Abstract: The table of a mitre saw has an extension table detachably attached thereto at each end. The extension table carries a fence in alignment with the mitre table fence, and the fence carries a movable stop and index scale. The stop can be fit on either the left or right extension table fence. The mitre saw is preferably mounted on its own base, with the base being provided with wheels for easy transport and removable legs for support. The left and right extension tables each have pivotable support legs and, when detached, the extension tables are carried and protected in a carrying case.

Abstract: An elongated member (20) is fed by a feed conveyor (12) through a cutter (14) which is actuated to cut a first section (21). A takeaway conveyor (16) carries the first section (21) and a second section with a gap between the trailing end of the first section (21) and the leading end of the second section. Detection means (22) located along the takeaway conveyor (16) at a predetermined distance (L) from the cutter (14) actuates the cutter (14) in response to detection of the leading end of the second section providing a second section of a predetermined length (L). Other detection means (42,132) located at other positions along the conveyors (12,16) provide for stopping the apparatus (10) in the event of jamming or after the trailing end of the elongated member (20) reaches the feed conveyor (12).

Abstract: A device for removing the perforated guide edges from computer paper by a shearing action. The computer paper is supported on a support plate of a first frame, with the line of perforations substantially aligned with a shearing edge provided on the distal end of the support plate. A shearing mechanism is slidably mounted for vertical movement in a second frame which is secured to the top of the first frame. The shearing mechanism includes a shear plate which is movable downward for engagement with the computer paper along the line of perforations where application of an additional force to the shear plate results in clearly shearing the perforated edges from the computer paper. Springs bias the shear plate upwardly for another shearing operation.

Abstract: The invention relates to an apparatus for cutting threaded rods.This apparatus essentially comprises a frame (1) to which a square (2) is fixed by a bolt (6), the said square having a semicylindrical threaded nest (2a) at the top, and to which a moving part (3) is jointed, the said moving part being provided at the bottom with another semicylindrical threaded nest (3a) arranged opposite the one (2a) located in the fixed part (2). The moving part (3) is actuated by a force-multiplying lever (4).The threaded nests (2a and 3a) come to bear against the threaded rod (5) at the moment when cutting takes place, so as to preserve the integrity of the thread of the threaded rod (5).Application: building industry.

Abstract: A combination tool for punching and/or shearing metal has pivotally mounted punch and die set on one end of a working bed and a shear blade pivotally mounted on the other end of the bed, with an hydraulic ram centrally mounted above and between them to apply force to either or both simultaneously. Furthermore, both can easily and quickly be pivotally displaced to permit optional application of the hydraulic ram to pressing, braking, or forming operations on the bed under the ram, using auxiliary equipment.

Abstract: A breaker apparatus having a base including spaced parallel side members and a bottom plate connected to the lower edge of each side member. A fixed king pin extends between the side members and a breaker arm is rotatably mounted on the king pin. A hydraulic cylinder is pivotally mounted on the base, and the rod extending from the cylinder is pivotally connected to the rear end of the breaker arm so that extension of the rod from the cylinder pivots the breaker arm about the king pin to rotate the forward end of the breaker arm downwardly to contact a metal piece lying on the upper forward corners of the side members.

Abstract: A multiple punching machine for punching out holes in the partition walls of a battery box. To accommodate all the different sizes and shapes and dimensions of battery boxes, the machine has multiple punching heads which are independently operated and independently positioned longitudinally, laterally, and vertically. Each head consists of a pair of pivoted punch jaws of small transverse dimensions to fit into small battery cells and each head is operated by an independent pneumatic ram with the piston rod moving along the length of the limbs of the jaw to minimize transverse diemensions. By using independent heads the reaction force at each punch is absorbed thus eliminating a heavy frame.

Abstract: A force is applied to a tool, such as a strip steel knife, a counter-holder or the like, through a linear pneumatic drive including a pressure expandable hose closed at its ends which expands in a given direction. The hose, a reaction plate and a force output plate extend in parallel to each other and through at least one modular reaction bail form a modular drive unit. Force transmission lever means extending at an angle to said given direction are operatively interposed between the force output plate and the tool for applying the force in a plane extending at an angle or in parallel to said given direction, whereby the compactness and versatility of a cutting apparatus employing such modular drive units is enhanced.

Abstract: An attachment is provided for selectively operating one of a variety of tools for removable attachment to the arm of a backhoe machine from which the bucket has been removed. One of the tools may have a first portion movable with respect to a second portion. Each of the tools are mounted to a rigid bar, any one of which is alternatively insertable into one end of a frame fittable on the backhoe arm. The backhoe includes a hydraulic cylinder disposed along the arm for pivoting the bucket when attached, and the attachment is provided with a sliding member connectable with the end of the cylinder for movement thereby along the attachment frame. A guide member directs the sliding member along the length of the frame. A lever is pivotally attachable at one end to a movable portion of the movable tool, and is pivotally attachable at an opposite end to the sliding member when the tool is secured in place along the frame.

