Abstract: A cutter employing flat replaceable blades in a support member that is shaped as a cube having indentations in its sides to facilitate grasping. The cube is divided into two sides which are held together by adjustable securing means. The blade is inserted in a receiving slot, a plurality of such slots preferably being disposed through the mid-section of the cube at several different angles with respect to the surfaces to be cut. The blade is held in place by positioning it in the slot which corresponds to the desired cutting angle, inserting it to the desired cutting depth and then tightening the adjustable securing means. The cutter is adapted to being guided by a straightedge or to being used for making freehand cuts. The bottom surface of the cutter is shaped to avoid tearing the surface of the mounting board being cut.

Abstract: Surgical apparatus for use in guiding and aligning a surgical blade or osteotome for bone removal from the tibia and femur during a proximal tibia osteotomy or a total knee replacement operation is disclosed. The apparatus includes a femur "T" bar unit and a tibia "T" bar unit which are connected to the shaft of the femur and tibia bones respectively. First and second guide members provide means such that desired or selected cutting planes can be maintained during the bone cutting operation. These guides may be selectively attached to the mid portion of the T-bar units for providing a guide for total knee replacement or to the lateral or medial ends of the "T"-bar for a proximal tibia osteotomy. The medial and lateral ends of the cross bars of the T-bar units are secured to each other by means which are selected according to the operation to be performed. That is, a selection is made depending on whether the operation is to be a proximal tibia osteotomy or a total knee replacement.

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 knife of a pencil type includes a barrel or outer member in which a slidably carried support or inner member is connected in an end-to-end relation with a blade assembly for movement of the blade assembly to extended and retracted positions relative to one end of the barrel member. The blade assembly includes tension fingers that extend from a lower portion of the blade assembly periphery to engage the barrel member and bias such member in an upward direction thereby preventing side-to-side play of the blade assembly in the barrel member and to inhibit upward movement of the blade assembly therein. The blade assembly is also formed with a slight bow to urge the upper portion of the blade assembly against the barrel member and thereby prevent undesired upward movement of the blade assembly when a cutting operation is performed.

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 handy safety knife comprises a generally flat holder having a chamber and an opening both defined therein, an elongated blade member, a manipulatable member carried by the holder for movement between projected and retracted position and operatively coupled to the blade member, a spring element for biasing the manipulatable member to the retracted position to hold the blade member in position to be concealed within the chamber, and, if desired, a wedge member for retaining the manipulatable member in the projected position once it has been moved thereto.

Abstract: A cutter employing flat replaceable blades and providing a handle and support memeber 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: An attachment for a utility knife is disclosed which allows the knife to be used in association with a measuring tape for cutting sheets of plasterboard and the like into uniform widths. In one embodiment, the attachment is in the form of a relatively thin metal plate which is fitted into the handle of the knife alongside the blade and which has a projecting flange at its outer end formed with a slot for receiving a measuring tape.

Abstract: A burn-in knife for furniture repair has an electrically heated blade and is provided with an adjustable edge guide assembly mounted on the knife handle for supporting the knife on a workpiece and maintaining the working edge of the blade at a predetermined distance from the workpiece. The guide assembly includes a heat-insulative guide means arranged in side-by-side relationship to the working edge of the blade and out of the working path thereof. The guide means lies in the same plane as the blade and has a straight edge adapted to engage the workpiece. The guide means is selectively adjustable both vertically and rotationally relative to the working edge of the blade.

Abstract: A picture frame mat opening cutter is adapted for cutting both circles and ovals and depth of cut can be controlled by the amount of downward pressure applied during use. The cutter body mounts a retractable cable wound on a rotatable spool; a cutting blade mounted on a spring-loaded, slidable support bar; and a rotatable, vertically movable control knob which bears on the support bar and is manually grasped and manipulated for moving the cutter and controlling the depth of cut according to the amount of pressure applied to the knob. Beveled oval and circular picture frame mat openings are cut utilizing the retractable cable in conjunction with positioning pins on the surface of a mat to be cut. By modification, straight line cuts are also obtainable.

Abstract: A cutter to remove corneas from eyes which includes a body adapted to be placed and held on an eye and which has a rotatable carriage including a contact lens which rests against the surface of the cornea to restrict movement thereof and which has associated therewith a knife, the depth of cut of which is adjustable so that on a combination of rotation of the carriage and adjustment of depth of cut the cornea can be removed, the removed cornea having a truncated conical outer surface. The specification also describes a surgical method of removing and replacing corneas in eyes.

