Abstract: A circle cutting devices includes a pair of opposing discs rotatably coupled together about a common axis by a spindle extending axially from one of the discs. A spring biasing assembly is coupled to the spindle to bias the discs together by a constant pressure. A cutting tool and a pair of rollers are positioned on an inner face of one of the discs to engage and cut the material by rotating the disc.

Abstract: An oval mat cutter allows the continuous adjustment of the overall size of the oval as well as the difference between its larger and smaller axes. The cutter may also produce circles. The cutter separates the knife from a first point which it keeps in a first groove. It separates this first point from a second point which it keeps in a second groove lying perpendicular to the first. A generally circular motion of the cutter while maintaining the two points in their respective grooves creates the desired oval. Making the two points in their respective groove coincide with each other will result in the production of a circle. The knife that makes the actual cut sits next to a wheel whose outer circumference has a sharp ridge. The knife has configurations where it extends to various distances beyond the edge of the wheel and one in which it sits within the wheel's circumference. To make a clean cut, the wheel, with the knife retracted, makes a groove in the mat.

Abstract: A porous panel cutting and forming device and method is provided including a support and guide block with an "L" shaped guide slot into which a pivot guide pin is inserted depending downwardly from a radial arm with a knife blade depending from an end. The arm member is pushed or pulled along the slot to cut the straight edge and then rotated ninety degrees while the guide pin remains relatively stationary in the guide slot, followed by movement of the arm member along the straight section of the slot to finish the cut forming a top or bottom panel section of a ninety degree angle curved heating and air conditioning duct section. The back of the duct section to be attached to the curved portion of the corner is formed in a curved shape after cutting parallel slits one inch apart transverse across the panel at a forty-five degree angle to the surface.

Abstract: An adjustable size hole cutter for ostomy adhesive wafers is disclosed having firstly a cylindrical body adapted to hold a cutting blade, a cylindrical pilot protruding outward from the bottom circular face of the cylindrical body to reside in a preformed hole in the colostomy wafer, and a Tee handle protruding outward from the top face. Adjustment of the blade's distance from the center of the cylindrical body for cutting different sized holes is accomplished by means of removable adjustment spacers situated in a radial slot formed in the wall of the cylindrical body, the cutting blade secured to the outside adjustment spacer by a set screw passing through a hole in the blade and aligned holes in the adjustment spacers. A circular base plate with centrally located hole receives the pilot of the adjustable hole cutter. The ostomy wafer is placed between the bottom face of the cylindrical body and the base plate whereupon the blade cuts into the wafer and the circular hole cut as the cutter is rotated.

Abstract: A circle cutter having an elongate body is disclosed, the body having an awl perpendicularly affixed to one end and a crank handle affixed to the other. The crank handle stands out from the same face of the body as the awl's handle, and parallel to its axis. The awl's bit projects, coaxial with its handle, from the body's opposite face. A cutting block is disposed in a channel in the cutter's body and is variably positionable therealong. One embodiment of the cutter includes a slot in the channel through which the shank of a thumbscrew projects for tightening the cutting block into a fixed position. Another includes a detent ball in the cutting block, the ball being able to engage one of a regularly-spaced series of depressions in the channel's wall.

Abstract: A compass for sweeping an arc of a circle on a sheet of material comprises an annular base having a lower surface engageable with the material. A support member is rotatably supported on the base and a toolholder is mounted on the support member. The toolholder is moveable with the support and upon rotation of the support relative to the base, sweeps an arc of a circle. The toolholder has a toolpost to support a tool and permit movement of the tool relative to the support member in a direction generally normal to the sheet of material to facilitate movement of a tool mounted in the holder into and out of engagement with the sheet of material.

Abstract: An apparatus for cutting an interior opening in a sheet of material, such as an ostomy skin barrier, has a base with a flat cutting surface and a spindle extending out of the cutting surface. The spindle has a slot in its top which holds an arm having a cutting blade affixed thereto. The blade extends down to the cutting surface and remains stationary during cutting operations. Cutting is performed by rotating the sheet being cut about the spindle.

