WRISTWATCH

Abstract

The invention relates to a wristwatch with a clock generator assembly. The clock generator assembly comprises a first clock generator, a pulse counter, and an output device. The first clock generator comprises a piezoelectric oscillating crystal and is configured to generate a clock signal. The pulse counter is configured to count the clock signal of the first clock generator, wherein the output device is configured to output a useful signal if a count value of the counted clock signal of the first clock generator is equal to a predetermined count value.

Claims

1. A wristwatch with a clock generator assembly, wherein the clock generator assembly comprises: a first clock generator, which comprises a piezoelectric oscillating crystal and is configured to generate a clock signal, a pulse counter, which is configured to count the clock signal of the first clock generator, and an output device, which is configured to output a useful signal if a count value of the counted clock signal of the first clock generator is equal to a predetermined count value.

2. The wristwatch according to claim 1, wherein the clock generator assembly further comprises a second clock generator, which comprises a piezoelectric oscillating crystal and is configured to generate a clock signal, wherein the output device is configured to compare the clock signal of the second clock generator with the clock signal of the first clock generator.

3. The wristwatch according to claim 2, wherein the output device is configured to output the useful signal if a count value of the counted clock signal of the first clock generator is equal to the predetermined count value, only if a deviation between the clock signal of the second clock generator and the clock signal of the first clock generator is less than a predetermined deviation.

4. The wristwatch according to claim 2, wherein the second clock generator is a substitute clock generator and the clock signal of the second clock generator is a substitute clock signal, wherein the output device is configured to transmit a useful signal based on the substitute clock signal of the substitute clock generator instead of based on the clock signal of the first clock generator if a deviation between the substitute clock signal of the substitute clock generator and the clock signal of the first clock generator is greater than the predetermined deviation.

5. The wristwatch according to claim 2, wherein the output device is configured to correct the predetermined count value by means of a predetermined correction factor, if a deviation between the clock signal of the second clock generator and the clock signal of the first clock generator is greater than the predetermined deviation, wherein the output device is configured to output the useful signal if the count value of the clock signal of the first clock generator is equal to the corrected predetermined count value.

6. The wristwatch according to claim 5, wherein the predetermined correction factor are based on a predetermined temperature dependency of the oscillation frequency of the piezoelectric oscillating crystal of the first clock generator, a predetermined temperature dependency of the oscillation frequency of the piezoelectric oscillating crystal of the second clock generator and a difference between a count value of the counted clock signal of the first clock generator and a count value of the counted clock signal of the second clock generator.

7. The wristwatch according to claim 1, comprising a temperature sensor, which is configured to detect a temperature of the first clock generator and/or an environment of the first clock generator and to compare it with a predetermined temperature, wherein: the output device is configured to correct the predetermined count value based on the detected temperature, if a temperature deviation between the detected temperature and the predetermined temperature is greater than a predetermined temperature deviation, wherein the output device is configured to output the useful signal if the count value of the clock signal of the first clock generator is equal to the corrected predetermined count value, and/or the wristwatch further has a heating device, which is configured to heat the first clock generator to the predetermined temperature, if a temperature deviation between the detected temperature of the first clock generator and/or an environment of the first clock generator and the predetermined temperature is greater than a predetermined temperature deviation.

8. The wristwatch according to claim 2, wherein the clock generator assembly further comprises a third clock generator, which is configured to generate a clock signal and in particular comprises a piezoelectric oscillating crystal, wherein the output device is configured to compare the clock signal of the second clock generator, the clock signal of the third clock generator and the clock signal of the first clock generator with one another.

9. The wristwatch according to claim 1, further comprising: a driving device, and a mechanical time display device, wherein the driving device is configured to receive the useful signal output by means of the output device and in response thereto, move the time display device.

