Abstract: In a protective helmet, especially a bicycle helmet, having a head band made of plastic, which is fastened to the helmet calotte and which is height adjustable for adapting to the head anatomy of the wearer, provision is made that the head band is supported on both sides of the helmet calotte so as to be pivotable and that extensions are provided that extend at both end regions of the head band approximately perpendicular to the same toward the top and interior of the helmet, which engage into holding elements that are fixed in the helmet calotte, the extensions being adjustable lengthwise relative to the holding elements.

Abstract: In a protective helmet, especially a bicycle helmet, having a head band made of plastic, which is fastened to the helmet calotte and which is height adjustable for adapting to the head anatomy of the wearer, provision is made that the head band is supported on both sides of the helmet calotte so as to be pivotable and that extensions are provided that extend at both end regions of the head band approximately perpendicular to the same toward the top and interior of the helmet, which engage into holding elements that are fixed in the helmet calotte, the extensions being adjustable lengthwise relative to the holding elements.

Abstract: In a sight piece, in particular for skiing goggles or the like, comprising a distal and a proximal sheet united by a flexible seal and spacer element that encircles along the edge, it is provided that the sheets are glued together by means of the seal and spacer element without the use of additional adhesive.

Abstract: In a sight piece, in particular for skiing goggles or the like, comprising a distal and a proximal sheet united by a flexible seal and spacer element that encircles along the edge, it is provided that the sheets are glued together by means of the seal and spacer element without the use of additional adhesive.

Abstract: In a visor for a helmet, particularly a motorcycle helmet, comprising an outer plastic pane and an inner plastic pane which are held spaced apart relative to one another through a sealing edge under inclusion of an air cushion, provision is made, to attain a simple producibility while avoiding frame parts, for the outer pane to be extruded of plastic and to have edge regions that project toward the inside, into which an inner pane that is punched from a flat, plate-shaped plastic material can be inserted in a form-fitting manner.

Abstract: In a pair of spectacles comprising a spectacle frame and side-pieces laterally articulated to the frame, it is provided that a recess having a cover that is transparent at least outwardly is provided on the frame and/or at least one side-piece, movable decoration elements being disposed in the recess.

Abstract: Flexible magnetic recording media consisting essentially of a web-like nonmagnetic substrate, a magnetic layer applied to one main side of the web-like substrate and a backing layer formed on the opposite main side of the substrate from a polymeric binder, at least one filler, at least one auxiliary pigment and a polyolefin having a spherical particle shape.

Abstract: Disk-shaped magnetic recording media essentially consisting of a flexible substrate, a thin ferromagnetic metal film applied to one or both sides and a protective or antifriction layer present on this metal film and essentially consisting of carbon, a process for the production of these recording media and information stores containing these recording media.

Abstract: Magnetic recording media are produced by preparing a dispersion of anisotropic magnetic materials in solution in an organic binder using dispersants and further conventional additives, applying the dispersion in the form of a layer onto a nonmagnetic substrate and solidifying the applied magnetic layer, by a process in which a cylindrical grinding chamber is used which is provided with an anchor stirrer or helical stirrer and contains grinding media whose specific gravity is lower than that of the magnetic material.

Abstract: A method and an arrangement for reducing wear in magnetic storage means having magnetic disks, in particular having flexible media, become effective when predetermined maximum waiting times of the heads on the same track or the same tracks have elapsed. The heads HD are moved away from the waiting tracks in accordance with the predetermined control scheme, may be moved in waiting areas of the magnetic surface, and are moved back to the waiting position.

Abstract: A pair of glasses with inclinable temples, each temple being articulated pivotally around a swivel bearing on a holder connected to the frame, is designed such that the holder has an approximately plate-like basic body, that a recess open to the inside and backwards is provided in the holder, that a plate-like appendage is integrally provided at the front end of the temple, locking ribs being arranged adjacent to a radial outer edge of this appendage and engaging with corresponding locking ribs adjacent to an inner edge of the recess of the holder, and that a swivel bearing bolt passes through the appendage of the temple and the holder adjacent to its recess, thus achieving an inclination adjustment both technically satisfying and functional, on the one hand, and, on the other hand, an esthetically attractive and fashionable styling.

Abstract: Magnetic recording media consist of a flexible disk-shaped nonmagnetic base, a cobalt/chromium layer applied thereto and suitable for vertical recording, and a friction-reducing layer of amorphous carbon present on this alloy layer.

Abstract: Magnetic recording media, consisting of a non-magnetic base and a magnetic layer firmly bonded thereto, exhibit improved properties in sustained operation if, in the course of their production, a dispersion of inorganic particles in a solvent is applied to the magnetic layer, and the solvent is then removed.

Abstract: Disk-shaped nickel-plated aluminum substrates which are used as bases in the production of magnetic recording disks having a magnetizable metallic layer are surface treated by polishing and texturing.

Abstract: Magnetic recording media consisting of a non-magnetic base and, applied thereto, one or more firmly adhering magnetizable layers based on magnetic material finely dispersed in a polymeric binder, at least one lubricant and further conventional additives, wherein the lubricant used is zinc stearate which has been rendered hydrophilic.

Abstract: A magnetic dispersion which can be applied to a non-magnetic base to produce a recording medium is prepared by dispersing a magnetically anisotropic material in a polymer binder and in an organic solvent by a method wherein the magnetically anisotropic material is worked in a jet mill before and/or during dispersing.

Abstract: A process for the preparation of a magnetic recording medium by dispersing pulverulent magnetic material in a binder mixture which is dissolved in an organic solvent and essentially consists of an elastomeric polyurethane and a high molecular weight hydroxyl-containing polymer, with addition of dispersing assistants and conventional additives, applying a layer of the dispersion, to which a diisocyanate and/or polyisocyanate has first been added, to a base material and the solidifying the layer and crosslinking the binder matrix, wherein the diisocyanate and/or polyisocyanate is added to the dispersion and, before applying the dispersion to the base, from 15 to 55% of the NCO groups present react with the hydroxyl-containing polymer of the binder mixture.

Abstract: Magnetic recording media comprise a non-magnetic base which is provided with a magnetic layer consisting of finely divided anisotropic magnetic material which is dispersible in binders and additives, the binder being a mixture of (1) an OH-containing polyurethane which is crosslinked with polyisocyanates, (2) a high molecular weight thermoplastic linear polyurethane and (3) a polyvinylformal binder, a phenoxy resin, a cellulose ester or a vinyl chloride copolymer.

Abstract: Magnetic recording media comprise a non-magnetic base which is provided with a magnetic layer consisting of finely divided anisotropic magnetic material which is dispersible in binders and additives, the binder being a mixture of (1) a high molecular weight thermoplastic linear polyurethane, (2) a polyvinylformal binder, a phenoxy resin, a cellulose ester or a vinyl chloride copolymer and (3) an OH-containing polyurethane which is crosslinked with polyisocyanates.

Abstract: Magnetic recording media possess, on a dimensionally stable base which may or may not be provided with a non-magnetic lower layer, a thin ferromagnetic metal layer on which a protective layer consisting of a silicon monoxide/chromium dual coating is applied.