FR2535869A2 - Programmer control device. - Google Patents

Abstract

The present invention relates to a programmer control device, comprising a rotating cam block able to be driven in rotation step by step by a feed cam actuating an oscillating pawl carrier. The control device comprises means for preventing and authorising the action of the pawl, comprising a prevention lever 50' interacting with means capable of making the said prevention lever tilt, on each to-and-fro movement of the feed pawl, between two angular positions. In the first position, a part 51' of the prevention lever is arranged on the trajectory of a ramp 55 of the pawl 21, in order to prevent the action of the latter. In the second position, the part 51' is not arranged on the trajectory of the pawl 21, in order to authorise the action of the latter. Retaining means such as the jaw 79a of an authorising lever 69a, actuatable, for example, with a time delay, are able to retain the interdiction lever 50' in its second angular position, against the action of the spring 49, in order to authorise the action of the pawl 21 after a certain time delay period. The invention can be used in particular to control a washing machine or a dishwasher.

Description

The present invention relates, as in the main patent, to the programmer control devices, comprising a rotary program cam block capable of being driven in stepwise rotation by a stepwise advance device comprising an oscillating support provided for oscillate at each revolution of a feed cam. This oscillating support supports at least one advance pawl capable of cooperating, under the action of an elastic means, with a toothed mobile kinematically linked to the program cam block. Means are provided for, sometimes prohibiting, sometimes authorizing, the action of the advance pawl on the toothed mobile,
In programmers control devices known to this type, such as that described in French patent NO 2 162 073, the means provided for preventing the action of the advance pawl, on the toothed mobile kinematically linked to the program cam block, are constituted by a return spring which tends to constantly prevent the pawl from coming into engagement with the teeth of the toothed mobile. The means provided to authorize, on the contrary, the action of this advance pawl, consist of an elastic lever intended to be actuated by an electromagnet. When the electromagnet is excited, the lever pushes the pawl forward, against the action of the return spring, until this pawl engages the toothed mobile and can then actuate it with a tooth at each of its back and forth. Such a device has certain drawbacks. Indeed, it is necessary that the electromagnet has sufficient power, therefore a relatively large size, to not only overcome the resistance of the return spring, but also elastically maintain the pawl in engagement with the teeth of the toothed mobile, during each back and forth of this ratchet. The electrical power required to actuate such an electromagnet is therefore not negligible and the latter cannot be actuated directly by an electronic control circuit of very low power.

 The programmer control device, the subject of the main patent and of this addition, is characterized in that the prohibition and authorization means comprise a prohibition lever cooperating with means capable of causing the lever to tilt. prohibition, each time the ratchet moves back and forth between two angular positions.

In the first angular position, part of the prohibition lever is arranged on the path of the advance pawl, respectively of the oscillating support, to prevent the action of this pawl on the toothed mobile.

In the second angular position, said part of the prohibition lever is not disposed on the path of the advance pawl, respectively of the oscillating support, so as to authorize the action of this pawl on the toothed mobile. The prohibition and authorization means further comprise retaining means, actuable instantaneously and / or in a timed manner, capable of retaining the prohibition lever in its first position, respectively in its second position, at an instant when said lever occupies said position, a return spring constantly tending to return said lever to its other position.

 The programmer control device, object of this addition, is applicable in cases where the toothed mobile cooperating with the advance pawl is constituted by a first toothed ring integral with the cam block on which is rotatably mounted at least one displaceable ring in rotation under the action of another advance pawl disposed on the same oscillating support as the first. It is characterized by the fact that the retaining means, which can be actuated after any one of several predetermined time periods, comprise an oscillating arm comprising an actuating spout intended to be lifted by each tooth of a toothed crown secured to the first part of the cam block, crown placed next to the first crown, against the action of an elastic means. Said oscillating arm supports a counting mobile, pivoting, and, on the side of this mobile, opposite the spout actuation, authorization levers mounted side by side pivoting on a common axis, identical in number to the predetermined time periods. The counting mobile constantly tends to be angularly brought into abutment against a fixed abutment, under the action of an elastic means, and comprises, on its periphery, driving wolf teeth arranged in the path of at least one drive finger integral with the rotating ring, so that the counting mobile advances a tooth with each passage of a finger. A first authorization lever comprises a first spout, non-return, which cooperates successively , under the action of an elastic means, with each of the wolf teeth driving the counting mobile or with other wolf teeth concentric with the previous ones, one of which is deeper than the others.