Abstract: An elongated tubular body of square cross section is provided and an endwise outwardly tapering nose is secured in one end of the tubular member. One longitudinal side of the tubular member includes a narrow closed ended slot formed therein and extending longitudinally therealong. The opposite longitudinal side of the tubular member has a wide longitudinal slot formed therein and the wide slot opens through the end of the tubular member remote from the nose. A support block is guidingly and slidingly received within the tubular member and a headed set screw is threadedly engaged in the support block and extends through the narrow groove. A V-shaped cutting blade is carried by the side of the support block adjacent the nose and is disposed in a plane transverse to the longitudinal center line of the tubular member and the apex of the cutting blade projects through the wide slot.

Abstract: A grooving tool has a support provided with a handle formed on its lower surface with a substantially flat sliding face and having a pair of generally parallel slots opening at this face and extending in a predetermined direction. A blade is secured in each of the two slots with portions of the blades extending beyond the face and the cutting edges of the blades forming a vertex in projection in the predetermined direction on a plane perpendicular to this direction. The parts of the support forming the lower surface can be displaceable relative to the blades to vary the spacing between the vertex and the surface for a different depth of cut. The tool can be drawn along a workpiece such as a board of insulating material so as to cut in it a very neat groove by excising a strip which may be of triangular section if the blades are planar or of semicircular section if the blades have curved lower ends.

Abstract: Tool guide for a knife-edged hand tool for use in the fabrication of an air duct transition from a sheet of fibrous material, said sheet having transversely extending folding grooves therein, for cutting from said panel a wedge-shaped piece of material of predetermined size.

Abstract: A versatile mat opening cutter is adapted for cutting circular and oval openings, rectangular openings and, with the aid of a template, special shaped openings. The cutter body mounts a retractable cable wound on a spring-loaded, rotatable spool, an adjustable cutting blade, and a template follower. Circles and ovals are cut utilizing the retractable cable and positioning pins on a working surface. Special shaped openings are cut by using a template and the template follower.

Abstract: A mat cutter employing a razor blade and providing protection against the blade's bending towards either of its sides. The cutter, used for preparing mats for photographs and other art objects, has a base upon which it sits and a section which slopes upward. A holder for a razor blade pivotally attaches to the sloping section and can rotate the blade into and out of a cutting position. When in its cutting position, the blade fits inside of a slot in the base and extends beyond only enough to effect the 45.degree. desired cut. The two sides of the slot prevent the blade from flexing towards either of its flat sides. With the blade thus surrounded and hidden from view, the cutter also employs a marking device that allows the proper placement of the cutter from a mat's edge to cut along a desired line. The cutter also includes starting and stopping marks so that it may produce a cut of the desired length using similar lines along the other sides of the mat.

Abstract: A carpet cutting tool having a body member formed by a pair of spaced, opposed leg portions connected together along an edge of each of the leg portions by a web arranged so that a sheet receiving slot is formed between the leg portions. Mounted on one of the leg portions of the body member for movement perpendicular to the web thereof is a handle assembly which supports a cutter assembly arranged so as to extend through an opening provided in the one of the leg portions and engage carpeting or other sheet material disposed between the leg portions. by pulling the tool relative to the material being cut, a strip of the material can be obtained for use as a baseboard covering, and the like.

Abstract: A lamination trimming device is disclosed for trimming excess laminating film along edges of a laminated card or sheet product. The trimming is performed such that a border of sealed laminating film remains along edges of the product. The device includes lower and upper guide members between which the laminating film is retained. A cutting blade is positioned above an upper guide member for trimming off the excess film and a deflecting surface is provided on a lower guide member for guiding the device along edges of the laminated product and for deflecting the excess laminated film to be trimmed. Both straight and curved surfaces may be trimmed with the device disclosed herein.

