Abstract: A device for counting a number of time unit fractions or a number of movement unit fractions of a mobile member (1; 6; A2), the device including (i) a first cam (1) having a first surface (10: (ii) a second surface (20), the second surface being an abutment surface; (iii) a mobile support (4) urged by a spring (R4); (iv) a mobile pawl (3) mounted on the support (4) and urged by a spring (R3) toward the first surface, the pawl (3) being adapted to cooperate with one or the other of the first and second surfaces (10, 20) according to the position of the support (4); and (v) a control system (80) adapted, in a first or non-counting state of the control system, to maintain the support in a first position and, in a second or counting state of the control system, to allow the movement of the support.

Abstract: A split-seconds device with epicycloidal train for a timepiece. The device includes a split-seconds pinion which carries a fly-back hand and is mounted to rotate freely about a rotation arbor of the timepiece; a differential having an entry wheel adapted to be kinematically connected to a power source of the timepiece; a first exit wheel kinematically connected to the entry wheel by a planetary wheel and meshing with the split-seconds pinion; a second exit wheel kinematically connected to the entry wheel by the planetary wheel; and a control lever allowing to block either the first exit wheel or the second exit wheel, such that whichever of the first and second exit wheels is released by the control lever is adapted to be driven by the entry wheel when the latter is kinematically connected to the power source of the timepiece, thus allowing to block or respectively release the fly-back hand.

Abstract: Display device for a timepiece includes: a first indication organ kinematically linked to a wheel rotatable by a timepiece movement; a second indication organ, coaxial to the first indication organ; a control device including a control organ to be activated by a user; the device arranged to drive the indication organs in superposition to indicate a first item of information, and, in response to an activation of the control organ, to displace one of the indication organs relative to the other to indicate a second item of information; a first and second cam, representing respectively the first and second item of information; a rack having a first and second probe intended to interact respectively with the first and second cam; wherein: in an inactive position of the control organ, the indication organs are superposed; and in an active position, the second indication organ indicates the second item of information.

Abstract: A stop watch (1) includes a time indicator comprising a hand (2), a first scale (31) and a second scale (41). A first part of a time indication is shown by the hand (2) on the first scale (31) and a second part of said time indication is shown by said second scale (41) in combination with said first scale (31). The first scale (31) is fixed and said second scale (41) is movably mounted around said first scale (31). The first part of said time indication corresponds to seconds of a duration counted by said stop watch (1), and the second part of said time indication corresponds to tenths of seconds of said duration.

Abstract: A chronograph has a clock movement for driving a second chronograph hand and a minute chronograph hand and a control apparatus for stopping the second chronograph hand and the minute chronograph hand and for setting in motion a rattrapante mechanism of a second rattrapante indicator and a minute rattrapante indicator. The rattrapante mechanism has a common trip element for starting and stopping the second rattrapante indicator and the minute rattrapante indicator. A catch is triggered by the common trip element for engaging or disengaging from a ratchet recess of a plurality of ratchet recesses that are distributed evenly on the periphery of a minute rattrapante wheel. The minute rattrapante wheel is connected to a minute rattrapante shaft of a minute rattrapante indicator. The number of ratchet recesses on the minute rattrapante wheel corresponds to the number of increments of the minute chronograph hand per revolution.

Abstract: A fly-back chronograph provided with a stop-start control for the fly-back hand is provided. The control does not require careful and frequent adjustment and avoids premature wear of the fly-back wheel parts. The control device has fly-back pincer, a fly-back wheel disposed between the free extremities of the two branches of the said pincer, two fixed reaction members against which a connecting member between the two branches of the pincer bear and deformation means creating a force acting against the said reaction members on the said portion of the connecting member in order to deform it.

Abstract: An electronic analog timepiece provides for elapsed and intermediate split time measurement with hands indicating fractions of a second, seconds and minutes. Hands do not move except by a user stop or split command. Then the hands rapidly move to positions indicating elapsed or split time. Alternatively, conventional continuous indications are provided except when the internal battery nears depletion, or intermittent operation of the hand indicating fractional seconds provides warning that the battery nears depletion. A wristwatch type analog display stopwatch using a plurality of step motors to drive the hands is produced.

Abstract: A stop watch (FIG. 2) for use by runners. A strap is provided and the strap bars 56,57 are disposed at a high level while the back 61 of the watch case is concave or dished. Push-buttons or control pins 17, 18, and 19, for starting, stopping, and resetting the watch, are disposed parallel to the axis of the watch and are actuated by pressing in the axial direction with the finger. These features accommodate strapping the watch to the hand so that the watch fits comfortably in the palm of the hand which is a convenient location when worn by runners.

Abstract: The watch, as exemplified by FIG. 6, comprises a motor 9 which drives the hands of a timepiece mechanism and a motor 15 which advances those of a chronographic mechanism. When the timepiece mechanism is in operation, a counter 98 receives every six seconds a pulse which opens a gate 85 which passes a pulse of 32 Hz and causes the shaft of the motor 9 to advance one step. When the stopwatch mechanism is in operation, a counter 78 receives ten pulses per second; every ten pulses it sends a pulse to the motor 15 and drives the chronographic second hand. When the chronographic mechanism is stopped, this second hand shows the seconds of chronometric time, the supplementary tenths of seconds being stored in the counter 78. The state of this counter 78 is compared with the state of an UP-DOWN counter 86 which determines the position of the second hand of the timepiece mechanism.

Abstract: An analog display electronic stopwatch including at least one first hand driven during elapsed time measurement and a secondary hand driven after completion of elapsed time measurement is provided. The first hand indicates an arbitrary unit of elapsed time which is displayed during time measurement and the secondary hand indicates time in a fraction of the arbitrary time units, the secondary hand driven after elapsed time measurement. The stopwatch includes elapsed time measurement circuitry including a memory counter circuit for counting elapsed time in 1/100ths of a second and for providing a signal for driving a second and minute hand during time measurement, a secondary counter for providing a signal for driving a 1/100th second hand after completion of time measurement. The 1/100th second hand is driven to indicate the elapsed time under one second as determined by a coincidence detector for comparing the output of the secondary counter signal and that of the memory counter.

Abstract: An electronic timepiece comprises an oscillator, a frequency divider for frequency dividing the output signal of the oscillator to generate 100 Hz output pulse signals, time count circuits having a plurality of counters cascade-connected to count the output pulse signals of the frequency divider, a decoder circuit for decoding the output signal of the time count circuits to generate a display signal and a display device for displaying data corresponding to the output display signal of the decoder circuit, in which a stopwatch display mode and a normal time display mode may be selected by the operation of a switch. The electronic timepiece further includes a control circuit connected between the decoder circuit and display device and adapted to inhibit normal time display data from being supplied to the display device in response to the operation of the switch which sets the electronic timepiece into the stopwatch display mode.