The other authorization levers are capable, under the action of elastic means, of cooperating respectively, either, by a first spout, with cams arranged one against the other, forming part of the counting mobile and each comprising a notch of depth substantially equal to that of the deeper wolf tooth, either, by the same first beak or by another beak, with stops offset relative to each other in the direction of the toothed crown. The notches and the deeper tooth of the wolf are offset angularly with respect to each other. The stops are formed either by the profile of at least one solid selection cam of the first part of the cam block , or by parts of the timing selection sink comprising a spout cooperating, under the action of an elastic means, with said profile of the selection cam, the latter comprising as many levels as there are periods predetermined time delays. Each authorization lever comprises a second retaining spout, capable, when the first corresponding spout cooperates with the deeper wolf tooth, respectively with the notch of one of the cams, to retain part of the prohibition lever when that here, against the action of its elastic means, occupies its second angular position, of rotation. A fixed stop is placed on the path followed by the authorization levers, during the pivoting of the oscillating arm which supports them, under the effect of rotation, of a tooth, of the toothed crown intended to actuate said arm, in order, on the one hand to release the retaining spout, from the trajectory of the prohibition lever, on the other hand to release, from the counting mobile, the first spout of the first authorization lever and / or any of the respective first spouts of the other authorization levers.

 The present invention proposes, as in the main patent, to allow the production of a programmer control device, the means provided for automatically prohibiting or authorizing the step-by-step advance of the cam block, not only can be actuated by requiring only a very small effort, while having a sufficiently small footprint to be, if necessary, housed entirely inside the cam block programs in the case where it is hollow, but still are interchangeable, and even usable simultaneously in certain cases, and adaptable on a single step advance device, each one thus being able to be adapted to a specific need without completely calling into question the structure of the rest of the device.

 The appended drawing illustrates, by way of example, an alternative embodiment of the main patent.

Fig. 1 shows this variant, plan view, in next section
II of fig. 2.

 Fig. 2 shows the same variant, in left view of FIG. 1, cut cam block.

 Fig. 3 shows, on a larger scale, part of FIG. 1, at the time of the end of a delay period.

 Figs. 4 and 5 represent the same variant, in two different operating phases.

 As shown in Figs. 1 to 5, the programmer control device according to the invention comprises, as in the main patent, a rotary program cam block 5 which, in this example, is hollow and is held axially and radially between two plates 6 and 7 in metal. Inside this rotary cam block 5, is arranged a micro motor 8 which is secured to the plate 7 by pillars 9. This micromotor 8 carries on its output shaft a toothed pinion 131 which is susceptible, by intermediate of a reducing gear 13, to rotate a toothed wheel 14 integral with a feed cam 15 having for example a spiral profile. The micromotor 8 thus rotates for example, at 750 rpm ., and the advance cam 15, at 1 turn / sec. Against the profile of the cam 15, is constantly maintained in support, by a spring 74, a 'drive finger 16 which is part of an oscillating support 17 supporting, in this example, three advance pawls 21, 22, 23 arranged side by side, pivoted around a common shaft 18 fixed on the support 17.

 As shown in fig. 1 to 5, as in the main patent, the first advance pawl 21 constantly tends, under the action of a spring 24, to cooperate with the wolf teeth of a first toothed ring 31 secured to the inner periphery d 'a first part 1 of the cam block 5. The second advance pawl 22 constantly tends, under the action of another spring 24, to cooperate with the smooth inner periphery of a cylindrical extension 26 provided on a cylindrical ring which constitutes the second part 2 of the program cam block 5. This second part 2 is rotatably mounted on the first part 1. It supports the profiles of the so-called "fast" cams. Two diametrically opposed orifices 30 pass right through the extension 26 and are intended to allow the spout of the pawl 22 to pass, which can then cooperate with a second toothed ring 32 secured to the first part 1 of the cam block 5. In this example, the second toothed ring 32 is formed by the extension of the first 31. Some s teeth of this ring gear 32 are removed. The third advance pawl 23 constantly cooperates, under the action of another compression spring 24, on the one hand with a third ring gear 33 secured to the inner periphery of a rate reduction ring 3, rotatably mounted inside the second part 2 of the cam block 5, on the other hand, through orifices 40 passing right through this rotary ring 3, with a fourth toothed ring 34 integral with the second part 2. The reduction ring 3 is in fact supported on the top of the teeth of the fourth toothed ring 34 and it comprises, in this example, fifteen orifices 40 distributed around its periphery. The fourth toothed crown 34 is thus placed immediately behind the fifteen orifices 40. The four toothed crowns each have sixty teeth. The profiles of the cams supported by the first and second parts, 1 and 2, of the cam block 5 cooperate with levers -bascules 45 actuating themselves switches not shown in the drawing.

