A semipermeable hollow fiber membrane (10) consists of a first layer (12) for selectively permeating only water and water soluble substances therethrough and excluding the permeation of hydrocarbon fluids and a second layer (14) covalently bonded to the first layer (12), the second layer (14) being selective permeable only to water soluble substances and excluding water permeation therethrough. Th...

PURPOSE:To prevent poor adherence between an active material and a grating by containing in a container an unformed electrode plate whose grating is charged with active material paste and then ripening it. CONSTITUTION:Unformed electrode plates 1 are contained in a container for ripening. Ripening is carried out as stirring the air in the container while supply ing air in the container at a rate o...

Apparatus for more efficiently pre-cooking and peeling cold water shrimp such as the species Pandalus borealis is disclosed. The apparatus includes a conveyor for moving the shell-on or unpeeled shrimp up and out of a feeder tank. A perforated horizontal conveyor then carries the shrimp over a steam manifold with a multiplicity of apertures such that steam escapes from the manifold and rises throu...

A binding for retaining a boot on a ski. The binding is provided with a jaw for retaining one end of a boot against the ski, and a support on which the jaw is mounted. The support itself is connected to two arms mounted on the ski. These two arms are separated by a distance less than the width of a sole of the boot which the binding retains on the ski.

The process is disclosed for the manufacture of briquettes in which an essentially solid fuel material such as hard coal, coke, soft coal, charcoal or more particularly, anthracite, and other coals of low volatility are mixed in the presence of polyvinyl alcohol and calcium oxide and/or magnesium oxide, as well as at least 1 percent by weight of water, and formed into briquettes. The calcium oxide...

In a process for producing polyurethane foam by allowing a reaction mixture comprising at least one polyisocyanate component and at least one polyfunctional active hydrogen component to react, a compound selected from the group consisting of oxynitrate salts of metals of Group IV B of the Mendeleef periodic table, is employed as a cell opening additive. Such oxynitrate salts are also effective to ...

A form creating system providing a free access to a form to be created through the whole process from its first or design step to its final or manufacturing step. In this system, the position of a third point and the direction of a third straight line are first decided in accordance with the positions of first and second points as well as the directions of the first and second lines, and then such...

A digital multiplier circuit which implements a modified multiplier algorithm in binary form and can be implemented as a very large scale integrated circuit. The modified algorithm replaces the large summation required in a typical shift-and-add digital multiplier with the sum of smaller summation terms, both yielding the same product. The digital word representing one of the multiplicands is part...

A clock signal produced by a master oscillator is monitored continuously by a detector circuit having a local oscillator which is stabilized in frequency by injection of the master clock signal. The master clock signal is first divided and the divided clock signal is then retimed by the stabilized lock clock signal. The retimed, divided clock signal is then shifted by one complete clock cycle. If ...

Oriented polyester film primer coated with a hydrolyzed aminosilane IS disclosed. The aminosilanes in the unhydrolyzed state have the formula: (R<1>)aSi(R<2>)b(R<3>)c wherein R<1> is a functional group with at least one primary amino group; R<2> is a hydrolyzeable group such as a lower alkoxy group, an acetoxy group, or a halide; and R<3> is a nonreactive, nonhydrolyzeable group such as a lower a...

Oriented polyester film primer coated with a hydrolyzed aminosilane IS disclosed. The aminosilanes in the unhydrolyzed state have the formula: (R<1>)aSi(R<2>)b(R<3>)c wherein R<1> is a functional group with at least one primary amino group; R<2> is a hydrolyzeable group such as a lower alkoxy group, an acetoxy group, or a halide; and R<3> is a nonreactive, nonhydrolyzeable group such as a lower a...

A sit up exercise bar is employed to add resistance for sit up exercises, and positions the subject's hands and arms so as to produce a fluent motion, reducing stresses on the lower back. The sit up bar has yoke form of a pair of aligned straight sections and a central neck bow which curves behind the subject's neck. A pair of handles extend forward from the respective straight sections. These pos...

A method of manufacturing a lightweight building element comprises providing a lightweight aggregate of particles having diameters in the range of 2 mm to 20 mm, mixing the particles together to produce graduated particle size distribution of the mixture, adding a quicksetting binder to the mixture in a predetermined amount sufficiently small so that free spaces are produced between the particles ...

A process for producing a polydiacetylene molecular orientated film is disclosed, which comprises a first step of forming a polydiacetylene film on a base using a diacetylene monomer or a polydiacetylene, a second step of unidirectionally rubbing the polydiacetylene film with a cloth a least once, a third step of building up a diacetylene monomer on the film, and a fourth step of polymerizing the ...

Damage tolerant composites comprising high strength filaments in the form of bundles or tows of continuous fiber and a tough phase separated, crosslinked epoxy resin matrix are disclosed. The crosslinked epoxy resin matrix comprises infusible particles made from a rubber polymer that reside primarily between plies of the composite and critically have a median particle size between 10-75 microns. P...

Porous cross-linked polyvinyl alcohol particles which is used for a chromatographic medium is prepared by: dispersing an aqueous solution of a mixture of polyvinyl alcohol and a salt in an organic solvent; allowing a gel to form spontaneously from the dispersion; and reacting the gel with a cross-linking agent.

A control system for a vehicle engine comprises a first detecting device for detecting a controlled variable on an accelerator, an engine ouput adjusting device, such as a throttle valve, a second detecting device for detecting a situation wherein a vehicle employing therein the vehicle engine is in a travelling condition of traffic jam, and a control device for controlling the engine output adjus...

A surgical cutting blade for use in an electrosurgical scalpel includes a thin flat ceramic substrate having a rounded tip where the edge portion of the substrate on the opposed major surfaces thereof are beveled. A pattern of metallization is provided on the opposed major surfaces of the blade substrate with the metallization extending over the tapered portions. The substrate is then back-ground ...

An improved well structure to be installed within a wellhead housing 10 having an internal landing seat 14 and an internal support groove 20 above the landing seat has a hanger 16 with an internal bore and an external landing shoulder 18. The hanger is positioned within the housing so that the hanger landing shoulder lands on and transmits hanger loads to the housing landing seat. A blowout preven...

Hitherto, heat distortion resistant foams based on polyphenylene oxide and a vinylaromatic compound have been prepared by polymerising the vinylaromatic compound in the presence of polyphenylene oxide. The finished polymer blend is then granulated, mixed with the blowing agent in the extruder and subsequently expanded. This process is complex and expensive. In the process according to the inventio...