile is ground.

Abstract: A top and face grinder for a circular saw blade including an indexing apparatus which interposes a stop into the path of the teeth of the saw blade from a position laterally displaced from the plane of the saw blade. This stops rotation of the blade and permits a grinding operation to take place. At the end of the grinding operation the stop is retracted to permit continued rotation of the saw blade. The grinding stroke position of the grinding wheel is adjusted by rotating a cam which passes through the fulcrum of a rocker arm providing reciprocal motion for the grinding wheel.

Abstract: A disc-shaped grinding wheel has a peripheral grinding edge, and according to one feature of the invention a centered grinding point is used on the grinding wheel for precise and symmetrical sharpening of right and left cutter elements of a saw chain. The chain is supported by a chain holding bar which in turn is supported on a pivot support on the base of the machine. The pivot support provides adjustment of the bar for oblique engagement of the grinding wheel with the cutter elements. The pivot support also provides a tilting adjustment of the chain holding bar for engagement of the grinding wheel with the cutter elements at a secondary angle whereby to sharpen chisel bit chains. The pivot support also allows the machine to sharpen chipper tooth chains.

Abstract: An adjustable holder for a chisel-bit type saw chain is arranged to hold cutter elements of the chain adjacent the grinding edge of a grinding wheel for sharpening the cutter elements wherein the angle of grind can be adjusted. For this purpose, the chain holder has pivotal support on a base with a radius directed to the grinding point of the grinding wheel. Also, the holder supports the cutter elements such that their pivot support is at the grinding point. No other adjustments of the motor and grinding wheel assembly or the chain holder is necessary.

Abstract: Segmental grinding wheel for forming the tip of intersecting surfaces on tools includes an array of peripherally extending and circumferentially, spaced segments. Each segment includes first and second grit-coated angularly oriented grinding surfaces. Another array includes similar grinding segments which are interdigitated in alternating sequence with the segments of the first array. The segments of the two arrays are concentric and partially coextensive in the axial direction of the wheel so that the plane of rotation of the first grinding surface of each segment in one array intersects the plane of rotation of the second grinding surface of an adjacent segment in the other array along a line which represents the tip of the intersecting surfaces.

Abstract: Saws are made by grinding teeth in an edge of a continuously advanced steel strip. The grinding is performed by abrasive members mounted on a frame which is oscillated in an endless path within a plane parallel to a plane of the strip so that the abrasive members intermittently contact the edge.

Abstract: A base is arranged to be secured in a fixed position adjacent a grinding wheel of the type having a pair of grinding surfaces extending in different planes. A slide arm is mounted in the base and carries a single grinding wheel dressing tool with two positions. One such position is for grinding one of the wheel surfaces and the other position is for grinding the other wheel position. The structure and mounting of the dressing tool on the support is such that it is precisely positioned in each of its two positions for dressing the grinding surfaces.

Abstract: A device for sharpening chain saw cutter teeth includes a rigid disc member which has an abrasive coating deposited on its outer circumferential edge. The abrasive coating has a circumferential outer grinding surface which, when viewed in cross-section on a plane which is perpendicular to and radial to the disc member, has a curvature which is adapted to conform to the curvature of a concave surface in a common type of chain saw cutter tooth. The device can be mounted to a common rotary tool such as a bench grinder or a portable grinder to manually sharpen a chain saw in an inexpensive and efficient manner.

Abstract: A pair of grinding wheel dressing tools are mounted on a common support slidably mounted in a base secured in a fixed position adjacent a grinding wheel. The support has adjustment for repositioning it as the grinding wheel wears and requires dressing. The adjustment for the support maintains the pair of wheel dressers in their selected dressing planes as adjusted positioning between the wheel dressers and the grinding wheel occurs.

Abstract: Apparatus for sharpening teeth on a stump grinding machine which includes a clamp for mounting a grinder directly on a cutting tooth. The clamp has jaws having rotatably mounted appendages which clamp directly on the back and the front face of a cutting tooth. The jaws include an adjustable arrangement for mounting the grinder motor and positioning a grinder wheel for sharpening a cutting tooth. When securely clamped on a cutting tooth a grinding motor may be mounted on the clamp and the clamp rotated about an axis through the cutting tooth face causing the grounding wheel to sharpen the cutting edge.

Abstract: An automatic sharpener for a chain saw in which a securing mechanism is released by a grip portion thereof, and a sleeve-like member is moved forward with respect to the main body by urging force of a spring so that the grindstone thereof can be automatically pushed forward from its retracted position upto the position at which the teeth of the saw chain are set, and a grindstone receiving body can be slightly moved forwardly or rearwardly with respect to the main body thereof by rotation of a screw.

Abstract: A method of and apparatus for machining a blade (1) having a plurality of cutting teeth positions with each such position mounting a material cutting tip (7) having faces (13, 16) which co-operate to provide the cutting edge(s) or cutting profile (19) of the teeth, in which the machining of said faces of any tooth is completed before commencing the machining or corresponding faces of next tip to be machined.

