Abstract: A device for activating a saber saw from a hand drill is provided and consists of a stationary base member for the hand drill to be attached to with an elongated flexible operating cable extending from the chuck of the hand drill to a drive mechanism within the housing of the saber saw which converts rotary motion from the motor of the hand drill to reciprocating motion to the saber saw.

Abstract: In connection with a conversion set for a portable circular saw, which latter comprises a housing, an associated electric drive motor with output shaft and, if necessary, also a gear, and at least one handle, it is proposed to attach to the basic unit remaining after removal of the circular saw blade a chain-saw adapter attachment, to convert the portable circular saw in this manner into an electric chain saw and to secure the chain-saw adapter attachment in place by means of mechanical stops provided on a main bearing plate and coacting with the gear housing of the circular saw and, in the axial direction, by tightening a screw upon the output shaft of the circular saw projecting through the drive pinion for the saw chain.

Abstract: A power-driven saw is disclosed having a readily-detachable, integrated endless-belt cutting assembly unit. The saw includes a power unit having a housing, and further includes a cutting assembly unit which can be mounted on the power unit, and detached therefrom, as a unit. The integrated cutting assembly unit includes a generally plate-like cutting element support, and an endless-belt cutting element (e.g., a saw chain articulated blade, or the like) which extends generally about the periphery of the support for high speed cutting movement thereabout. The integrated cutting assembly unit further includes means for driving the endless-belt cutting element, with the drive means being operatively-coupled with the motor of the power unit of the saw when the integrated cutting assembly unit is mounted to the power unit.

Abstract: The invention provides a specialty tool useful for cleaning out broken off or cut off plastic pipe and glue in plastic fittings and plastic couplers. An arbor for use with a manual or electrical operated drill is provided with a smooth portion and a threaded portion. The threaded portion terminates in a screw head. Positioned on the arbor adjacent the screw head is an internal guide disc sized to fit inside the broken off or cut off plastic pipe to be removed from the plastic fitting or coupler. A circular cutting head having sharpened protrusions along the circumference is positioned next to the internal guide disc. A retaining nut slipped down over the smooth arbor shaft is tightened down against the circular cutter and retains both the cutter and the internal guide disc firmly on the arbor shaft. The assembled device is useful for the removal of broken off or cut off plastic pipe remaining in an otherwise useable plastic fitting or coupling.

Abstract: An adapter having particular application to quickly and easily convert a portable worm driven circular power saw into a sprocket driven chain saw. The adapter comprises an adjustable compression ring portion which is adapted to be attached to the existing bearing plate of the circular saw without requiring a removal of the bearing plate. Coextensively formed with the adapter compression ring portion is a base portion having a structure which permits a cutting chain bar and a cutting chain safety guard to be connected to opposite faces of the base portion. Thus, a circular cutting blade may be replaced by a cutting chain, and vice versa, without removing the existing bearing plate, as is commonly required when a conventional converison apparatus is utilized.

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 protective safety cover for a power transmission chain of a chain saw power head and an attachment for the power head, having at least two fins for engagement by the cover, is provided with two grooves adapted to frictionally engage the fins to secure the cover to the attachment. The grooves are curved until the fins are located therein so that upon location of the fins in the grooves the cover is resiliently deformed to correspond to the shape of the fins thereby enhancing the frictional engagement between the fins and grooves.

Abstract: A portable, hand held electric arc saw has a small frame for supporting an electrically conducting rotary blade which serves as an electrode for generating an electric arc to erode a workpiece. Electric current is supplied to the blade by biased brushes and a slip ring which are mounted in the frame. A pair of freely movable endless belts in the form of crawler treads stretched between two pulleys are used to facilitate movement of the electric arc saw. The pulleys are formed of dielectric material to electrically insulate the crawler treads from the frame.

Abstract: A generally cup shaped cutting head for fitting over and around the sprinker head includes a generally circular cutting edge for cutting around a sprinkler head, and a cleaning brush mounted concentrically within the cutting head and recessed from the cutting edge for engaging and cleaning the surface of a sprinkler head, with the cutting head detachably mounted on the end of an elongated drive shaft which is adapted to be driven by an electric drill motor or the like.

