Abstract: A scroller jig saw has a pivoted locking lever spring biased into engagement with a rotatable scrolling control assembly to lock the latter, and therewith the saw blade, against rotation. A cam, preferably rotatably mounted on the scrolling control assembly, is manually movable between a scrolling position in which it holds the locking lever out of engagement with the scrolling control assembly and a non-scrolling position in which the lever is free to be spring biased into locking engagement with the scrolling control assembly.

Abstract: Disclosed is a power tool device comprising a motor capable of driving a tool, a tool operatively connected to the motor, and a handgrip containing a switch for actuating the motor. The switch comprises two electrical contacts biased from contacting each other. Two handgrip has a switch chamber which contains the switch and has an opening on the exterior of the handgrip of sufficient size to remove the switch. A releasable cover plate is provided for closing the opening of the switch chamber. The device further includes a trigger pivotally mounted in a slot in the handgrip, the trigger including an actuator contacting the switch and capable of closing the electrical contacts by mechanical pressure.

Abstract: A pneumatic meat saw including an on-off valve which is actuated to allow air flow to either side of a disk in a shuttle valve. The shuttle valve controls the flow of air to opposite sides of a piston which is operatively connected to a drive shaft which has the saw blade secured thereto. The shuttle valve causes the piston to be reciprocated which in turn causes the saw blade to be reciprocated.

Abstract: An improvement in saw blade suspension device is provided for use with a scroll-saw. By means of a pair of relatively hard washers positioned upon respective upper and lower support arms, and by means of a relatively hard pin, the applied force of and pressure resulting from use of the saw is concentrated on the hard steel washer and the pin. This structure permits the main body of the suspension device to be formed from a relatively soft material.

Abstract: A device for a motorized saw wherein the saw guide bar consists of a reciprocating toothed saw blade (13) and a relative to this stationary support plate (12). One circular disc (14) is loosely laid into an elongated recess (15) in the support plate (12) such that it is movable relative to the support plate (12) as well as to the saw blade (13) and therefore the friction against the support plate is diminished.

Abstract: A compass saw comprises a drive unit for a saw blade holder carrying a saw blade, and a base plate supporting the drive unit. The base plate has on its underside a glide shoe lined on a bottom face with a contact sole. The guide shoe is provided to guide the blade at the level of the base plate, more particularly close above the contact sole, laterally to an extract such as to prevent it from deviating from the desired course, as well from canting and coming into off position.

Abstract: A holder of improved construction for mounting a saber saw blade on a drive means for reciprocation. The holder includes means defining a slot for receiving the blade, and means coupled with the support means for retaining the blade in the slot and for preventing movement of the blade relative to the support when the support and blade are reciprocating under the influence of the drive means. The holding means in several embodiments includes cam members which are received in notches in respective blades. Other embodiments relate to the formation of blade-receiving slots by moving wall means into proximity with recesses in side faces of elongated members.

Abstract: A follower guide for a sabre saw blade stabilizes the unsupported end portion of the blade during cutting operations, assuring a clean precision cut through the workpiece. Twisting, bending and other misalignment of the saw blade is eliminated. The follower guide is spring-urged into engagement with the saw blade and is constructed to coact with all standard sabre saw blades without requiring any modification thereof. The follower guide can be installed readily on various types of saw tables or platforms.

Abstract: An electric jigsaw includes a motor housing, a shoe having a pivot arch and a shoe plate, the arch securing the shoe plate to the jigsaw housing for relative pivotal movement of the housing and shoe plate about the longitudinal axis of the arch. The improvement comprises an axial cavity defined by the arch and the shoe plate, and a plug removably disposed in one end of the cavity, the plug including a plurality of axially-extending slots open at one end thereof for removably receiving attachments for the saw.

Abstract: A holder of improved construction for mounting a saber saw blade on a drive means for reciprocation. The holder includes means defining a slot for receiving the blade, and means coupled with the support means for retaining the blade in the slot and for preventing movement of the blade relative to the support when the support and blade are reciprocating under the influence of the drive means. The holding means in several embodiments includes cam members which are received in notches in respective blades. Other embodiments relate to the formation of blade-receiving slots by moving wall means into proximity with recesses in side faces of elongated members.

