A regulator-assembly for a timepiece in which the regulator has a catch engaged in the groove of a tangential screw threaded in the frame of the clockwork in such a way that the angular position of the regulator is modified by rotating the screw, characterized by the fact that the catch is constituted by a thin elastic tongue urged, by its own elasticity, to apply itself against the bottom of the groove, the two terminal faces of the groove being frustoconical and opening towards the outside, the width of the bottom of the groove being less than that of the tongue, so that the tongue bears simultaneously on both frustoconical surfaces, wherefore the displacements of the screw, when they are carried out alternately in one direction and in the other, produce corresponding displacements of the regulator, without idle running.
Balance wheel adjusting apparatus for a timepiece characterized by an adjusting lever which elastically engages an inclined surface on a regulating spindle. The inclined surface on the regulating spindle is inclined at an acute angle in relation to a swivel axis of the adjusting lever and this swivel axis generally coincides with the axis of the balance wheel.
A precision regulating device for the regulator pointer of a timepiece includes a balance cock and an index regulator mounted on the balance cock such that the index regulator is pivotable about a regulator axis. A hairspring key arranged on the index regulator at a radial distance from the regulator axis allows changing the active length of a hairspring of the oscillating system of the timepiece in response to pivoting of the index regulator. The index regulator also includes a radially directed regulator pointer. A counterpressure spring including a resilient arm has one end region fastened on the balance cock and another free end region arranged so that it forces the regulator pointer, under prestressing, in the pivoting direction and holds it in abutment against a regulating screw arranged in a rotatable manner in a threaded bore of the balance cock or a component connected to the balance cock. The resilient arm has a holding-down region which can be positioned on an axial side of the regulator pointer relative to the regulator axis.