Abstract: A shearing machine for shearing sheet material, comprises a body (1) and to co-operating shearing wheels (5, 6) between whose shearing edges (41, 42) the sheet is cut. The stand (1) comprises a first part (2) and a second part (3), which are laterally offset from one another, and an intermediate horizontal connecting part (4). The shearing wheels (5, 6) are axially offset from one another and have their shearing edges (41, 42) in tangential contact with one another. The intermediate horizontal stand part (4) forms a wedge-shaped deflector and has its leading edge (27) disposed in line with and at a distance from the nip (28) between the shearing wheels (5, 6). The shearing machine is free from structural elements on either side of the shearing wheels (5, 6), thus enabling sheet of any width to be cut.

Abstract: A razor blade holder includes a base plate and a top jaw. A cylindrical sleeve is attached to the base plate by two loops on the back of the base plate going under the cylindrical sleeve and one loop on the back of the plate over the cylindrical sleeve. A holding screw extends through a hole in the top jaw into a tapped hole in the base plate. The top jaw is curved from the front to the back so that tightening the holding screw will tightly hold the razor blade located between the base plate and the top jaw. A set screw radially in the sleeve secures the sleeve to the engraving point of a vibrating engraver. Therefore, operation of the engraver will vibrate the blade to aid in the scraping action.

Abstract: Driven and idle sprocket wheels are journaled in aligned relation for rotation about spaced apart parallel axes and a chain is trained over the sprocket wheels. The sprocket wheels are journaled from a support structure and the latter includes an elongated support member guidingly supported therefrom for rectilinear reciprocation along a path generally paralleling the reaches of the chain extending between the sprocket wheels.

Abstract: The machine includes a power-reciprocated blade adapted to be driven by a conventional electric drill and adapted to strip cemented carpet away from a floor. The blade and the handle grips of the machine are adapted to be shifted to laterally compact storage positions to facilitate carrying and storage of the machine.

Abstract: An attachment for a conventional portable electric drill, so as to serve for sanding wood, cutting grass or cutting wood; the attachment supporting either a frame having a pair of rollers around which an endless sanding belt is driven, the attachment otherwise supporting a base holding a rotatable circular saw blade, and the attachment still otherwise holding a frame having a rotatable shaft on which a grass cutting blade is mounted and enclosed under a protective shield.

Abstract: A generally portable sheet material cutting tool comprising apparatus having a substantially stationary sleeve member with a free end and a cutting tool reciprocable within the sleeve member, the cutting tool having both a transverse cutting edge formed along its length cooperable with the free end of the sleeve member and an initial hole forming means extending beyond the free end of the sleeve member. The reciprocation of the cutting tool is effected by cam means acting in response to rotary motion supplied by a hand held drill unit or by a rotary drive motor, the cam means being capable of being disengaged by axial pressure applied to the initial hole forming means. In one form of the apparatus the transverse cutting edge is given both a reciprocating and a rotating component of motion, and in a modified form of the apparatus the transverse cutting edge is restrained for reciprocating movement only.

Abstract: The present invention relates to a variable stroke, impact device comprising a rotating cam impeller which includes an elongated first end portion adaptable for attachment to a rotary drive source and further includes a curved cam surface formed on a second end portion. The rotating cam surface interacts with a curved end portion of an impact tool to reciprocate a wedge-shaped portion of the tool into contact with a work surface. The length of the stroke and the reciprocating speed as well as the impact force are directly related to the force exerted by the operator in pressing the impact device against the work surface.

Abstract: A portable, lightweight, reciprocating saw for topping trees and the like has a frame with a clamp for attaching the frame to a tree. The frame has a pair of interconnected sprockets, one attached through a shaft to a detachable, portable power drill, and the other attached at its periphery to a curved blade. As the second sprocket is rotated, the saw blade reciprocates. The reciprocating saw blade is held against a tree top or branch by means of a biased blade guide adapted to move along a guide rail disposed perpendicularly of the frame in one plane and of the tree in the other plane for essentially automated, non-manual operation of the saw.

