EP1599765A2

EP1599765A2 - Movement

Info

Publication number: EP1599765A2
Application number: EP04714746A
Authority: EP
Inventors: Matthias Fuchs
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-01
Filing date: 2004-02-26
Publication date: 2005-11-30
Anticipated expiration: 2024-02-26
Also published as: WO2004079460A2; ATE505754T1; WO2004079460A3; DE502004012399D1; EP1599765B1; DE10309006A1

Abstract

Clock mechanism with interacting component assemblies has at least one assembly with a time measurement escapement that is designed as a removable timer module (4).

Description

CLOCKWORK

DESCRIPTION

The invention relates to a clockwork, the components of which interact in functional groups.

Various functional groups can be defined, particularly for mechanical clockworks. A functional group could be seen, for example, in a drive motor that draws its energy from an energy store. For example, a spring accumulator, a drive weight or an electric battery can be used as the energy store. Another module of the clockwork could be seen in the gear train, which has the function of a transmission gear and is used to drive various hands of the clock. The dial with different scales for the different hands could also be considered as a module. Another module can be seen in an escapement which determines the precise running of the clockwork, which is designed, for example, in the form of a pendulum, a windscreen or a balance wheel. Depending on the requirements of the application, such a timer module can also comprise part of the gear train, in particular if the wheels involved are provided solely as a transmission gear for the escapement and not for other functions of the clockwork. In the case of more complex clockworks, the components assigned to the functions of a calendar, a moon phase or sea tide display, a striking mechanism or a stopwatch could also be combined in one module.

In known clockworks, the problem arises that the entire clockwork must be dismantled in the course of repair or service work, for example during cleaning, in order to access certain parts. If only a single small component is to be replaced, the clockwork usually has to be completely disassembled and then be reassembled. This is associated with considerable costs.

The object of the invention is to improve a clockwork of the type mentioned in terms of the required service.

The solution according to the invention consists in that at least one functional group, which includes an inhibition for the time measurement, is designed as a removable timer module. Service measures such as cleaning, repair or replacement of individual components can then be carried out on the removed timer module without having to disassemble and reassemble the entire movement. In the worst case, only the service module itself needs to be disassembled and reassembled. In addition, since most of the service and repair work related to the escapement for the time measurement, there is a significant improvement in ease of servicing.

In addition, the clockwork according to the invention offers the possibility of replacing a defective or serviced timer module by another on-site, so that the clockwork according to the invention can perform its function without substantial interruption. The removed timer module can then be repaired in peace and quiet in the watchmaker's workshop in order to then return to its old place in a return campaign or, if necessary, to be replaced by a timer module of a compatible third movement that is in need of repair.

The invention also offers the possibility of exchanging a timer module with a suitable other timer module with improved or different functioning. The other timer module could, for example, be a higher quality or after contain another operating principle inhibition. This aspect would come into play especially in connection with very high-quality watch movements for enthusiasts. For these, aesthetic and / or technical aspects of the clockwork play an outstanding role. Therefore, the invention has the particular advantage in this regard that the technical function of the removed timer module can be viewed or understood particularly well and the viewer can enjoy the beauty of the clockwork and its running.

In order to demonstrate the technical functions and aesthetic aspects of the interaction of the individual components in the normal movement sequence to the viewer even when the timer module is removed, it is advantageously provided that the timer module has an auxiliary drive which maintains the running of the timer module outside the clockwork for a limited period of time ,

In a preferred embodiment, the auxiliary drive is designed as a spring drive, which can be improved even further by being able to be wound up by hand when the timer module is removed from the clockwork. The spring drive has the advantage of small dimensions with a simple structure, but can then generally only drive the timer module for a maximum of a few minutes. In order to extend the demonstration of the run of the timer module, the manual winding according to the invention is advantageous.

Since a hand-wound component that can be operated by hand would normally interfere with the built-in timer module, a special tool is advantageously provided for the manual winding, which can be brought into operative connection with a drive shaft of the spring drive. In a development of the invention, it is proposed that the spring drive in the timer module inserted in the clockwork can be wound up by a main drive of the clockwork. In this way, not only is the main drive operatively connected to the timer module, but it is also ensured that the auxiliary drive of the timer module is always in the wound state when it is removed from the clockwork.