 The control device comprises, in the variant described in this addition, a prohibition lever 50 'which is pivotally mounted around the axis 54. The lever 50' has three arms 51a, 52a, 53a. The first arm 51a has a finger 51 'intended to cooperate with the ramp 55 forming part of the first pawl 21, to move said pawl 21 away from the teeth of the toothed crown 31, when the prohibition lever 50' occupies its first angular position , prohibition (fig, 4), under the action of its elastic means 49. In this variant embodiment, the stop 56 (fig. 1) of the advance pawl 21 has no role to play and is therefore not intended, as in particular in the first embodiment of the main patent, to come into abutment against the finger 51 'to bring, at the end of advance of the pawl 21, the prohibition lever 50', in its second angular position, d 'authorization (fig. 1, 3, 5). The means capable of thus tilting the prohibition lever (50 ′), between its first and its second angular position, against the action of its elastic means 49, each time the advance ratchet 21 moves back and forth, are constituted by a rotary cam 115 called "authorization", intended to cooperate with a part of the prohibition lever 50 ', constituted by the third arm 53a of this lever. This authorization cam 115 is integral with the cam d advance 15 and therefore rotate, along 4, at the same speed as it. It has a high level 115 'angularly fixed so that its front part 115a pushes the third arm 53a of the prohibition lever 50' to bring the latter into its second position, for authorization, as soon as the first pawl d 'advance 21 has made a sufficient advance to have exceeded its point of possible attachment with the next tooth of the ring gear 31. The rear part 115b of the high level 115' is provided so as to release the third arm 53a when the first pawl 21 has made all its advance.

 In the present embodiment, there are, as in the main patent, two kinds of retaining means, capable of being actuated simultaneously.

 First retaining means are constituted, as in the main patent, by a part of the movable armature of an electromagnet 60. it is, for example, the end part 61 of a plunger core. The trajectory of this part 61 is such that the latter is capable of cutting the trajectory of the second arm 52a of the prohibition lever 50 ', when the latter, against the action of its spring 49, occupies its second angular position, d 'authorization, so as to retain it in this second position as shown in fig. 5. The part 61 is also capable of coming to bear against part of the second arm 52a, against the underside 76 thereof in this example, in a waiting position, when the prohibition lever 50 'occupies its first angular position or while it switches between its two angular positions.

Without departing from the scope of the present invention, the first retaining means, instantaneously actuable, can be constituted by a part 180 of a mechanical control element, for example movable ma
for example / only, constituted by a first end of a flexible sliding element 181, represented by dotted lines in FIG. 1, whose second ex end opposite the first is actuable by a push button not shown in the drawing. The part 180 has a trajectory such that it is capable of cooperating with the prohibition lever 50 ′ by cutting the trajectory of this lever when the latter, against the action of its elastic means 49, occupies its second angular position, authorization, so as to retain it in this second position. Another solution would be to have, as shown in dotted lines in FIG. 3, the mechanical control element 181 which can be moved manually, so that its part 180 has a trajectory such that it can, at will, push back along 182 and maintain the prohibition lever 50 'in its second angular position, authorization, against the action of its elastic means 49.

 Without departing from the scope of the present invention, the mechanical control element 181, which may or may not consist of a flexible sliding element, could be actuated, not manually, but in particular by temperature, level, pressure, and / or by one or more cams angularly linked to the cam block.

 The second retaining means are different from those described in the first embodiment of the main patent. They can be activated after any one of several predetermined time periods. They comprise an oscillating arm 65 'shown entirely in FIG. 3 only. This arm 65 ', pivoted around a shaft 65a, comprises an actuating spout 66' intended to be lifted by each tooth of a fifth toothed crown 35, against the action of an elastic means 75 '. This ring 35 is integral with the cam block 5 and is constituted by an extension of the first toothed ring 31. The oscillating arm 65 ′ supports a counting mobile 167, pivotally mounted, and, on the side of this mobile, opposite the spout 'actuation 66', authorization levers, three in this example, 69a, 69b, 69c, mounted side by side pivoting on a common axis 70 '(fig. 1), identical in number to the predetermined time periods.