10. The wristwatch according to claim 1, wherein the piezoelectric oscillating crystal of the first clock generator and/or the second clock generator and/or the third clock generator is a natural or synthetic crystal, wherein in particular a respective piezoelectric oscillating crystal is a natural tourmaline, citrine, amethyst, Swiss rock crystal or a synthetic quartz crystal.

11. The wristwatch according to claim 1, wherein the oscillation frequency of the piezoelectric oscillating crystal of the first clock generator is 8888 Hz or 88888 Hz and/or the output device is configured to output the useful signal with a frequency of 8 Hz, if the count value of the counted clock signal of the first clock generator is equal to a predetermined count value.

12. The wristwatch according to claim 11, wherein the piezoelectric oscillating crystal of the first clock generator is a quartz crystal, in particular a synthetic quartz crystal, and is formed as a fork oscillator with two prongs, wherein, for an oscillation frequency of the piezoelectric oscillating crystal of the first clock generator of 8888 Hz, the length of each prong is preferably 3.02127 mm, the thickness of each prong is preferably 0.3 mm and the depth of each prong is preferably 0.6 mm, or wherein, for an oscillation frequency of the piezoelectric oscillating crystal of the first clock generator of 88888 Hz, the length of each prong is preferably 0.55155 mm, the thickness of each prong is preferably 0.1 mm and the depth of each prong is preferably 0.3 mm.

13. The wristwatch according to claim 1, wherein the piezoelectric oscillating crystal of the first clock generator and/or the second clock generator and/or the third clock is a tourmaline crystal and has the shape of a small plate, in particular of a round small plate.

14. The wristwatch according to claim 1, wherein the piezoelectric oscillating crystal of the first clock generator and/or the second clock generator and/or the third clock generator is an amethyst oscillating crystal or a citrine oscillating crystal and has the shape of a small plate, in particular of a round small plate.

15. A method for producing a wristwatch, in particular a wristwatch with a clock generator assembly according to claim 1, comprising the steps: providing a first clock generator, which comprises a piezoelectric oscillating crystal with a predetermined oscillation frequency and is configured to generate a clock signal, providing a pulse counter, which is configured to count a clock signal of the first clock generator, providing an output device, storing a predetermined count value, which is derivable from the predetermined oscillation frequency, in a memory of the pulse counter or the output device, configuring the output device to output a useful signal if a count value of the clock signal counted by the pulse counter of the first timer is equal to the predetermined count value, and installing the first clock generator, the pulse counter and the output device in the watch.

16. The method according to claim 15, wherein the step of providing the first clock generator with the piezoelectric oscillating crystal having the predetermined oscillation frequency comprises the following steps: providing an arbitrary piezoelectric oscillating crystal, generating an oscillation of the piezoelectric oscillating crystal, and measuring the oscillating piezoelectric oscillating crystal by means of a frequency counter to determine its oscillation frequency, which corresponds to the predetermined vibrating frequency.

17. The method according to claim 15, wherein the step of providing the first clock generator with the piezoelectric oscillating crystal, which has the predetermined oscillation frequency comprises the following steps: selecting an oscillation frequency as the predetermined oscillation frequency, and shaping, in particular by cutting or etching, or refining by removing material by means of a laser, a piezoelectric oscillating crystal from a raw crystal in such a way that the oscillating crystal has the predetermined oscillation frequency.

18. The method according to claim 17, wherein the frequency of 8888 Hz or 88888 Hz is selected as the predetermined oscillation frequency, and/or wherein the predetermined oscillation frequency and/or the predetermined count value is/are selected such that the output device is configured to output the useful signal with a frequency of 8 Hz, if the count value of the counted clock signal of the first clock generator is equal to a predetermined count.

19. The method according to claim 15, wherein the predetermined oscillation frequency and/or the predetermined count value is/are set in such a way and/or wherein a driving device of the wristwatch is configured in such a way that a second hand of a mechanical time display device of the wristwatch is movable at a frequency higher than 1 Hz.