In a preferred embodiment, the timer module comprises a small floor drive connected to the auxiliary drive and engageable with the gear train outside of the timer module and one of

Auxiliary drive driven transmission gear, which is connected to a balance wheel serving as an escapement.

In order to avoid the watch movement running too fast and its components being destroyed if the timer module is missing, a further development of the invention advantageously provides that the clockwork has a

Has auxiliary inhibition that can be activated when the timer module is removed to inhibit the main drive.

The auxiliary escapement can advantageously be designed in the form of a wind trap, since this embodiment is associated with relatively low additional costs and the lower accuracy of the auxiliary escapement is therefore not critical, since the auxiliary escapement generally only performs its task over a relatively short period of a few Minutes.

In an embodiment of the invention it is provided that the clockwork has a switching mechanism for switching on the operative connection between the auxiliary inhibition and the clockwork to be inhibited. The clockwork equipped with the switching mechanism has the advantage that the auxiliary escapement is only activated when necessary and not constantly starts to rotate. As a result, on the one hand, the auxiliary escapement is exposed to much less wear and, on the other hand, the auxiliary escapement cannot exert a negative influence on the accuracy of the clockwork.

In an embodiment of the inventive concept mentioned, it is proposed that the switching mechanism be a rotatable one

Cam plate designed clutch disc and a one-armed shift lever, the free end of which rests on a radially outer control surface of the clutch disc and the other end of which is articulated on the clockwork coaxially with a fixed clutch wheel driven by the clockwork with a fixed clutch wheel shaft, and that on the shift lever is driven by a fixed clutch wheel , Movable clutch wheel with a movable together with the shift lever clutch wheel shaft is arranged, wherein the movable clutch wheel by rotating the clutch disc and as a result of the pivoted shift lever with a drive wheel

Auxiliary inhibition can be brought into or out of engagement. The switching mechanism can be operated by turning the clutch disc. The shift lever is pivoted and the movable clutch wheel is brought into engagement with the drive wheel of the auxiliary inhibitor, the movable clutch wheel advantageously rolling on the fixed clutch wheel due to the pivoting movement of the shift lever because the axis of rotation of the fixed clutch wheel coincides exactly with the axis of rotation of the shift lever.

In a further embodiment of the switching mechanism, it is proposed that it can be switched by means of a manually operated changeover switch, which preferably has a switching wheel to be operated by means of a hand crank, which is connected to the clutch disc. The hand crank is always turned in the same direction, which is ensured by a ratchet wheel until the respective position of the clutch disc for the engaged or disengaged state is reached. Of course, for this purpose the user rotating the hand crank needs visual contact either with the clutch disc or with a suitable optical display that is operatively connected to the clutch disc.

In a preferred embodiment of the invention, the timer module is detachably attached to the clockwork by means of a type of bayonet lock, the axis of rotation of the small-bottom drive of the timer module being arranged eccentrically with respect to the axis of rotation of the bayonet lock, so that the small-bottom drive is rotated by the

The timer module can be brought into engagement with a fixed clutch wheel of the clockwork in the closed position of the bayonet catch. The principle of the bayonet lock has the advantage that the timer module is already fixed with respect to its axial position in relation to the clockwork when it is turned to lock the bayonet lock. As a result, the rotary movement can be used to engage an eccentric gearwheel in order to couple the small-floor drive acting on the auxiliary drive of the timer module with the main drive of the clockwork.

The invention can be further improved by the measure that the clockwork comprises a first locking device which prevents the timer module from being removed as long as the changeover switch does not establish the operative connection for auxiliary inhibition of the clockwork. This prevents a condition in which the movement is not connected to the inhibition of the timer module or to the auxiliary inhibition and would therefore be destroyed.