Abstract: Apparatus for cutting a conduit or tubular element transversely to the longitudinal axis thereof which includes a base having a housing projecting vertically therefrom. The housing includes opposed, substantially parallel side plates separated by a vertical slot at their upper ends, and by a mechanism chamber at their lower ends. A blade element is pivotally supported between the parallel side plates, and carries a plurality of ratchet teeth along the lower peripheral edge, and a cutting edge disposed at the opposite side of the blade element from the ratchet teeth. Between the teeth and cutting edge, the knife element has an elongated, arcuate slot formed therethrough. An operating handle is pivotally connected to the housing at a side thereof spaced from the pivotal axis of the blade element. A pawl lever is pivotally connected to the operating handle and has a dog thereon positioned to ride over and operatively engage the ratchet teeth as the operating handle is pivoted.

Abstract: A material engaging apparatus, such as a press brake or shear, has first and second jaw members pivotally mounted together and with coordinating material engaging and working members in the jaw members. An extensible ram positioned along and between the rear sides of the jaw members has one end pivotally mounted to the second jaw member and another end pivotally mounted to a rear end of a lever arm extending from front to rear and spaced adjacent the first jaw member. A front end of the lever arm is pivotally mounted to a front end of the first jaw member. A connecting link extending between the first and second jaw members has a first end pivotally mounted to the lever between the front and rear ends thereof and a second end pivotally mounted to the second jaw member. The connecting link acts as a movable fulcrum for the lever arm and is movable therewith to provide substantially constant leverage as the lever arm moves to urge the first and second jaw members together.

Abstract: A device for trimming a diapositive with trimming angles and punching pins so the diapositive can be exactly positioned within a frame.

Abstract: A chain saw is movably mounted on a frame for enabling the chain saw blade to move in a substantially straight-line path relative to the frame. The frame includes a bed for supporting a length of wood within the straight-line path of the saw blade. The saw blade is biased toward one side of the length of wood and a foot treadle is connected to the saw for overcoming the bias and moving the saw blade along the straight-line path to the other side of the length of wood.

Abstract: A shear for cutting sheet material which functions by pivoting a specially constructed pointed blade about an axis by means of an arm so that the blade pierces into and then cuts the sheet is described as well as the method for its use. The blade is constructed such that it has double cutting edges forming a point wherein the cutting edge towards the pivot axis for the arm is concave and forms the point with the other cutting edge in a shape which approximates a shark's tooth. The blade pierces the sheet when the arm is pivoted towards the sheet and then cuts outward along a square edged surface on a frame supporting the arm away from the place where the sheet was pierced by the point. The shear is particularly adapted for the hand cutting of U shaped building channel to a predetermined length.

Abstract: A microtome for stable production of continuously cut thin sections of a specimen for electronmicroscopic examination by an electromagnetic drive mechanism. Employing a lever hinged so as to swing in a dynamically balanced state, and a specimen holder attached to one end of the lever opposite to a knife, the electromagnetic mechanism drives the other end of the lever so that on every swinging of the lever the specimen is cut by the knife with accurate speed control for continuously cutting. Also, the electromagnetic drive realizes an automated specimen cutting cycle.

Abstract: A cutting tool is provided with a plurality of circular cutting blades of varying predetermined thicknesses to shear sections from rings made of precious metals. Each blade is formed with a notched perimeter to provide a pair of blade cutting edges. The blades are mounted on a spindle for rotation therewith, while the spindle is rotatably mounted in a plurality of cutting blocks which are affixed to a base in an alternating arrangement with the aforesaid blades. The cutting blocks define cutting edges so that rotation of the spindle causes the blade cutting edges formed by the notched perimeter to come into a simultaneous shearing relation with the cutting edges of the two adjacent cutting blocks. Further rotation of the spindle will shear out a section of a ring interposed in the notched perimeter of the blade. The tool is further provided with removable trays to catch sheared pieces of precious metals. Rotation of the spindle is accomplished through a conventional crank handle.

Abstract: A press adapted to operate dies such as tubing cutoff dies through a lightweight ram mounted on a parallelogram linkage for oscillating motion rather than for the usual reciprocating motion on a slide. The ram linkage is operated through a crankshaft and connecting rod by a motor, clutch, brake and flywheel. The machine is compact and uses radial bearings rather than slide bearings to guide the ram. The crankshaft and drive mechanism for the ram linkage is conveniently and accessibly located.

Abstract: A compact chain cutting apparatus for shearing and opening a chain link in one operation. A hand operated hydraulic jack is employed to actuate a pair of shearing members which not only cooperate to cut the link but also bend the severed ends of the link out of alignment to facilitate the removal of the link from those adjacent to it.

Abstract: Apparatus for cutting a conduit or tubular element transversely to the longitudinal axis thereof which includes a base having a housing projecting vertically therefrom. The housing includes opposed, substantially parallel side plates separated by a vertical slot at their upper ends, and by a mechanism chamber at their lower ends. A blade element is pivotally supported between the parallel side plates, and carries a plurality of ratchet teeth along the lower peripheral edge and a cutting edge disposed at the opposite side of the blade element from the ratchet teeth. Between the teeth and cutting edge, the knife element has an elongated, arcuate slot formed therethrough. An operating handle is pivotally connected to the housing at a side thereof spaced from the pivotal axis of the blade element. A pawl lever is pivotally connected to the operating handle and has a dog thereon positioned to ride over and operatively engage the ratchet teeth as the operating handle is pivoted.