Description

[0105] Further details, advantages and features of the present invention result from the following description of exemplary embodiments with reference to the drawing.

[0106] FIG. 1 shows a simplified top view of a wristwatch according to the invention with a clock generator assembly according to an exemplary embodiment of the present invention,

[0107] FIG. 2 shows a simplified schematic representation of the clock generator assembly of FIG. 1,

[0108] FIG. 3 is a simplified schematic perspective view of a raw crystal from which a piezoelectric oscillating crystal of a first clock of the clock generator assembly of FIG. 2 is formed, and

[0109] FIG. 4 is a simplified schematic perspective view of a piezoelectric oscillating crystal of a first clock generator of a clock generator assembly according to a second embodiment of the present invention.

[0110] Hereinafter, a wristwatch 100 according to the invention with a clock generator assembly 10 according to an exemplary embodiment of the present invention is described in detail with reference to FIGS. 1 to 3.

[0111] As can be seen from FIG. 1, the wristwatch 100 has a case 11 and a watch glass 15 arranged therein. The wristwatch 100 also has a dial 12 and three hands 13 for displaying the hours, minutes and seconds. The hands 13 are parts of a time display device 102. The wristwatch 100 also has two connectors 14 for a bracelet.

[0112] The clock generator assembly 10 ensures that a useful signal is generated, which can be received by a driving device 101 for moving the hands 13. The useful signal can also be referred to as a useful clock signal within the context of the invention. How the useful signal is generated will be explained in more detail later with reference to FIG. 2.

[0113] The driving device 101 comprises a driving element, which can be directly connected to the mechanical time display device 102. Alternatively, the driving device 101 can, in addition to the driving element, comprise a transmission device formed as a wheel train, which connects the driving element to the mechanical time display device 102 and translates a movement of the driving element into a movement of the mechanical time display device 102. In particular, the driving element can be formed as an electric stepping motor, in particular as a Lavet stepping motor, or as another type of electromechanical drive.

[0114] The clock generator assembly 10, the driving device 101 and the mechanical time display device 102 are arranged in the case 11 under the dial 12.

[0115] In FIG. 2, the clock generator assembly 10 is shown in more detail.

[0116] According to FIG. 2, the clock generator assembly 10 has a first clock generator 1, a pulse counter 2 and an output device 3.

[0117] The first clock generator 1 comprises in this exemplary embodiment a piezoelectric oscillating crystal made of tourmaline (also: tourmaline oscillating crystal) and is configured to generate a clock signal. For this purpose, the piezoelectric oscillating crystal of the first clock generator 1 can be made to oscillate at its oscillation frequency (resonance frequency) due to its piezoelectric properties in an oscillator circuit. For supplying the clock generator 1 with electric current, a power supply device 103 is provided in the wristwatch 100. The power supply device 103 can in particular have a battery and/or a rechargeable battery and/or a continuous power generator.

[0118] Here, the pulse counter 2 is configured to count a clock signal of the first clock generator 1 during the operation of the wristwatch 100. Thereby, a count value of the counted clock signal of the first clock generator 1 is determined, which is compared in particular by means of the output device 3 with a predetermined count value. The predetermined count value is stored in a memory 9 of the output device 3.

[0119] The output device 3 is also configured to output a useful signal based on the result of the comparison or rather if the count value of the counted clock signal of the first clock generator 1 is equal to the predetermined count value.

[0120] The useful signal, which is transmitted to the driving device 101, can be a one-second cycle or only a fraction of a second.

[0121] In the latter case, the hand 13, which is responsible for displaying the seconds, does not move forward by a jerk every second but a specific fraction of the second. In other words, the useful signal is not sent to the driving device 101 every second, i.e. at a frequency of 1 Hz, but more often, i.e. e.g. every half second or quarter of a second or more often. Thereby, a second hand 13 jumping every second can be avoided. For this purpose, the driving element and/or the transmission device of the driving device 101, which drives the hand movement, is/are designed in such a way that the second hand 13 carries out its movement more or less invisibly, in that the useful signal does not occur 60 times per minute, but a correspondingly higher number of times. When using the pulse counter 2, the adjustment of the interval of movement of the second hand 13 is freely selectable. Only the driving element and/or the transmission device of the driving device 101 must be matched to the timing of the useful signal.

