Abstract: The diamond tipped nut filing tool includes a body and a diamond tipped file. The diamond tipped file may be disposed along one end of the body. The body has a longitudinal length and at least half of the length includes a circumference so that at least one half of the longitudinal length is rounded.

Abstract: Provided are a security apparatus and an operation method thereof. The security apparatus comprises a core circuit which performs a security function by using an authentication key such as a secret key provided by a physically unclonable function (PUF). The security apparatus may receive event information indicating that the security apparatus is in a security-vulnerable state such as a case where the security apparatus is stolen or lost. In such case, a power management circuit can apply at least one electrical shock of overvoltage and overcurrent to the security apparatus to cause physical damage to the security apparatus, so that the core circuit does not perform the security function normally.

Abstract: The principles described herein provide methods and systems of providing a user interface to allow a user to compose and send an electronic communication quickly and conveniently. For example, a user interface includes split-pane interface having a navigable tray area and a composition area. The navigable tray area may include categories of trays, each tray including a navigable listing of content items that may form part of the electronic communication. The navigable tray area allows the user to navigate from one tray to the next to access different types of content items to be used in composing the electronic communication. When composing an electronic communication, a user can select an item in a tray, and the item is previewed in the composition area and can become part of the electronic communication.

Abstract: The principles described herein provide methods and systems of providing a user interface to allow a user to compose and send an electronic communication quickly and conveniently. For example, a user interface includes split-pane interface having a navigable tray area and a composition area. The navigable tray area may include categories of trays, each tray including a navigable listing of content items that may form part of the electronic communication. The navigable tray area allows the user to navigate from one tray to the next to access different types of content items to be used in composing the electronic communication. When composing an electronic communication, a user can select an item in a tray, and the item is previewed in the composition area and can become part of the electronic communication.

Abstract: A file handle has a body, a ferrule, a clamping assembly, and a cap. The body has a first end and a second end opposite to the first end. The ferrule is assembled at the first assembling end of the body. The clamping assembly is movably mounted in the body and has two clamping portions and a threaded hole. The two clamping portions extend through the ferrule. The two clamping portions are subjected to an elastic force and oppositely separated from each other. The threaded hole is adjacent to the second assembling end of the body. The cap is rotatably assembled at the second assembling end of the body and has a screwing stick screwed in the threaded hole. Because the space between the two clamping portions can be adjusted by turning the cap, a user can clamp a tang of a file blade by the file handle.

Abstract: The disclosed embodiments relate to implementation of a trading system, which may also be referred to as a trading system architecture, having improved performance which further assures transactional determinism under increasing processing transaction loads while providing improved trading opportunities, fault tolerance, low latency processing, high volume capacity, risk mitigation and market protections with minimal impact, as well as improved and equitable access to information and opportunities.

Abstract: A sharpening device for manually sharpening the cutting teeth of saw chains for chain saws has a frame, which has two head parts (spaced apart from one another and two pairs of guide rods which are, in each case, arranged parallel to one another and to a longitudinal axis and rigidly connect the head parts to one another. Parallel to the longitudinal axis, round files and two file faces are held without play, but exchangeably in the head parts. The pairs of guide rods and the respective associated round files and the respective file faces are arranged rotationally symmetrically with respect to the longitudinal axis.

Abstract: A file guide is provided having a tubular handle, a spindle, and a retainer. The tubular handle has a central bore with an inner bearing surface and an outer gripping surface. The spindle has a cylindrical outer bearing surface configured to mate in complementary, rotatable relation with the inner bearing surface of the handle, a head at a proximal end, a lock portion at a distal end, and a central receptacle configured to receive a file shank.

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: For users of chain saws it is known that the chain saw teeth should rather often be sharpened by filing in order to keep them well cutting. Traditionally, such a sharpening is effected by means of a straight filing rod moved in a reciprocal manner, but according to the invention it is realized that it is better to arrange the rod as a rotary circular or screw shaped formation, whereby the teeth can be worked in a simplified manner.

Abstract: A saw chain sharpener for a chain saw and a chain saw having a sharpener in which the bottom surfaces of the cutting teeth of a conventional bottom sharpened saw chain are conveniently sharpened automatically by running the chain under power through the sharpener. The saw chain can be sharpened using the sharpener in a matter of typically twenty to thirty seconds without removing the chain from the chain bar. The sharpener is preferably adapted to be removably mounted to a bracket which is itself preferably removably disposed on the chain saw. The sharpener comprises a sharpening tooth disposed in a housing which is mounted on the chain bar. A top surface of the sharpening tooth frictionally engages bottom surfaces of the cutting teeth of the chain as the chain is run under power. A device for dispensing a sharpening compound to the sharpening tooth during sharpening may be disposed on the sharpener housing.