 The counting mobile 167 constantly tends to be angularly displaced in the opposite direction from 83, in order to bring its finger 88 into abutment against a stop 71 ', under the action of an elastic means 72' (fig. 3). it includes, on its periphery, driving wolf teeth 168 arranged on the path of at least one driving finger 73, two in this example.

These fingers 73 are integral with the rotating ring 2, so that the counting mobile 167 advances by one tooth at each passage of a finger 73, along 122.

 As shown in particular in FIG. 3, the first authorization lever 69a comprises a first non-return nozzle 77a, which cooperates successively, under the action of an elastic means 78v (fig. 1) with other teeth of wolf 169 concentric to the previous 168, one of which 170 is deeper than the others. Without departing from the scope of the present invention, the first non-return spout. 77a could cooperate, not with the teeth 169, but with the driving wolf teeth 168 which, in this case, would have the tooth 170 deeper than the others.

 The other authorization levers 69b, 69c respectively comprise first nozzles 77b, 77c capable of cooperating respectively, under the action of elastic means 78 ′, either with stops 152, 153 offset relative to one another in direction of the ring gear 31, either with cams 162, 163, pressed one against the other, forming part of the counting mobile 167. The stops 152, 153 are, in this example, integral with a selection lever timer 90 'pivotally mounted coaxially, for example, with the swing arm 65'. The cams 162, 63 63 each have on their periphery a notch, respectively 162 ′, 163 ′, of depth substantially equal to that of the deeper wolf tooth 170.

These notches 162 '163' and the deeper wolf tooth 170 are angularly offset from one another.

 The timing selection lever 90 'has a spout 96' which constantly cooperates, under the action of elastic means 96a, with a selection cam 95 (fig. 1 to 3) integral with the inner periphery of the first part 1 of the cam block 5. This cam 95 comprises, in this example, three levels, as many as there are predetermined time periods: a high level 95 ′, an average level 95 ″, a low level 95 ″ ’.

 Each authorization lever 69a, 69b, 69c comprises a second beak, respectively 79a, 79b, 79c, for retaining, capable, when the first corresponding beak 77a, 77b, 77c cooperates with the deeper wolf tooth 170, respectively with the 'notch 162', 163 'of one of the cams 162, 163, of retaining the third arm 53a of the prohibition lever 50', at a time when the latter, against the action of its elastic means 49, occupies its second angular position, for authorization.

 A fixed stop 81 ′ is disposed on the plate 7. It is disposed on the path followed by a projecting part 150provided on each of the authorization levers 69a, 69b, 69c, during the pivoting of the oscillating arm 65 ′ which supports them, under the effect of the following rotation 122, of a tooth, of the ring gear 35 intended to actuate said arm The stop 81 'is, in this example, constituted by the side of the electromagnet 60.

 When the micromotor 8 (fig. 2) is supplied, the advance cam 15 and the authorization cam 115 perform according to 466 revolutions per minute, and the oscillating support 17, as well as the three advance pawls 21, 22, 23, oscillate sixty times a minute between a rear position and a front position.

 We can consider three successive phases in the operation of the first advance pawl 21. During the first phase, the advance pawl 21 starts from its rear position (fig. 4) in which its ramp 55 is pressed against the finger 51 'of the prohibition lever 509. The latter occupying its first position, prohibition, under the action of its elastic means 49 (fig. 4), the pawl 21 is lifted out of the teeth of the ring gear 31. it thus remains raised during its entire first phase of movement which ends when it occupies the position shown in dotted lines in FIG. 5, that is to say when it has made a sufficient advance to have exceeded its possible point of attachment with the next tooth of the ring gear 31.

 At this instant, at the start of the second phase, as shown in FIG. 5, the front part 115a of the high level 115 ′ of the authorization cam 115 comes into contact with the third arm 53a and causes the prohibition lever to tilt in its second authorization position. The finger 51 'according to the first pawl 21 which falls on the front flank of a tooth of the crown 31 (fig. 5) and then slides to the foot of the same tooth, to occupy its front position shown in fig . 1, without driving the crown 31 in rotation.

