Abstract: An improved flying cut-off machine is disclosed of the type in which a ram is supported for swinging movement induced by a ram actuating mechanism so as to operate a cut-off die set to cut off lengths from an elongated workpiece continuously emanating from a tubing mill. The improvement comprises the provision of an adjustment member included in the ram actuating mechanism which is interposed between connecting rod end members, one of which is pivotally connected to a motor driven crank and the other pivotally connected to the swinging ram. The adjustment member comprises a shaft having oppositely threaded ends threaded into the connecting rod ends so that a length adjustment can be made to the connecting rod, which in turn provides a simultaneous adjustability feature to both the vertical stroke and shut height of the ram produced by the crank rotation so as to adapt the apparatus to variously configured die sets having differing shut heights and strokes.

Abstract: A microwave/millimeterwave oscillator includes a transferred electron device adapted to operate at a first frequency. The device is housed in a waveguide transmission line in a quarter wavelength, quasi-radial mode cavity dimensioned to enable the device to oscillate at a second frequency, higher then the first frequency.

Abstract: A runout table for receiving severed lengths of tubing or other workpieces emanating from cutoff presses and discharging the severed lengths laterally on either side of the table. The runout table features pivoted Vee sides which are independently dropped to discharge the severed lengths on either side of the runout table. The pivoting movement is carried out by means of rocker shafts extending down the length of the runout table on either side, equipped with linkages spaced along the length thereof and connected to the respective Vee sides. The rocker shafts serve to provide support of the table Vee sides to prevent sagging of the Vee sides. A pair of power cylinder assemblies operate the rocker shafts acting against adjustable fixed stops which enable quick adjustment of the Vee angle to accommodate tubing of various diameters. An auxiliary cylinder is provided for either side, overcoming dead center conditions in the linkages upon initiation of a pivoting cycle.

Abstract: A microwave detector comprises a tapered ridged horn that terminates in a ridged waveguide formed with a slot extending through a broad wall of the waveguide and through the ridge that accommodates a stripline positioned so that a pair of diodes are connected across the gap between the ridge and the broad wall and brought out through stepped conductors dimensioned to function as low pass filters.

Abstract: A tubing cutoff die having a horizontally moving scarfing blade and a vertically moving cutoff blade. The tubing being cut off is held in clamping jaws movably mounted on the lower die shoe of the die and actuated by a cam extending from the upper die shoe. The scarfing blade is also mounted for horizontal reciprocation on the lower shoe and actuated by another cam fixed to the upper shoe. The cutoff blade is mounted on the upper die shoe. The two die shoes are reciprocably connected by post and bushing arrangements. There are three of these disposed so that the centerlines are at three of the corners of a rectangle. One of the clamping jaws is mounted on a holder reciprocably mounted on the lower die shoe and the other jaw is mounted on a second holder reciprocably mounted on the first holder. The mounting for the cutoff block provides for either of two rigidly located positions, for different tubing sizes, and the scarfing blade is also adjustable.

Abstract: A cut-off die set is disclosed for use in a cut-off apparatus of the type in which continuous length of tubing or other elongated stock emanating from a tubing mill is severed into lengths as the tubing emanates from the tubing mill by means of a cut-off die set mounted within the cut-off apparatus. The cut-off die set is adapted to be clamped to the tube so as to move therewith during severing of the tubing by a ram operated cut-off blade descending vertically to shear the tubing. The present disclosure involves a improvement to a notching mechanism often included in such cut-off apparatus in which a horizontally reciprocated blade notches the upper portion of the tubing just prior to severing by the main cut-off blade so as to eliminate dimples in the severed tube cross section.

Abstract: A tube cutoff apparatus of the shear knife type is provided with an improved knife holder to reduce the likelihood of fracture. The knife holder and the tube clamping jaws are formed to provide a nesting relationship at the full cut position which increases the blade penetration depth without sacrificing blade support.

Abstract: An I-beam section traveling from the apparatus in which it is fabricated is cut on the fly by a die set or shear which is moved with the I-beam. The cut is effected by a stepped blade having a leading cutting edge and a trailing cutting edge, the latter being in the same plane but laterally offset from the former. The cut proceeds at a 45.degree. angle to the plane of the web and flanges. The leading edge enters the I-beam at the middle of the web and cuts the remainder of the web and the lower flange. The trailing blade edge engages the margin of the upper flange and cuts through this flange and the remainder of the web. The cutting blade is mounted on a reciprocable upper shoe and the I-beam is fed through structure mounted on the lower shoe which has an opening for the I-beam to pass with considerable clearance. Inserts mounted on the lower shoe underlie the web and flanges of the I-beam to support the beam during the cut.

Abstract: A tubing cutoff die having a horizontally moving scarfing blade and a vertically moving cutoff blade. The tubing being cut off is held in clamping jaws movably mounted on the lower die shoe of the die and actuated by a cam extending from the upper die shoe. The scarfing blade is also mounted for horizontal reciprocation on the lower shoe and actuated by another cam fixed to the upper shoe. The cutoff blade is mounted on the upper die shoe. The two die shoes are reciprocably connected by post and bushing arrangements. There are three of these disposed so that the centerlines are at three of the corners of a rectangle. One of the clamping jaws is mounted on a holder reciprocably mounted on the lower die shoe and the other jaw is mounted on a second holder reciprocably mounted on the first holder. The mounting for the cutoff block provides for either of two rigidly located positions, for different tubing sizes, and the scarfing blade is also adjustable.

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 method for manufacturing die jaw inserts for tube cutoff apparatus. The method comprises the steps of fabricating a pair of die jaw blanks; finish processing the blanks; and subsequently forming the clamping aperture by means of electrical discharge machining of the die jaw insert. An apparatus for performing the method is disclosed.

Abstract: A tubing cutoff die having a horizontally moving scarfing blade and a vertically moving cutoff blade. The tubing being cut off is held in clamping jaws movably mounted on the lower die shoe of the die and actuated by a cam extending from the upper die shoe. The scarfing blade is also mounted for horizontal reciprocation on the lower shoe and actuated by another cam fixed to the upper shoe. The cutoff blade is mounted on the upper die shoe. The two die shoes are reciprocably connected by post and bushing arrangements. There are three of these disposed so that the centerlines are at three of the corners of a rectangle. One of the clamping jaws is mounted on a holder reciprocably mounted on the lower die shoe and the other jaw is mounted on a second holder reciprocably mounted on the first holder. The mounting for the cutoff block provides for either of two rigidly located positions, for different tubing sizes, and the scarfing blade is also adjustable.