Abstract: A chainsaw blade sharpening system is provided including a clamping assembly adapted for being mounted to a recipient surface and adapted to clamp opposite sides of a chainsaw blade. Also included is a file mounting assembly fixed with respect to the clamping assembly. Next provided is a file slidably coupled to the file mounting assembly. A chain stop is mounted on the file mounting assembly and is adapted for abutting a side of a tooth of the chainsaw blade opposite that which is sharpened by the file.

Abstract: A guide which can be mounted to the teeth of a saw blade, for guiding a file used to sharpen the blade's teeth. The file guide comprises two spaced-apart, substantially parallel arms adapted to receive a saw blade therebetween. Each of the substantially parallel arms has a main arm portion and a secondary arm portion connected to one another by a preferably pivoted elbow portion. The file guide further comprises a guide member adapted to straddle the saw blade, and a tooth engaging member connected to, and disposed between, the secondary arm portions. The substantially parallel arms, guide member and tooth engaging member are arranged with respect to one another, such that the guide firmly engages a saw blade when the tooth engaging member and the guide member are brought against the teeth of the saw blade, with the saw blade being received between the substantially parallel arms. Preferably, rollers are mounted on the guide member, which rollers guide a file inserted therebetween.

Abstract: Filing gauge for sharpening of a saw chain with cutter (13) and depth gauge (14), comprising a housing (21) which can be located on the saw chain in two angular positions, two parallel shafts (26,27) fixed to the housing, two rollers (28,29) with guiding grooves for a round file slidingly journalled on the shafts, a roller follower (30) slidingly journalled on the shafts without angular mobility and permitting only parallel and simultaneous motion of the rollers, and a guide plate (40) for filing the depth gauge swingably affixed to the housing.

Abstract: A chain saw file case is arranged for the mounting and securement of a chain saw file to protect the relatively brittle file for maintaining its integrity and continued use. The case includes a cap threadedly securable within a base, with the cap and base coaxially aligned and the base including an alignment bushing formed with a conical interior surface at a lower terminal end thereof, with the base further including a tubular magnet mounted adjacent an upper terminal end thereof to accommodate and attract various metallic debris resulting from use of the file structure.

Abstract: An improved round file holder having guide rails along the edges thereof for use in conjunction with a chain saw filing guide for sharpening chain saws and having a pair of identical stringer secured together to support the files from the ends thereof and held together by an adjustable fastener to accommodate different diameter files.

Abstract: A chain saw sharpener including a base plate; a clamp affixed to the base plate for holding the bar of a chain saw in vertical orientation; a tubular guide member affixable on the base plate at a selected angle relative to the clamp and hence the chain saw; a file carriage provided with a top rod insertible into the guide member for reciprocal and rotational movement relative thereto and an underlying bottom rod having a pair of downwardly depending file support members for giving support to both ends of the file; and a circular file rotatably mounted within the support members. A handle affixed to the file permits full foxibility and positioning of the sharpener in relation to the teeth to be sharpened. The top rod of the file carriage is provided with a free end for convenient insertion and removal from the file guide.

Abstract: A sharpening guide for a file to be used in sharpening a chain saw chain. The guide a semi-cylindrical body is a close fit on a round file. There is a first support for the file at one end of the body. The support has an opening to receive the round file. The dimensions of semi-cylindrical body and the support allow the file to rotate in the guide.

Abstract: A chain saw sharpening tool having a channel section which fits over a saw chain and cutter bar and has a file holder guide secured thereto for engaging a file holder and orienting it with respect to the saw chain during filing of the saw chain teeth for sharpening.

Abstract: A chain saw sharpening guide is comprised of a relatively thick rigid and rugged plate metal member which has a threaded bore to receive a micrometer-type height adjustment screw to give an accurate indication of the raker (also called depth gauge) tooth on the chain. The metal plate member is elongated and has a length spanning at least the distance between at least three consecutive teeth on the chain saw. A cut-out or notch formed on one long side of the plate member permits the plate to rest on two consecutive teeth on the same side of the chain saw with the intervening tooth on the opposite side projecting upwardly into the notch or cut-out space so that the measurements of depth of cuts skips the tooth on the opposite side of the chain and uses for the depth gauge measurement the two teeth on the same side of the chain. A sunburst angle gauge from 0 to 35 degrees (in 5 degree increment) for either the left or right tooth angles is formed in the top surface.

