Abstract: A multi-component composition suitable for amalgamation with mercury to form a dental amalgam, an amalgam and a method for producing such a multi-component composition. The multi-component composition has: from 30 to 90% (by weight) of a first component containing at least 30% silver, at least 20% tin and at least 10% copper; from 10 to 70% (by weight) of a second component, or alternatively, from 5 to 65% (by weight) of a second component and from 5 to 65% (by weight) of a fourth component, the second and fourth components containing at least 30% silver, at least 20% tin and at least 10% copper; and up to 15% (by weight) of a third component containing silver and/or alloy powder containing at least 80% (by weight) silver. The first component is spherically shaped atomized alloy powder. The second component is mechanically worked atomized alloy powder. The surface area to volume ratio of the powder of the second component is greater than the surface area to volume ratio of the powder of the first component.

Abstract: A process for preparing a consolidated nickel-base superalloy compact suitable for tensile force inducing high strain rate deformation. It includes the steps of: preparing a melt of a nickel-base superalloy in a vacuum; atomizing the melt into powder in a protective atmosphere; collecting the powder; screening the powder to proper size; introducing the powder into a container; evacuating and sealing the container in a vacuum; and consolidating the powder under pressure at a temperature below the solidus temperature of the alloy and at a temperature at which grain boundaries grow past prior particle boundaries.

Abstract: A mixing capsule for mixing a first material with a second material, and in particular, a capsule in which the materials are kept separated and brought together only at the time they are to be mixed. The capsule is characterized by a pierceable partition which separates the materials to be mixed, a projection for piercing the partition and two grooves and a ridge. One of the grooves cooperates with the ridge so as to maintain the projection away from the pierceable partition during storage and transport. The other groove cooperates with the ridge so as to hold the mixing capsule together and prevent leakage once the partition is pierced.

Abstract: A multi-component composition suitable for amalgamation with mercury to form a dental amalgam, an amalgam and a method for producing such a multi-component composition. The multi-component composition has: from 30 to 90% (by weight) of a first component containing at least 30% silver, at least 20% tin and at least 10% copper; from 10 to 70% (by weight) of a second component containing at least 30% silver, at least 20% tin and at least 10% copper; and up to 15% (by weight) of a third component containing silver and/or alloy powder containing at least 80% (by weight) silver. The first component is spherically shaped atomized alloy powder. The second component is mechanically worked atomized alloy powder. The surface area to volume ratio of the powder of the second component is greater than the surface area to volume ratio of the powder of the first component.

Abstract: A dental alloy having, upon amalgamation, a desirable combination of physical properties and both a desirable condense time and carve time. The alloy contains from 48.75 to 50.75% silver, 20.25 to 21.75% copper, 28.25 to 29.25% tin, 0.05 to 0.8% palladium and up to 2.7% of elements selected from the group consisting of zinc, indium, manganese, cadmium, aluminum, gallium, ruthenium and mercury.

Abstract: A process for casting an ingot of pre-alloyed metal from a consumable electrode. It includes the steps of: providing a consumable electrode corresponding to the desired metallurgical composition of the to-be-cast ingot; providing a second electrode; striking an arc between the consumable electrode and the second electrode to melt the consumable electrode and thereby form a molten pool; maintaining the arc between the consumable electrode and the molten pool; rotating or oscillating the consumable electrode about its axis during melting; providing a controlled atmosphere for the melting of the consumable electrode; delivering molten metal into a fluid cooled mold; and withdrawing the ingot from the mold.

Abstract: A process for producing an alloy product of improved ductility from metal powder. It includes the steps of: providing metal powder having at least 5 wt. % of one or more reactive elements from the group consisting of titanium, aluminum, hafnium, niobium, tantalum, vanadium and zirconium; consolidating the powder to an essentially fully dense shape; and progressively melting and solidifying localized areas of the consolidated shape so as to produce a product of improved ductility.