Abstract: A wall edge trimmer for resilient floor coverings comprising: a relatively smooth base surface capable of sliding along the surface of a resilient floor covering laid out on a floor; a relatively smooth front surface lying in a plane substantially at right angles to the plane containing the base surface and capable of sliding along the surface of a portion of the resilient floor covering which is curled upwardly and contacts the lower portion of a wall; a relatively smooth arcuate surface in the form of a quarter cylinder connecting the base surface and the front surface; and a cutting tool on the wall edge trimmer having a cutting edge intersecting the arcuate surface and extending from a point within the wall edge trimmer to a point beyond the arcuate surface, the base surface contacting the arcuate surface at a direct, level, straight-line distance from the vertical plane containing the front surface equal to the arcuate distance from the point of the intersection of the base surface and the arcuate surfac

Abstract: A wire stripper for removing the insulation from single-core or coaxial cable has a pair of elongated jaws which are hinged together at one end and are provided with a latch at the other end so that they can clamp the wire between them. One of the jaws carries a blade, preferably in a replaceable cartridge, adapted to penetrate into part of the periphery of the insulation of the wire while the other jaw is formed with a bed to receive the wire and hold it during penetration by the blade. One of the jaws is also provided with a ring or eye into which the user can insert a finger and thereby twirl the tool around to effect relative rotation of the tool and the wire to cut through the insulation over its entire circumference. The tool is then drawn off the wire axially or the wire is withdrawn axially from the tool to strip the severed length of insulation from the wire. When two axially spaced cuts are to be made, the replaceable cartridge is formed with two blades in parallel transversely spaced relation.

Abstract: A hand tool having a cutting blade to cut and form ends on decorative molding is provided with a movable guide for supporting the molding material at different positions with respect to the blade such that ends and insert pieces may be cut from the molding material to form decorative ends on strips of molding material applied to a receptor surface.

Abstract: A carpet trimmer comprising a base plate with slots directed at right angles to the working edge of the base plate. Underlying the base plate is a post holder with upstanding threaded posts protruding through the slots of the base plate. Overlying the base plate is a blade holder that engages the posts for movement with the post holder. Suitable nuts on the posts lock the post holder and the blade holder in an adjusted position relative to the base plate. A wall guide depends from the blade holder in spaced relation to the working edge of the base plate to define a passageway for a carpet edge to be trimmed by blades on the blade holder. When the nuts are loosened, the posts can be moved within the slots of the base plate toward or away from the working edge of the base plate. In so doing, the post holder and the blade holder move therewith. This action adjusts the distance between the working edge of the base plate and the wall guide to accommodate different thicknesses of carpets.

Abstract: A hand-held safety utility knife having an elongated shaped handle within which a replaceable cutting blade is securely retained, wherein the knife assembly is also provided with a compression-extension spiral spring loaded retractable blade guard that is mechanically cooperative with the cutting blade of the knife and manually activated for retraction by depressing a compression-extension spiral spring loaded trigger thereby enabling cutting utility of the blade in use application, and upon manual trigger release after use application provides non-use safety locking of the guard with respect to the utility knife cutting blade.

Abstract: Apparatus for removing the external bead formed when two polyethylene pipes are joined by thermal butt fusion. The apparatus comprises a frame having two arms, one of which is adapted at one end to slide on the other arm, and be maintained at an angle between the two of approximately 60.degree.. A sharp blade is attached to the first arm which presses against the surface of the pipe and the bead at a selected angle. The frame is placed against a pipe which fits into the 60.degree. V, with the two arms tangent to the pipe surface, the blade being at one point of tangency. While holding the frame in tight contact with the circumference of the pipe, the frame is rotated around the pipe so that the blade continually presses against the pipe at the root of the bead and removes the bead as a continuous strip. Various sizes of pipe can be handled by this device by sliding the second arm along the first arm closer to or further away from the blade, still maintaining the same 60.degree. angle between the two arms.

Abstract: A cable stripper having a handle, a removable sharp stripping blade therein, a cable guide including a tang mounted in the handle and secured therein with the blade by a single fastener, the cable guide comprising a laterally extended portion from the tang, said portion extending forwardly down and around the stripping blade in spaced relationship thereto. The guide then extends upwardly past the stripping blade, so that it avoids the necessity for the user's thumb to be placed on the cable near the stripping blade.