Abstract: A filing guide for a saw chain having inner links with spaces therebetween, outer links and cutter teeth. The filing guide comprises a rigid body with a front edge shaped to abut against the inner links and a pair of spaced-apart elongated members extending perpendicularly from the body adjacent the front edge. The members are shaped to fit within the spaces between the inner links and the body is shaped to glidably receive a round file so that a cutter tooth can be filed by the round file when the filing guide is positioned for use with the members inserted in the spaces between the inner links. The top of the body is flat.

Abstract: A file guide for filing a depth gauge on a saw chain cutter having a cutting tooth with a cutting tip while the cutter is connected as a part of a continuous saw chain. The file guide is adapted to rest on the saw chain incorporating a plurality of cutters and includes an elongated base member having a slot to receive a portion of a depth gauge and at least one downward projection depending from said base member to engage with the cutting tooth to cause said base member to avoid contact with the cutting tip of the cutting tooth.

Abstract: A system for sharpening teeth on a saw chain includes both a motorized grinder and a separate gauge. The grinder includes a rotary grinding element and a height plate which is adjustable relative to the grinding element. The grinder may be used alone to sharpen the cutting edge of individual saw teeth and used in conjunction with the gauge to grind down the forward post of the saw tooth. Specifically, the gauge includes a plate and a flange along one edge of the plate, both the plate and the flange including an opening therein. By placing the flange of the gauge over at least two adjacent saw teeth, the upper surface of the flange defines a reference plane relative to the forward post of the teeth. The grinder may then be used in conjunction with the gauge to grind down the forward post to a preselected depth relative to said reference plane.

Abstract: A sharpening guide for a chain saw with a vertical longitudinal channel which is placed on a saw chain and saw bar in a straddling position enabling the guide to move along the chain and bar while filing right hand and left hand cutters. The guide includes two transverse channels; six fixed transverse filing angles consisting of 30, 35 and 40 degrees with file and guide alignment lines; four 10 degree pitch filing angles; a detachable spacer to eliminate saw chain side movement or wobble; and an alignment and locking mechanism consisting of three adjustable bolts which holds the guide squarely and firmly in place allowing the operator to use both hands when filing cutters.

Abstract: A guide for aiding in sharpening a chain saw with a file which includes a magnet having an elongated rod extending outwardly therefrom at an angle corresponding to the desired angle that is to be sharpened on the cutting edge of a tooth of a chain saw. The magnet is attached to a guide bar of the chain saw. When sharpening the teeth, the chain is moved around the saw and a file is moved across the leading edge of the tooth at an angle corresponding to the angle of the rod.

Abstract: Chain saw sharpening apparatus that incorporates a rotary file replaceably journaled in a guide structure, with the file coupled to or adapted to be coupled to an electric driving motor. The guide structure has finger or handgrip at one end remote from the motor, and the latter is provided with a handgrip or can be hand-gripped directly. The rotary file is provided adjacent its end remote from the motor with a radial enlargement that is at least in part defined by a surface of revolution enabling its function as a stop or as a thrust bearing. A guide bracket is provided that can be mounted on the chain saw bar; such bracket being provided with adjustable upstanding guide pins for coacting with guide slots in the guide structure.

Abstract: A device for controlling filing of a depth gauge of a saw chain has an elongated file holder with a center portion having clips for holding a file. The filing surface of the file faces outwardly from the holder. The file holder has a flat surface facing outwardly on a first side of the center portion and has a straight edge facing outwardly on a second side of the center portion. The flat surface and the straight edge are positioned relative to the center portion such that, after a depth gauge of a first cutter link has been filed to a desired level, the flat surface rests against the cutter edge of the first cutter link while the straight edge engages the non-cutter link of the chain and a back of a second cutter link.

Abstract: A device for sharpening saw chains while the saw chain is mounted on a chain saw cutting bar. The saw chain sharpening device is designed for use by a chain saw operator at the job site. The device comprises a frame configured to be straddle mounted over the saw chain and removeably clamped to the cutting bar. The frame has mounted thereon at least one pair of diammetrically opposed bushings having an inside diameter to accept a saw file and to permit the file to be slideably moved and axially aligned with the axis of alignment positioned relative to the saw chain so that the saw tooth being filed will be filed at the proper angle. The file guide bushings also provide precise control of the saw file position relative to the saw tooth being sharpened.