 The third operating phase of the pawl 21 begins at this instant when the advance cam 15 abruptly releases the oscillating support 17 and when the rear part 115b of the high level of the authorization cam 115 releases the third arm 53a of the lever. prohibition 50 'which resumes, therefore, its first position, prohibition. The pawl 21 is then again in the rear position (fig. 4), at the start of phase 1, lifted by the finger 51 '.

 To reach this rear position, the pawl 21 is capable of following in particular two trajectories. In the case where the oscillating support 17 is released before the prohibition lever 50 ', the pawl of the pawl 21 moves back by rubbing against the tooth of the crown 31, and falls back behind this tooth, the ramp 55 coming to bear against the finger 51 'and remaining there when the prohibition lever 50 is released in turn in its first position, prohibition. In another case where the prohibition lever 50 ′ is released before the oscillating support 17, the pawl of the pawl 21 is immediately raised under the action of the finger 51 ′ and it therefore does not rub against the tooth of the crown 31 during its third phase of operation, its ramp 55 rubbing, on the other hand, against the finger 51 '.

 During this time, as in the main patent, the second pawl 22 remains in abutment against the smooth periphery of the extension 26. The third pawl 23, at each of its oscillations, drives a tooth, along 122, the third toothed crown 33 of the reduction ring 3 which thus performs one revolution in one minute. Taking into account the fifteen orifices 40, the third pawl 23 drives, every four teeth, through these orifices 40, one tooth each time, the fourth toothed crown 34 of the second part 2 which thus performs one revolution in four minutes .During each turn of this second part 2, the second pawl 22 falls successively in each of the two orifices 30 and, each time, drives with a tooth the second toothed crown 32 of the first part 1 of the cam block 5 which thus advances one step every two minutes.

 At each half-turn of the ring 2, every two minutes, a drive finger 73 rotates along 83, of a tooth 168, the counting mobile 167 which thus leaves its starting position, against the action of its spring 72 '. After this advance, the counting mobile 167 is held angularly by the first non-return spout 77a. During the next advance, one step, along 122, of the first part 1 of the cam block 5, the fifth ring gear 35 lifts, against the action of the spring 75 ', the spout 66' of the swing arm 65 '. The protruding part 150 of the first authorization lever 69a then comes to bear on the fixed stop 81 ', which makes the lever 69a pivot in the opposite direction to 83. The first non-return spout 77a is thus released from the wolf teeth 168 , which releases the counting mobile 167 which, under the action of its spring 72 ', returns to the starting position.

 When the location of a tooth removed from the second toothed ring 32 arrives vis-à-vis the second pawl 22, the latter, at the moment when one of the two orifices 30 is in front of it, cannot cause d 'a tooth the second ring gear 32 and the first part 1 of the bloccames 5 which remains stationary. It is the same each time an orifice 30 is again presented in front of the second pawl 22. Meanwhile, at each passage of one of the fingers 73, every two minutes, the coma tation mobile 167 is driven d 'a tooth and is each time maintained in its new angular position by the first non-return spout 77a.

 The second spout 79a of the authorization lever 69a, as well as the second spouts 79b and 79c of the other authorization levers occupy, at the same time, a position in which they are not in the path of the third arm 53a of the lever d 'ban 50'. The latter therefore continues to pass through its first and second angular positions, at each revolution of the authorization cam 115.

 At the end of the time-out period, one of the first nozzles 77a, 77b, 77c finally falls into the deeper tooth 170, the notch 162 'or the notch 163' respectively. The choice of spout depends on the position of the stops 152 and 153, that is to say on the position of the spout 96 'of the timing selection lever 90', on one of the levels 95 ', 95 "or 95 "'of selection cam 95.

 If the spout 96 ′ is for example pressing on the high level 95 ′ of the selection cam 95, as shown in FIGS. 1 and 3, the first nozzles 77b and 77c are retained spaced from the counting mobile 167 by the stops 152 and 15 respectively. These first nozzles cannot therefore fall into the notches 162 ′ and 163 ′ when these reach opposite 'them. Only the first nozzle 77a, which also serves as a non-return, is free to fall into the deeper tooth 170 when the latter is presented in front of it, which corresponds to the end of the longest time-out period. At the same time, the corresponding second nozzle 79a comes on the trajectory of the third arm 53a of the prohibition lever 50 ', while the latter is held in its second position, for authorization, by the authorization cam 115 ( As soon as the pawl 21 reaches its front position, the authorization cam 115 releases the third arm 53a which is then held in the same second position by the second spout 79a.