Abstract: A reciprocating blade cutting device wherein a reciprocating chuck and blade combination locates the cutting edge of the blade at the forward most point of the housing. Guide surfaces are provided and extend rearwardly from this forward most point along each side of the housing. The guide surfaces are adapted to engage a wall and to guide the saw blade for cutting alongside the wall. The chuck is adapted to fix the saw blade between either of two positions required for directional cutting as established by the two guide surfaces.

Abstract: A modification to an existing adapter for reciprocating saber saws which supports the saw blade on the top of the adapter for making "flush with" cuts along the intersection between floors and walls, the improvement providing a second mounting for the saw blade clamping clip on the side of the adapter for making "flush to" cuts in a floor perpendicular to a wall with the cut ending at the wall.

Abstract: In a compass saw formed as a hand-held machine tool a flat saw blade is connected with a flat reciprocating rod by a connecting device which comprises a cup-shaped clamping sleeve screwed on a rotary member formed with a through hole extended in the direction of elongation of the reciprocating rod the end of which is inserted into that hole. The shaft of the saw blade passes through a bore formed in the clamping sleeve and partially extends into the hole in the rotary member. Two opposing pins formed on the shaft of the saw blade limit the extension of the saw blade shaft into the hole of the rotary member. The end of the shaft is pressed against a recess formed in the reciprocating member, on the one hand, and the pins of the shaft are engaged in depressions formed in the rotary member, on the other hand, whereby clamping of the shaft of the saw blade with the end of the reciprocating rod in the clamping sleeve is ensured.

Abstract: In a motor-driven hand-held saw, the end of the reciprocating rod is clamped with the shaft of the saw blade in a locking sleeve which is displaced between a locked and released position along the elongation of the reciprocating rod and is operated from outside of a protective shield which surrounds the end of the reciprocating rod and the shaft of the saw blade connected to each other by the locking sleeve.

Abstract: An attachment for a sabre saw which enables the sabre saw to be utilized as a motorized hack saw. The attachment includes an attachment guide adapted to be secured to the guide plate of the sabre saw, a hack saw positioned in the attachment guide for reciprocation with respect thereto and a coupling for securing the hack saw to a reciprocal member of the sabre saw. A handle is secured to the attachment guide to facilitate handling of the hack saw attachment in assembly with a sabre saw. In addition, heat insulating material is place on portions of the attachment guide to reduce friction created external temperatures of the portions of the attachment guide.

Abstract: A holder of improved construction for mounting a saber saw blade on a drive means for reciprocation. The holder includes means defining a slot for receiving the blade, and means coupled with the support means for retaining the blade in the slot and for preventing movement of the blade relative to the support when the support and blade are reciprocating under the influence of the drive means. The holding means in several embodiments includes cam members which are received in notches in responsive blades. Other embodiments relate to the formation of blade-receiving slots by moving wall means into proximity with recesses in side faces of elongated members.

Abstract: This invention relates to the counter-reciprocating double blade saws including a pair of the saw blades disposed in side by side relationship, one extremity of each of the two saw blades is connected to two counter-reciprocating holders driven by a power source, respectively, which arrangement is for the counter-reciprocating double blade saw of the saber saw type. The other extremities of the two saw blades connected to two reciprocating saw blade holders at their one extremities are connected to a pair of the idler counter-reciprocating saw blade holders supported by the common frame that also supports the drive counter-reciprocating saw blade holders in the construction of the counter-reciprocating double blade saw of the bow saw or butcher saw type. The counter-reciprocating double blade saw of the two-man type saw is constructed when said common frame is removed in the counter-reciprocating double blade saw of the bow or butcher saw type and a pair of handles are added to two opposite extremities.

