Abstract: A socket pin for electrically connecting a semiconductor substrate to a test substrate, comprising: a pin head; a pin body configured to support the pin head; and a length adjusting part provided below the pin body; wherein: the length adjusting part comprises at least a portion protruding from the pin body and a resilient structure; and the length adjusting part is movable to change a length of the portion protruding from the pin body as the resilient structure distorts.

Abstract: A fabric circle cutter having a cutter base, a pivot pin assembly, and a blade assembly. The cutter base has a flat, smooth bottom surface with a turned up edge. The cutter base also has a raised base section which has a pivot point slide slot. The pivot pin assembly is slidably mounted on the raised base section and slidably mated with the pivot point slide slot which provides for selective positioning of the pivot pin assembly. The blade assembly has a rotary blade with a blade axis which is aligned approximately horizontally with and approximately parallel to the center line of the pivot point slide.

Abstract: The reaming tool comprises a cutting part having a peripherally arranged reaming cutter which, upon rotation about a center axis of the reaming tool, defines a cutting circle of nominal diameter. The reaming tool further comprises at least two peripherally arranged guide elements, which lie on a guide circle arranged eccentrically to the center axis or having a larger diameter than the cutting circle. As a result of this measure, high surface quality is obtained, in particular even in soft materials, since the reaming tool is clamped in the direction of the reaming cutter.

Abstract: A fabric circle cutter having a cutter base, a pivot pin assembly, and a blade assembly. The cutter base has a flat, smooth bottom surface with a turned up edge. The cutter base also has a raised base section which has a pivot point slide slot. The pivot pin assembly is slidably mounted on the raised base section and slidably mated with the pivot point slide slot which provides for selective positioning of the pivot pin assembly. The blade assembly has a rotary blade with a blade axis which is alined approximately horizontally with and approximately parallel to the center line of the pivot point slide.

Abstract: An improved structure of a circle-cutting tool has an outer ring seat having a round hollow groove and a placing surface. A rotary disc is pivoted into the round hollow groove of the outer ring seat for rotation in relation to the outer ring seat, and has a top surface, bottom surface, outer ring portion and central portion. An elongated through groove penetrates through the top and bottom surfaces of the rotary disc in an elongated shape. The elongated through groove is set in a way to be extended from the central portion of the rotary disc to the outer ring portion. An adjustable elastic cutting assembly is pivoted into the elongated through groove in a slidable state in relation to the elongated through groove.

Abstract: A hydraulically-operated ripper tool mounted as an attachment on a hydraulic arm of a carrier or excavator is used for demolition of large metal walled structures such as storage tanks in a very short time. The ripper tool has a sharp point for punching entry holes into the tank walls, so that no torch cutting of entry holes needs to be used, particularly where there might be volatile residues left in the tank. The ripper tool has a concave, sharp inner edge and is operated by the hydraulic arm in reciprocation so as to provide a shearing force to cut quickly through metal walls in “can-opener” fashion. The ripper tool facilitates making long vertical cuts into the tank wall from top to bottom, so that a series of vertical cuts can be made to weaken a side of the tank and allow the top of the tank structure to be brought down.

Abstract: A fruit or vegetable slicer, particularly suitable for slicing between the edible portion of a watermelon and its rind. The slicer comprises a cutting blade made a thin flexible or bendable food compatible material and having at least one cutting edge; a positioning strip; and a connector mechanism for operably connecting distal ends of the cutting blade and positioning strip to each other and adapted to allow the positioning strip and cutting blade to swivel relative to the connector mechanism.

Abstract: A circle cutter for a food sheet comprises a center knob assembly, an arm, and a cutting assembly. The center knob assembly comprises a base portion adapted to contact a food sheet and fix a position of the cutting assembly relative to the food sheet. The arm is adapted to rotate about the center knob assembly. The cutting assembly comprises a cutting portion having a rotatable cutting blade. The cutting assembly is releasably fixed to the arm to cut a generally circular pattern into the food sheet as the arm rotates about the center knob assembly.