Abstract: A handtool for the application of sheet materials to surfaces, specifically the application of wall coverings to walls, is of obtuse angle triangle shape, with a knife blade at each base apex, the tip apex being rounded for folding the sheet into a corner and the edges adjacent the tip constituting guides for the respective knife blades. One blade may be circular and rotary with the guide edge tangential thereto, while the other blade is triangular with the guide edge colinear with the cutting edge. The circular blade may be toothed with a recessed cutting edge, while the triangular blade may be equilateral to provide six cutting edges by transposition and reversal. Two similar guides are provided on opposite sides of the body slidable in guideways between a retracted position and extended positions in which they lie alongside the knives to guide their cutting with respect to a surface engaged by the guide.

Abstract: A hand-held cutter for cutting sheet material, such as framing mats, which includes a body member of hemispheroidal shape, the diametral plane of which constitutes a flat bottom for moving over the sheet material. The body member has on the external surface thereof a pair of spaced-apart flat vertically oriented guiding surfaces between which are provided a pair of cutting blade-receiving slots, one disposed vertically and the other disposed at an angle with respect to the vertical. A cutting blade placed in either of the blade-receiving slots, after being adjusted to the desired cutting depth, is locked in position by a clamp which is actuated by a thumb-wheel which is largely contained within the body member.

Abstract: A hand-held cutting device is provided for opening cartons, such as cardboard boxes, without damaging the contents within the carton. The cutting device comprises a handle having an elongated flat bottom surface which is adapted to slide along the outer surface of the carton during a cutting operation. A cutting blade is secured to the handle and extends outwardly through an opening in the bottom surface of the handle for engaging and cutting the carton. A guard is secured to the cutting blade across its outwardly extending end and includes a portion extending forwardly of the cutting edge of the cutting blade. This forward portion of the guard is curved towards the handle and serves to deflect the contents of the carton away from the cutting blade during a cutting operation. Preferably the upper front edge of the guard forms a second cutting edge so that the guard easily pierces the carton during the initiation of a cutting operation.

Abstract: A hand-held wallpaper trimming tool symmetrically adapted for either left-handed or right-handed use which facilitates accurate and precise cutting of wallpaper along a joint between a wall being papered and an adjacent structural member. A guide portion is provided with a body member having a conically-shaped portion for resting against the adjacent structural member and gradually feeding the wallpaper into the joint, and with a pair of flat flanges for left-handed or right-handed use of the trimmer, alternatively, each attached at one edge thereof tangentially to the conical portion of the body member for placement against a wall being papered and pressing the paper smoothly against that wall. A selectably extensible cutting blade disposed at the apex end of the body member is mounted in a blade holder and secured by a releasable fastener. The blade holder may be rotated for orientation of the blade at a plurality of angles to the flanges with its cutting edge facing toward one or both of the flanges.

Abstract: A hand-held wallpaper trimming tool which facilitates accurate and precise cutting of wallpaper along a joint between a wall being papered and an adjacent structural member. A guide portion is provided with a conical body member for resting against the adjacent structural member and gradually feeding the wallpaper into the joint, and with a flat flange attached at one edge tangentially to the body member for placement against the wall being papered and pressing the paper smoothly against that wall. A selectably extensible cutting blade, such as a single-edge injector razor blade, is mounted in a receptacle at the apex end of the body member and secured by a releasable fastener. The blade is oriented at an angle to the flange with its cutting edge facing in the direction of the plane of the flange. An elongate handle, projecting away from the body member and away from the flange is mounted at the base end of the body member for manipulating the device.

Abstract: Routing apparatus comprising a frame which at one end is connected, or adapted for connection, with electric motor drive means. The frame at its other end has an arm which provides a location for a bearing defining with the drive means the axis of rotation of a shaft having a routing cutter thereon. The arm has side faces which lie in respective planes which extend parallel to the axis of rotation and have an included angle of 90.degree. or less, and at least that part of the frame adjacent the arm and the routing cutter is confined between the respective planes.

Abstract: The mat cutting apparatus includes a cutter for making a bevel cut and an adjustable edge guide having a vertical straight edge surface with which a vertical flat surface on the cutter is slidably engaged as the cutter is pushed along the edge guide to make a straight, beveled cut parallel to one edge of the mat. When used to cut an opening in a mat for mounting pictures or the like, the outline of the picture is traced on the back of the mat parallel to the edges thereof and then the mat is secured face down on the edge guide with the straight edge surface positioned adjacent and parallel to one traced line. The cut is made from the back surface of the mat such that the cut through the front mat surface registers with the traced line on the back mat surface. The mat is turned, the edge guide repositoined and the cutting process repeated until the mat opening is cut out completely.