Abstract: An improved circle cutting tool for performing circular cuts on a wide variety of materials. Comprises a body (10) having a horizontal rotating radius bar (18) which is provided with an adjustable knife holder (20) and knife blade (30). The knife holder may be reversed for right or left handed users. The body is also provided with anchor pins (12) on the bottom and a swivel handle (38) on top.

Abstract: A cutting tool assembly including an elongated pilot holder and a cutter blade adapted to be transversely positioned in a transverse slot in the pilot holder. The cutter blade includes cutting edges along one transverse edge of the blade and notches in the upper and lower transverse edges of the blade for respective coaction with a set scrw received in a threaded central axial bore in the lower pilot end of the pilot holder. In use, the lower pilot portion of the pilot holder is positioned in a previously provided pilot hole in a plate member, and the pilot holder is lowered and simultaneously rotated to move the cutting edge of the cutter blade into the upper face of the plate member to perform a cutting operation in the upper face, whereafter the pilot holder and cutter blade are raised, the set screw is loosened to allow removal of the cutter blade from the pilot holder, the pilot holder is lowered to dispose the slot below the lower face of the plate member, the cutter blade is rotated through 180.degree.

Abstract: A standard cutting tool of the type commonly used to cut paperboard as a border for framing pictures or other objects is held in a two-piece clamp on the end of a curved arm. A first circular member on the other end of the arm has a surface which mates with a similar surface on a second circular member on the end of an elongated rod. The two circular members are placed in a desired rotational orientation and releasably held therein by a screw or other retaining means. One of two interchangeable, surface engaging, guide members is releasably retained at a desired position along the length of the rod, permitting the cutting tool to make either a circular or a straight cut in the paperboard with a beveled edge. The rotational adjustment of the two circular members permits the longitudinal axis of the blade to be aligned with the direction of blade movement when making circular cuts, thereby eliminating blade drag due to misalignment.

Abstract: A gasket cutting assembly for cutting an inner diameter and an outer diameter of a gasket simultaneously. The assembly has a rectangular bar base portion with a longitudinal slot therein and a blade at one end. An L-shaped adapter arm with a second blade at the L-shaped end also has a longitudinal slot and the arm and base are attached to one another by a bolt through the longitudinal slots. Graduations on the base and arm facilitate settings of the blades for cutting the internal and outside diameters of a gasket simultaneously.

Abstract: The portable washer cutter of this invention comprises a pair of enclosures adapted to be interconnected and operative to rotate to progressively close the two enclosures together. A cutting knife edge secured in one enclosure progressively engages with each rotation a flat washer blank supported in the other enclosure to produce a desired central cut-out from the washer blank.

Abstract: A shaping or cutting device for accurately and incrementally shaping the arcuate edges of the teeth of packing segments used as seals between turbine stage diaphragms. The device assures that the reshaped packing teeth provide uniform clearance by the seals between stage diaphragms thereby maintaining efficiency between the higher to lower pressure stages of the turbine. The device includes a positioning jig to hold the packing segments. A pivoting cutting tool is itself vertically and horizontally positionable relative to the jig. By relatively positioning the jig and cutting tool, cutting can be incrementally adjusted to uniformly shape each arcuate edge of packing teeth.

Abstract: The rotary cutting tool is used for making holes in walls of thermoplastic materials, e.g. fuel tanks produced by the blowing process. Cutting blades pointing roughly in the axial direction are placed on the free end face of a circular, rotary tool member and said cutting blade score and displace, instead of cutting the material. The cutting blades are arranged at a drawing angle to the axial direction and slope to the inside or outside, depending on whether a burr is or is not required on the opening edge. A holding device in the form of a mandrel or pin ensures that the cut out circular disk does not drop into the container. Thus, a cut is made, which is suitable for further processing by welding on connections or fitting seals and produces no chips and waste which could fall into the container.

Abstract: A guide device for a tool such as a manual planing machine or a manual milling machine comprises a compass point connected to the tool by several guide rods. Curving or circular working processes are possible with this guide device. The compass point is preferably supported in a connecting piece connected to the guide rods, with the guide rods passing through the housing of the working tool. A sliding block additionally arranged on the guide rods carries the weight of the working tool and assures a constant, uniform working depth. When processing edges, the guide rods connected with the working tool may be mounted on an angle piece, which by means of further rods is connected with the connecting piece carrying the compass point.

