Abstract: A monoallylamine-diallylamine derivative copolymer with a high degree of polymerization can be obtained in a high yield by using a radical initiator containing an azo group and a group having cationic nitrogen atom in the molecule.

Abstract: Intraocular lens for implantation in the posterior chamber of an eye, following extracapsular removal of the natural eye lens, including a lens assembly having an anterior surface formation and a posterior surface formation, at least a portion of the posterior surface formation constituting a planar contact region adapted to be seated against the adjacent planar tissue surface of the posterior capsule to form a connection interface for permanent anchoring of the lens assembly thereat, the contact region being provided with a roughened surface area defined by a series of ordered narrow linear depressions therein extending generally transversely of the plane of the contact region, for accelerated adhesion of the tissue of the adjacent posterior capsule part to the depressions and enhanced anchoring of the lens assembly to the posterior capsule part, to prevent dislodgment of the implanted intraocular lens.

Abstract: An auxiliary spotting optical system for binoculars and telescopes includes an auxiliary objective lens proximate the principal objective lens, a principal magnification system field of view indicator and an image transfer arrangement between the field of view indicator and the ocular lens of the binocular to bridge the optical gap created between the image plane of the auxiliary objective lens and the focal plane of the ocular lens to create an optical system delivering a 1.times. magnification to an observer with normal eyesight. A movable mirror in the optical path of the principal magnification system and the spotting system determines which optical system is active. In its first position the mirror directs light passing through the auxiliary objective lens, the field of view indicator, the image transfer arrangement to the ocular lens, and blocks the principal magnification optical path.

Abstract: A flexible bulk container comprises a side wall structure having an outer wall (10) and an inner wall (11) lying within and closely adjacent to the outer wall. A base closes a lower open end of the side wall structure. A plurality of lifting loops are provided at the upper end of the side wall structure, each lifting loop having a first end that is connected to or integral with the outer wall (10) and a second end that is connected to or integral with the inner wall (11).

Abstract: The present invention relates to a vapor phase process for the production of N-alkyl and N,N-dialkylaniline by alkylation of aniline with an alcohol, preferably methanol and ethanol, in the presence of a ZSM-5 catalyst. A modified ZSM-5 catalyst has the advantage of high selectivity for N-alkylation while suppressing the formation of undesired by-products, such as toluidines. The molar ratio of silica to alumina in the catalyst is from about 20:1 to 700:1 and preferably from about 30:1 to 200:1. The silica-alumina may be modified with alkali metal, alkali earth metal or transition metal ions, preferably cesium, potassium, magnesium and iron, to form the finished catalyst. The reactants are contacted in the presence of the catalyst at a temperature of from about 300.degree. to 500.degree. C., at a pressure of from about 1 to 3 atmospheres, and at a molar ratio of alcohol to aniline of from about 1 to 6. The feed rates expressed as weight hourly space velocity (g feed/g catalyst/hour) are broadly from about 0.

Abstract: A vacuum device comprising a by-pass fan pump, a conduit connecting the inlet of the pump to a member in which pressure is to be reduced and a flow passage formation enabling a stream of air to enter the pump and to by-pass the member. In a preferred embodiment the inlet to the by-pass fan pump is connected to the outlet of a Venturi pump and the member is connected to the exhaust inlet of the Venturi pump. The device is directed particularly to the replacement of air by preserving gases in the packaging of foodstuffs.

Abstract: An apparatus and method for mapping the cornea is described. The apparatus comprises a probe having a multiplicity of parallel pins bundled together which are reciprocally movable with respect to one another. The pins are maintained in parallel and slidable relationship with one another and, after the leading end of the pins is urged against the surface of the cornea so that the ends thereof form a surface mirroring the contour of the cornea, the pins may be locked together in fixed relationship. A detector is used to sense the relative position of the pins, the sensed positions are stored, and the stored values used to depict the contour of the cornea on a two-dimensional surface such as a display terminal or as hard copy on paper. A computer is used to obtain the data from the detecting means, to store the data, and, by means of an appropriate algorithm, to graphically generate the two-dimensional image.

Abstract: A valve for use primarily for dispensing liquids from non-reusable containers comprising a conduit formed by bonding a flexible sheet of thermoplastic material to a second sheet of resilient thermoplastics material. The second sheet is of a springy nature and is provided with a shoulder portion directed to the first sheet. The shoulder portion positioned adjacent to a deformable member formed into the second sheet. The conduit is closed by the first sheet being stretched tightly over the shoulder. However by deforming the deformable member towards the first sheet the latter is raised from the shoulder thereby opening the conduit.

Abstract: An aqueous solution containing at least an amido-phosphazene compound and an acid catalyst is applied to a fabric comprising cellulosic fibers so that said amido-phosphazene compound adheres to the fabric in an amount of 1-10% by weight of the fabric and then thus treated fabric is subjected to drying, curing and soaping, thereby obtaining a fabric having soft hand and low in shrinkage after repeated washings which contains less than 6% of amido-phosphazene and less than 10 .mu./g of free formaldehyde and is less than 4% in shrinkage after washings of 45 times.

Abstract: A safety braking device for a roll up or sliding door having a door curtain guided for movement by guide channels engaging its edges, the safety braking device comprising a tilt bar hingedly attached to the leading edge of the door curtain, and brake means carried on the tilt bar and arranged, upon appreciable tilting movement of the tilt bar, to frictionally engage with the door curtain guide channels for braking the movement of the door.

