Abstract: An apparatus for melt-spinning a polymer such as a polyamide or polyester has a heating jacket provided with a cavity which accommodates a spinning assembly. Preferably, the spinning assembly is exchangeable in the jacket from above and includes a housing adapted to contain a molten polymer and a spinnerette plate near one end thereof. The opposite end of the housing is closed with a lid which extends partially within the housing and partially outside the housing. That portion of the lid which extends outside the housing has a peripheral surface which slopes radially outwardly from the wall of the housing in the direction moving longitudinally from the housing. In a cylindrical vessel the sloping portion of the lid is frusto-conically shaped. The jacket is provided with a portion of gradually increasing diameter to accommodate the lid.

Abstract: A cultivating implement or rotary harrow has two groups of soil working members mounted on upwardly extending shafts that extend transverse to the direction of operative travel. The groups of soil working members are adjustably linked to an elongated frame of the harrow and the front of the longer side of the frame has a coupling member for connection to the rear of a prime mover for soil working operation. One of the shorter sides has a second coupling member that can be coupled to the prime mover during transport. Pairs of ground wheels at the front and rear of the frame are employed to support the harrow both in operative and in transport positions. Each group of soil working members has a supporting rear roller and arms that extend from the front of the frame over the roller to support a tool bar to which seed drills, for instance, can be connected.

Abstract: Diphenylmethoxyethylamines of the general formula ##STR1## in which R.sub.1 represents a fluorine, bromine or chlorine atom, R.sub.2 represents a hydrogen or fluorine atom and R.sub.3 represents a hydrogen, fluorine or chlorine atom, with the provisos that R.sub.3 is a hydrogen atom when R.sub.2 is a fluorine atom, R.sub.1 is a fluorine atom when R.sub.3 is a chlorine atom and R.sub.1 is a fluorine or bromine atom when R.sub.2 and R.sub.3 both are hydrogen atoms, and their non-toxic acid addition salts are disclosed. The compounds have dopaminergic properties and their use is indicated for treating the Parkinson syndrome. Compositions for such use are disclosed.

Abstract: A photographic material suited for forming color radiographs, which material comprises on both sides of a film support at least one silver halide emulsion layer incorporating at least one color coupler that is capable of forming with an oxidized p-phenylenediamine type color developing agent a dye, said color coupler(s) being present in an amount sufficient to allow by exposure and color development with a p-phenylene diamine type developing agent to obtain a spectral density in the material of at least 2.0 with respect to visual filter light, the aggregate amount of silver halide in said material being equivalent to an amount of silver nitrate in the range of 5 g to 1.3 g of silver nitrate per sq.m, the silver halide grain size distribution being such that at least 50% by weight of the silver halide at both sides of the support has a mean grain size smaller than 0.55 .mu.m.

Abstract: An improved method of and apparatus for pressure casting metal are disclosed. The method is generally known in the art as "squeeze casting". The present method provides for casting articles under forging pressures in a die to predetermined dimensions regardless of varying amounts of excess of poured molten metal, by the inclusion of a retractable charge-quantity compensator positioned adjacent the casting cavity to form on the cast article an extension which may vary in volume from article to article. The extension is later removed. The charge-quantity compensator may be in the form of a piston in a cylinder with hydraulic fluid behind the piston connected to a hydraulic source. The piston, which may be normally biased toward the die cavity but yieldable away therefrom is fixed in position when the punch die has advanced to a predetermined position at which the quantity of casting material in the die cavity is appropriate for the article being formed. Full casting pressure is then applied.

Abstract: A diving board comprising a layer extending over its full length, at least one of its upper and lower surfaces being provided with thin sheets of reinforcing material, said sheets having different lengths, the lengths of said sheets diminishing from the front and the rear ends of the diving board to a portion of said diving board lying between its both ends, which portion is destined for resting on a support of said diving board. The diving board has a light primary layer to take up part of the total bending force thereon with at least an upper or lower surface with reinforcing material provided so that the amount of reinforcing material is substantially adapted to the moment acting in each cross-section of the diving board.BACKGROUND OF THE INVENTIONThe present invention relates to a diving board for a swimming pool, said driving board being of the cantilever type having its rear end attached to a stationary support and resting on a fulcrum at a place between its front and rear ends.

Abstract: Disclosed is a slow release fertilizer composition comprising a slack wax-urea adduct prepared by urea-dewaxing petroleum hydrocarbons in which the wax to urea ratio ranges from 0.08 to 0.30 and particularly intended for use on dry, desert-like soils. Solar radiation causes the wax to melt thereby slowly releasing the urea with the wax forming a biodegradable protective layer against wind erosion and water losses.

Abstract: A method for making a dimensionally-stable shaped article (comprising at least one one layer of asbestos paper treated with a mineral acid selected from sulfuric acid, hydrochloric acid and phosphoric acid), including placing the treated asbestos paper sheet on a mould in a substantially pressureless manner and then allowing it to dry at normal room temperature.

Abstract: A process is described for the hardening of a protein-aceous layer or layers, more especially of gelatin layers, e.g. gelatin layers in a photographic material, by the application on this layer or layers of a coating composition comprising a low molecular weight, fast-acting, carboxyl group-activating hardening agent in combination with a film-forming, hydrophilic, polymeric, fast-acting hardening agent carrying one or more carboxyl group-activating substituents.