Abstract: A cutter implement for cutting cardboard such as those used for opening cardboard boxes and including a guide member for guiding the implement along the box edge and wherein the cutter blade can be adjusted to extend at an angle to the guide member so as to cut into the corner of the box and not damage any of the contents of the box.

Abstract: This invention relates to a manual surgical knife. An elongated knife blade and an elongated blade guide are rigidly and releasably clamped in spaced apart relation. The blade guide has a guide surface which overlies and has a transverse dimension substantially greater than the blade transverse dimension. The blade guide has a flat planar guide surface which faces and is spaced from the surface of the knife blade. A guide shank is affixed to and longitudinally extends from the guide. A handle is attached to the guide shank and is laterally offset from the guide surface and inclined in a direction away from the guide surface thereby defining a hand clearance. The guide has edge-supporting ribs extending generally orthogonally from the guide in a direction opposite to the guide surface.

Abstract: A carpet cutter is disclosed which is used to cut any excess edges of a carpet to the size of a room after it has been laid in the room. The carpet is cut at its bend toward the wall. It includes a bed plate slid on the carpet, a guide plate at front of the bed plate to be pressed against the wall, a slanting blade mounting plate in the rear of the guide plate, a pair of blades mounted on the blade mounting plate, and a pair of presser rollers disposed outside of the blades for pressing down the carpet against the floor just before cutting. The carpet is cut by one blade slantly mounted so as for its edge to butt on the wall surface. The clamping nuts for the blades are tightened in reverse direction to each other. Therefore, there is no fear of the blade coming loose by contact with the carpet during cutting. The position of the presser rollers can be adjusted by means of one adjusting mechanism provided in the center according to the thickness of the carpet.

Abstract: A carpeting trimmer which includes a body consisting of a base having a flat bottom and upwardly extending grip, a channel extending through the body and slidably accommmodating a blade, a base plate mounted below the base of the body, and a disc having a screw threaded in the bottom of the base. The base plate is movable towards and away from the bottom of the base in such a manner that the front edge of the base plate retreats behind the front edge of the base. The disc is arranged between the bottom of the base and the base plate for supporting the latter.

Abstract: A tool for scraping an edge of a flat article, the tool comprising a first flat surface defining a first plane, a second flat surface defining a second plane at right angles to the first plane, and a cutting blade mounted at or near one end of the second flat surface, the plane of the blade being perpendicular to both the first plane and the second plane.

Abstract: An electric knife has two mutually reciprocating cutting blades and an adjustably spaced guide blade. The guide blade is mounted on a cylindrical cap that slidably encloses a cylindrical sleeve fixed to the knife handle, and is rotatable about an axis defined by a threaded rod perpendicular to the planes of the blades and coaxial with the cap and sleeve. A knurled nut on the threaded rod holds the cylindrical cap against a coil compression spring which also acts as a torsion spring urging the guide blade downwardly relative to the cutting blades against an abutment that also serves as a gauge for the thickness of the slices to be cut, manipulation of this knurled nut effecting this adjustment.

Abstract: A tool is provided for use primarily by professional carpet installers to trim an even strip of carpet around the boundary of a pad or pre-laid carpet prior to the installation of new wall-to-wall carpeting. The tool includes a body portion having an angularly adjustable handle and carrying a pair of cutters mounted to the front wall thereof and projecting downwardly to cut a rug or a pad when the body portion is moved over the top surface of a carpet or pad. The body portion is mounted on rollers and is also provided with an adjustable guide which slides against the wall or baseboard to control the width of the cut being made.

Abstract: A carpet cutter for cutting a carpet at the time of spreading it in a room. The carpet cutter in this invention makes it possible to finish the carpet so as to just fit in the room precisely without causing any damage on the floor, wall and the like. This carpet cutter comprises a base plate, a grip for gripping the tool firmly in hand, a guide plate for enabling the tool to move straight along the wall in a carpet cutting movement, said guide plate at a side opposite to the wall facing side having a mechanism for firmly setting a blade therein, and a wheel member incorporated in said tool playing the role of pressing down the carpet at the vicinity of the cutting portion thereby, making it possible to adjust the length or width of the carpet so as to make it fit in a room where it is spread by predeterminedly adjusting the vertical position of said wheel member with the use of a graduation marked beside it.