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

Abstract: A device for securing and tensioning a band saw blade, including a rectangular base member having a longitudinal axis, and a disk member fixedly attached at one end of the base member, the disk member holding a first end of the band saw blade in place. A first pair of parallel blade guides is disposed parallel to the longitudinal axis of the base member for supporting a section of the band saw blade therebetween. A retractable tensioning mechanism is disposed at the other end of the base member, which produces an outwardly directed force on a second end of the band saw blade.

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

Abstract: A portable chain saw sharpening kit comprises a sharpener body in the form of an inverted U-shaped channel-defining member adapted to be placed over the bar of a chain saw, a rotary burr with a tapered abradant end portion which is receivable in a selected one of two horizontal guide bores provided in the sharpener body, and an alignment pin which is likewise receivable in a selected one of the two guide bores. The alignment pin comprises a shank portion and a reduced end portion, the latter providing an abutment surface for positioning a cutting link within the sharpener body channel in the proper position for sharpening. The shank portion and reduced end portion of the alignment pin are preferably cylindrical and have different diameters, with the reduced end portion being eccentrically offset from the shank portion and having a diameter substantially equal to the widest diameter of the tapered abradent end portion of the rotary burr.

Abstract: An attachment is provided for allowing a chain saw sharpener to be used for filing the depth gauge portions of the cutting links on the saw chain. The sharpener is of the type comprising a sharpener body in the form of an inverted U-shaped channel-defining member adapted to be placed over the bar of a chain saw, and a rotary burr with an abradant end portion which is receivable in a selected one of two horizontal guide bores provided in the sharpener body. The depth gauge attachment comprises an elongated gauge bar and means for removably affixing the gauge bar within the upper portion of the sharpener body channel so that the gauge bar occupies only a portion of the channel length.

Abstract: A holder for a circular saw blade to permit sharpening of the blade on a sharpener. The holder comprises a bed to receive the saw blade. The blade can be positioned on the bed. There is a slot in the bed and a table. A further slot is formed in the table. A bolt or the like extends through the slots to releasably attach the table and the bed to allow pivoting of the bed relative to the table. The angle of presentation of the blade on the holder to the sharpener is controlled. The holder is simple to operate and easily adjusted.

Abstract: Support structure is provided defining an elongated guide groove for slidingly receiving, guidingly engaging and supporting the guide lugs of an elongated saw chain section for selected positioning of the section along the groove. A tooth locator is provided for engaging and positioning tooth equipped links in a predetermined position along the groove to be similarly engaged and sharpened by a rotary grinding wheel mounted for movement in a predetermined path relative to the support structure. A mount is supported from the support structure and the tooth locator includes an elongated support arm having one end supported from the mount. An elongated finger is provided and pivotally mounted at one end to the other end of the arm for limited angular displacement of the finger relative to the arm about an axis at least closely adjacent and generally paralleling a plane containing the groove and paralleling the direction in which the groove opens.

Abstract: A chain saw work holder designed to horizontally support an entire chain saw, and a portable adapter designed to support said work holder securely and removably while balancing a pivotal rocking tool on a vertical plane in close proximity thereto. Said work holder is composed of a base on which is secured an elongated beam supporting a pivotal deck equipped with two risers. Each riser is supplied with pins to receive rotatable races for securing, movably taught, a chain saw of any size or length. A unique channel morticed into the center of the back riser at an eccentric angle, and releasably lockable to said deck, enables said back riser to adjust to any length of saw chain. A hinged block on each side of said base allows the deck to tilt to right or left and combines with the lateral mobility of the work holder on the adapter to orient a cutting link of a chain saw elevationally, angularly, and laterally, to the vertically disposed cutting element of a pivotal rocking tool.

Abstract: A support is provided from which a drivable rotary grinding wheel is journaled for rotation about a first predetermined axis. A mount is also provided and is supported from the support from guided back and forth shifting relative thereto toward and away from the outer periphery of the grinding wheel along a predetermined path extending at least generally radially of the axis of rotation of the grinding wheel. The support means also supports the mount for limited oscillation of the mount about a second axis generally paralleling the first mentioned axis and the mount includes structure operative to support a length of saw chain therefrom.

Abstract: A first mounting structure is provided and supported atop a support standard. The mounting structure has a motor driven rotary grinding wheel journaled therefrom and a second structure defining a support arm has one end thereof oscillatably supported from the mounting structure for swinging movement of the other end of the support arm about an axis generally paralleling but spaced from the axis of rotation of the grinding wheel. The other end of the support arm includes a mount for supporting a chain saw chain therefrom with a selected tooth of the chain in predetermined indexed position and the support arm is swingable into and out of positions with the selected indexed tooth properly engaged with the periphery of the grinding wheel for sharpening the tooth.

Abstract: A hand-held guide for use in combination with a file for sharpening chain saw cutting teeth, the guide holding said file in axial compression to permit mounting of said file at the axial extremes thereof and to facilitate rotation of said file relative said guide during use. A portion of said guide is designed, when said file is axially compressed in said guide, to abut the cylindrical wall of said file throughout a substantial portion of the file's length, and this same portion is formed as a guide designed to accurately locate the file relative a chain saw cutting tooth, and to provide a gage for determining the proper height of the depth gage portion of chain saw teeth.

Abstract: A tool for placing on a saw chain for guiding a round file for sharpening the cutting edge of a saw chain cutting tooth and for measuring the parameters of a saw chain.