Abstract: Coolants with increased activity against corrosion of aluminium and aluminium alloys and with improved storage stability, and corresponding coolant concentrates, are useful.

Abstract: Novel aqueous coolants with improved temperature stability contain (A) water; (B) at least one alkylene glycol, alkylene glycol monoalkyl ether, or glycerol; (C) at least one phosphate, carbonate, and/or sulfate in the form of its free acids or its salts; (D) at least one hard water stabilizer; and optionally, further inhibitors and typical coolant constituents. The aqueous coolants are useful, for example, in internal combustion engines.

Abstract: An electrical connector that has a housing including a connecting interface adapted to connect with a mating electrical connector. A plurality of first contacts are coupled to the connecting interface. Each of the first contacts include opposite first and second end sections, and a plurality of second contacts coupled to the connecting interface. Each of the second contacts include opposite first and second end sections. The first end sections of the first contacts being axially aligned with the first end sections of the second contacts, and the second end sections of the first contacts being laterally offset from the second end sections of the second contacts.

Abstract: The concave reflector of a solar-ray heating apparatus is supported on a vertical post by an arcuate rod fixed to the center of the reflector, on its concave side and disposed on a circular arc centered about the focal point of the reflector. This arcuate rod is slidably received in openings of the post and is self-locking in any setting, the focal point of the reflector always remaining coincident with a plate at the top of the post for supporting an object to be heated.