Abstract: The mechanism avoids the rate variations due to the effect of gravitation on a regulating organ of a timepiece whose regulating organ includes a sprung balance and an escape wheel mounted onto a platform. The platform includes an unbalance and is mounted so as to freely rotate about at least a first axis relative to a plate of the movement so that this platform will rotate about the first axis under the effect of terrestrial gravitation. This mechanism includes a wheelwork with a driving kinematical chain linking the escape wheel to a barrel system of the timepiece, and a corrective kinematical chain compensating the movements and speed of the platform relative to the plate, so that these movements of the platform will not perturb the chronometry of the timepiece, this wheelwork including one or several epicycloidal gear trains, each of which contains wheels with straight toothing exclusively.
Abstract: A tool facilitates the insertion and removal of an ink reservoir unit, such as a cartridge, from a chamber of a writing instrument. The chamber is located within a drum that is coupled to a nib of the writing instrument. The tool comprises a main section defining, at least in part, an internal cavity for receiving the nib. The tool is configurable in a closed state, in which the nib is positioned inside the cavity and the tool clutches a grip portion of the writing instrument that is rigidly coupled to the nib and the drum. The tool is further configurable in an open state in which the cavity is partially open, compared to when the tool is in the closed state, thereby facilitating safe placement of the nib inside the cavity.