Abstract: An elongated upstanding shank is provided including structure for manually applying rotary torque to the upper end of the shank. The lower end of the shank supports an elongated blade therefrom including a first horizontal upper end mounted at one end of the shank above the lower terminal end thereof for rotation with the shank. The first horizontal upper end of the blade extends outwardly from one side of the shank and terminates in a downwardly and inwardly curving portion which in turn terminates in a downwardly and inwardly inclined lower end portion of the blade. The downwardly and inwardly curving blade portion is slightly twisted about its longitudinal axis to position the lower terminal end of the blade lower end portion slightly outwardly of a second side of the shank facing outwardly in a direction disposed substantially 90.degree. from the direction in which the first side of the shank faces outwardly.

Abstract: A circular sawblade useful in cutting circular figures from a planar material utilizing a power source to rotate the sawblade where the blade has a selected degree of concativity to accommodate the radius of the circular figure to be cut from the planar material. The present invention further comprehends a saw device to mount the blade for rotation where the cutting plane of the material can be selectively adjusted with respect to the degree of concativity of the sawblade to selectively adjust the angle between the surface cut by the blade and the planar surface of the material.

Abstract: A circular cutter 10 has a drive shaft 11 that turns a beam 30 bearing one or two cutter knives 50 rotated within a drum 20 mounted on shaft 11 to surround beam 30. A pressure shoe 25 on the bottom of drum 20 has a central opening 26 within which cutter knives 50 can turn, and drum 20 is biased downward relative to shaft 11 and beam 30 so that pressure shoe 25 engages and holds a work piece 60 as it is cut. Pressure shoe 25 is preferably interchangeable to afford different sizes of central openings 26 for different radii of cuts, knives 50 are preferably radially adjustable along beam 30, and drum 20 is preferably transparent to serve as a guard that the user can see through.

Abstract: A portable adjustable washer cutter and improved sealing washer blank useful in telecommunications applications are described. The cutter comprises an essentially flat frame carrying a rotatable shaft and a platform placed opposite thereto for mounting a sealing washer blank in which a desired central opening is to be cut. An improved sealing washer blank having a small central opening and a small opening along its periphery can be easily mounted on the cutter by insertion of protruding members on the cutter through these openings. The sealing washer blank is cut by means of a blade mounted on a member attached to the bottom of the shaft. In a preferred embodiment, the sealing washer blank is provided with concentric annular ribs, the sealing washer blank being cut at a position between ribs.

Abstract: A rotary cutter for cutting holes of various sizes in sheet material such as self-adhesive pads. The cutter includes a base to which a cover is pivotally mounted for movement between a lowered closed position where it overlies the base and a raised open position. The cover has upstanding side walls defining a cavity between the roof of the cover and the upper surface of the base. A blade carried by a blade arm rotates within the cavity for cutting holes in sheet material carried on the base. The blade arm is adjustably secured to one end of a shaft extending into the cavity which is journaled in a bearing sleeve in the roof of the cover permitting rotary as well as axial movement permitting the blade to be pressed downwardly to the sheet material during rotary cutting operations. A crank arm is mounted to the other end of the rotor shaft for imparting rotary motion to the blade arm.

Abstract: A glass cutter and an accessory to allow circular cuts are disclosed. The glass cutter includes a barrel having an axial opening formed of two sections: a smooth and a tapped section, a tapered holder for releasably securing a cutter wheel in the barrel's smooth section, and a spring-biased shaft to be secured within the tapped section and provided with a finger control member. Preferably, the shaft is axiably adjustable. Preferably, the barrel has a knurled outer periphery. Preferably, the holder is formed of stainless steel and the remaining parts are of aluminum.

Abstract: An apparatus for semiautomatically sticking an adhesive film on a silicon wafer and on a ring used as a carrier. After the ring and the silicon wafer have been manually positioned on tables, an adhesive film is automatically stuck on the ring and the silicon wafer. The excess portion of the film is then cut by hand along the ring and transversely. The apparatus greatly facilitates these works.