[0122] Moreover, the clock generator assembly 10 includes a second clock generator 4, which in this exemplary embodiment has a piezoelectric oscillating crystal made of quartz and is configured to generate a clock signal. In particular, the piezoelectric oscillating crystal of the second clock generator 4 is a synthetic quartz crystal. For generating a clock signal, the piezoelectric oscillating crystal of the first clock generator 1 can be made to oscillate at its oscillation frequency (resonance frequency) in an oscillator circuit due to its piezoelectric properties. Likewise, the oscillating crystal of the second clock generator 4 can also be made to oscillate by its oscillator circuit. For this purpose, the power supply device 103 can supply both the first clock generator and the second clock generator 4 with electric current.

[0123] The output device 3 is configured to compare the clock signal of the second clock generator 4 with the clock signal of the first clock generator 1. By this comparison process, the accuracy of the clock signal of the first clock generator 1 can be checked.

[0124] In order to save power and thus extend the life of the battery and/or the time until the next charging cycle of the rechargeable battery of the power supply device 103, the second clock generator 4 is configured to generate its clock signal only at predetermined time intervals, e.g. every 15 minutes. That is, the second clock generator 4 is made to oscillate only at predetermined time intervals. Thus, the comparison between the clock signal of the first clock generator 1 and the clock signal of the second clock generator 4 also takes place only at predetermined time intervals.

[0125] The quartz oscillating crystal of the second clock generator 4 is preferably formed in such a way that it has an oscillation frequency of 32768 Hz. The advantage of a quartz oscillating crystal is that its oscillation frequency is essentially considered independent from parameters such as e.g. the temperature of the quartz oscillating crystal or its environment.

[0126] As can be seen from FIG. 2, the clock generator assembly 10 also has a frequency divider 6, which is configured to halve the oscillation frequency of the quartz oscillating crystal 15 times, 14 times, 13 times or 12 times in order to get to the frequency of 1 Hz, 2 Hz, 4 Hz or 8 Hz, depending on whether the useful signal is a second cycle or a corresponding fraction of a second.

[0127] It is, however, also conceivable for the clock generator assembly 10 to also have a further pulse counter 2′, which is configured to count the clock signal of the second clock generator 4. This is particularly the case if the selected interval of the movement of the second hand 13 is not achievable by halving the oscillation frequency of the quartz oscillating crystal or if a piezoelectric oscillating crystal other than a standardized quartz crystal is used for the second clock generator 4. The output device 3 can be configured to compare a count value determined by counting the clock signal of the second clock generator 4 with the count value of the counted clock signal of the first clock generator 3.

[0128] The output device 3 can in particular be configured to output the useful signal based on the clock signal of the first clock generator 1 if a count of the counted clock signal of the first clock generator 1 is equal to the predetermined count value, only if there is a deviation between the clock signal of the second clock generator 4 and the clock signal of the first clock generator 1 is less than a predetermined deviation.

[0129] In the opposite case, that is, if a deviation between the clock signal of the second clock generator 4 and the clock signal of the first clock generator 1 is greater than the predetermined deviation, the output device 3 is configured to output a useful signal based on the clock signal of the second clock generator 4 instead of based on the clock signal of the first clock generator 1. The second clock generator 4 with the quartz oscillating crystal acts here as a substitute clock generator. Thus, e.g. for the time in which the clock would be taken off and a too high temperature drop would trigger a too high frequency difference between the first clock signal and the second clock signal, the second clock generator 4 takes the lead.

