Abstract: A regulator comprising two limiting members in the form of a blanked and bent tongue of a lug and of a detachable part serving as a pin or key, respectively. Part of the side surface of the tongue bent at a 90.degree. angle projects to form a banking. The detachable limiting member, which can be rotatingly adjusted about its axis, is fitted in the entrance opening of a cut-out portion and includes a projecting edge constituting the other banking. The two bankings are visible from above between the side surface of the bent tongue and the entrance opening of the cut-out portion so that the regulation of the beat of the balance-spring can be checked under a microscope.

Abstract: Driving mechanism for a calendar watch mechanism including indicia of day and date, a display window and means to advance said day and date indicia to said window, characterized by a calendar wheel which makes one revolution each 24 hours, a drive element on that wheel, a rapid advance member, a cocking element, the rapid advance member being elastically acted on and having a ramp which cooperates with the cocking element to control the rotation of the calendar wheel.

Abstract: This invention relates to the identification of wrist watches of the type which are mass produced. It comprises stamping a matrix of identifying indicia in the bottom of a concavity underneath but visible through the felloe of the balance.

Abstract: A watch movement is disclosed which is capable of being equipped either with or without a calendar mechanism without the need for structural modification of the movement. The setting lever spring of the unit is formed by a linear arm of the guard plate and provided with a head having a front and rear edge each with two opposite ramps arranged to cooperate with a pin to fix the spring in a different position depending on whether or not the movement is to be equipped with a calendar mechanism.

Abstract: An automatic winding device for a watch movement includes two frame elements secured to one another to form a unit. The elements support between them a gear train, a pinion, a winding weight integral with the pinion, a lever, a wheel borne by the lever and meshing with the pinion, and a click cooperating with a gear of the gear train. A hairpin strip-spring has one end which acts on the click and another end which acts on the lever. One of the frame elements comprises an elongated recess and the other of the frame elements comprises a notch having edges partially covering the recess. The hairpin strip-spring is inserted in the recess through the notch. The lever and the click are not subjected to the action of the hairpin strip-spring assembly.

Abstract: This invention relates to a process for the manufacture of a workpiece with a visible highly invariable surface characterized by the manufacture of a casting by sintering a mixture of powdered metal of one of at least one of the metals of the groups 4A, 5A and 6A of the periodic system of elements and a binding agent derived from one of at least one of the metals of the groups 1B and 8 of the periodic system; forming the casting to bring it in the definitive shape, finishing the face to be made invariable and submitting the thus obtained workpiece to heat-treatment for hardening it.

Abstract: This invention relates to a winding and setting mechanism for watch movements having a frame, the mechanism comprising a minute-wheel, a ratchet-wheel, a rotating control stem adapted to effect a movement of translation between at least two axial positions of setting and winding, respectively, a setting-lever pivotable upon the movement of translation of the control stem, a setting-wheel adapted to drive the minute-wheel when the stem is in the setting position, and a crown-wheel slidingly mounted for engagement with or disengagement from the ratchet-wheel according to the direction of rotation of the stem when the latter is in the winding position.

Abstract: This invention relates to a driving device for mechanical timepiece movements, the device comprising a barrel-drum, a barrel-bridge, an arbor coaxial with the drum and pivoting in the bridge, a toothed ratchet-wheel secured to the arbor and disposed adjacent to the bridge, and a one-piece click comprising a rigid portion rotatable about the arbor between a locking position and an unlocking position, a resilient arm, and a beak disposed at a free end of the arm, the beak being adapted for engagement in the toothing of the ratchet-wheel.