The pawl 21 then returns to its rear position and then oscillates again to its front position, driving the next tooth while the authorization cam 115 comes again to hold the prohibition lever 50 'in its second authorization position. . The displacement of the pawl 21 towards its front position causes a tooth to rotate, not only the toothed crown 31, but also the toothed crown 35 which is integral therewith. The swing arm 65 'is therefore raised by its spout 66', the projecting part 150 of the authorization lever 69a comes to bear against the fixed stop 81 ', and the authorization lever 69a rocks in the opposite direction from 83, its second spout 79a releasing the third arm 53a of the prohibition lever 50 'which remains held in its authorization position, by the authorization cam 115. At the same time, the first non-return nozzle 77a of the first authorization lever 69a is released from the deeper tooth of the wolf 170 and the counting mobile 167 can turn in the opposite direction from 83 to return to the starting position in abutment against the fixed stop 71 ', under the action of its elastic means 72' ,
Similarly, if the spout 96 'is in contact, not on the high level 95', but on the medium level 95 "of the selection cam 95, the first spout 77b of the authorization lever 69b is released by the stop 152, and it can fall into the notch 162 ′ when the latter reaches in front of it, before the deeper wolf tooth 170. It is the second nozzle 79b which, in this case, keeps in its authorization position the prohibition lever 50 ', to allow the end of the average delay period.

 Similarly, if the spout 96 'is in contact with the low level 95 "' of the selection cam 95, it is the first spout 77c of the authorization lever 69c, which is also released by the stop 153, and which may fall into the notch 163 'when the latter arrives in front of it before the other notch 162'.

It is then the second nozzle 79c which maintains in its authorization position the prohibition lever 50 ', to allow the end of the shortest time-out period.

 In all cases, as soon as the pawl 21 arrives in the front position (FIG. 1), the rear part 115b of the high level 1-15 ′ of the authorization cam 115 abruptly releases the third arm 53a of the prohibition lever 50 'which returns to its first position, prohibited, under the action of its elastic means 49.

 The second toothed crown 32 having rotated by a tooth, along 122, at the same time as the first 31, the location of the tooth removed from this crown 32 ngest more disposed vis-à-vis the second pawl 22 which is now free advancing the first part 1 of the cam block 5, one step every two minutes, at normal rate.

 The variant described above presents an additional advantage in the case where the cam block 5 has been actuated manually in rotation and has been stopped involuntarily in an intermediate angular position which does not correspond exactly to that obtained automatically by a complete oscillation of the ratchet. in advance 21. In this case, during its first following forward oscillation, the pawl 21, in its second operating phase during which it is released pressing against the flank of a tooth of the toothed crown 31, drives this tooth to complete the advance of a step that has started.

 Another advantage of this control device resides in the fact that, if the cam block 5 is actuated in rotation, manually, at an instant when a drive finger 73 is in the immediate vicinity of the wolf teeth 168, for example on the point-to drive one of them in rotation, this finger 73 does not oppose the instantaneous return to the starting position, of the counting mobile 167 since the latter is, at this instant, moved away from this finger under the effect tilting of the swing arm 65 'which supports it.

 Without departing from the scope of the variant described above, the activation cam 115 could be eliminated, the tilting of the prohibition lever 50 '' between its first position, prohibition, and its second position, d 'authorization, being obtained by bracing the stop 56 of the pawl 21 against the finger 51', as described in the first embodiment of the main patent.

Claims (3)