Abstract: A circle cutter for a sheet product comprises a center knob assembly, an arm, and a cutting assembly. The center knob assembly comprises a base portion adapted to contact a sheet product and fix a position of the cutting assembly relative to the sheet product. The arm is adapted to rotate about the center knob assembly. The arm has a friction reducing element proximate an end of the arm The cutting assembly comprises a cutting portion having a cutting blade. The cutting assembly is releasably fixed to the arm to cut a generally circular pattern into the sheet product as the arm rotates about the center knob assembly.

Abstract: A circle cutter has a hand crank, a center positioning unit and a cutter unit. The center positioning unit is mounted on one end of the hand crank and has an awl-free foot positioning a center of a circle to be cut or drawn without generating a pierced hole. The cutter unit is mounted adjustably on the hand crank and has a cutting depth adjustable assembly providing multiple cutting depths for cutting things with different thickness. Therefore, to cut or draw a circle with the circle cutter is hole-free, labor-saving and flexible.

Abstract: A rotary disc assembly for use with a cutting tool to cut circles from a material. The rotary disc assembly includes an outer ring frame having an inner flange and a rotary disc, rotatably attached to the inner flange of the outer ring frame. The rotary disc has a radial channel so that when it is placed on the material and the cutting tool is inserted into the radial channel and affixed therein, and when the cutting tool and the rotary disc are rotated relative to the outer ring frame, the material is cut to form a circle.

Abstract: A rotary disc assembly for use with a cutting tool to cut circles from a material. The rotary disc assembly includes an outer ring frame having an inner flange and a rotary disc, rotatably attached to the inner flange of the outer ring frame. The rotary disc has a radial channel so that when it is placed on the material and the cutting tool is inserted into the radial channel and affixed therein, and when the cutting tool and the rotary disc are rotated relative to the outer ring frame, the material is cut to form a circle.

Abstract: A device for cutting sanitary containers, in particular sacks, bags, and/or pouches for stomas, includes a structure (2) provided with a housing portion (3). The housing portion (2) has a cutting plate (4, 10) whereon is set down a container to be cut. The cut is accomplished by cutting elements (23) associated with the structure (2). The cutting elements (13) are adapted to cut a structural portion of the container, defining its inlet. The cutting elements are further provided with adjusting elements (17) to determine the amplitude and the shape of the inlet of the container being prepared, in relation to the shape and the dimensions of the stoma of a patient.

Abstract: A cutter for cutting a pattern in a substrate, said cutter having a base and guide pins disposed on the bottom of the base. The guide pins are placed in a groove on a template. A longitudinally adjustable member supports a blade unit for cutting the pattern into the substrate, where the adjustable member is configured to be slidably positioned within a center track opening region movable towards and away from the guide pins.

Abstract: A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second member for simultaneous pivotal and translatable movement with respect to the base plate. The first member has a first pivot point that is movable along a first axis, while the second member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The first and second members are operably connected to each other at the first and second pivot points. A knob is connected to one of the pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the second member to rotate and slide in an elliptical pattern with respect to the base plate.

Abstract: A circle forming apparatus (100) for a power tool and a method for using the apparatus provides for the formation of circles or circular apertures in a workpiece. A first arm (104) and second arm (106) are rotatably coupled, and a fastener allows a user to secure the first arm relative to the second arm. The second arm includes a pivot point (108), and the first arm includes means (102) for coupling the first arm to a power tool.

Abstract: A circle cutting machine includes a template that is removeably installed in the bottom of a base. On the base bottom surface are a number of segments that define respective grooves for receiving the template. The base has a cross-beam that defines an axis of rotation and that receives a handle. On one end of the handle is a crank. The handle second end holds a cutting arm. A handle spring biases the cutting arm to contact the cross-beam. The handle is slideable in the cross-beam to locate the cutting arm below the plane of the base bottom surface for easy removing of the cutting arm from the handle. An adjuster rigidly locks and resiliently unlocks the cutting arm to the handle. The template has a circular periphery that enters the base grooves, and a tab that is between two segments, when the template is installed.

