Abstract: A vinylsulphone compound of the formula ##STR1## is provided. This compound is useful as cross-linking agent for hydrophilic colloids, especially for gelatin which is in the form of layers of photographic materials.

Abstract: The present invention relates to a process for crosslinking hydrophilic materials by means of a triazine compound of the formula ##STR1## The process is preferably used for crosslinking gelatin in photographic material.

Abstract: A low profile, low center of gravity walking aid cane construction with a central support member having its lower end rigidly connected to four legs. The four legs each have a body portion and a foot portion with the body portions positioned generally transverse to the support member and with the foot portions of the legs depending downwardly from the outer ends of the body portions for contact with a supporting surface. The extremities of the foot portions lie in a plane that is generally transverse to the support member and the extremities are positioned generally at the corners of a rectangle within this plane. The inner legs which terminate at the inner corners of the rectangle are shorter than the legs which terminate at the outer corners and support means provide support for supported lengths of the body portions of the legs. The support means is shaped and positioned to provide unsupported lengths of the body portions of the legs which have a substantially equal resistance to bending forces.

Abstract: The present invention relates to a process for crosslinking hydrophilic colloids, preferably gelatine and most preferably gelatine present in a photographic material. A 1,3,5-triazine compound containing an NC--N.sup.- -- substituent bound to the triazine ring is incorporated into the hydrophilic colloid as a crosslinking agent.

Abstract: Thermoplastic resins with good balance of physical properties are prepared by a two stage bulk or bulk-suspension polymerization process, using as reinforcing rubber a combination of a high 1,4-content polydiolefin and a polymer of a diolefin having a high percentage of the diolefin units in the 1,2-configuration.

Abstract: The present invention relates to the production of hardened gelatin layers by means of quaternary carbamoyl pyridinium compounds. Preferably this method is used for the hardening of silver halide photographic material.

Abstract: This invention relates to the hardening of gelatin layers. The gelatin is heated with an aqueous solution of a 2-halogeno pyridinium compound.

Abstract: A collapsible walker in which gate legs are each pivotally mounted in bearings positioned at either end of a cross brace with the gate legs mounted in the bearings for rotation between an open position with the gate legs positioned generally transversely of the cross brace and a collapsed position with the gate legs folded against the cross brace. Corner braces are positioned adjacent to the bearings to provide rigid bracing support between the gate legs and the cross brace when the gate legs are in an open position, with the corner braces being movable to permit rotation of the gate legs to a collapsed position.Detent means are provided with tab release means therefor.The movement of the corner braces during movement of the gate legs may be determined by guide slots. Frictional means may be provided to resist opening or closing of movement of the gate legs.