Abstract: An elongated upstanding shank is provided including a ground piercing lower end and an upper end including structure for applying rotary torque to the shank. The lower end portion of the shank supports a generally horizontally disposed U-shaped blade therefrom including a pair of generally parallel upper and lower arms joined at one pair of corresponding ends by an integral curved bight portion. The other pair of corresponding ends of the arms are supported from the shank at points spaced therealong. At least the lower arm and the adjacent portion of the bight portion include a sharpened edge facing outwardly of one side of an upstanding plane containing the U-shaped blade and the shank. The blade comprises a thick elongated strap metal member bent into U-shaped configuration and the portions of the blade defining the lower arm and the adjacent portion of the bight portion are disposed with their width extents disposed generally normal to the aforementioned plane.

Abstract: A device for cutting discs of paper of either a diameter of 21/4" to 23/4" with means to adjust the depth of the cutter blade all contained in a circular, stationary container and incorporating means to rotate the cutter blade.

Abstract: A guiding arrangement for a hand saw includes a support located below the saw housing, a guiding strip adjustably connected to the support and a guiding rail secured to the guiding strip. The guiding rail extends normal to the guiding strip and serves as a guide for a saw when the blade of the latter makes straight parallel cuts. The guiding rail has at least one projection formed with two openings for selectively receiving a centering pin utilized in operation when the saw blade makes circular cuts.

Abstract: A device for cutting vegetables into interconnected slices of generally helical configuration. The device comprises a cutting device including feed screw and an elongate cutting edge extending outwardly from the feed screw in direction normal to the axis of the feed screw. The feed screw has an axial opening to receive a skewer upon which a vegetable to be cut is mounted. The cutting device is then mounted on the skewer and is rotated advancing the cutting device into the vegetable to move the slicing device along the skewer and moves the cutting edge through the vegetable in a helical cutting path.

Abstract: A machine tool for scribing arcs and circles on work pieces comprising an elongated arm having a vertical stud adjacent one end for mounting in a chuck on a rotary spindle, a slide having a plurality of scribing styluses of different sizes disposed at an angle to each other and extending perpendicularly from the outer surface, the slide being movable along the arm to dispose the styluses selectively at desired precise distances from the stud and the slide also being rotatable on the arm to position one of the styluses in parallelism with the stud, a clamping thumb screw threaded into the slide for engagement with the arm to releasably secure the slide to arm at a selected position thereon, slide having a notch extending into the face nearest stud and adapted to receive the same when very small radii are desired, and a fixed reference flange on the stud end of arm positioned outwardly from the axis of stud a distance equal to the distance between the axis of the stylus on slide and the face of the slide neares

Abstract: A cutter employing flat replaceable blades and providing a handle and support member that is shaped as an annular segment cut off by a planar surface. The blade is held by a shaft which is preferably encircled by a sleeve and locked to it against rotation. The shaft alone or both the shaft and sleeve extend through a horizontal opening parallel to the planar surface and are locked in place at any desired rotational position. The shaft provides a blade-holding channel enabling ready adjustment of the cutting depth of the blade. In addition to straight cuts and freehand cuts, the latter may be used for circular cuts by attaching a radius rod to it. Cuts of limited length can be simplified by use of another attachment. A further attachment is used to make cuts parallel to the edge of the mounting board.

Abstract: A combination carpet razor knife and guide. In known carpet razor knives, a screw retains a razor in sandwiched relation to the opposed halves of the carpet razor knife body. In the invention, this screw is utilized to fixedly secure an arm to the knife, at right angles thereto, the arm being adapted to secure a depending guide in a plurality of functional positions of horizontal adjustment relative to the razor. The novel guide produces a new method for making a substantially perfect seam between abutting carpets.

Abstract: A cutter for cutting out profiles from sheet material, the cutter having a cutter blade mounted on a pivoted arm whose movement round a fulcrum causes variation in the effective length of the arm by means of a cam and cam follower combination.

Abstract: The cutter is primarily intended for use in cutting holes of various sizes in self-adhesive pads used by people who have had Ilyostomy and collostomy operations. It consists of a holder in the form of a hinged case for a square pad, a rotatable blade carrier, and a blade adjustably carried in a radial slot in the blade carrier. The blade carrier is formed in two parts having a snap engagement with each other, and the arrangement is such that on release of the two parts from each other all of the components may be separated for cleaning.