[0130] Alternatively, in the case of a deviation between the clock signal of the second clock signal 4 and the clock signal of the first clock generator 1 that is greater than the predetermined deviation, the output device 3 can be configured to correct the predetermined count value using a predetermined correction factor. Here, the output device 3 can be configured to output the useful signal if the count value of the clock signal of the first clock generator 1 is equal to the corrected predetermined count value.

[0131] For checking the clock accuracy of the clock generator assembly 10, which can be influenced by temperature fluctuations due to the temperature dependence of the oscillation frequency of the tourmaline oscillating crystal of the first clock generator 1, a temperature sensor 5 is, as can be derived from FIG. 2, provided in the clock generator assembly 10. The temperature sensor 5 is configured to detect a temperature of the first clock generator 1 and/or its environment and to compare this with a predetermined temperature.

[0132] The predetermined temperature is here the temperature at which the predetermined count was set. If a temperature deviation between the detected temperature and the predetermined temperature is greater than a predetermined temperature deviation, the output device 3 may be configured to correct the predetermined count value based on the detected temperature.

[0133] For this purpose, a dependency of the oscillation frequency of the tourmaline oscillating crystal on the temperature must have been predetermined. In other words, the temperature response of the tourmaline oscillating crystal must be measured in advance so that the predetermined count value can be corrected according to the detected temperature of the first clock generator 1 and/or its environment.

[0134] The output device 3 is then configured to output the useful signal if the count value of the clock signal of the first clock generator 1 is equal to the corrected predetermined count value.

[0135] The detection of the current temperature by means of the temperature sensor 5 and the comparison of the detected current temperature with the predetermined temperature can take place at predetermined intervals.

[0136] In addition, the correction parameter can be based on the predetermined temperature dependency of the oscillation frequency of the piezoelectric oscillating crystal of the first clock generator 1, a predetermined temperature dependency of the oscillation frequency of the piezoelectric oscillating crystal of the second clock generator 4, and a difference between a count value of the counted clock signal of the first clock generator 1 and a count value of the counted clock signal of the second clock generator 4.

[0137] A further possibility of preventing an oscillation frequency deviation of the clock signal of the first clock generator 1 in the event of a temperature deviation is to always keep the first clock generator 1 at a constant temperature. For this purpose, a heating device 8, in particular a heating coil, can be provided in addition to the temperature sensor 5. The heating device 8 is configured to raise the temperature of the first clock generator 1 back to the predetermined temperature in the event of a deviation. The predetermined temperature corresponds to the highest temperature normally aimed for by means of the heating device 8.

[0138] Preferably, the clock generator assembly 10 also comprises a third clock generator 7. The third clock generator 7 comprises a piezoelectric oscillating crystal and is configured to generate a clock signal. For example, the piezoelectric oscillating crystal of the third clock generator 7 can be a synthetic standardized quartz oscillating crystal.

[0139] For counting the clock signal of the third clock generator 7, the clock generator assembly can have a further pulse counter 2″. In this case, the output device 3 is configured to compare the clock signal of the third clock generator 7, the clock signal of the second clock generator 4 and the clock signal of the first clock generator 1 with one another. From the result of this comparison, aging-related oscillation frequency deviations of the piezoelectric oscillating crystal of the first clock generator 1 can also be discovered, which can then also be corrected.

[0140] It should be noted that the clock generator assembly 10, in particular the pulse counter 2 and/or the pulse counter 2′ and/or the pulse counter 2″ and/or the output device 3, can be formed as a component, e.g. an application-specific integrated circuit (ASIC). Alternatively, the clock generator assembly 10, in particular the pulse counters 2, 2′, 2″ and the output device 3, can be parts of a microcontroller.

[0141] It should also be noted that the first clock generator 1 is the primary clock generator of the clock generator assembly 10, wherein the second clock generator 4 and/or the third clock 7 can serve as a backup clock generator if it is determined that the clock accuracy of the first clock generator 1 is not high enough, and/or are to be understood as a control generator clock so that the accuracy of the first clock generator 1 can be checked and, if necessary, corrected.