In a preferred embodiment of the first locking device it is provided that it is configured as a two-armed lever Module pawl switching arm, the first lever arm of which is designed as a pawl and the second lever arm of which is designed as a pawl switching arm, that the pawl in the locked state, by contact with a radial projection of the timer module to be fastened to the clockwork by means of a bayonet lock, prevents rotation and thus removal of the timer module, and that Pawl switching arm is operatively connected to a module pawl disc designed as a cam disc.

The measure that the module pawl disc is operatively connected to the switching mechanism is particularly advantageous, because the rotary movement of the switching mechanism can thus be easily transferred to the module disc and the switching mechanism can be used to lock or unlock the first locking device at the same time.

A further advantageous security measure consists in the fact that the clockwork comprises a second locking device, which prevents the switching mechanism from switching over as long as the timer module is not inserted correctly. This prevents the auxiliary escapement from being disengaged from the movement until the escapement of the timer module is not in engagement with the movement. Otherwise the clockwork would not be in operative connection with any escapement and could self-destruct.

In an advantageous embodiment of the second locking device, it is provided that it comprises a two-armed module securing lever, which is displaced by a radially projecting nose of the timing module when the bayonet catch is closed in such a way that a securing arm connected to the module securing lever in a rotationally fixed manner disengages from a radial securing lug Is brought module locking washer, which is in operative connection with the switching mechanism, such that when the module locking lever engages in the module locking washer, switching of the switching mechanism is blocked

In a simple embodiment, the operative connection between the module securing washer and the module pawl washer is advantageously achieved in this way; that the module locking washer is rotatably connected to the module pawl.

If the timer module can be used and removed in the area of a clock face, the user can do it in a simple and convenient manner _. can be removed without removing the movement from the watch case.

A timer module installed in the area of the clock face can only be removed if it is not covered by a hand of the watch. This is especially true for the big one

Minute hands. Although you could simply turn the minute hand out of the area of the timer module by hand, you would then have to reset the exact time after reinserting the timer module. In order to make the latter setting superfluous, a further development of the invention provides that a minute hand can be swiveled out of the area of the timer module in a clockwise direction, the correct minute display being restored automatically after swiveling in. When the minute hand is swung out, the movement continues, so that the position of the minute hand after it swings in is no different from the position it would have been without swiveling out. This property is also an advantage when winding the watch. If the pointer is directly in front of the elevator square, it can turn clockwise be rotated further without having to reset the time afterwards.

In a preferred embodiment of the pivotable minute hand, a shortened auxiliary hand is provided which is connected to a pointer shaft in a rotationally fixed manner or is at least in relatively strong frictional engagement, and which serves as a stop in the direction of rotation of the main pointer which is relatively weakly engaged with the pointer shaft. Thus, the main pointer against the direction of attack from the. The area of the timer module without changing the position of the auxiliary pointer. After reinstalling the

The main pointer will initially remain in its current position until the auxiliary pointer has caught up with it and strikes the auxiliary pointer, thus returning to its correct position, which corresponds to the current point in time.

In a modified embodiment, it would also be possible to provide a shortened auxiliary pointer which is in engagement with the pointer shaft and which can be coupled to a freely rotatable main pointer, for example by means of a magnetic coupling.

Although the design options of the invention described in detail deal almost exclusively with exemplary embodiments and variants of a timer module, the invention also includes clockworks with other removable modules for other technical functions.

In particular, the clockwork according to the invention can be improved in that it comprises a removable calendar module for displaying the calendar days. A removable moon phase module for displaying the moon phases and / or the sea tide should also be considered as an advantageous improvement. Without claim the Finally, completeness should also be pointed out to the possibility of a removable percussion module for the acoustic display of certain points in time. Such a percussion mechanism module can of course also include optical effects which expire at predetermined times or are displayed.

An embodiment of the invention is explained below with reference to the drawings. The figures show in detail:

Fig. 1: ^• A partial view of a clockwork according to the invention with inserted timer module;

2: another partial view of the same clockwork with a representation of the gear train for an auxiliary escapement;

3: a further partial view of the clockwork according to the invention with the auxiliary inhibition switched on and the timer module removed;

FIG. 4: a view corresponding to FIG. 3, but with the timer module inserted and auxiliary inhibition switched off;

5 shows a partial view of the same clockwork in the same state as FIG. 4 with details of the switching mechanism;

6: as in FIG. 5, but with different details of the switching mechanism;

7: a side view of the same clockwork according to the viewing direction designated VII in FIGS. 4 to 6.

