Abstract: A timepiece power source is provided, including a barrel containing a mainspring mounted between a drum and an arbor rotating integrally with a ratchet wheel, including a differential gear coaxial to the barrel, with a first input driven by the ratchet wheel, a second input which is the drum, and a pivoting output wheel, coaxial to the arbor, arranged to form or to drive a power reserve indicator, the differential gear including balls driving the output wheel, cooperating with an upper surface of the drum, and with a lower surface, which is opposite thereto, of a differential plate forming the first input, pivoting coaxially on the arbor and connected to the ratchet wheel by a friction means cooperating with a plate, and the ratchet wheel forms the cover of the barrel.

Abstract: Device (100) for displaying a magnitude on an oscillating weight (1) for a self-winding timepiece movement (10) comprising a means (20) of displaying said magnitude by comparison to a complementary display means (30). Said display means (20) pivots coaxially to said oscillating weight (1), and is subject to a general pivoting motion resulting from the combination of a first pivoting motion synchronous with that of said oscillating weight (1), and a second pivoting motion resulting from said display means (20) being pivoted by said movement (10) relative to said complementary display means (30) integral with said oscillating weight (1). Oscillating weight (1) including such a device (100). Self-winding watch including an oscillating weight (1) comprising such a device (100), and whose motions are transmitted to a mainspring of said watch.

Abstract: The invention concerns a dynamometric device (100) indicating the remaining barrel torque in a timepiece including a barrel ratchet (2) cooperating with a ratchet click (3) to keep accumulated, in a mainspring, the energy transmitted by a winding crown, said click (3) which pivots about a pin (10) between a meshed position where a tooth (31) of the ratchet click (3) cooperates with said ratchet (2), and a disengaged position where each tooth (31) of said click (3) withdraws when the ratchet (2) rotates as said barrel is being wound, said click (3) being returned to said ratchet (2) under the action of a spring (4). The invention is characterized in that it includes a strip spring (1) with a resilient arm (8) fixed to the plate, and in that said pin (10) is mounted on a support (12) of said arm (8), at one end of which it has a hand (6) displaying the barrel torque reserve, in cooperation with a torque reserve indicator (5).

Abstract: The invention concerns an oscillating weight (1) for an automatic winding watch, including a power reserve indicator device (100) integrated in said oscillating weight (1) and including means (20) for displaying the power reserve by comparison to complementary display means (30), said display means (20) and complementary display means (30) being integrated in said oscillating weight (1). Said display means (20) and complementary display means (30) are movably mounted to rotate synchronously, at a given moment, relative to said oscillating weight (1). The invention also concerns an automatic winding watch including an oscillating weight (1) of this type, whose movements are transmitted to a mainspring of said watch.

Abstract: A power reserve display mechanism includes a differential (22) having: a first input (22a) connected to a ratchet (16) of a barrel (24) and to an oscillating mass automatic winding system, a second input (22b) connected to the drum of a barrel (24), an output (22c) connected to a display system. The display system includes at least one disc (40) provided with digits for displaying numbers between a minimum number and a maximum number. Moreover, the disc is connected to the output (22c) of the differential (22) via a reduction train (26), arranged such that the display system displays the minimum number when the barrel is empty and the maximum number when the barrel is maximally loaded. The reduction train and the automatic winding system are arranged such that the disc advances by one pitch each time the oscillating mass performs on revolution.

Abstract: The present invention relates to a self-winding watch including an oscillating mass (8), the movements of which are transmitted to a spring barrel of the watch, this watch likewise including a device for indicating the power reserve comprising means (2) for displaying the power reserve, characterised in that the means (2) for displaying the power reserve are mounted on the oscillating mass (8).

Abstract: To provide a residual wound quantity display mechanism of a timepiece, in which it is possible to change a way of a display without changing a basic structure, and a timepiece with the mechanism concerned.

Abstract: The present invention relates to a self-winding watch including an oscillating mass (8), the movements of which are transmitted to a spring barrel of the watch, this watch likewise including a device for indicating the power reserve comprising means (2) for displaying the power reserve, characterised in that the means (2) for displaying the power reserve are mounted on the oscillating mass (8).

Abstract: The present invention concerns a timepiece including a movement fitted with a power reserve indicator device, said timepiece including a barrel closed by a cover, a mainspring housed in said barrel and respectively connected to a barrel arbour and means for winding said mainspring, said indicator device including a differential gear kinematically connected by a first input to the barrel arbour, by a second input to the barrel and by an output to a power reserve indicator member and wherein the differential gear frame is arranged coaxially to the barrel arbour, characterized in that the second differential gear input is secured to the barrel cover, in that the differential gear output is formed by an inner toothed crown, in that the inner toothed crown is kinematically connected to the first input by at least first and second planetary wheel sets meshed with each other and in that the at least two planetary wheel sets are carried by the cover.

Abstract: A running reserve indicator is provided for a mechanical clockwork provided with a main barrel for driving a gear-train and at least a second barrel for driving a gear-train allocated to an auxiliary function which is performed during a determined period. With the indicator, the running reserve displayed with the aid of a hand and a dial is always equal to the running reserve of the barrel having the smallest reserve.

Abstract: A timepiece has a mainspring winding state display apparatus for arranging a rotational center of a winding mark hand at an arbitrary pertinent position in a movement of the timeplace. The movement has a barrel complete and a speed reducing mechanism cooperatively moved with a barrel gear of the barrel complete for reducing a speed of ratotion of the barrel gear. A segment gear undergoes rotation in accordance with an output of the barrel gear. A winding mark indicator undergoes rotation in accordance with an operation of the segment gear. A mainspring winding state display member displays a winding state of the mainspring in accordance with rotation of the winding mark indicator. The segment gear includes a first segment gear for receiving an output of the speed reducing mechanism and a second segment gear for rotating the winding mark display wheel.

Abstract: This invention has for object to propose an operation level indicator device for watches with double spring barrels, both those with manual winding and those with automatic winding. This scope is reached by an operation level device, having two spring barrels 1, 2, one for winding 1 and the other for unwinding 2, a star wheel 3 integral with a display means 17. According to the invention, the winding spring barrel includes a winding pin 9 actuating a winding lever 4 dragging the star wheel 3 into positive rotation, the unwinding spring barrel 2 includes an unwinding pin 10 actuating an unwinding lever 5 that drags the star wheel 3 into negative rotation, the latter being maintained in its position by a catch 8.

Abstract: To provide a power accumulation structure of a simple construction, in which a planetary mechanism is not used, for a timepiece using a spring as power. A power accumulation structure of a simple construction not using a planetary mechanism is a power accumulation structure using a threaded mechanism.