Abstract: A method for cutting pavement of an asphalt road or a concrete road in a circle for installation of a manhole, by using a cutting blade which has a pavement cutting edge serves as a tip for cutting the pavement and side edges serve as an inclined cutting surface to bore an inside of the pavement cut by the pavement cutting edge, thereby cutting the pavement in a frusto-conical shape.

Abstract: A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second member for simultaneous pivotal and translatable movement with respect to the base plate. The first member has a first pivot point that is movable along a first axis, while the second member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The first and second members are operably connected to each other at the first and second pivot points. A knob is connected to one of the pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the second member to rotate and slide in an elliptical pattern with respect to the base plate.

Abstract: A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second member for simultaneous pivotal and translatable movement with respect to the base plate. The first member has a first pivot point that is movable along a first axis, while the second member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The first and second members are operably connected to each other at the first and second pivot points. A knob is connected to one of the pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the second member to rotate and slide in an elliptical pattern with respect to the base plate.

Abstract: Devices for cutting sod around sprinkler heads. The device may include a handle coupled to a shaft. The shaft may be coupled to a cylindrical cutting assembly that includes one or more blades that are inserted into sod that has grown over a sprinkler head. The cutting assembly is rotated to cut the sod. Alternatively, a cylindrical cutting assembly may be coupled to a drive motor that mechanically lowers the cylindrical cutting assembly into the sod and rotates the cylindrical cutting assembly to cut the sod growing over the sprinkler head.

Abstract: An jig for a hand-held saw having a powered blade includes a slotted trammel arm, one end of the arm being formed for fixably engaging a guide holder of the saw. A clamp assembly fixably locatable on the workpiece includes a frame having a planar, face member for contacting a face of the workpiece, a web member perpendicular to the face member for contacting an edge of the workpiece, the clamp assembly defining a pivot axis that is oriented perpendicular to the face member; a pivot member rotatably connected to the clamp assembly on the pivot axis and projecting from the face member opposite the a web member, the pivot member having a head portion and a shank portion that protrudes the slot of the arm.

Abstract: A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second member for simultaneous pivotal and translatable movement with respect to the base plate. The first member has a first pivot point that is movable along a first axis, while the second member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The first and second members are operably connected to each other at the first and second pivot points. A knob is connected to one of the pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the second member to rotate and slide in an elliptical pattern with respect to the base plate.

Abstract: A slicing machine including a slicing blade for slicing at least first and second product loaves disposed in a side-by-side arrangement using a single rotation of the slicing blade is set forth. A single rotation of the slicing edge about the center of rotation results in a penetration gradient into each of the first and second product loaves that diminishes in magnitude over the single rotation. To this end, the slicing edge may have a profile defined a plurality of constant radius sections. Each constant radius section has a section center defining the center of the constant radius for that constant radius section. Further, each constant radius section has a section center differing from the section center of an adjacent constant radius section. Such a blade and its associated slicing station provide great control of slices from the loaves as they proceed from the loaf to a receiving conveyor of the slicing station.

Abstract: A cutting device is operable with one hand for cutting a circle or an elliptical shape in a sheet of material. In a first embodiment for cutting elliptical shapes, the cutting device includes a first member for placement on the sheet material and a second member for simultaneous pivotal and translatable movement with respect to the base plate. The first member has a first pivot point that is movable along a first axis, while the second member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The first and second members are operably connected to each other at the first and second pivot points. A knob is connected to one of the pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the second member to rotate and slide in an elliptical pattern with respect to the base plate.