Abstract: A sabre saw chuck for securing the shank of one or more files/rasps to the standard head of a sabre saw such that the reciprocating motion of the saw head is imparted to the file/rasp secured thereon. The chuck includes an adaptor body having a centrally disposed bore which receives the sabre saw head. Means are provided which extend through the adaptor body for securing the adaptor body in position on the sabre saw head. The adaptor body includes at least one groove disposed proximate its perimeter for receiving the shank of a file/rasp. A sleeve is telescoped over the adaptor body and secures the file/rasp shank or shanks in position such that reciprocation of the saw head imparts a like reciprocating motion to the file/rasp carried by the chuck.

Abstract: A holder of improved construction for mounting a saber saw blade on a drive means for reciprocation. The holder includes means defining a slot for receiving the blade, and means coupled with the support means for retaining the blade in the slot and for preventing movement of the blade relative to the support when the support and blade are reciprocating under the influence of the drive means. The holding means in several embodiments includes cam members which are received in notches in respective blades. Other embodiments relate to the formation of blade-receiving slots by moving wall means into proximity with recesses in side faces of elongated members.

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: This disclosure concerns the adaption of power means to the operation of filing. Provided is a file tool which is supported and reciprocated by a file tool adapter which in turn is connected in rigid manner to the reciprocating bar of a power device for converting rotary motion to reciprocating motion. A second embodiment, the file tool and adapter being constructed unitary.

Abstract: An oscillating saw accessory for a tool having a reciprocating member such as a saber saw is provided. A circular saw blade is mounted in a housing which permits rotary movement of the saw blade. The housing is attached to the tool with the saw blade adjacent to the reciprocating member. The reciprocating member is attached to the saw blade so that the reciprocating movement of the reciprocating member produces an oscillating movement of the saw blade.

Abstract: A sawing device for translating the shape on a template to an accompanying sawing blade which gauges the workpiece to cut the workpiece in the desired shape and includes a table which detachably supports a pattern or template. The template is securable at one edge of the table surface. A track is supported at opposite edges of the table in a carriage assembly. The carriage assembly permits the entire track assembly to be moved in the X-X axis or longitudinally along the table. The carriage comprises a cylindrical sleeve secured to the end of the track which receives a longitudinal rod mounted to the table by appropriate brackets. The track defines a groove and supports a motor. The motor has a lip engaging the groove so the motor may be moved in the Y-Y axis or transversely of the table. The motor drives a vibrating or oscillatory blade which depends from the motor through the slot. The guide member also depends from the motor and is received in a groove in the subjacent template.

Abstract: In accordance with the present invention a motorized sabre saw for reciprocating an elongated saw blade, or the like, is provided with a saw bar and blade holder or chuck combination wherein an end portion of the saw bar is of generally circular cylindrical configuration having a longitudinally extending groove therein having a first wall spaced apart from a radius of the bar a distance substantially equal to one-half the thickness of the blade to be driven thereby and generally parallel such radius and a second wall generally perpendicular the first wall extending from the first wall across such radius with the first and second walls defining therebetween a generally square shoulder whereby a blade clamped thereagainst will be generally bisected by such radius, together with a clamp block mounted with the saw bar over at least a portion of such groove and having a first generally cylindrical aperture a major portion of which is generally circular and complementary to the end portion of the saw bar and the re

Abstract: A portable saw table having an elevated, adjustable track for accommodating various cutting tools such as sabre saws, circular saws and routers, a guide mounted beneath the conventional saw table slot for guiding a cantilevered type blade, such as a sabre saw, during the reciprocatory movement thereof, an adjustable guide member connected to the arm of a protractor mounted on the table, and a pressure block adjustably mounted on the table for biasing the workpiece against the protractor guide member during the cutting operation.

Abstract: A replaceable hacksaw blade, a reciprocating shaft connected to the hacksaw motor, and a novel clamp for securing the blade to the shaft, the blade and shaft having cooperating abutments for better securing the blade against rotational forces and vibration.