Abstract: A visual guide for sharpening chain saw teeth. Magnetic material is affixed to one leg of an elongated member having an L-shaped cross section. The magnetic material is affixed to the external portion of the leg such that when the device is magnetically attached to a chain saw blade, the other leg of the device will extend away from and parallel to the chain saw blade. Markings are formed on the upward-facing portion of the second leg indicating the correct angle for applying a circular file to the cutting edge of the chain saw tooth. Notches are formed on the device for use as a template in gauging the proper shape of the chain saw tooth being filed.

Abstract: A chain saw sharpener, having a fixture comprising a generally inverted U-shaped frame and a sharpening tool guide attached to a support bracket extending from the frame, which sharpening tool guide receives and guides a sharpening tool for use in sharpening the cutting links of a chain saw and is movable and may be set for sharpening of the cutting links at any angle specified by the chain saw manufacturer. The sharpening tool is a rotatable mandrel with a grinding stone at one end and structure at the opposite end for attachment to any suitable driving apparatus. A plastic shield protects the operator from being struck by metal fillings that are generated during the sharpening operation. A filing gauge attached to the frame indicates the height to which the depth gauges of the cutting links should be filed and incorporates stops to protect the cutting edges of the cutting links against contact with the file during such filing operation.

Abstract: A sharpening device for supporting a file for sharpening the cutting elements of a chain saw. The device includes a base portion that is removably secured to the chain bar of the chain saw, and a top guide portion slidably mounted on the base portion and for supporting the file. The top guide portion moves between a first position at the chain for sharpening one of the cutting elements and a second position away from the chain to permit indexing of the chain to locate another cutting element for sharpening. In one embodiment, the base portion includes two sidewalls, and the chain bar is clamped between the sidewalls. In an alternate embodiment, the base portion includes a magnet for holding the base portion to one side of the chain bar, and further includes two flat pins that project from the base portion for resting on the chain bar.

Abstract: A sharpening guide for use with a chain saw comprising a support member adapted to rest upon the teeth of a chain in a straddling relationship thereto and having a dependent portion which will extend downwardly in a side by side relationship with the chain saw bar when the support member is in the straddling relationship. A locking member mounted on the support member for movement along a path inclined to the dependent portion so that it may engage the bar or chain of the saw and clamp it against the dependent portion of the support member in a wedging action. A pair of grooved rollers mounted on the support member so as to lie on opposite sides of the chain and of a diameter and disposition so that a file seated in the grooves thereof will be at the required inclination to sharpen teeth at the correct cutting angle.

Abstract: An apparatus for use in combination with a specialized rotary steel file for enabling the sharpening of saw chains that includes an inverted channel-shaped body for accommodating a chain saw bar and saw chain therein. Adjustable chain centering elements serve to limit and predetermine the desired spatial relationship of the body and the bar which can be secured by clamping screws engageable with the bar. A recess in the body constitutes a window giving access to the saw chain, with guide grooves in the body at the bottom of the recess serving to position the rotary file during the sharpening procedure. A chain advancing unit is provided for properly advancing one tooth at a time to register properly a tooth to be filed with the grooves. A gauge is positionable in the recess to enable dressing gauge teeth of the saw chain to proper height is also provided.

Abstract: A chain saw sharpening guide manually held in position on the saw chain comprising a support plate (11) carrying grooved rollers (13, 13a) mounted on brackets (12, 12a) depending from the plate (11). The rollers (13, 13a) are grooved (15, 15a) to receive the saw sharpening file (34) in rolling contact and maintain it parallel to the plate. In use the guide is located on the saw chain with the rollers straddling the chain with the file in contact with the saw tooth and with the rollers. A slot (16) in the plate (11) allows the operator to view the sharpening action. Variations provide graduations and stops for correct angle of cut and undercut of cutting edge plus adjustment of the saw tooth depth gauge.

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 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: A device for holding a saw chain during sharpening of the chain cutters which prevents wobble by gripping both the cutter train and the drive train of the saw chain.