Abstract: A process for manufacturing an atomized amalgamable alloy having mold adaptation characteristics superior to other atomized alloys and comparable or better than those for ad-mixed type alloys (alloys which are mixtures of spherical and irregularly shaped particles), and physical properties comparable to ad-mixed alloys. The process includes the steps of: producing a melt of an amalgamable alloy; atomizing the alloy so as to form particles which are primarily irregular in shape; collecting the particles; drying the particles; mechanically working the particles so as to fracture and change their shape; classifying the particles to finer than 53 microns; heat treating the particles; and reducing oxides from the surface of the particles.

Abstract: A gamma prime strengthened nickel-base alloy characterized by a highly desirable combination of stress rupture life, hot corrosion resistance, oxidation resistance, phase stability and ductility. The alloy contains from 14 to 18% chromium, from 0.3 to 3% molybdenum, from 4 to 8% tungsten, from 0.01 to 1.0% vanadium, from 3.5 to 5.5% aluminum, from 1 to 4% titanium, from 3 to 7% cobalt, from 0.01 to 0.05% carbon and from 0.035 to 0.1% boron.

Abstract: An ear protecting device for protecting a wearer from annoying and/or damaging noise levels. The device is comprised of a connecting member and a pair of muffs suitable for covering a wearer's ears. The muffs are suspended from opposite portions of the connecting member. The muffs are each comprised of a cup and an earseal cushion. The muffs are characterized by greater attenuation in high intensity environments than in low intensity environments. Each muff has a cup which is at least partially porous. Each muff has a specific airflow resistance of from between 3,000 and 105,000 SI rayls. At least one porous portion of each cup defines a tortuous path. The mean pore size of this porous portion is at least 160 micrometers.

Abstract: A powder metallurgical process for producing a wrought product characterized by a low level of residual impurities. The process comprises the steps of: comminuting metal powder to effect a reduction in particle size, at least 60% of the comminuted particles being capable of passing through a -270 mesh Tyler screen; blending the metal powder with a softer metal-bearing powder; heating the blended powder particles at an elevated temperature, the particles adhering and forming a mass during heating; crushing the mass of powder particles; cold-isostatically pressing the crushed mass of powder; sintering the powder in the absence of an encapsulating member under conditions which effect a reduction in the nitrogen, oxygen and carbon levels of the powder; and hot working the sintered powder into a wrought product. The wrought product has less than 0.015% carbon.

Abstract: A process for producing a wrought product of improved ductility from substantially noncompactible prealloyed metal powder. The process comprises the steps of: comminuting substantially noncompactible prealloyed metal powder so as to flatten the particles thereof; heating the comminuted particles of metal powder at an elevated temperature, the particles adhering and forming a mass during heating; crushing the mass of metal powder; compacting the crushed mass of metal powder; sintering the metal powder; and hot working the metal powder into a wrought product. The wrought product has a chemistry which is substantially the same, with the exception of carbon and certain residuals, as the chemistry of the prealloyed powder.

Abstract: A high temperature oxidation resistant alloy. The alloy consists essentially of, by weight, from 14 to 18% chromium, from 4 to 6% aluminum, from 1.5 to 8% iron, a small but effective yttrium content not exceeding 0.04%, up to 12% cobalt, up to 1% manganese, up to 1% molybdenum, up to 1% silicon, up to 0.25% carbon, up to 0.03% boron, up to 1% tungsten, up to 1% tantalum, up to 0.5% titanium, up to 0.5% hafnium, up to 0.5% rhenium, up to 0.04% of elements from the group consisting of elements 57 through 71 of the periodic table of the elements, balance essentially nickel. The nickel plus the cobalt content is at least 66%. The iron content is in accordance with the relationship, Fe .gtoreq.3+4 (%Al-5), when the aluminum content is at least 5%.