[0142] The wristwatch 100 can also include a device 104 with a digital display device, by means of which the current frequency of the clock signal of the first clock generator 1 is displayed. Alternatively or additionally, the device 104 can include an interface via which an external device can read out the current frequency of the first clock generator 1. In particular, if there is a temperature deviation between the detected temperature and the predetermined temperature that is greater than a predetermined temperature deviation, the current temperature of the first clock generator 1 and thus also the current frequency of the clock signal of the first clock generator 1 can be determined. Displaying the current frequency of the clock signal of the first clock generator 1 can serve as evidence that the first clock generator 1 is in fact the primary clock generator of the clock generator assembly 10.

[0143] How the piezoelectric oscillating crystal made of tourmaline, i.e. the tourmaline oscillating crystal, of the first clock generator 1 is produced is explained below with reference to FIG. 3.

[0144] A raw tourmaline crystal 20 is shown in FIG. 3.

[0145] It results from FIG. 3 in particular that the raw tourmaline crystal 20 has a trigonal structure. In other words, the tourmaline crystallizes trigonally, i.e. in the shape of a triangle. The raw tourmaline crystal 20 has a first crystallographic axis 501, a second crystallographic axis 502 and a third crystallographic axis 503.

[0146] The first crystallographic axis 501 corresponds to the longitudinal crystallographic axis of the tourmaline raw crystal 20. The second crystallographic axis 502 is perpendicular to the first crystallographic axis 501 and runs through an angle that is formed between a first facet 21 and a second facet 22 of the tourmaline raw crystal 20. The second axis 502 can be referred to as the TA axis (TA: Triangle—Angle). The third crystallographic axis 503 of the raw tourmaline crystal 20 is perpendicular to the first crystallographic axis 501 and runs essentially parallel to the basic direction of the slightly curved third facet 23 of the tourmaline oscillating crystal. The third crystallographic axis 503 is referred to as TS axis (TS: tourmaline side).

[0147] The raw tourmaline crystal 20 can be described by a structural triangle 24 or the cross section of the raw tourmaline crystal 20 perpendicular to the first crystallographic axis 501 can be approximated by a structural triangle 24, the sides of which are associated with or follow the facets 21, 22, 23 of the raw tourmaline crystal 20. Thus, the first crystallographic axis 501 is perpendicular to the plane of the structural triangle 24, while the second crystallographic axis 502 is perpendicular to the first crystallographic axis 501 and runs through an angle that is formed between two of the three sides of the structural triangle 24. The third crystallographic axis 503 is perpendicular to the first crystallographic axis 501 and parallel to one of the three sides of the structure triangle 24.

[0148] A tourmaline small plate 25 is cut out of the raw tourmaline crystal 20 at an angle of 90° to the first crystallographic axis 501. Thus, a normal vector 26 of a main surface of the tourmaline small plate 25 is parallel to the first crystallographic axis 501. Alternatively, a tourmaline small plate 25 can be cut from the raw tourmaline crystal 20 at an angle of 45° to the first crystallographic axis, or at any optimum angle which corresponds to the specific chemical structure of the particular type of tourmaline used. The described wristwatch 100 with the clock generator assembly 10 ensures on the one hand the advantages of a high accuracy, a compact design and an unlimited power reserve that a clock generator assembly with a quartz oscillating crystal has. On the other hand, the wristwatch does however not have a mass-produced quartz movement, so it does not have the negative image of a conventional quartz movement.

[0149] Although in the wristwatch 100 according to the described embodiment the first clock generator 1 comprises a tourmaline crystal, it is also possible that the first clock generator 1 comprises a piezoelectric oscillating crystal made of another material such as amethyst or citrine instead of a tourmaline crystal.