Abstract: A fuse for an alternating current power circuit. The fuse comprises an input terminal (4), a first contact (5) electrically connected to the input terminal, an output terminal (9) and a second contact (8) electrically connected to the output terminal. A fusible element (11) electrically connects the first and second contacts and completes a normal electrical path between the input and output terminals. An arcing contact (6) is positioned in relation to the first contact (5) so as to form a potential arc path between the first contact and the arcing contact, along which path an arc will become established after the fusible element breaks in response to fault current. The arcing contact (6) is electrically connected to a third terminal (41) and is electrically isolated from the output terminal (9).

Abstract: Lens forceps and method of use thereof for extractive removal from the interior of an eye through a corneal incision of a surgically severed segmental lens fragment, the forceps contemplating a manually manipulatable eye lens size clamp of two relatively longitudinally movable parts, including a scoop part having a handle provided with a crescent shaped scoop extending therefrom and defining an upwardly open receiving trough of conforming size and shape to the profile of such a fragment for receiving the fragment therein, and a cover part having a handle provided with a cover extending therefrom, the parts being arranged for manually controlled relative longitudinal movement therebetween and, in one position of such movement, for manually controlled removable stationary engagement of the handles and corresponding positioning of the cover over the scoop to form therewith a cage to retain the fragment for permitting removal thereof from the eye through the corneal incision.

Abstract: Instruments for use in the surgical implanation of a knee prosthesis including a femoral alignment rod for insertion into the medulla of a femur through an access hole located between the femoral condyles. The rod is resiliently deformable so that once the rod is fully inserted within the medulla the portion of the rod located within the medulla contacts the inner walls of the bone defining the medulla and is thus caused to bend. The access hole through which the rod is inserted is sufficiently larger than the diameter of the rod so as to impose no physical constraint on the rod for allowing the portion of the rod which protrudes from the access hole to extend linearly along an axis the position of which is determined by points of contact within the medulla between the rod and the inner walls of the medulla.

Abstract: Liquid sampling apparatus for sampling liquid at a controlled depth within the tanks of an ocean going oil tanker comprises a sampling chamber having outwardly opening inlet and outlet valves. The inlet valve 114 is arranged to be actuated by a projecting valve actuator 132 through a lever mechanism and is adjustable by means of a spring clip 136 so as to permit sampling at varying distances from the bottom of the tank. The outlet valve is a pressure-relieving ball valve 138 permitting automatic escape of air during filling of the sampling chamber, but preventing entry of liquid. The apparatus is lowered in use through an MMC stand on a wire carried by a support 140 at the top of the apparatus.

Abstract: A microporous membrane suitable for use in microfiltration. The membrane is a hydrophilic skinless sheet, formed of polytetramethylene adipamide, either alone, or in admixture with at least one other polyamide.

Abstract: Anti-twist signholder support assembly, formed of a male insert, connectable to an overlying signholder, and having an upper horizontal multi-sided anti-twist plate, and a lower lock formation of diametrically arranged resilient catch fingers, and a mating female socket having a platform containing an upper horizontal multi-sided anti-twist recess of shape corresponding to plate and sized for receiving the plate, and a lower slot formation of arrangement and shape corresponding to the lock formation and sized for receiving the lock formation, such that the insert is alternatively coaxially insertable in the socket with the lock formation in the slot formation in more than one interchangeable relative angular rotational position, and such that in any alternative insertion position the recess will engage stationarily the plate for providing an anti-twist connection therebetween in which all external rotational forces about the axes acting on the insert will be transmitted directly by the plate to the recess rem

Abstract: A filter assembly (1) comprises a fluid tight housing (6, 7). First and second coupling means (10 and 11) are provided on the housing, each coupling means providing adjacent flow channels into the housing. A filter element is located within the housing, the element having a fluid tight external wall (20) and a filter medium (19) housed within the wall. A first flow path is established between the first and second coupling means through the filter element, while a second flow path between the first and second coupling means is established within the housing but outside the external wall of the filter element.

Abstract: With the object of providing a glass run channel which can accommodate the curvature in both front elevation and plan, and also some degree of twisting, in this invention a glass run channel comprises a metal core of general S shape, the metal core having a continuous unbroken strip and a plurality of transversely extending slits forming between them bars or ribs extending transversely from the unbroken strip, the core being covered with an elastomer.

Abstract: A display unit comprising a light source, a beam splitter, e.g. in the form of a sheet of titanium coated glass, a layer of retroreflective material, a clear shelf and a flexible stencil so arranged that, in use, light passes through the stencil from the light source and is reflected by the beam splitter, e.g. titanium coated glass, onto the retroreflective screen. The layer of retroreflective material diverts the incident light, e.g. through 180 degrees, so that when a user looks towards the retroreflective material the image appears suspended in space. The stencil is larger than the clear shelf and consequently has an undulant surface which causes the image itself to be undulant and appear in three dimensions. A cranked shaft is attached to the stencil and is rotated by a motor. As the shaft rotates, the undulations in the flexible stencil alter, thereby causing the image to move.

Abstract: A joint prosthesis for use in long bone joint replacement comprises a tapering stem 4 upon which is located a collar 10 chosen from a range of similar collars having different internal diameters. The collar chosen locates with the stem at a particular height, depending on the internal diameter of the collar and the tapering of the stem.