Abstract: A momentary contact switch is provided having a toggle actuator with the toggle in a normal center-off position. Two different momentary contacts are achieved by pivoting the toggle in either of two directions from its center-off position to one of two ON positions. The toggle returns to the center-off position by spring bias. The spring bias is essentially equal for either ON position and is achieved with a minimum number of parts for such even bias.

Abstract: Circuitry is described for detecting a waveshape having a change of slope, such as the optical signal wave from a nuclear explosion. The wave is amplitude-sampled at a rate determined by a variable frequency clock pulse generator. Signal pulses indicative of the slope of the wave are generated from the amplitude samples, and a certain number of the most recently generated slope signals are stored in a shift register. Majority logic circuitry, connected to the shift register, generates an output signal when the majority of the slope signals in the shift register changes from a first slope majority to a second slope majority.

Abstract: A coaxial reflex photoelectric scanner comprising first and second lenses, a photoelectric light source and a photodetection device, all mounted within a housing in coaxial relationship with one another. The photodetection device is positioned between the light source and the second lens, wherein the second lens is positioned between the photodetection device and the first lens. The second lens is so positioned that the photodetection device absorbs an optimum quantity of light energy that is reflected back from an object and through the first and second lenses.

Abstract: A seal for a cable connector is provided. The seal is made between a cable extending into an oversize cable clamp housing and the housing itself. The sealing element itself is a generally annular ring of yieldable material such as polymer foam. The sealing element preferably includes three generally triangular sectors some surfaces of which are preferably curved and the sectors are interconnected by webs formed integrally with the sectors. The annular sealing element extends generally about a cable extending into the housing.

Abstract: A rotary drill bit for rock drilling comprising a plurality of cutting elements mounted by interference-fit in recesses in the crown of the drill bit. Each cutting element comprises an elongated pin with a thin layer of polycrystalline diamond bonded to the free end of the pin.

Abstract: A bell and spigot coupling is provided with an abrasive-material insert to increase the disengagement force necessary to uncouple the ducting.

Abstract: An improved annular cutting die for shaving the surface from metal rods or base, having four facets in the outer annular cutting surface thereof.

Abstract: An electrical apparatus enclosed within a housing which contains a replaceable battery, and is provided with means for programming and/or testing by means of connectable electrical contacts with an independent instrument. The electrical apparatus is provided with a composite unit comprising a battery support and an electrical terminal connector which is arranged to cooperate with a single small access port in the apparatus housing whereby routine servicing of battery replacements, programming and/or testing, can be performed through the single port.

Abstract: A cable for the transmission of direct current electricity comprising a multi-layered, resistivity graded polymer insulation, and a method of transmitting direct current electricity therewith.

Abstract: A method of continuously and rapidly effecting a heat induced cure in curable polymeric compositions, such as by cross-linking or vulcanization, by means of directly contacting a surface of the heat curable polymeric composition with a stream of hot gas traveling at very high velocities, and under elevated pressures.

Abstract: A crosslink curable ethylene-propylene rubber composition with improved resistance to heat, the cured rubber composition and electrical conductors insulated with said cured rubber composition. The improved rubber composition comprises a combination of ethylene-propylene rubber, chlorosulfonated polyethylene, zinc oxide, talc and carbon black in particular proportions.

Abstract: This disclosure is of an inverter type power supply including an actively switched damping circuit for limiting voltage transients in the inverter circuitry. Such damping is accomplished by switching an energy absorbing element into parallel circuit relationship with the inverter transformer during periods in which transients normally occur, the energy absorbed during these transients then being either dissipated or stored and later returned to the inverter transformer for improved circuit efficiency.

Abstract: The mending of defective semiconductive components of insulated electrical cable, comprising filling and sealing voids or breaks within a body of semiconductive material with a curable semiconductive patching compound comprising the combination of chlorosulfonated polyethylene, conductive filler and lauroyl peroxide, and heating the patching compound to cure the same.

Abstract: A composite of polymeric materials which are adheringly joined to each other and which can be easily and cleanly separated by stripping apart with a low pulling force whereupon the contacting surfaces of their interface separate cleanly without retention of any residue on one from the other, and which comprises the combination of a previously cured body of a copolymer of ethylene and propylene adjoined to a subsequently cured body of an elastomeric blend of a copolymer of ethylene and propylene admixed with chlorosulfonated polyethylene. The combination of materials is especially advantageous when used in electrically conducting wire and cable constructions as a composite of an electrical insulation and an overlying strippable semiconductive layer.

Abstract: A signal processor is described for pulse-echo systems such as sonar and seismographic systems in which wave energy is transmitted and received as a train of discrete pulses of different frequencies ordered in predetermined sequence. The receiver comprises a plurality of signal processing channels each of which selects one subpulse and delays it through an interval of duration inversely related to its time position in the pulse train, to thus bring the received subpulse signals into time alignment so that when added their summed amplitude constitutes the target signal output. For interference level compensation, a running estimate is made of the interference level in each of the signal processing channels, and the channel signals then are weighted by this interference estimate as an inverse function of its magnitude.

Abstract: A method of compounding thermoplastic polymeric material and fillers, including additives and agents, and unique compounded products. The compounding method comprises mixing the thermoplastic polymeric material in particulate form with particulate filler, and in progressive sequence melting the surface portion of the thermoplastic particles, blending the filler with said molten surface portion of the thermoplastic particles and removing the resultant blended melt and filler from the surface of the thermoplastic particles. The mixing and melting, and the blending and removing, are continued until the filler is substantially assimilated into the polymeric material and the thermoplastic particles become substantially diminished by melting and blending, or the method can be carried further if desired. The compounded product thus prepared is characterized by a distinctive stratified consistency.

Abstract: A method of compounding thermoplastic polymeric material and fillers, including additives and agents, and unique compounded products. The compounding method comprises mixing the thermoplastic polymeric material in particulate form with particulate filler, and in progressive sequence melting the surface portion of the thermoplastic particles, blending the filler with said molten surface portion of the thermoplastic particles and removing the resultant blended melt and filler from the surface of the thermoplastic particles. The mixing and melting, and the blending and removing, are continued until the filler is substantially assimilated into the polymeric material and the thermoplastic particles become substantially diminished by melting and blending, or the method can be carried further if desired. The compounded product thus prepared is characterized by a distinctive stratified consistency.

Abstract: A new and improved magnetic damping system for induction watthour meters including electromagnetically driven disk armatures. The magnetic damping system comprises cobalt-rare earth permanent magnets of relatively small mass deployed in a counterposed pair of unit assemblages each of which is positioned on an opposite side of the driven disk.

Abstract: A sintered porous plaque battery plate comprises an elongated substrate and a sintered porous plaque on both major surfaces thereof. One longitudinal edge of the substrate has a region substantially free of porous plaque for welding a current collector thereto and the other opposed longitudinal edge of the substrate has a transversely tapered porous plaque region on both major surfaces of the plate adjacent and extending longitudinally of the opposed edge for preventing the plaque from chipping along the opposed edge. The method for forming such plates includes the steps of (1) coating a substrate with double and single plate width strips of powdered metal slurry, (2) forming a V-shaped groove longitudinally of each of said double width strips to define a tapered porous plaque region along one edge of each plate, and (3) severing the substrate into strips of plate each with a tapered edge region after the slurry has been sintered into a porous plate.

Abstract: An improved and economical fire retarding system for polymeric compositions comprising the combination of a halogen-containing hydrocarbon and an oxide of iron; a method of rendering polymeric compositions resistant to flame; and the flame resistant polymeric compositions and products comprising the same.