Abstract: A holder of improved construction for mounting a saber saw blade on a drive means for reciprocation. The holder includes means defining a slot for receiving the blade, and means coupled with the support means for retaining the blade in the slot and for preventing movement of the blade relative to the support when the support and blade are reciprocating under the influence of the drive means. The holding means in several embodiments includes cam members which are received in notches in respective blades. Other embodiments relate to the formation of blade-receiving slots by moving wall means into proximity with recesses in side faces of elongated members.

Abstract: A laminate cutting assembly includes spaced upper and lower plates whereby the laminate sheet may be inserted therebetween and cut by a cutter extending through aligned slots in the plates with a movable guide bar assembly having a guide surface in the space between the plates controlling the width of the cut.

Abstract: A crosshead for a scotch yoke mechanism is formed from a generally rectangular blank of sheet steel provided with a generally oval, straight sided opening extending generally transversely medially thereof and a pair of generally circular openings centered and spaced apart from each of the oval opening straight sides, the blank being formed, as on a four slide forming machine generally around two generally parallel lines each being generally extensions of the oval opening straight sides to provide top and bottom generally parallel panels defining a closed end guide track having parallel sides and positioning the generally circular openings in the top and bottom panels and in line to be threaded on a generally cylindrical tubular saw bar of a sabre saw, the blank being further formed to tubular configuration of generally rectangular cross-section by two further parallel bends closing the crosshead on a fourth side on the side of the saw bar opposite the guide track opening.

Abstract: A hack sawing machine is disclosed, which comprises a base, a case, a shaft rotated by a motor, a saw blade bow guided in a sliding movement in the case, a drum cam which causes the blade to have an active forward stroke and a passive return stroke, a two-armed lever (bracket), eleastic means which, rotating the case, bring the blade back into the cut after the passive stroke and a hydraulic system. This system comprises a hydraulic cylinder, a hydraulic circuit having a hydraulic pump to pump oil to the cylinder. The hydraulic circuit acts to maintain a predetermined pressure of the saw blade bow on the workpiece during the active stroke and camming means cause the bow to be raised during the passive stroke.

Abstract: A mucotome or mucous membrane cutter for mucogingival membrane surgery is disclosed. The mucotome comprises a handle having a small, compactly designed cutting head arranged on its forward end, the cutting head including a circular cylindrical blade-holding roller which is reciprocable parallel to the blade edge in a guide by means of a drive shaft having an eccentric crank pin engaging in cross grooves of the blade-holding roller. A cutting shoe is mounted to the ends of the blade-holding roller and is rotatable relative to the cutting head through a limited angle. The cutting head is also selectively positionable in at least two angular positions relative to its support. The cutting blade is secured in a longitudinal radial slot in the roller and projects therefrom through a guide slit formed in a crosspiece of the cutting shoe. The construction and arrangement of the cutting head and cutting shoe assure a compact, versatile structure having a number of adjustment possibilities.

Abstract: An attachment for a typical saber saw to allow the depth of cut of the saber saw to be varied. The attachment includes a parallelogram-type member for attachment to the underside of the base plate of the saber saw and an adjustment member for varying the overall thickness or height of the parallelogram-type member whereby the depth of cut of the saber saw is effectively varied.

Abstract: An attachment for use with a saber saw which enables the saber saw to make straight non-wandering cuts. The attachment includes a plate which is secured flatwise to the base of the saber saw and a supporting fin extends downwardly from the plate and is located behind the reciprocating blade of the saber saw. The lower portion of the fin has a pair of spaced guides which define a slot to receive the blade. The fin and guide members maintain the blade in perpendicular relation to the base plate and prevent deformation of the blade as a cut is made.

Abstract: A mucotome or mucous membrane cutter for mucogingival membrane surgery is disclosed. The mucotome comprises a handle having a small, compactly designed cutting head arranged on its forward end, the cutting head including a circular cylindrical blade-holding roller which is reciprocable parallel to the blade edge in a guide by means of a drive shaft having an eccentric crank pin engaging in cross grooves of the blade-holding roller. A cutting shoe is mounted to the ends of the blade-holding roller and is rotatable relative to the cutting head through a limited angle. The cutting head is also selectively positionable in at least two angular positions relative to its support. The cutting blade is secured in a longitudinal radial slot in the roller and projects therefrom through a guide slit formed in a crosspiece of the cutting shoe. The construction and arrangement of the cutting head and cutting shoe assure a compact, versatile structure having a number of adjustment possibilities.

