Abstract: A cutter insert is provided which is adapted to be supported on a flat platform on a cutter body and abutting edgewise against walls upstanding from said platform. The insert comprises a flat block of cutting material in the geometric shape of a parallelogram having a hole extending therethrough between the upper surface and the mounting surface of the block to receive a screw for securing the block to the platform. The upper surface of the block terminates at opposite ends in radii. The cutter insert further includes a rake face and a clearance face on opposite sides of the hole with said upper surface and said faces constituting cutting edges defined by the intersections of said faces and said upper surface, and an angular facet at diagonally opposed ends of said radii so as to form a chip splitter at the juncture of the cutting edge of the rake face and the cutting edge of the angular facet.

Abstract: In a high resolution optical electronic imaging system to detect defects and dimensional changes in articles of manufacture for example, metal cutting tool inserts, a convergent blade-shaped laser light beam emitted by a laser passes through a focusing optical system and is then directed to a revolving head which contains a mirror system. The focusing and mirror system scans the apex of the blade beam along the cutting edges of an insert so that edge defects and dimensional changes cause reflection and refraction of the laser beam. High resolution and contrast television camera and optic system receives the reflections and refractions and creates an image of the device with sharply contrasted defects.

Abstract: The present invention provides a drilling tool having a shank and at least one pair of identical cutting inserts, the inserts having an octagonal shape having alternate equal obtuse angles. Each of the inserts is arranged such that they each have a different radial displacement from the turning axis of the drill, the inner insert having a cutting path which overlaps the turning axis of the drill and the next outer insert having a cutting path which overlaps the cutting path of the inner insert. The cutting path of each insert is formed by the cutting edges either side of the obtuse angles of the insert.

Abstract: Cobalt cemented carbide cutting inserts are prepared for coating with a hard, wear-resistant coating by providing a cobalt enriched zone on a surface to be coated. Cobalt enrichment is effectuated by means of nitrogen gas contact with the carbide followed by a period of vacuum sintering during its sintering process of manufacture.

Abstract: Metal working tools or tool holders having a body with flat-faced surface containing insert pockets with at least two indexable inserts in each pocket are described. A tapered wedge block is positioned between each pair of inserts to wedge the inserts against the walls of the insert pocket and to separate the pair of inserts from each other. The pair of inserts have parallel cutting edges facing the leading wall. In one preferred embodiment, a pair of indexable cutter inserts are positioned in each pocket of a plural pocket face mill body. The inserts are positioned in leading and trailing positions with an intermediate wedge block to provide parallel cutting surfaces in the same direction.

Abstract: An indexable disposable insert is described having eight contiguous edge faces of equal length and two octagonal side faces having alternate corners with equal obtuse angles, cutting edges being formed at the junction of at least one of the octagonal side faces and each of the eight contiguous edge faces. Four identical pairs of cutting edges of equal length arranged about an obtuse angle are provided. The obtuse angles which may vary in the range 135.degree. to 170.degree. but are preferably 160.degree.. The insert can have chip breakers applied to it.

Abstract: Capacitor foil is passed between a lateral fluted roller and a backing plate to produce a rectangular foil strip having a closely spaced array of parrallel flutes transversely thereof, with part of the flute depth being impressed into the metal and part being due to the bonding of the metal to form the flutes.

Abstract: A thin polypropylene film with improved surface impregnation properties for dielectric fluids is disclosed. The film has one predetermined textured surface consisting essentially of fibroids intertwined and overlapping, and coextensive and uniform over its continuous length and is characterized by a space factor of above about 5%.

Abstract: A double metallized paper electrode and polypropylene film dielectric capacitor is preferably impregnated with a blend of a single chemical compound fluid such as phenyl xylyl ethane or mono isopropyl biphenyl and an ester liquid for improved electrical characteristics.

Abstract: A thin polypropylene film with improved surface impregnation properties for dielectric fluids is disclosed. The film has one predetermined textured surface consisting essentially of fibroids intertwined and overlapping, and coextensive and uniform over its continuous length and is characterized by a space factor of above about 5%.

Abstract: A clip for electrical conductors comprises a generally rectangular metal strip with piercing tangs projecting from each end. The strip is folded into a triangular configuration which is used to encircle the conductors. At the apex the piercing tangs are folded inwardly and abut each other. An anvil tool at the apex forces the tangs to penetrate the conductors while the tangs support each other in abutting relationship and there enter a central aperture in the base of the clip for a clinching action.

Abstract: An improved process of producing a predetermined textured surface on a polypropylene film is disclosed including the steps of extruding the polypropylene into a stalk, cooling the stalk to crystallize the polypropylene, passing the stalk through a heating zone and biaxially stretching the stalk into a thin film. The stalk emanating from the extruder has a section primarily temperature controlled and correlated to the stalk velocity to cause extensive, continuous and uniform spherulite formation with a predominantly type III polypropylene crystal structure on the outer surface of the stalk, which upon subsequent inflation of the stalk causes the desired texture to occur.

Abstract: In a biaxial blown tube synthetic resin film making apparatus, the extruder die, mandrel, the reheat ovens, and a hot air ring are caused to rotate and oscillate about a stalk moving coaxially therethrough to provide an improved flatter and more uniform film.

Abstract: A metallized polypropylene film with improved surface impregnation properties for dielectric fluids is disclosed. The film has one predetermined textured surface and is characterized by a space factor of above about 5% and has an electrical conductive metallic coating on one surface.

Abstract: An electrical capacitor casing has a fluid filling hole sealed with a self sealing device. The sealing device includes a seat for the seal on the inside of the casing and adjacent of the opening, a resilient gasket, a biasing spring and a retaining housing to form an enclosure for the gasket and spring. A key is used to open the sealing device for drying and filling the case.

Abstract: A medium high voltage capacitor roll section comprises a sheet of double metallized plastic film and a sheet of paper adjacent thereto, with the paper and film forming parallel dielectrics. A dielectric liquid impregnant is used and the roll is wound sufficiently tightly so that after impregnation with a dielectric liquid impregnant and consequent swelling there is an essentially zero negative space factor within the roll.

Abstract: An improved power capacitor dielectric system utilizes the combination of electrode foils having a raised dimple pattern on their surfaces, and only polypropylene film as the dielectric, the polypropylene film having a texture pattern on one surface.

Abstract: A thin polypropylene dielectric strip with a low density highly porous non-self supporting layer of super fine polypropylene fibers adhering thereto is disclosed. The strip is useful as an electrical capacitor dielectric and may be metallized as a capacitor electrode.

Abstract: A wound AC capacitor is made of resin strips with the electrodes being metal films on resin strips. The capacitor is wound on a hard core and is partially impregnated with a non-halogenated liquid.