摘要:
Synchronization apparatus for a motor comprising a maintenance circuit furnishing to the motor the necessary energy for its rotation and delivering a frequency fm proportional to its speed, and utilizing a precise frequency fp furnished, for example, by a quartz oscillator connected to a frequency divider. Connected to a bistable phase comparator are the output frequency f1 = fp/x of a divider by x, and the output of frequency f2 of a divider by x + .alpha. to the input of which divider there is added .alpha.y impulses to each cycle of the frequency fm. The output of the phase comparator acts on the maintenance circuit such as to interrupt or re-establish the distribution of the energy to the motor according to whether this output is in one state or the other such that f2 is equal and in phase with f1 and fm is sychronized to a mean value equal to fp/xy for which .alpha., x, and y are whole numbers.
摘要:
An electronic watch comprising a precision resonator and oscillator connected to a frequency divider which produces impulses of 1 H.sub.z. Connected to the frequency divider in sequence is a seconds counter, a minutes counter, an hour counter and possibly a day counter. An electronic means serves for displaying the state of the counter, and a microswitch including an actuator activated externally of the watch by finger pressure, acts to reset the seconds counter to zero and acts concurrently on all or part of the divider, independently of the minutes and hours counters, the actuator being isolated from or combined with the normal device to reset the time or correct the date. The seconds counter is constructed as a series of counter units, the last of which is a binary counter and all of the units are reset to zero when the switch is closed. In this way errors of thirty seconds or less can be corrected by acting on the actuator.
摘要:
The timepiece comprises a detector and control circuit for the stepping motor. This circuit comprises on the one hand an amplifier including at least a MOS transistor receiving on a first terminal a voltage representative of the current in the driving coil of the motor and having a second terminal joined up to a condenser connected to one of the poles of a power source. The amplifier delivers signals representative of the current in the condenser. The circuit comprises on the other hand means connected to the amplifier for controlling the driving pulses. The circuit is easy to integrate and it has a very low power consumption.
摘要:
Apparatus for adjusting the output frequency of a frequency divider comprising a circuit constituted of a resistance R and a capacitor C for receiving output pulses from the divider. A comparator is connected to the RC circuit and to the divider for receiving normal pulses from the divider and pulses with a delay t proportional to the time constant RC for comparing the delay pulses with the normal pulses to produce control pulses of duration t. A switching arrangement is coupled to the comparator and to the divider for switching the rate of the divider from an initial rate n.sub.o to a value n' during the duration of the control pulses. The divider has a plurality of outputs and when n' is greater than n.sub.o the RC circuit is connected to one of the outputs while when n' is smaller than n.sub.o the RC circuit is connected to another of the outputs.
摘要:
The analog display device comprises at least one needle driven through a gear wheel by a stepping motor, a control circuit for the motor, bidirectional counter locked with the position of the needle on a dial, the logic states of the outputs of the counter being representative of the position of the needle on the dial and a comparator for the informations delivered by the counter and the informations corresponding to the value of the function to display, the comparator acting at least indirectly on the control circuit and on the counter so that the position of the needle is representative of the value of the function to display. The device does not require any digital-analog converter nor galvanometer and it allows for, example, to display simultaneously with at least two needles the value of at least two different functions, to make changes of scale, and so on. The device may also be combined with another type of analog or digital display.
摘要:
A rotor for a micromotor with electronic control comprising an axle on which are mounted two plates of ferro-magnetic material at least one of which carries permanent magnets, all the permanent magnets mounted on the same plate being of the same polarity. Poles of ferro-magnetic material are interposed between these magnets and each plate is separately magnetized after mounting of the magnets, in a unidirectional magnetic field before assembling the two plates on the axle. The magnets can be mounted on a intermediate element of non-ferro-magnetic material which itself is fixed on the plate by adhesives, riveting, or swaging. The two plates are mounted on the axle such that the magnets of one face the poles of ferro-magnetic material of the other.
摘要:
An analogue display golf counter comprises a first example four hands independent of each other driven by four stepping motors. The position of the hands is controlled by an electronic system comprising counting, storing, processing and control means in response to programmed algorithms and to data introduced by means of two pushers. The first hand indicates the course position (hole), the second the operating mode, and the last two the number of points, one displaying the units with the sign and the other the tens. There are three operating modes, namely "simple total", "cumulative total" and "programming". In this latter mode, it is possible to program a standard course to which reference may be made.
摘要:
An electric watch comprising a precise resonator, connected to an oscillator to which a frequency divider is connected. A control device is connected to the watch movement and to the frequency divider for controlling the watch movement to eliminate small errors in indicated time. The control device comprises a first counter synchronized in operation with the watch movement and a second reference counter connected to the divider, a comparator being connected to the counters for comparing the states thereof and coupled to the watch movement for maintaining the counters in phase while varying the speed of the watch movement. The second reference counter can be set to a predetermined state independent of the first counter from outside the watch. In one embodiment the watch movement includes a step motor supplied with impulses from the divider, the comparator being connected to the step motor to act on the frequency of the impulses supplied by the divider to vary the speed of the motor until the first and second counters are equal. In a second embodiment a motor coil serves for applying energy to the watch movement to vary its speed of operation, the motor coil being connected to the comparator to be controlled thereby to effect speed change of the watch movement until the counters are equalized.
摘要:
An electronically regulated watch movement comprising a time-wheel mechanism driven by a drive, a generator being coupled to the drive via at least a portion of the time-wheel mechanism and with substantial gear reduction. The generator includes a rotor with magnets and coils for producing a.c. voltage at a frequency of operation FG. An electronic regulating circuit is connected to the generator and includes an oscillator for producing a precise reference frequency FR and a comparator having inputs receiving frequencies FR and FG to compare the same. A power source is connected to the comparator and the generator to supply current to the generator when FG > FR to brake the generator until FG = FR and thereby provide a regulated operation of the time-wheel mechanism.