Abstract: A paper cutter with a mold board has a base, an adjusting seat, a knife mount, a cutting knife, a bias spring, an adjusting nut, a positioning knob and a holding member. The cutting knife is secured to the knife mount pivotally secured to the adjusting seat. The bias spring is placed in a hole on the adjusting seat and housed in a cavity on the knife mount and retained by the adjusting nut in contact with the knife mount, permitting the cutting knife to be flexibly operated. The adjusting seat is secured to a guide groove of the base. The mold board has plural guide tracks on one side and anti-slip stickers on the other side. The base is slidably mounted to the mold board to make the cutting knife operate with ease, precision and stability.

Abstract: A circular hole cutting device (1) for making a circular hole in an object comprises a bit holder (3) which can be attached to a drive shaft of an electric power tool in such a way that the bit holder (3) with a bit (2) attached to a far end of the bit holder (3) rotates together with the drive shaft on a common axis, a cover (4) which is fitted to the bit holder (3) relatively rotatably about its axis, and a radial rod (5) attached to the cover (4) such that the amount of projection of the radial rod (5) in a direction intersecting the bit (2) can be varied. The physical size of the cover (4) is determined such that the bit (2) projects from a far end of the cover (4). The radial rod (5) has a pivot shaft (52) having a pointed end formed by bending a terminal part of the radial rod (5) approximately at right angles.

Abstract: An apparatus for rendering ovals of adjustable sizes and ellipticity upon various materials. An oval cutter comprises a clickerplate for adjusting the ellipticity of ovals in a single movement. The clickerplate can be rotated about a base using a knob mounted on the clickerplate. One embodiment of this invention comprises a storage compartment in the knob which can hold, for example, extra blades. A further embodiment of this invention comprises an arm that translates through the clickerplate and a swivel plate used for setting the overall size of the oval by locking the arm at a set length. In yet a further embodiment of this invention, ovals can be rendered in either a clockwise or a counterclockwise direction and an arrow can indicate the direction in which the apparatus is set to render ovals.

Abstract: A cutting tool for locating an axis in a first member and cutting a sized hole in a second member overlying the first member. The cutting tool includes a base assembly and a cutter assembly which may be used independently of the base assembly. The cutter assembly includes a guide member, a cutting blade and a handle structure with a face portion. The guide member is coupled to the handle structure and extends from the face portion. The cutting blade is coupled to the handle structure such that the cutting blade extends from the face portion and is spaced radially outward of the guide member. The base assembly has a base structure, a stem member and a pilot aperture. The base structure has a first side adapted to contact the second member and a distal side adapted to contact the first member. The stem member is coupled to the distal side of the base structure and is adapted to engage a hole in the first member to locate the axis in the first member.

Abstract: The invention relates to portable handheld work apparatus including a brushcutter, edge cutter or the like. The work apparatus has a drive motor (1) and a cutting tool (2) driven by the drive motor. The work apparatus includes a guide tube (3) for guiding a drive shaft (4) as well as a handle (5) fixed on the guide tube (3). The drive shaft (4) connects the cutting tool (2) to the drive motor (1). The handle (5) is in the form of a handle bracket (8) and can be pivoted about a pivot axis (7) lying transversely to the longitudinal axis (6) of the guide tube (3) for adjusting the distance (a) of the handle to the guide tube (3). A spring action handle bracket holder (22, 23) is mounted between the handle bracket (8) and the guide tube (3). The handle bracket holder is especially vibration dampening and extends with a component in the direction of the longitudinal axis (6).

Abstract: A hand tool for forming circular cutouts of sheet material secures the material so that no generally central penetration in the form of a pilot hole or the like, is required. The resulting cutout is useful in the construction of an article assembled from a series of such blanks or cutouts, such as a quilt assembled from a large number of blanks with the blanks being sewn together at points of mutual contact about their circumferences. The tool comprises a relatively stationary base hub with a shaft extending upwardly therefrom, and a hand pressure knob mounted on the shaft opposite the base hub. A rotary disc with a radial channel having a cutting arm and rotary cutting blade therein, is sandwiched between the base hub and pressure knob. The tool is placed upon the sheet material and pressure is applied to the pressure knob, with the cutting arm and rotary disc being rotated about the hub and knob to drive the cutting blade in a circular path about the hub.