Abstract: Apparatus and method employing the engine unit of a conventional chain saw to power an electrical generator. In a first embodiment, a generator is detachably mounted to the engine unit, with an endless belt drivingly connecting the two. A second embodiment includes an engine unit of the above-described type operatively connected to a vehicle-mounted alternator.

Abstract: A grass cutting attachment for an electrically powered handyman's drill is disclosed. A length of flexible filament extends radially from a body rotatable by the drill. The rotating filament end is able to cut both edges of lawn and expanses of lawn. A handle attachment which prevents stooping and bending by an operator is also disclosed.

Abstract: There is disclosed an attachment for a counter-rotating coaxial drive fastener gun having a cylindrical housing adapted to be threadably attached to the outer drive member of a coaxial drive fastener gun and having an inner cavity with a ring gear fixedly attached therein. A spider has a projecting end thereon adapted to engage the inner drive of the coaxial drive fastener gun and further has a plurality of planetary gears journaled therearound and is inserted into the inner cavity of the cylindrical housing with the planetary gears engaging the ring gear. A central drive gear of smaller diameter than the planetary gears is inserted into a central opening between the planetary gears and engages each of the planetary gears. A reamer is removably coupled to the central drive gear and rotated thereby.

Abstract: Disclosed herein are rotary cutting assemblies for cutting growing vegetation with tough whirling filament. The assemblies generally comprise an elongate lineal shaft extending along a vertical-axis, the longitudinal shaft having a top-end for removable insertion into a portable manually-graspable powered chuck; a horizontal disc-like base-plate in co-rotatable association with the shaft lower portion; a convolutely coiled supply of filament surrounding the shaft vertical-axis; axial confinement means for confining the stored filament toward the base-plate; retainer means attached to the base-plate for removably securing successive leadward portions of the wearable cutting filament adjacent the base-plate peripheral-edge; and gravimetric balancing means for the rapidly rotating lower head portion of the assembly comprising base-plate and environs.

Abstract: A large dimension beam cutting, detailing and mitering attachment for removable connection to the base plate of a portable circular power saw, wherein the cutting blade has been removed therefrom, and which includes a flat base attachment plate having a flat cutter bar and endless saw chain arranged thereon, with the bar fixedly attached thereto and depending at right angles therefrom. A sprocket associated with the saw chain is mounted on the drive shaft of the saw and the base attachment plate flatly receives and has means for attaching the cicular saw base plate thereto so that beams may be smoothly cut or mitered when the attachment plate is flatly disposed thereon and moved thereover. This enables the saw chain to be used in the same manner as a circular saw.

Abstract: A tree cutting attachment for connection to a power mower or the like, and including an adapter means for mounting on the frame of the mower, and a cutting assembly including an elongated support arm connected to the adapter means and projecting outwardly from the side of the mower frame for engagement with a tree or the like. A continuous cutting element is movably mounted on a support arm for cutting engagement with the tree, and a drive assembly is operably connected to the cutting element being adapted for connection to the drive shaft of the power mower to impart movement to the cutting element for cutting through the tree.

Abstract: A chain saw drive having a unitary quick-attach, quick-detach grasscutting adapter including a cutter head driven by a flexible cable coupled with the output of the chain saw drive by a complementary fitting and supported inside a tubular member clamped to the chainsaw frame and extending in a downward arc toward the ground; bearings and spacers sequentially assembled into the tubular member-journal the flexible cable; the upper end of the tubular member has an integral clamp detachably affixed to the chain saw frame at attachment points customarily supplied with portable chain saw frames; a relatively long handle extending rearwardly of the frame on one end and a loop handle integral with the chainsaw drive on the other end provide manual grips for the assembly, which preferably is supplied with a filament-type cutter head for safety but which can be used with other cutting heads; a support at the cutter head is also disclosed.

Abstract: A portable hand-held power device having a slotted entryway for sheet material to be cut; a tool mounted for reciprocation across such entryway and formed with an offset shoulder having a cutting edge movable to and from one side of the entryway, acting as a support for the material to be cut, for impacting a sheet against such side and shearing successive sections of material therefrom as the sheet is advanced through the entryway.