1 and 2 show a drive wheel 20 which is operatively connected to the hour hand of the watch and a minute wheel 21. As indicated in FIGS. 1 and 2, the drive wheel 20 is driven by a weight 22. FIG. 1 contains a partial view of a removable timer module 4. This shows a small-bottom drive 12 to be driven by the clockwork, which cooperates with a small-bottom wheel 23 via a spiral spring (not shown). A second wheel 24 acts as a transmission gear on an escapement wheel 25 which interacts with a balance wheel (not shown) and an escapement element (not shown), such as an armature or spring. An intermediate clutch wheel 72 is used to transmit the drive from the minute wheel 21 to the small floor drive 12.

As can be seen in Figure 2, the fixed clutch wheel 72 acts on a movable clutch wheel 75, which in contrast to the fixed

Clutch wheel 72 is arranged so that its axis of rotation can be shifted according to the direction of arrow 26. This makes it possible to bring the movable clutch wheel 75 either into or out of engagement with the gear train 27 of an auxiliary escapement. The auxiliary escapement consists of a transmission gear 27 and a windscreen 28

Auxiliary inhibition is always switched on by moving the movable clutch wheel 75 when the timer module 4 is removed from the clockwork, so that an uncontrolled and destructive rapid running of the clockwork can advantageously be avoided.

The connection mechanism for the auxiliary inhibition and two securing mechanisms are explained in more detail with reference to FIGS. 3 to 7.

In the illustration in FIG. 3, the timer module 4 has been removed. One recognizes the fixed clutch wheel 72, which is mounted on a fixed clutch wheel shaft 73 and interacts with the movable clutch wheel 75 and its movable clutch wheel shaft 76. The movable clutch wheel shaft 76 is fastened to a shift lever 77 which can be pivoted in the direction of arrow 26 and, when pivoted, the movable clutch wheel shaft 76 together with the movable one Clutch wheel 75 moves. The shift lever 77 is pivoted by means of a clutch disk 61 designed as a cam plate, on the circumferential surface of which the free end 78 of the shift lever 77 rests under spring tension. The clutch disc 61 has two radial depressions on its circumference, which are arranged at a distance of 180 degrees to one another.

In the switching state shown in FIG. 3, the end 78 of the shift lever 77 bears against a point on the circumferential surface of the clutch disc 61 in which the shift lever 77 is pressed downward. The movable clutch wheel 75 comes into engagement with the drive wheel 133 of the auxiliary escapement. As will become apparent from the following description, the clutch disc 61 can only be rotated counterclockwise, but a locking device described below prevents the clutch disc 61 from rotating as long as the clock module 4 is not inserted into the clockwork.

4 shows the timer module 4 inserted into the clockwork, which is inserted axially into a circular cutout of a module mounting base plate 1 and then rotated counterclockwise until the radially projecting lugs 5 and 9 of the timer module 4 rest against a stop 2 in the direction of rotation. One because of the

Clarity in Figure 4, not shown, but shown in Figure 7 module bracket cover 3 covers the lugs 5, 6, 8, 9, so that the timer module 4 is locked in the axial direction. When the timer module 4 is turned counterclockwise while being inserted into the clockwork, the small-bottom drive 12 comes into engagement with the fixed clutch wheel 72, so that the inhibition of the timer module 4 is now connected to the rest of the clockwork and is effective. The auxiliary escapement 27, 28 is no longer necessary and can be switched off. In order to enable the shutdown, the locking device preventing rotation of the clutch disc 61 must be unlocked. This also occurs due to the rotation of the timer module 4 in the counterclockwise direction, a lug 6 of the timer module 4 actuating a module locking lever 53, which is thereby rotated clockwise about a module locking lever shaft 55. A securing arm 54 can also be rotated about the same shaft 55, which is non-rotatably connected to the module securing lever 53 and forms a two-armed lever with this movement. In the aforementioned movement, the free end of the securing arm 54 comes out of engagement with a securing lug 11, which acts as a radial projection on one Module lock washer 57 is formed. By means of a switching mechanism to be described in more detail below, the module locking washer 57 can now be rotated clockwise, as a result of which the mechanism also