Abstract: A circular hole cutting device (1) for making a circular hole in an object comprises a bit holder (3) which can be attached to a drive shaft of an electric power tool in such a way that the bit holder (3) with a bit (2) attached to a far end of the bit holder (3) rotates together with the drive shaft on a common axis, a cover (4) which is fitted to the bit holder (3) relatively rotatably about its axis, and a radial rod (5) attached to the cover (4) such that the amount of projection of the radial rod (5) in a direction intersecting the bit (2) can be varied. The physical size of the cover (4) is determined such that the bit (2) projects from a far end of the cover (4). The radial rod (5) has a pivot shaft (52) having a pointed end formed by bending a terminal part of the radial rod (5) approximately at right angles.

Abstract: An apparatus for rendering ovals of adjustable sizes and ellipticity upon various materials. An oval cutter comprises a clickerplate for adjusting the ellipticity of ovals in a single movement. The clickerplate can be rotated about a base using a knob mounted on the clickerplate. One embodiment of this invention comprises a storage compartment in the knob which can hold, for example, extra blades. A further embodiment of this invention comprises an arm that translates through the clickerplate and a swivel plate used for setting the overall size of the oval by locking the arm at a set length. In yet a further embodiment of this invention, ovals can be rendered in either a clockwise or a counterclockwise direction and an arrow can indicate the direction in which the apparatus is set to render ovals.

Abstract: A cutting device is operable with one hand for cutting an elliptical shape in a sheet of material. The cutting device includes an elliptically-shaped base plate for placement on the sheet material and a cutting member for simultaneous pivotal and translatable movement with respect to the base plate. The base plate has a first pivot point that is movable along a first axis, while the cutting member has a second pivot point that is movable along a second axis substantially perpendicular to the first axis. The base plate and cutting member are operably connected to each other at the first and second pivot points. A knob is connected to one of pivot points and is sized to be grasped by one hand and rotated. Rotation of the knob about the one pivot point causes the cutting member to rotate and slide in an elliptical pattern with respect to the base plate to thereby cut an elliptical shape in the sheet of material.

Abstract: A circle cutter, particularly a cutting instrument, is adapted for cutting circles on objects. It includes a rotary disc assembly and a cutting tool. The rotary disc assembly is made up of an outer ring board, a rotary disc, a fixing ring cap and a plurality of beads. The rotary disc mounted to the outer ring board is movably limited in place by the fixing ring cap and are rotatably supported by the multiple beads received in a tunnel defined between the outer ring board and the rotary disc. On the rotary disc are disposed a plurality of holes marked with a numeral that is the diameter of a circle to be cut. The cutting tool has a hollow pen stick and a cutting knife attached to a knife clip that is movably engaged with a holding head. The holding head is further secured to the bottom end of the hollow pen stick and is free to rotate with respect to the pen stick so that the cutting knife can be smoothly guided in a cutting operation.

Abstract: A hand tool for carving a generally ellipsoid shaped vegetable, such as a potato, turnip, radish or carrot, into a predetermined shape, particularly a mushroom shape, is provided. The hand tool includes a hollow elongated cylinder that has a first end terminating in a circumferential cutting surface, a second end, and an outer surface. At the outer surface of the cylinder between the first and second end of the cylinder, there is attached a wire form. The wire form extends outwardly from the outer surface of the cylinder. A cutting wire is attached to the first end of the cylinder and the end of the wire form furthest from the outer surface of the cylinder. Also disclosed is a method of using the hand tool to carve a generally ellipsoid shaped vegetable into the shape of a mushroom.