Abstract: An ear protecting device for protecting a wearer from annoying and/or damaging noise levels. The device is comprised of a connecting member and a pair of muffs suitable for covering a wearer's ears. The muffs are suspended from opposite portions of the connecting member. The muffs are permeable to water vapor. Each said muff is at least partially porous. Each said muff has a specific airflow resistance of at least 15,000 SI rayls. Each said muff has a permeance of at least 2 metric perms.

Abstract: A process for producing a copper beryllium alloy. The process includes the steps of: preparing a copper beryllium melt; casting the melt; hot working the cast copper beryllium; annealing the copper beryllium; cold working the annealed copper beryllium; and hardening the copper beryllium; and is characterized by the improvement comprising the steps of: solution annealing the cold worked copper beryllium at a temperature of from 1275.degree. (691.degree.) to 1375.degree. F. (746.degree. C.); hardening the annealed copper beryllium at a temperature of from 400.degree. (204.degree.) to 580.degree. F. (304.degree. C.); cold rolling the hardened copper beryllium; and stress relief annealing the cold worked copper beryllium at a temperature of from 400.degree. (204.degree.) to 700.degree. F. (371.degree. C.).An alloy consisting essentially of, in weight percent, from 0.4 to 2.5% beryllium, up to 3.5% of material from the group consisting of cobalt and nickel, up to 0.

Abstract: A pregnant liquor is mixed with an organic mixture comprised of an organic extracting agent and iso-butyl-heptyl ketone. Metallic values are absorbed from the pregnant liquor by the organic mixture. The metal-bearing organic mixture is then separated from the liquor and stripped of its metallic values.

Abstract: A process for producing formed copper beryllium alloys. The process includes the steps of: preparing a copper beryllium melt; casting the melt; hot working the cast copper beryllium; solution annealing the copper beryllium; optionally cold working the solution annealed copper beryllium; forming the copper beryllium; and age hardening the formed copper beryllium; and the improvement comprising the step of preaging the solution annealed or solution annealed and cold worked copper beryllium, prior to forming, at a temperature of from 400.degree. to 1000.degree. F. for a period of up to 180 seconds, the copper beryllium being at final gauge prior to preaging.

Abstract: Self-cleaning apparatus for removing material from a rotating drum. Buckets are associated with a scraper which is maintained in a substantially fixed position relative to the local gravitational force vector. The scraper is maintained in said position by means of a counterweight. A scraping action is achieved as the drum and buckets rotate.

Abstract: A wear-resistant alloy, which excluding impurities, has the following composition: (a) about 50 to 70% of cobalt, nickel and iron; (b) 27 to 35% of chromium; (c) 5 to 15% of molybdenum and/or tungsten; (d) 0.3 to 2.25% of carbon and/or boron; (e) 0 to 3% of silicon and/or manganese; (f) 0 to 5% of one or more of titanium, hafnium, zirconium, vanadium, niobium, and tantalum; (g) 0 to 5% of copper, and (h) 0 to 5% of one or more of the following rare earths: lanthanum, cerium, yttrium, and thorium. The cobalt is the range 25 to 40%, and the nickel in the range 4 to 12%. There is from 0 to 7.5% of constituents (f), (g) and (h). The iron is present in a quantity not exceeding 25%. If there is 2% or more of carbon and/or boron, there is more than 30% chromium. (All percentages by weight).A welding or surfacing consumable which (ignoring the effect of dilution by substrate) is capable of depositing such an alloy may also be made.

Abstract: A practice device for use in the practice of those sports involving the hurling or striking of a ball or other sport projectile toward a specified target. The device of the invention serves to safely arrest the flight of the projectile while informing the user of the exact point of impact of the projectile relative to a defined target zone. The target is a polymeric foam mat having a polymeric sheet bonded to its front face. The sheet removably carries target indicia. Apertures through the foam mat make up 40 to 50 percent of the total surface area of the mat. When a projectile strikes the sheet, an indentation, which lasts from 5 to 60 seconds, indicates the point of impact.