Abstract: An automatic dual side grinder is disclosed. A circular saw blade is supported and rotated in angular increments for grinding of each saw tooth. A pair of radially-opposed, parallel grinding wheels are reciprocated, by a crank assembly radially of the blade to grind opposite sides of each tooth. The crank assembly is driven continuously by a DC electric motor. An electric control circuit for the motor has two subcircuits, each including a resistor which determines motor speed. Control is switched between the subcircuits synchronously with reciprocation by a switch actuated by a rotating cam on the crank assembly. The resistors are preferably variable rheostats. Different rheostat settings are used to grind a saw tooth at one speed and retract the grinder at a second, higher speed.

Abstract: A hand-held, motor driven apparatus for sharpening saw blades wherein a small grinding drum having its axis transverse to the saw blade provides a hollow ground sharpening action and the body of the apparatus extends over each side of the grinding drum to shield each side of the grinding site to thereby provide optimum safety for the operator.

Abstract: A chain saw sharpening device having a generally U-shaped frame defined by an upper web and first and second parallel side walls for overlying the chain and the guide bar of the chain saw. The frame includes an open area near the center of the upper web defining a sharpening area. Clamping screws are associated with the frame to secure the frame to the cutting bar and an additional clamping screw is associated with the frame for engaging the link of the tooth to be sharpened in order to fix its position with respect to the sharpening area of the frame. A tooth stop for adjusting the position of the tooth with respect to the sharpening area of the frame is mounted on a sliding block received in a keyway in the upper web of the frame, the keyway being parallel to the longitudinal axis of the channel in the cutting bar for the chain.

Abstract: A saw blade supported on a slip-on arbor has a pitch which is greater than the maximum possible stroke of the feeding means. For this reason each individual tooth of the saw blade is pushed in two successive forward strokes, first into an intermediate position by a secondary pawl and then into a working position by a principal pawl. During the advance caused by the secondary pawl the latter is supported at a stop which is formed at a drag lever. The drag lever is pivotable about the slip-on arbor and comprises a guide engaged by a pin. The stop thus moves back and forth on a circular arc about the slip-on arbor causing the secondary pawl to engage a certain location of the tooth face of a tooth it is advancing.

Abstract: An articulated assembly of members such as a workpiece support in a machine tool comprises three and preferably four members, each successively rotatably mounted on the previous member, and each successive axis of rotation being inclined relative to the preceding axis of rotation. The axis of rotation of the third member on the second member is preferably inclined at 45.degree. to the other axes of rotation and the three axes intersect at a common point which is preferably at the center of a workpiece mounted on the table surface of fourth member. In this way the workpiece can be presented to a tool at any desired angular disposition with little or no positional displacement.

Abstract: In view of the production of saw blades, a continuous sheet metal strip first runs through a hardening surface. Subsequently, the teeth are ground by a grinder. Thereafter, the sheet metal strip is passed through a grinder comprising two parallel grinding wheels to process by the grinding wheel end sides the sides of the sheet metal strip. The outer ends of the laterally projecting teeth are worked by another grinder. After such a treatment of the sheet metal strips, saw blades are formed by cutting off individual length sections.

Abstract: A pair of companion saw blade tooth set dies are provided for guided relative movement toward and away from each other relative to a support structure from which a saw blade may be guidingly supported for predetermined indexed positioning of right and left set teeth thereon relative to the location of the aforementioned companion tooth set dies. The dies, when moved into engagement with the right and left set teeth of the saw blade, are operative to engage and bend the right and the left set teeth back to and past neutral set positions and to the reverse set positions with the previous right and left set teeth comprising left and right set teeth, respectively, and the bend areas of the reverse set teeth being formed in the longitudinal marginal portion of the blade from which the teeth project.

Abstract: Combinations of fixture assembly parts assembleable to provide fixtures to support and convert a small high speed electric grinder such as a "Dremel" brand tool into a lathe, a router, a circular saw blade sharpener or a shaper. All of the fixture parts are formed of simple sheet metal shapes and common screw machine hardware fittings such as bolts, nuts, washers and threaded rods. The sheet metal shapes are formed with simple holes and slots thus the parts for the fixture assemblies are very inexpensive to manufacture. The parts are also very simple to assemble and disassemble into the various configurations.

Abstract: A controllable linear drive means (32) is pivotable about a first pivot axis (B) in parallel with the axis (A) of a saw blade (10). A pawl carrier (22) which carries a feed pawl (26) is reciprocable by the linear drive means (32) in circumferential direction of the saw blade (10). The pawl carrier (22) is supported by a guide rod (46) which is pivotable about a second pivot axis (D) parallel to the first pivot axis (B) and is of adjustable effective length. A guide body (18) which comprises a radial guide means (20) with respect to the first pivot axis (B) is pivotable together with the linear drive means (32) associated with the guide body, about the first pivot axis (B). The pawl carrier (22) is guided along the radial guide means (20). The feed pawl (26) is fixed rigidly at the pawl carrier (22). The guide rod (46) is a member pivoted at the guide body (18) and forming part of a second controllable linear drive means (42). The apparatus is suitable for saw blades (10) of very different sizes.