Abstract: A circular hole cutting apparatus comprising a support frame, having a forward end, a rearward end, a lower end, and an upper end; the forward end forming a cutting bit mounting means, capable of rotatably retaining a cutting bit so that the upper end of the cutting bit may upwardly extend from the upper end of the support frame, and so that the lower end of such a cutting bit may downwardly extend from the lower end of the support frame; and the lower end of the support frame forming a radius arm mounting means, the radius arm mounting means being capable of adjustably retaining a radius arm, so that the rearward end of the radius arm may alternately extend rearwardly from the rearward end of the support frame and retract forwardly from positions rearward of the rearward end of the support frame.

Abstract: A circular material cutter having a disk-shaped base with a rotating top member attached thereto via a spring and shaft assembly. The top member has a handle formed on its top surface and four legs which extend downwardly from the top surface radial edge, and which have cutting wheels rotatably mounted on their bottom ends of the legs. The shaft and spring assembly extends upwardly from the radial center of the base and is held in a spring receiving portion which extends downward from the radial center of the top member. The shaft and spring assembly allows the top member to be rotated above the base, and also biases the top member away from the base when the device is not in use, to keep the cutting wheels in a retracted position. To use the device, one places the device on sheet material to be cut, pushes down on the top member, and twists it 90.degree. using the handle, thereby causing the four cutting wheels to cut a circular piece from a sheet of material.

Abstract: A plastic bottle cutting implement for reducing a plastic bottle such as a PET bottle to an easily compactible form for disposal comprises a cylindrical or part-cylindrical covering member and a blade disposed projecting from the inside surface of this covering member, and the direction in which the blade projects has any angle other than perpendicular and parallel with respect to the imaginary center axis of the cylindrical covering member. A grip part is attached to the outer side of the covering member. The grip part is bar-shaped and is attached projecting from the outer side of the covering member, a hollow part connecting with the inside of the covering member is formed inside the grip part and a sliding fitting slidable inside the hollow part and fixable in any position inside the hollow part and a blade having one end thereof attached to the sliding fitting are disposed inside this hollow part.

Abstract: An apparatus for creating a substantially circular hole in a wall of a vessel of a patient is provided, comprising an elongated circular knife with a proximal end, a distal end with a circular knife edge, and an inner channel, an elongated probe with a proximal end and a distal end, the elongated probe being disposed within the inner channel of the elongated circular knife and being adapted to be moveable axially and rotatably with respect to the elongated circular knife, and a bar formed on the distal end of the elongated probe, the bar being substantially perpendicular to the elongated probe, whereby when the bar is inserted in the vessel through a slit in the wall of the vessel, the elongated probe and the bar may be rotated with respect to the circular knife edge of the elongated cylindrical knife to form a substantially circular hole in the wall of the vessel. A method for creating a substantially circular hole in a wall of a vessel of a patient is also provided.

Abstract: A slicer for slicing cheese and the like articles of food comprising a slicing string being connected to a finger grip at one end. Moreover, the slicer is provided with a shank having an insertion portion adapted to be inserted into the cheese and a gripping portion adapted to be gripped by the user. A second end of the string is connected to the insertion portion.

Abstract: The present invention provides for circle cutters to cut drywall. The circle cutters include a removable pivoting member, a beam and a cutting member. The beam has a groove with teeth in the bottom as well as a slot. The pivoting member includes a surface having teeth for interlocking with the groove teeth. Additionally, one or more contact protrusions can be provided on the bottom surface of the beam for improved circle cutting on textured drywall surfaces.

Abstract: A device for circumscribing selectively both circles and also ellipses of variable proportions includes a housing in which is rotatably mounted an armature. The armature is constrained to move on two axes disposed at right angles to one another, so as to enable elliptical shapes to be generated. One such axis is provided by a rectilinear channel in the base of the device, in which is engaged a follower operatively attached to the armature; the other axis is provided by a rectilinear slot formed through the cover of the device. A hub is engaged in the cover slot and is assembled with the armature; it can be moved to any selected position along a rectilinear axis of the armature without disassembly, and can be secured in position by tightening of a clamping mechanism. In one position the axes of rotation of the hub and the armature are aligned, to thereby cause the device to circumscribe a circle; in other positions the axes are offset, thereby conditioning the device for circumscribing ellipses.