Rotation of the clutch disc 61 counterclockwise causes until the free end 78 of the shift lever 77 engages in the radial recess on the circumference of the clutch disc 61. The shift lever 77 is pivoted upward and the movable J clutch wheel 75, which is pivoted, disengages from the drive wheel 133 of the auxiliary escapement, which is thereby deactivated.

The module locking washer 57 is seated on a module locking shaft 58, by means of which it is connected in a rotationally fixed manner to a module pawl disc 56 mounted on the same module locking shaft 58. When the module locking disk 57 is rotated with the aid of the switching mechanism, the module pawl disk 56 is thus simultaneously rotated clockwise. The module pawl disk 56 serves as a cam disk for controlling a pawl switching arm 51 which rests under spring tension on the radially outer peripheral surface of the module pawl disk 56. The module pawl disk 56 has two radially projecting and with respect to the module detent shaft 58 on oppositely arranged sectors which merge into two likewise oppositely arranged, radially recessed sectors, the angular range of which is approximately twice as large as that of the radially projecting sectors.

The pawl switching arm 51 is rotatably arranged about a pawl shaft 52. Around the same pawl shaft 52 there is a pawl 50 which is connected to the pawl switching arm 51 in a rotationally fixed manner. In the switching position shown in FIG. 4, the pawl switching arm 51 is activated by the radially projecting sector of the module pawl disk 56. pivoted counterclockwise, the free end of the pawl 50 pivots in the area of the timer module 4 and comes to rest adjacent to a radial projection 10 of the timer module 4. The pawl 50 thus prevents the timer module 4 from rotating clockwise, so that it cannot be removed from the clockwork in the switching state shown. This in particular prevents the small-bottom drive 12 from disengaging from the fixed clutch wheel 72, which would result in the watch movement running destructively fast.

In Figure 7 you can see the module pawl disc 56, which cooperates with the pawl switching arm 51, and the one with the

Module pawl disc 56 rotatably connected module locking washer 57, which interacts with the locking arm 54. The securing arm 54 is connected in a rotationally fixed manner to the module securing lever 53 via the module securing lever shaft 55, while the pawl switching arm 51 is connected in a rotationally fixed manner to the pawl 50 via the pawl shaft 52

Module pawl disk 56 and module locking washer 57 are in turn non-rotatably connected to a disk wheel 59 for module locking via the module locking shaft 58. With the interposition of a reversing gear 63 mounted on a reversing gear shaft 64, this is Disc wheel 59 connected to a ratchet wheel 66 for the module detent, which is arranged on a ratchet shaft 13. The ratchet shaft 13 is rotated clockwise when the switching mechanism is actuated, the reversing wheel 63 ensuring that the disk wheel 59 also rotates clockwise for the module lock together with the module pawl disk 56 and the module locking disk 57

The interaction of ratchet wheel 66 for module engagement, reversing wheel 63 and disk wheel 59 is shown in a top view in FIG. 5. FIG. 5 also shows a ratchet wheel 67 which interacts with a ratchet 69, which acts on the ratchet wheel radially from the outside inwards by means of a ratchet spring 70, in such a way that rotation of the ratchet shaft 13 and thus of the ratchet wheel 66 is prevented in the counterclockwise direction , In the clockwork shown, the clockwise rotation takes place by means of a hand crank, not shown, which is arranged in the region of the clock face, not shown. Instead of the hand crank, a key or a knurled button can also be provided.