Abstract: A sawdust removal device for attachment to the exterior housing of a saber saw or other electric-powered saw or drill. The device traps air discharged from an exhaust port in the saw or drill housing and diverts that air to continuously blow away sawdust, chips and other debris which accumulates on the surface of the material being cut or drilled during operation of the saw or drill.

Abstract: A blade having a chisel point at one end and a cutting point intermediate its ends is mounted in the blade holder of a sabre saw. As the sabre saw is moved along the wallboard to be cut, the chisel point on each stroke moves through the gypsum core, its rearwardly inclined end forcing the gypsum back into the kerf. The chisel point need only fracture the paper on the rough side of the wallboard, although it may pass completely therethrough. The cutting point severs the paper on the finished side of the wallboard.

Abstract: A clamp arrangement for clamping saw blades to the blade holder of a power driven saw includes a seating surface formed on the end portion of a blade holder of the power driven saw for receiving the saw blade thereon. A collar surrounds the end portion of the blade holder and the shank portion of the saw blade. A threaded annular member threadably engages the collar and presses the saw blade against the seating surface and the end portion of the blade holder is, in turn, pressed against the inside wall surface of the collar. A clear passage through the annular member facilitates access to the shank portion of the saw blade held between the annular member and the seating surface whereby the shank portion can be easily removed from between the annular member and the receiving surface with the aid of an instrument passed through the clear passage in the event the blade should break off at the shank.

Abstract: A control handle for saber saws for turning the saw about the axis of reciprocation of the saw using a rotating handle having its axis parallel to the work surface and perpendicular to the axis of reciprocation of the saw blade. The control handle is the main handle for manipulating the saw and is mechanically linked to the saber saw blade to permit the saw blade to be guided by rotation of the handle. A transversely extending shaft parallel to the work surface is also linked to the saber saw blade and has knobs on its opposite ends so that the blade may be guided therewith.

Abstract: A portable power driven implement having a motor as a power source and a drive train which is compact and the components of which are readily accessible, in which the motor rotates drive means which is connected to rotate output means, and in which a linking member connected to the rotating output means imparts reciprocating motion to a tool member, the linking member spanning the drive means and configured to avoid interfering engagement therewith.

Abstract: In a power tool, particularly a saber saw having a cutting blade, a combination comprises a handheld housing having an upper and a lower portion and an end portion formed with an elongated bore which extends downwardly from the upper portion towards the lower portion. A cutting element is mounted at a lower region of the end portion of the housing. A guide handle has a hand-held head portion mounted at the upper portion of the housing, and an elongated shaft portion received in and mounted for turning movement relative to the elongated bore in either circumferential direction thereof so that the housing can be turned with respect to the handle during cutting for positioning the cutting element in a plurality of different cutting positions. The handle is mounted and de-mounted on the housing with a snap-type action. A locking bolt prevents the handle from being undesirably withdrawn from the bore without authorization.

Abstract: A connecting mechanism for a saw blade of a surgical cutting tool in which the blade has two side projections spaced slightly from one end thereof and in which the connecting mechanism comprises a rotatable collar on the end of a reciprocating shaft which moves the blade; the end of the shaft and collar having slots alignable to receive the blade and the collar having pockets to receive the projections when the collar is released to rotate to a blade moving position.

Abstract: A powered saw developed for use in orthopaedic surgery has a strip-form blade carrier projecting from a casing in which it is driven at its inner end in an orbiting manner while further towards the carrier free end the carrier is constrained to allow longitudinal translation and pivotal movement. In consequence, the free end of the carrier, and all points of a blade projecting therefrom, are also subjected to an orbital motion. By appropriate location of teeth the blade can therefore cut in any combination of both sideways directions and also at its tip, and preferably has non-symmetrical teeth which are all raked in the same sense around the edge of the blade.