The shell of a hearing aid has an open end with a mating surface. The mating surface mates with a non-planar faceplate. Advantageously, the faceplate is shaped as a part of a sphere. Further advantageously, the surface is shaped by grinding.

COMPOSITIONS USED IN PERMANENT STRUCTURE ALTERING OF HAIR A composition comprising an aqueous preparation on the basis of keratin softening, which contains as a swelling and penetration agent, an N-alkyl pyrrolidone having 5 to 7 membered heterocyclic ring and between 8 and 22 carbon atoms in the N-alkyl group. The composition is less damaging to the skin and hair than composition known in the pri...

A novel cross-linked polymer is obtained by cross-linking polyvinyl alcohol with a cross-linking agent which is a mixture of a phenolic component and an aldehyde or a mixture of a naphtholic component and an aldehyde. The resulting polymer is exceptionally thermally stable and, therefore, can be used as an effective permeability control agent in all enhanced oil recovery operations, including stea...

An insert for a shoe sole is provided which includes a strip made of an elastic material disposed between an outer sole portion and an upper sole portion of the sole of a shoe. The strip extends from the outer heel area of the shoe to the border of the large toe area of the shoe. The strip forms a rocker bottom which cradles the first metatarsal head of the foot of the wearer. The roll point of th...

A composite rubber sheet material and a sport shoe including a composite rubber sheet material includes a sponge rubber sheet and a mesh cloth having a percentage of voids in the range of 15 to 75%. The mesh cloth is inset in one side surface of the sponge rubber sheet to a depth ranging from 5 to 75% of the thickness of the mesh cloth for enhancing the stability, durability, bendability and flexi...

A swimming pool cover apparatus is described whereby the pool cover may be extended and retracted through a power source. The apparatus includes a drive shaft circumscribed by a pair of sleeves. Each of the sleeves may be selectively rotated through a double-dog clutch system connected to the drive shaft. A cover-collecting drum is connected to one of the sleeves. A pair of cord-collecting reels r...

Excavating apparatus and methods for breaking and removing material away from an upright face of material are disclosed. The apparatus employs a rotary cutter for dislodging material from the face. A collector pan extends transversely across the front end of the apparatus. The cutter is elevationally movable relative to the collector pan in both longitudinal and elevational directions above and be...

A vibrating wire strain meter has a steel proving ring across the bore of which extends a taut wire. The outer surface of the proving ring has sloping or tapered grooves extending axially along the entire length of the ring. A pair of diametrically opposed wedges sloping at the same angle as the grooves are used to wedge the proving ring in a borehole. The tapered grooves provide positive guiding ...

A vertical window covering system which utilizes an area of prepleated drapery fabric having permanently set pleats of a nature such that the fabric behaves like a tension spring tending to bias pleats toward the foled state or a vertical blind with taped or string ladders. The drape is hung from a traverse track adapted to be mounted in a horizontal orientation. A plurality of track mounting arra...

Molten metal is poured in an open top basin that communicates via a sprue with a cavity or expendable pattern in a mold to fill the cavity and partially fill the basin. After the casting metal has solidified through the gating that connects the sprue to the cavity, a tapered heat transfer member is introduced into the molten metal in the basin. A cooling medium is passed through the heat transfer ...

Compositions and methods are used for reducing the permeability of high fluid permeability segments of underground strata, the compositions being injected into the high permeability segments in liquid form and there gelled to reduce the permeability of the segments. A first group of compositions has a pH of at least 4 and comprises a sulfited derivative of a tannin extract together with furfural, ...

Particles are fed for sorting by a radial distributor having an upper surface on which the particles gradually spread arcuately and are displaced radially outwardly, by for example vibration of the distributor, to a lip of the upper surface where they define one or more curved arrays as the fall over the lip. As they fall in free flight trajectory paths the particles present a curved array one par...

A cylinder having a bore extending therethrough is formed with pairs of slits arranged axially of the cylinder at a predetermined spacing, the slits in each pair being opposed to each other diametrically of the cylinder. Like a coiled spring, the cylinder is adapted to perform a spring action against tension, compression or torsion.

An apparatus for processing particulates comprises a vibratory bed including a motor with a vertically disposed shaft, separate remotely adjustable vibratory generating apparatus mounted on each end portion of the shaft and at least three contact structures between the vibratory bed and a flask or vessel containing the particulates. The uppermost vibratory generating apparatus being remotely adjus...

A coupling device suitable for connecting an externally splined power take-off stub shaft to a corresponding internally splined yoke with a universal joint. The coupling mechanism includes an automatic release to the locked position and locks axially onto the shaft by way of locking balls. A collar with flexible tabs is manually rotatable to the unlocked position and is triggered to rotate to the ...

An apparatus and method are disclosed for removing the dross ridges which are formed on the lower surface of a metal workpiece during torch cutting of the workpiece. The apparatus includes a cutting blade having a generally flat outer surface and a cutting edge along each of its two opposite sides. The blade is positioned to extend across and below the workpiece path of travel, and the blade is ro...

A catalyst for denitrizing nitrogen oxides contained in waste gases, which comprises: (a) titanium, and (b) at least one base metal selected from the group consisting of V, W, Mo, Mn, Cu, Fe, Cr, Co, Ni, Zn and Sn, the catalyst containing titanium and the base metals in amounts of at least about 50% by weight in terms of oxides based on the catalyst, and titanium in amounts of about 80-99% by weig...

Polymers are obtained by polymerization of water-soluble monomers which contain one or more polymerizable olefinic double bonds and a quaternary nitrogen atom which is substituted by one or more hydroxyalkyl groups and are present in the form of halide-free salts, with or without further comonomers.

In a process for recovery N-methyl-2-pyrrolidone from a liquid aqueous medium (preferably a brine) by liquid-liquid extraction, the improvement comprises using a branched aliphatic C5-C7 alcohol as extractant. In a particular embodiment, the liquid aqueous medium is an effluent from a poly(arylene sulfide) process.

A splice case for a telecommunications cable splice comprises first and second parts that are held together by springs that function also to deform surfaces of the parts to put a sealing material therein under compression. The splice case may contain a conductor organizer.