1. Programmer control device, comprising a pro cam block  rotatable grams which can be rotated step by step by  a step-by-step feed device comprising an oscillating support provided  to oscillate at each revolution of a feed cam, this support supporting  at least one advance pawl likely to cooperate, under the action of a  elastic means, with a toothed mobile kinematically linked to the cam block  programs, means being provided for, sometimes prohibiting, sometimes  toriser, the action of the pawl advances on the toothed mobile, these means  of prohibition and authorization comprising, on the one hand, a lever of  terdiction cooperating with means likely to tip the  said prohibition lever, each time the pawl goes back and forth,  between two angular positions, a first angular position in  which part of the prohibition lever is disposed on the tra  jectory of the advance pawl (21), respectively of the oscillating support,  to prevent the action of this pawl on the toothed mobile (31), a  in angular position in which said part of the inter lever  diction is not arranged on the path of the ratchet in advance, res  pectively of the oscillating support, so as to allow the action of this  ratchet on the toothed mobile, on the other hand, retaining means, action  instantly and / or timed, likely to re  hold the prohibition lever in its first respective position  lying in its second position, at a time when said lever occupies the  said position, a return spring constantly tending to bring said  lever in its other position, control device in which the  toothed mobile cooperating with the advance pawl is constituted by a  first toothed crown (31) integral with the cam block (1) on which  is mounted to rotate at least one ring (2) movable in rotation under  the action of another advance pawl (23) placed on the same support  oscillating than the first, characterized in that the retaining means,  actuable after any one of several tempo periods  predetermined risks, comprise an oscillating arm (65 ') comprising  an actuating spout (66 ') intended to be lifted by each tooth  a toothed crown (35) integral with the first part (1) of the block  cams (5), crown arranged next to the first crown (31), con  be the action of an elastic means (75 ′), said oscillating arm supporting  a counting mobile (167), pivoting, and, on the side of this mobile, opposite  at the actuation spout (66 '), authorization levers (69a, 69b, 69c)  mounted side by side pivoting on a common axis (70 '), identical  bre at predetermined time periods, the counting mobile (167) constantly tending to be angularly brought into abutment against a fixed stop (71 '), under the action of an elastic means (72'), and comprising, on its periphery, driving wolf teeth (168) arranged on the path of at least one driving finger (73) integral with the rotating ring (2), so that the counting mobile (167) advances a tooth at each passage of a finger (73), a first authorization lever (69a) comprising a first beak (77a), non-return, which cooperates successively, under the action of an elastic means ( 78 ') with each of the driving wolf teeth (168) of the counting mobile (167) or with other wolf teeth (169) concentric with the preceding ones, one of which (170) is deeper than the others , the other authorization levers (69b, 69c) being capable, under the action of elastic means, of cooperating respectively, either, by a first spout (77b, 77 c), with cams (162, 163) arranged one against the other, forming part of the counting mobile (167) and each comprising a notch (162 ', 163') of depth substantially equal to that of the tooth of deeper wolf (170), either, by the same first beak or by another beak, with stops (152, 153) offset one relative to the other in the direction of the toothed crown (31), the notches and the deeper tooth of the wolf being offset angularly with respect to each other, the stops being formed either by the profile of at least one selection cam (95) integral with the first part (1) of the block cams, either by parts of a timing selection lever (90 ') comprising a spout (96') cooperating, under the action of an elastic means, with said profile of the selection cam (95), this last comprising as many levels (95 ', 95 ", 95"') as there are predetermined time periods, each authorization lever (69a, 69b, 69c) comprising a second beak (respectively 79a, 79b, 79c), retaining, capable, when the first corresponding beak (77a, 77b, 77c) cooperates with the deeper wolf tooth (170), respectively with the notch (162 ', 163' ) of one of the cams (162, 163), of retaining a part (53a) of the prohibition lever (50 ') when the latter, against the action of its elastic means (49), occupies its second angular position , authorization, a fixed stop (81 ') being disposed on the path followed by the authorization levers (69a, 69b, 69c) during the pivoting of the swing arm (65') which supports them, under the effect of the rotation, of a tooth, of the toothed crown (35) intended to actuate said arm, in order, on the one hand, to release the retaining spout (79a, 79b, 79c) outside the trajectory of the prohibition lever (50 '), on the other hand release, from the counting mobile (167), the first spout (77a) of the first authorization lever  (69a) and / or any of the respective first beaks (77b, 77c) of the  other authorization levers (69b, 69c). 2. Programmer control device according to claim 1, ca  contracted in that the means capable of tilting the lever  of prohibition (50 '), between its first and its second angular position  re, against the action of its elastic means (49), at each back and forth of the  advance pawl (21), are constituted by a rotary cam (115) pre-  view to cooperate with a part (53a) of the prohibition lever (50 ')  so as to actuate the latter as soon as the advance pawl (21) has ef  carried out a sufficient advance to exceed its pos.  visible with the next tooth of the toothed crown (31). 3. Programmer control device according to any of the re  vendications 1 or 2, characterized in that the retaining means are  consisting of a part (180) of a mechanical control element (181),  instantly movable, the trajectory of which is such that said by  tie (180) is likely to cooperate with the prohibition lever  (50 '), or by cutting the path of this lever when it>  against the action of its elastic means (49) occupies its second position  angular, of authorization, either by pushing and maintaining said lever  (50 ') in this second angular position.