Abstract: There is disclosed a portable instrument including an optical device (4; 5; 6) for measuring a physiological quantity, particularly the heart rhythm, and data emission and/or reception means, the optical device including at least one light source (41; 51; 61) for subjecting a portion of an organic tissue (10) to a light emission and at least one photoreceptor (42; 52, 53, 54; 62, 64, 66) for detecting the intensity of the light emission after propagation in the organic tissue. The optical device also forms the data emission and/or reception means, said at least one light source and/or said at least one photoreceptor being arranged for respectively emitting data to an external unit or receiving data from said external unit.

Abstract: The invention concerns a watch with a striking work including a bottom plate and a gong including two ends, the gong being secured via a first end to the bottom plate. According to the invention, the second end of the gong is also secured to said bottom plate.

Abstract: The invention concerns a method of marking an article using a laser emitting radiation of wavelength ?, the article being formed of a material that is slightly absorbent at said wavelength ?, characterized in that it includes the following main steps: taking a support formed of a metal that is highly absorbent at wavelength ? and capable of converting at least in part the light energy absorbed into thermal energy, arranging the article directly against the support so as to form a sufficient thermal contact between the article and the support to transfer the thermal energy from the support to the article, the article being inserted between the laser and the support, locally illuminating said support through said article in conditions able to generate, at the surface of the support, sufficient thermal energy for the thermal energy transfer from the support to the article to produce on the surface of the article a local physical or chemical transformation resulting in a contrast at the origin of the marking.

Abstract: The invention concerns a watch including a case fitted with a glass and containing display means able to be observed through the glass, characterised in that said glass is made from a plate formed of a fibre optic group.

Abstract: There is disclosed a portable instrument including an optical device (4; 5; 6) for measuring a physiological quantity, particularly the heart rhythm, and data emission and/or reception means, the optical device including at least one light source (41; 51; 61) for subjecting a portion of an organic tissue (10) to a light emission and at least one photoreceptor (42; 52, 53, 54; 62, 64, 66) for detecting the intensity of the light emission after propagation in the organic tissue. The optical device also forms the data emission and/or reception means, said at least one light source and/or said at least one photoreceptor being arranged for respectively emitting data to an external unit or receiving data from said external unit.