A one-piece regulator key for watch movements includes two spaced apart prongs projecting from and integral with a common support, each prong has an inward plane surface facing and substantially parallel to a like inward plane surface on the other prong and is provided at its free end with an inwardly projecting protuberance for decreasing the spacing between the prongs at their free ends.

A regulating mechanism for a watch is provided with a stud holder pivotably mounted under the guide of the outer circumference of the regulating mechanism, the stud holder being provided with a shallow slot on the arm thereof and the regulator having a thin outer circumference inserted in the aforesaid slot and turning under the guide of the circumference of the stud holder, the outer circumference of the slot the outer circumference of the stud holder and the inner circumference of the slot hav...

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.

In a watch having a balance spring and a balance cock, apparatus is provided for fastening the free end of the spring to the cock. The fastening apparatus includes a bearing block, pivotally mounted on the cock, having a generally vertically extending bearing surface for engagement with the spring. A resilient clamping member is mounted on the cock and includes a clamping arm positioned in spaced relation to the bearing surface to define a space therebetween which receives the free end of the ba...

A fine-adjustment device for watch-movement regulator-assemblies, comprising a control organ pivoting on a balance-cock and provided with an eccentric functioning together with a regulator-tail; wherein the control organ comprises a finger-piece extending towards the regulator axis within a cut-out which is laterally open on one of the sides of the regulator-tail, that the regulator tail is provided with a hub located on a fixed component fastened to the cock and compressed by an adjustable regu...

A horological device with a conventional balance wheel assembly, supporting bridge and hairspring with an adjustable regulator for the hairspring. The improvement comprises means for pinning the end of the hairspring to the bridge and a special bridge extension to retain the hairspring in the open regulator slot. In a first embodiment, the bridge extension is part of an integral bridge member. In the second embodiment, the bridge extension is pivotable to cover the regulator slot as well as to p...

A balance-cock-and-regulator assembly for a timepiece movement comprising a balance cock with an opening for a bearing, an additional opening peripherally spaced from the bearing opening for rotatably mounting a regulator which cooperates with a hairspring.

A regulator assembly for fine adjustment of timepiece movements comprises an index concentrically displaceable around the axis of the balance staff, such displacement permitting a coarse regulation of the active length of the balance spring. The index is in the form of a sliding block friction fitted in a slot of an element of the movement frame such as a plate or a bridge and capable of being moved, the slot having the form of an arc of a circle concentric with the axis of the balance wheel. Th...

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, th...

A securing device which permits the outer end of the hair-spring in a timepiece to be fastened either by gluing or pinning it in place. A U-shaped arm extends radially of the axis of the balance wheel and provides a pair of ears, one for gluing the hair-spring and the other for pinning it. The manufacturer of the watch can thus use the ear for gluing the outer end of the hair-spring, as this method has advantages for production purposes. When the hair-spring is replaced, the watch-repairman can ...