Abstract: A cutter for cutting a sheet-like material into a circular form, comprising a frame member including a sidewall portion for holding a sheet-like material to be cut against a surface of a flat body and defining a gap between the portion and the surface, a rotary member pivotally mounted on the frame member and capable of rotation within the gap, a handle for driving the handle, and a knife mounted on the rotary member and having a cutting edge which at least extends to the surface of the flat body.

Abstract: Apparatus for cutting pieces of insulation used to line specially-shaped ductwork, such as radius elbows and O. G. sets. A pair of telescoping trammel tubes are pivotal about a pivot post, and radially movable with respect to the post to assume any desired, graduated, relative position. A cutter wheel is disposed on the end of each of the trammel tubes, and the cutter wheels may be movable from one position wherein they are in line with the trammel tubes, and thus can make a radial cut, to a second position wherein they are disposed substantially 90.degree. with respect to the trammel tubes, and thus can make an arcuate cut with the pivot post generally at the center of the arc. The tubes can be manipulated with respect to the pivot post and with respect to each other, and the cutter wheels may be manipulated with respect to the tubes, so that both radial and true arcuate cuts can be made in insulation to produce an insulation piece of the desired dimensions quickly and accurately.

Abstract: A circular cutting device having a stand which rests upon the workpiece with its own weight and via an adhesive layer disposed on the bottom of the stand. A sleeve in the stand threadedly receives a hollow pivot shaft in which a centering pin is axially displaceable against the force of a spring. A radial arm carries the tool and is fixed to a bush rotatably guided on the shaft.

Abstract: A repair tool for performing quick, inexpensive and almost invisible repairs on fabrics which have been subjected to local damage. The tool comprises a base plate having core pins and ring pins projecting upwardly therefrom. An annular holding ring overfits the base plate and sandwiches the fabric to be repaired therebetween. A rotary knob including a circular razor turns within the holding ring central opening to cut a perfect circular hole in the fabric to remove the damaged area. The tool is utilized to cut a similar circular patch from an undamaged portion of the fabric. The patch is then applied to the circular hole in the damaged fabric and is secured thereto by rearwardly positioned adhesive faced material to provide an almost invisible repair.

Abstract: A mat cutter substantially according to U.S. Pat. No. 2,924,010 dated Feb. 6, 1960, with the addition of a vertical radius bar having an adjustable center point, and means for attaching the bar to the mat cutter body with the point of the cutting blade substantially in line with the center point about which the mat cutter pivots, to cut generally exact circles. The mechanism holding the blade to the mat cutter body is utilized to secure the vertical radius rod in position.

Abstract: A cutting apparatus for making circular or circular arc-like cuts in a sheet of material such as paper, cloth, leather, plastic, rubber and the like. A substantially planar base is provided to receivably support said sheet and a hinged apertured clamping plate is lowered over the supported sheet to secure it against movement during the cutting operation which takes place through the aperture. An arcuate arm is secured to the base and an elongated portion of the arm positions an internally-threaded vertically-oriented boss above the aperture. An externally-threaded member is operably received within the boss and includes an adjustment disc for turning said member to raise or lower same within said boss. A blade-positioning shaft is received within a vertically-oriented central bore in the member and includes a shoulder to secure the shaft for vertical movement with the member. The lower distal end of the shaft includes a threaded pin for being slideably received within a radius selecting slot of the blade.

Abstract: Accumulated deposits are removed from the face of a spinneret by periodically manually wiping the face of the spinneret with the blade of a hand held wipe stick. Cooling the blade just before use decreases the smearing of the polymer melt and increases the wipe cycle. Dry ice is the preferred cooling medium.

Abstract: A grass-clearing device for lawn sprinkler heads, wherein the grass and sod surrounding the in-line, sprinkler head is to be trimmed therefrom, to provide an unobstructed flow of water from the sprinkler head. The device comprises a pair of adjustable, cutting blades slidably secured to a support body, the blades being provided with a centering mechanism whereby the blades can be adjusted for proper cutting relative to the size of the sprinkler head. A telescoping, handle shaft is secured to the support body, the upper end of the handle including a foldable, hand grip connected thereto.

Abstract: Disclosed is a device for cutting circles and the like consisting essentially of an adapter for mounting on one leg of a compass and into which is threaded a blade holder provided with a blade.