As can best be seen in FIG. 7, a ratchet wheel 65 for the gear train clutch is also mounted on the ratchet shaft 13, which rotates clockwise when the ratchet shaft 13 is actuated. The ratchet wheel 65 is in engagement with a disk wheel 60 for the gear train clutch, which is rotatably connected to the clutch disk 61 by means of a gear train clutch shaft 62. When the gear wheel shaft 13 is rotated clockwise together with the gear wheel 65, the disk wheel 60 rotates together with the

Clutch disc 61 counterclockwise. The interaction of ratchet shaft 13, ratchet wheel 65 and disk wheel 60 for the gear train clutch and the clutch disk 61 can also be seen in the top view of FIG. 6. As can also be seen in ^"Figure 7, the supporting frame is formed for all the above-described components of three boards, namely a dial-side circuit board 156, a middle plate 157 and a rear board 158, each arranged by various pillars at a distance from one another and fixedly connected are. In particular, one can see in FIG. 7 a pillar 151, which connects the dial-side board 156 to the middle board 157, and a pillar 152, which connects the middle board 157 to the rear board 158. Furthermore, one recognizes a module support pillar T, which, among other things, also supports the module support base plate 1 the middle board 157 connects.

LIST OF REFERENCE NUMBERS

Module mounting base plate

attack

Module holding cover plate

Timer module

nose

Module support pillar.

nose

Radial projection nose

securing lug

Kleinboden engine

Schaltradwelle

drive wheel

Minute wheel and drive

drive weight

Small ground wheel with auxiliary drive

Seconds wheel and drive

Escapement wheel and drive

arrow

up gear

Windscreen with shoot

pawl

Sperrklinkenschaltarm

Pawl shaft

Module safety lever

securing arm

Modulsicherungshebelwefle Module pawl disc Module lock washer Module detent shaft Disc wheel for module detent Disc wheel for gear train clutch Coupling disc Gear train clutch shaft Reverse gear for module fixture Reverse gear shaft Shift gear for gear train clutch Shift gear for modular lock gear Locking gear shift pawl Gear ratchet spring fixed clutch gear fixed clutch gear shaft movable clutch gear movable clutch gear shaft gear lever clutch lever free end platinum gearshift lever free end.

Claims

1. Clockwork, the components of which work together in functional groups, characterized in that at least one functional group, which includes an escapement for the time measurement, is designed as a removable timer module (4)

_, is.

2. Clockwork according to claim 1, characterized in that the timer module (4) has an auxiliary drive (23) which maintains the running of the timer module (4) outside the clockwork for a limited period of time.

3. Clockwork according to claim 2, characterized in that the auxiliary drive (23) is designed as a spring drive.

4. Clockwork according to claim 3, characterized in that the auxiliary drive (23) can be wound up by hand when the timer module (4) is removed from the clockwork.

5. Clockwork according to claim 4, characterized in that a special tool is provided for the manual winding, which can be brought into operative connection with a drive shaft (12) of the spring drive (23).

6. Clockwork according to one of claims 3 to 5, characterized in that the spring drive (23) in the clock module inserted in the clockwork (4) by a main drive (20, 21, 22) of the clockwork can be wound.

7. Clockwork according to one of the preceding claims, characterized in that the timer module (4) with a

Auxiliary drive (23) connected and connected to the gear train (72) outside of the timer module (4), which can be brought into engagement, comprises a small-bottom drive (12) and a transmission gear (24, 25) driven by the auxiliary drive (23), which is operatively connected to a balance wheel serving as an inhibitor.

8th. . Clockwork according to one of the preceding claims, characterized in that it has an auxiliary escapement (27, 28) which can be activated when the timer module (4) is removed to inhibit the main drive (20, 21, 22).

9. Clockwork according to claim 8, characterized in that the auxiliary escapement (27, 28) has a windscreen (28).

10. Clockwork according to claim 8 or 9, characterized in that it has a switching mechanism (13, 65, 60, 61, 77) for switching on the active connection between the auxiliary inhibitor (27, 28) and the clockwork to be inhibited.

