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 directe...

The regulating device, represented by its escapement wheel (5), is kept horizontal by being supported by a platform (3) secured to a counterweight (9) rotatably mounted about an arbour A.sub.1, pivoting in a carriage (10) rotatably mounted about an arbour A.sub.2 perpendicular to the arbour A.sub.1. Escapement wheel 15 meshes with a driving wheel (6) secured to arbour A.sub.1 and forming the output of a first differential (11) having at its inputs a kinematic corrective chain (8, 12, 14, 16, 18)...

A mechanical timepiece has a power source comprised of a mainspring for undergoing rewinding movement to generate a rotational force. A front train wheel undergoes rotation in accordance with a rotational force generated during rewinding movement of the mainspring. An escapement/speed-control device controls rotation of the front train wheel. The escapement/speed-control device has a balance with a hairspring for undergoing alternately repeating rotational movement in left and right directions. ...

A calendar watch includes a central date indicator (4). The indicator is united with a crown wheel (9) comprising teeth (11) forming a circular crown (12) arranged to be perpendicular to a face (13) of said wheel. The teeth (12) are driven by a finger (14) rotating in a plane intersecting said crown in its height. The finger is united with a date driving wheel (15). The invention permits easy transformation of a watch having its date display in a dial aperture to a watch having a date indicator ...

The timepiece of the invention includes a hand for date display. This hand is driven via a calendar ring of a well-known type bearing teeth on its outer circumference. Such teeth drive intermediate gearing which in turn drives a calendar wheel fixed to the date display hand. This mechanism enables the mounting of a date displaying hand on a movement normally intended to show dates through a dial opening with minimum modifications.

A mechanism for setting the date-indicating indicia on a calendar watch including a date-setting mechanism having an inactive position and at least one first active position, said setting mechanism causing the date-indicating indicia to advance by one step into the first active position immediately after the date-indicating mechanism has been brought to a position corresponding to the date "31."

A combination of a wristband and watch which includes a tubular wristband having an inner layer of material, an outer layer of material, and a watch placed therebetween is disclosed. The inner layer has a slit formed therein and the outer layer has an opening formed therein. The slit and opening are substantially aligned. The watch has a base and a face attached to the base. The opening includes button-hole stitching. The face includes a rim and a recess is formed between the base and the rim. O...

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...

This invention relates to a timepiece, such as a wrist watch, with a drive for the step-by-step rotation of at least one numeral disc comprising a date ring and concentrically mounted day ring, having the days of the week in annular arrangement, both rings being covered by a dial. The dial includes at least one main date window and one main day window which may be combined to form one common main window and each making visible one day of the week on the day ring and the contemporary date on the ...

Synchronizable clock with a mechanical resonator as regulator, especially receiver clocks synchronized by wireless signals and synchronous clocks driven by alternating current having a mechanical regulator forming a principal part of a running reserve. A coupling is provided between the resonator and the hand mechanism, which only transmits one half of the counting impulses. There is also a regulating mechanism which is connectable to the resonator and which alters the spring force in the resona...