Abstract: In a coating method for preparing a multi-layer material for use in the graphic arts or in X-ray photography in which a web of a polyester film support has applied to one of its sides to form an anchoring layer an aqueous binder latex containing at least one copolymer of vinyl chloride, vinylidene chloride, acrylic or methacrylic acid esters, vinyl esters, or butadiene, the anchoring layer is heated during drying or heat-setting to a temperature above the glass transition temperature of said copolymeric binder and is conveyed while hot by means of conveying rollers contacting said anchoring layer surface, and at least one gelatin-containing hydrophilic layer is applied to the anchoring layer, the tendency of said anchoring layer to adhere while hot to said conveying rollers or to a contiguous anchoring layer is reduced by incorporating an organo-silane compound in the anchoring layer in the amount of about 5-100% by weight of the copolymer binder.

Abstract: Polyureas containing phosphorus are prepared by the reaction of a diisocyanate or a diisothiocyanate with a diamine. In a typical reaction, phenyl bispiperazidophosphate is reacted with tolylene -2,4-diisocyanate to yield a polyurea product which may be cast into a non-burning, flexible film.

Abstract: A tufting machine having multi-color selection capability in which an improved selection means enables the selection of one of a plurality of yarns which upon selection is pneumatically transported to a tufting station where a bit-length of yarn is severed and tufted to a backing layer. The selection process comprises individual selection band-like members which, upon selection by solenoid means, engage with an oscillating shaft from which said band-like members extend tangentially. The band-like members are connected to elements which are used to engage yarn and which feed, meter and pull back such yarn when they are driven by the oscillatory shaft.

Abstract: A tractor drawn cultivator comprises a frame extending transversely to the direction of movement of the tractor. A plurality of spaced apart vertical axis rotary driven cultivator members comprising downwardly extending tines are supported from the frame. Surrounding each cultivating member and suspended from the frame is a screen having two spaced apart side walls and an interconnecting rear wall. The side walls have forwardly and outwardly diverging front parts with rearwardly and downwardly extending leading edges. At least a portion of the rear wall is vertically adjustable to control the rate of soil release from the screen. A tool bar to the rear of the main frame may support a plurality of ridging bodies, one behind each cultivator member.

Abstract: Method and apparatus for transporting lengths of film in a camera, particularly for taking pictures from a fluorescent screen, such as an X-ray screen.Using a single motor, the rate of transport is made independent of the rate of exposure, thereby allowing for maximum exposure times, permitting low radiation intensities.

Abstract: A hardening fiber composition for use in the processing of photographic silver halide elements is described which contains a 1-hydroxy-alkylidene diphosphonic acid the alkylidene group of which contains from 2 to 5 C-atoms.

Abstract: Novel azetidine derivatives of the formula ##STR1## wherein R.sub.1 is an acylamido group, R.sub.2 is selected from the group consisting of ##STR2## wherein R.sub.4, R.sub.5 and R.sub.6 are individually selected from the group consisting of hydrogen, lower alkyl and lower alkenyl, n is 2 or 3 and -- in the case when formula IIB is a phenyl -- this group may carry 1 to 4 substituents selected from the group consisting of halogen, lower alkyl, lower alkenyl and phenyl, and R.sub.3 is lower alkyl optionally substituted with 1 or 2 phenyls which phenyl groups may be substituted with nitro and a process for their preparation and process for the preparation of cephalosporanic acid derivatives using the azetidines of formula I as intermediates.This is a division of Serial No. 547,948, filed Feb. 7, 1975 now Pat. No. 4,007,202.

Abstract: Alkylatable aromatic hydrocarbons are alkylated with olefins and alkylhalides under anhydrous alkylating conditions in the presence of certain metallic cation exchanged synthetic hectorite-type catalysts in which the metallic cation has a Pauling electronegativity greater than 1.0 and in which the central octahedral layer contains one or more divalent metals which have an ionic radius not greater than 0.75 A. In a specific embodiment, 1-dodecene is reacted with benzene by contacting the dodecene and benzene under anhydrous alkylating conditions in the liquid phase at the boiling point of the mixture with a catalyst comprising a metallic cation such as Al.sup.3+, In.sup.3+, and Cr.sup.3+ exchanged onto the surface of a synthetic nickeliferous hectorite.

Abstract: Method of collecting light-weight substance floating on a liquid surface, for example, oil floating on water, said light-weight substance being carried into a collecting reservoir, in that on the outer side of a wall of the collecting reservoir extending below the liquid surface, away from the liquid surface, a down-stream is produced by which the light-weight substance with liquid is passed beneath an edge of the wall located beneath the liquid surface and into the collecting reservoir, after which the light-weight substance rises up in the reservoir to the liquid surface, where it is collected, while the liquid is conducted away through at least one outlet near the bottom side of the collecting reservoir.

Abstract: An apparatus for unloading radiographic cassettes under daylight conditions comprises an inclined tunnel-shaped body which may be mounted at the front side of a processing machine. Within the tunnel-shaped body an automatic unlocking mechanism is provided which unlocks and opens the cassette to be unloaded so that the film falls out of the opened cassette under the force of gravity and is presented at the entrance slot of the processing machine in order to undergo the required chemical treatment.

Abstract: Optimal body weight distribution and excellent sacro-lumbar support are provided by a chair which changes configuration automatically to support the body in any sitting posture. The chair seat is mounted on a pair of laterally spaced-apart, elongated, substantially parallel seat supports disposed lengthwise of the chair, and the seat has sleeves that are received telescopically on the seat supports for sliding movement such that the seat slides forward and backward, relative to the chair back. The back tilts independently of the seat to conform to the sitting posture of a person sitting in the chair. The chair has arms that are shaped and dimensioned to interlock adjacent chairs for ganging.