Abstract: A device is disclosed for trimming grass from around a pop-up sprinkler having an annular top and a pop-up head concentrically mounted within the top. The device comprises a handle having a grip mounted on one end. A circular cutting element is mounted on the opposing end, the circular cutting element having a diameter larger than that of the annular top. A centering device mounted within the interior of the circular cutting element engages the pop-up head and centers the device over the top.

Abstract: A multifunction cutting tool includes a cutting head adjustable for straight, free form or circular cutting of glass and tile, interchangeably mountable hobby and hook blades for cutting carpet, PVC, matting and the like, a roller cutter for cutting cloth, wallpaper, leather and similar sheet material, knife and scissor sharpeners and an angled carpet cutter blade mounted in a carriage with a base plate for sliding under the carpet. The tool has blade guards to protect the user from accidental injury and brackets supporting the cutting blades that are stabilized by resilient snap fittings and laterally extending support shoulders. Access to retractable folding hobby and hook blades is improved by the addition of screwdriver tip receiving pivot slots in the blades and the work surface of circular cuts is protected by a suction cup having a recessed and covered metal attachment.

Abstract: A radial guide device for a power saw apparatus to accommodate the radius of the circular pattern to be cut from a hard relatively smooth surfaced planar material. The present invention also contemplates a slidably movable pivot means to adjust a selectively adjustable radius on a fixed guide arm to provide the desired circular pattern in a selected planar material. More particularly, the invention relates to a guide device which allows for a portable electric circular saw to be mounted therein and as an insert to be guided at a desirable fixed radial direction as it transverses the material to be cut.

Abstract: A device for circumscribing selectively both circles and also ellipses of variable proportions includes a housing in which is rotatably mounted an armature. The armature is constrained to move on two axes disposed at right angles to one another, so as to enable elliptical shapes to be generated. One such axis is provided by a rectilinear channel in the base of the device, in which is engaged a follower operatively attached to the armature; the other axis is provided by a rectilinear slot formed through the cover of the device. A hub is engaged in the cover slot and is assembled with the armature; it can be moved to any selected position along a rectilinear axis of the armature without disassembly, and can be secured in position by tightening of a clamping mechanism. In one position the axes of rotation of the hub and the armature are aligned, to thereby cause the device to circumscribe a circle; in other positions the axes are offset, thereby conditioning the device for circumscribing ellipses.

Abstract: An improved measuring and cutting tool is provided, which consists of an extensible tape measure. A mechanism for cutting is on a first end of the extensible tape measure. A structure for guiding is on a second opposite end of the extensible tape measure. The guiding structure will allow the cutting mechanism to make quick and accurate cuts into a piece of soft thin material.

Abstract: A movable and automatic sawing and clamping device for wood, wherein two pipe-like frame portions are separated from each other by a suitable distance. Two sets of horizontal pieces are orthogonal to these portions and are separately provided therebetween. A clamping device can be formed between these horizontal pieces for clamping a saw tool therebetween. The whole clamping framework can be moved by means of a plurality of bottom rollers to cut the workpiece.

Abstract: A circle cutter, particularly a cutting instrument, is adapted for cutting circles on objects. It includes a rotary disc assembly and a cutting tool. The rotary disc assembly is made up of an outer ring board, a rotary disc, a fixing ring cap and a plurality of beads. The rotary disc mounted to the outer ring board is movably limited in place by the fixing ring cap and are rotatably supported by the multiple beads received in a tunnel defined between the outer ring board and the rotary disc. On the rotary disc are disposed a plurality of holes marked with a numeral that is the diameter of a circle to be cut. The cutting tool has a hollow pen stick and a cutting knife attached to a knife clip that is movably engaged with a holding head. The holding head is further secured to the bottom end of the hollow pen stick and is free to rotate with respect to the pen stick so that the cutting knife can be smoothly guided in a cutting operation.