[0150] FIG. 4 relates to a wristwatch 100 according to a second embodiment. In FIG. 4, a piezoelectric oscillating crystal of the first clock generator 1 of the clock generator assembly 10 of the wristwatch 100 according to the second exemplary embodiment is in particular shown.

[0151] A difference between the wristwatch 100 according to the first embodiment and the the wristwatch 100 according to the second embodiment is that the piezoelectric oscillating crystal of the first clock generator 1 of the clock generator assembly 10 of the wristwatch 100 according to the second embodiment is a quartz oscillating crystal and formed as a fork oscillator 27 with two prongs 270.

[0152] The length 271 of each prong 270 is preferably 3.02127 mm, the thickness 272 of each prong 270 is preferably 0.3 mm, and the depth 273 of each prong 270 is 0.6 mm or another practical depth that does not affect the frequency. In this case, the oscillation frequency of the piezoelectric oscillator crystal, i.e. the fork oscillator 27, of the first clock generator 1 is 8888 Hz. Alternatively, the length 271 of each prong 270 can preferably also be 0.55155 mm, the thickness 272 of each prong 270 can preferably also be 0.1 mm and the depth 273 of each prong 270 can preferably also be 0.3 mm. In this case, the oscillation frequency of the piezoelectric oscillating crystal, i.e. the fork oscillator 27, is 88888 Hz.

[0153] In this case, the length 271 corresponds to the dimension of the respective prong 270 in a direction essentially parallel to the Y-crystal axis 504, the thickness 272 to the dimension of the respective prong 270 in a direction essentially parallel to the X-crystal axis 505 and the depth 273 to the dimension of the respective prong 270 in a direction substantially parallel to the Z-crystal axis 506 of the quartz oscillating crystal of the first clock generator 1.

[0154] In particular, for providing the piezoelectric oscillating crystal of the first clock generator 1, the oscillation frequency of 8888 Hz or 88888 Hz is first selected as a predetermined oscillation frequency of the piezoelectric oscillating crystal of the first clock generator 1 and then formed as the described fork oscillator 27.

[0155] The wristwatch 100 according to this exemplary embodiment has, in addition to its high clock accuracy, the additional advantage that it is individualized due to the selected frequency of 8888 Hz or 88888 Hz for the piezoelectric oscillating crystal of the first clock generator 1 and is therefore not perceived as a mass product.

[0156] It is also possible that the fork vibrator 27 is provided with another predetermined oscillation frequency. For example, the predetermined oscillation frequency may correspond to the date of birth of the owner of the wristwatch 100.

[0157] In addition to the above written description of the invention, reference is hereby explicitly made to the graphic representation of the invention in FIGS. 1 to 4 for its supplementary disclosure.

REFERENCE LIST

[0158] 1 clock generator [0159] 2 pulse counter [0160] 2′ pulse counter [0161] 2″ pulse counter [0162] 3 output device [0163] 4 second clock generator [0164] 5 temperature sensor [0165] 6 frequency divider [0166] 7 third clock generator [0167] 8 heating device [0168] 9 memory [0169] 10 clock generator assembly [0170] 11 case [0171] 12 dial [0172] 13 hand [0173] 14 connector [0174] 15 watch glass [0175] 20 tourmaline raw crystal [0176] 21 first facet [0177] 22 second facet [0178] 23 third facet [0179] 24 structural triangle [0180] 25 tourmaline small plate [0181] 26 normal vector [0182] 27 fork oscillator [0183] 100 wristwatch [0184] 101 driving device [0185] 102 mechanical time display device [0186] 103 power supply device [0187] 104 device [0188] 270 prong [0189] 271 length [0190] 272 thickness [0191] 273 depth [0192] 501 first crystallographic axis [0193] 502 second crystallographic axis [0194] 503 third crystallographic axis [0195] 504 Y-crystal axis [0196] 505 X-crystal axis [0197] 506 Z-crystal axis