11. Clockwork according to claim 10, characterized in that the

Shift mechanism a clutch disc (61) designed as a rotatable cam disc and a one-armed shift lever (77). has the free end (78) on a radially outer control surface of the clutch disc (61) and the other end on the clockwork coaxially with a fixed driven by the clockwork

Clutch wheel (72) is articulated with a fixed clutch wheel shaft (73), and that a movable clutch wheel (75) driven by the fixed clutch wheel (72) is arranged on the shift lever (77) with a clutch wheel shaft (76) movable together with the shift lever (77) , the movable

Clutch wheel (75) by turning the clutch disc (61) and as a result of the shift lever (77) pivoted with a Drive wheel (133) of the auxiliary escapement can be brought into or out of engagement.

12. Clockwork according to claim 10 or 11, characterized in that the switching mechanism can be switched by means of a manually operated changeover switch, which preferably has a switching wheel (65) to be operated by means of a hand crank or key or knurled knob, which is connected to the clutch disc (61).

13. Clockwork according to one of claims 8 to 12, characterized in that the timer module (4) by means of a kind

Bayonet lock is releasably attached to the clockwork and that the axis of rotation of the small-bottom drive (12) of the timer module (4) is arranged eccentrically with respect to the axis of rotation of the bayonet lock, so that the small-bottom drive (12) by turning the timer module (4) into the closed position of the

Bayonet lock can be engaged with a fixed clutch wheel (72) of the clockwork.

14. Clockwork according to claim 10 or 11, characterized in that it comprises a first locking device which prevents removal of the timer module (4) as long as the

Switch does not establish the operative connection for auxiliary locking (27, 28) of the clockwork.

15. Clockwork according to claim 12, characterized in that the first locking device comprises a module pawl switching arm (51) designed as a two-armed lever, the first lever arm of which

Pawl (50) and its second lever arm is designed as a pawl switching arm (51) that the pawl (50) in the locked state by contacting a radial Projection (10) of the timer module (4) to be attached to the clockwork by means of a bayonet lock prevents rotation and thus removal of the timer module (4), and that the pawl switching arm (51) is in operative connection with a module pawl disk (56) designed as a cam.

16. Clockwork according to claim 15, characterized in that the

Module pawl disc (56) is in operative connection with the switching mechanism.

17. Clockwork according to one of claims 10 to 12, characterized in that it comprises a second locking device which prevents switching of the switching mechanism as long as the timer module (4) is not inserted correctly.

18. Clockwork according to claim 17, characterized in that the second locking device comprises a two-armed module securing lever (53), which of a radially projecting nose (6)

Timer module (4) is displaced when the bayonet catch is closed in such a way that a securing arm connected to the module securing lever (53) in a rotationally fixed manner. (54) is brought out of engagement with a radial locking lug (11) of a module locking washer (57) which is connected to the switching mechanism in

The active connection is such that when the module locking lever (53) engages in the module locking washer (57), switching of the switching mechanism is blocked.

19. Clockwork according to claim 18, characterized in that the module locking washer (57) with the module pawl disc (56) is rotatably connected.

20. Clockwork according to one of the preceding claims, characterized in that the timer module (4) can be used and removed in the area of a dial of the clockwork

21. Clockwork according to claim 20, characterized in that a minute hand from the area of the timer module (4) in

Can be turned clockwise, the correct minute display is then restored automatically.

22. Clockwork according to claim 21, characterized in that a shortened auxiliary pointer is provided which is rotatably connected to a pointer shaft or at least in a relatively strong

Frictional engagement is and the main pointer, which is in relatively weak frictional engagement with the pointer shaft, acts as a stop in. Direction of rotation is used.

23. Clockwork according to claim 21, characterized in that a shortened auxiliary pointer engaged with the pointer shaft can be coupled to a freely rotatable main pointer, for example by means of a magnetic coupling.

24. Clockwork according to one of the preceding claims, characterized in that it comprises a removable calendar module for displaying the calendar days.

25. Clockwork according to one of the preceding claims, characterized in that it has a removable moon phase module for displaying the moon phases and / or the sea tide.

26. Clockwork according to one of the preceding claims, characterized in that it has a removable striking mechanism module for the acoustic display of certain times.