Abstract: A device for measuring the dust content of an air stream includes a supply line having an inlet opening for supplying the air stream toward a measuring chamber for measuring the dust content. An adjustable flow rate pump is configured for suctioning the air stream toward the measuring chamber. A first measuring system is configured for measuring the velocity, temperature, pressure, and moisture content of the air stream at the inlet opening. A second measuring system is configured for measuring the flow rate, temperature, pressure, and moisture content of the air stream in the measuring chamber. A third measuring system is configured for measuring the dust content in the measuring chamber.

Abstract: A device for measuring the dust content of an air stream includes a supply line having an inlet opening for supplying the air stream toward a measuring chamber for measuring the dust content. An adjustable flow rate pump is configured for suctioning the air stream toward the measuring chamber. A first measuring system is configured for measuring the velocity, temperature, pressure, and moisture content of the air stream at the inlet opening. A second measuring system is configured for measuring the flow rate, temperature, pressure, and moisture content of the air stream in the measuring chamber. A third measuring system is configured for measuring the dust content in the measuring chamber.

Abstract: The sports spectacles comprise a lens-carrying frame (10) with an upper cross-member (11) including two branches (11a, 11b) extending symmetrically from a central portion (12) towards respective opposite free ends (13a, 13b) and, on the outer side (8) of each branch, there is a surface (18) with a helical profile extending from a rim (19) for the attachment of the corresponding lens (L), with the helix facing so as to deflect an air-flow striking the corresponding lens (L) towards the respective free end (13a, 13b).

Abstract: Eyeglasses of the type which permit interchanging of framed lenses are disclosed which employ a lens assembly including a pair of lenses mounted in a frame. The frame, in turn, is releasably mounted to a backing support which supports the upper portion of the frame and includes a retaining clip pivotally mounted between an open position permitting easy mounting of the lens assembly, and a second closed position which maintains engagement between the lens and backing assemblies.

Abstract: The present invention is directed to a composite, integral polymeric spectacle part. The spectacle part includes a first polymer member and a second polymer member. The polymer members are selected to provide desired characteristics for the spectacle part at the location of the spectacle part where the member is incorporated. In a particular embodiment, it is desirable that the first polymeric member be formed from an elastomeric polymer and that the second member be a substantially rigid polymer. The rigid polymer is preferably formed from a thermosetting polymer having a higher melting temperature than the first elastomeric member. The second rigid member is bound to the first polymer member by heat fusion during an injection molding process.In the method of the invention for forming a composite, integral, polymeric spectacle part, a first polymer member is formed into a shape conforming to a portion of the cavity of an injection mold.

Abstract: Ski goggles are provided having circuitry for heating the lens by means of at least one solar cell held by the headband of the goggles to prevent or eliminate fogging and condensation on the surface of the lens of the goggles facing the wearer.

Abstract: An eyeglass assembly includes a pair of lenses with surrounding lens frames interconnected by bridges joining the lens frames together and cooperating therewith to form an opening for receiving a portion of the wearer's nose. Support means are provided on each lens frame below the bridge for engaging the wearer's nose for additional support. The nose supports include first and second legs formed from a unitary strip of resilient material bent at its mid-portion so that the two legs extend in generally the same direction from an intermediate fold portion. The two legs are resiliently movable toward and away from each other, and a first leg is joined to the lens frame so as to be resiliently movable with respect thereto. The legs may extend in generally upward or downward directions, that is, generally toward and away from the bridge member. The second legs are located adjacent the nose-receiving opening and carry nose-engaging surfaces.

Abstract: An eyeglass frame includes ring-like lens mounting portions joined together by a bridge defining a medial cavity. A nose engaging piece has nose engaging pad portions joined together by an intermediate bight portion and also includes means for biasing the nose pad portions away from each other. A pair of opposed hinged arms are interconnected by interlocking hinge members disposed in the medial cavity of the bridge member and free ends of the arms are engaged with the nose engaging pad portions. Deflection of one nose pad portion results in a similar, complementary deflection of the other nose pad portion, thus providing a conformance to the shape of a wearer's nose which, in combination with the bias force of the saddle piece, provide a greatly improved wearing comfort.