Abstract: A sharpener for manual sharpening of the cutting teeth of saw chains for chain saws having a depth limiter disposed in front of the cutter in the cutting direction for controlling the depth of the cut. The cutter is defined by the line passing through a free surface forming the back of the teeth and a cutting face situated on the front of the teeth. A round file is provided for sharpening the cutter by cutting processing of the cutting face. The file is adapted to the tooth front with the cutting face in cross-section. Parallel to the round file, are positioned a guiding rod, which can be placed on the free surface of a cutting tooth to be sharpened, a guiding rod, which can be placed on the free surface of an adjacent cutting tooth, and a second file which can be placed on the depth limiter of the cutting tooth to be sharpened. The two guiding rods, the round file and the second file with respect to each other corresponds to the geometry of the cutting teeth.

Abstract: A support for sharpening chain saws is disclosed consisting of an L-shaped member having a threaded spike adapted to be screwed into the cut surface of a tree trunk. The horizontal arm of the member is provided with clamping means to hold fast the blade of the chain saw. A second, straight member adapted to support the handle or safety guard of the chain saw is height-adjustably secured to the vertical arm of the L-shaped member. The chain saw is held in upside down position for easy access to the chain teeth to be sharpened.

Abstract: A file guide for use in sharpening a chain saw having a bar, a chain around the periphery of the bar, and a plurality of teeth secured at intervals along the chain, each tooth having a cutting edge at one end thereof constituting its forward end. The file guide comprises a frame adapted to be mounted on the bar of the chain saw, a carriage slidably mounted on the frame for forward and rearward movement relative to the tooth to be sharpened, and a stop carried by the frame for holding the tooth against rearward movement. The carriage has a pair of guide members guiding a file for reciprocation at a predetermined angle relative to the tooth through a cutting stroke of the file for sharpening the tooth at the predetermined angle and a return stroke. The guide members are disposed on opposite sides of the tooth and are spaced longitudinally of the carriage.

Abstract: A portable apparatus useable with a rod file to sharpen the teeth of a chain saw. The apparatus has a base that clamps onto the blade of the saw. A chain holding finger mounted on a support carried by the base fixes the position of the tooth to be sharpened and aligns the rod file with the cutting edge of this tooth. An angled groove in the base serves as a guide and support for a slide attached to the file so that the file sharpens the tooth at a fixed angle and elevation.

Abstract: A saw chain sharpening fixture is disclosed featuring an inverted U-shaped frame adapted to be installed on a cutter bar of a chain saw and having a sharpening opening in a frame. A pair of sharpening tool adaptor guides are mounted on sidewalls of the frame and diverge outwardly from the sharpening opening, the adaptor guides each having an elongated bearing surface the lowermost portion of which is adapted to be disposed below the top of the cutter bar for supporting a sharpening tool adaptor on a selected one of the guides.

Abstract: A flat sheet metal plate defining a reference plane on one side. Said plate having first and second sections and an intermediate section. The first and second sections being flat and in a common plane, and the intermediate section formed into a semi-circular loop with a center portion of the loop removed. The remaining portions of the semi-circular loop provide a pair of guide lugs to guide a round file. The first and second sections are adapted to rest on the depth gauge and cutter of a cutting link in a saw chain with the guide lugs straddling the chain and aligned with the gullet of a cutting link to guide the file in a desired orientation against the cutting edge of the cutting link.

Abstract: An adjustable chainsaw file guide and holder comprised of a frame formed of stamped sheet metal including a V-shaped guide surface portion and a handle portion, two clamping members slidably engaged with and adjustable along the guide surface portion of the frame for securing any one of different length chainsaw files in spaced alignment with the guide surfaces, and a means within said clamping members for positively centering any one of different standard diameter chainsaw files with respect to the vertex of the V formed by the guide surfaces.

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 filing guide for a chain saw which defines a longitudinal slot therethrough for the chain and at least one transverse slot is defined through the guide and channel for a file to be used on the teeth. Legs of the guide defining the chain channel are unequal in length so that pressure exerted by the thumb or fingers will clamp the guide laterally to the saw bar while downward hand pressure on the teeth hold the teeth firmly in the bar guide.

Abstract: A saw chain sharpening fixture is disclosed featuring an inverted U-shaped frame adapted to be installed on a cutter bar of a chain saw and having a sharpening opening in a frame. A pair of sharpening tool adaptor guides are mounted on sidewalls of the frame and diverge outwardly from the sharpening opening, the adaptor guides each having an elongated bearing surface the lowermost portion of which is adapted to be disposed below the top of the cutter bar for supporting a sharpening tool adaptor on a selected one of the guides.