EP1883945B1 - Device for the remote activation of a manual activation means for a protective switch - Google Patents

Abstract

The device (1) has a drive mechanism (11) with an electric motor (13), first and second switches (15,17) for the motor and a gear mechanism (9) and clutch mechanism (12) for mechanically coupling the drive mechanism to the circuit breaker. A lever (7) and the gear mechanism can be positioned in two end positions. The lever can be moved from one to the other by the drive mechanism. The drive mechanism is actuated when the lever is moved manually from one end position to the other to transfer the gear mechanism from one end position to the other.

Description

The invention relates to a device for remote operation of a circuit breaker with two stable positions corresponding to a switch-on and a switch-off, comprising a drive mechanism with an electric motor, with a first and a second switch for switching on and off of the electric motor and a transmission and a clutch mechanism which is provided for the mechanical coupling of the drive mechanism to the switch and having a lever, wherein the transmission can be positioned in two basic positions and the lever in two end positions and wherein the lever with the aid of the drive mechanism is remotely operable from its one to the other end position.

Circuit breakers are used to switch off circuits in the event of overcurrent. A circuit breaker disconnects the circuit as soon as its rated current is exceeded by a certain factor. This protects the load or the line from being damaged or destroyed by the thermal effect of the current. Generally, there are thermal, thermal-magnetic, magnetic and hydraulic-magnetic circuit breakers and circuit breakers.

There are switches, as in the document " DE 37 11 138 A1 Such devices allow the operation of a switch remotely, acting on a switching mechanism of the circuit breaker, in particular via a manually operable hand actuator or gear knob A switch enables both the remote switching off and the remote switching on of a circuit breaker, whereby an auxiliary electrical energy is needed for the electric motor of the device.

Such a device is for example in the US 5,838,219 specified. There, a circuit breaker is described with a remote drive attached thereto, wherein the movements of the trained as a rocker hand-held actuator of the circuit breaker over a rocker switch of the remote operator can be controlled. The rocker switch of the remote operator can be actuated by means of a drive mechanism. For this purpose, an actuator moves between two positions. Manual actuation of the rocker switch of the circuit breaker or the remote actuator requires the actuator to be converted to allow for future remote operation.

Object of the present invention is to provide a device that allows safe and reliable remote operation of a manual actuator of a circuit breaker even with meanwhile manual operation of the hand-operated device.

The object is achieved by a device having the features of claim 1. Thereafter, the device has a drive mechanism which is designed such that when a manual transfer of the lever from one to the other end position of the switch is actuated, in such a way that the transmission is transferred from one to the other basic position.

A significant advantage of this embodiment is the fact that a synchronization of the manual and remote transfer of the hand-operated device is achieved, i. with manual operation of the manual actuator, the drive mechanism is retracted automatically. A simple and reliable operation of the device is made possible by defining two basic positions of the transmission, depending on the operation of one of the two switches. With the help of the thus formed drive mechanism, the transmission is automatically transferred from one to the other of the two basic positions, which are correlated with the two end positions of the lever and with the on and off position of the hand-operated, regardless of whether the hand-operated manually or remotely - or is switched off. Since one of the two switches is used for the automatic descendants, no additional switch or trigger mechanism is necessary, which allows a compact and simple structure.

Even after an electrical release of the circuit breaker is an automatic synchronization. The circuit breaker remains fully operational in the absence of operating voltage, the drive. A synchronization of the drive to the respective Switching state of the circuit breaker is done automatically after applying the operating voltage.

Preferably, the first switch is a make contact and the second switch connected in series therewith is an opener. As a normally open contact we designate a switch which is open in its normal, unactuated position (NO contact, normaly open). In contrast, a breaker is referred to as a switch which is closed in its normal position (NC contact, normaly closed). The electric motor is therefore stopped when both switches are operated simultaneously or both are not operated simultaneously. In the first home position of the transmission, preferably both switches are not actuated, i. the circuit for supplying the electric motor is open at the closer. A transfer of the manual actuator closes the first switch and the transmission runs until the second switch is actuated and thereby opened. This corresponds to the second basic position of the gearbox. Regardless of whether a remote-controlled or manual transfer of the hand-operated device takes place, in both cases the transmission is moved from one to the other basic position by means of a combined closing or opening of the two switches. Thanks to this circuitry simple construction and interaction of the components a reliable operation of the device is granted.

Preferably, the lever has an axis of rotation about which it is rotatable when switching from one to the other end position along a circular arc. The rotational movement of the lever is correlated with the rotational movement of the manual actuator, in particular, it corresponds to the rotational movement of the hand actuator. With an illustration of the rotational movement of the hand actuator by the rotational movement of the lever a simple mechanical connection between the circuit breaker and the device is made possible. In this case, only a correlation of the end positions of the lever with the basic positions of the transmission is necessary, which is achieved by simple mechanical means.

Further preferably, the drive mechanism on a control disk, wherein the two basic positions of the transmission are defined by this control disk and are offset by about half a revolution of the control disk. This means that starting from one of the basic positions of the transmission and one of the end positions of the Levers that are related to each other, after half a revolution of the control disc, the other basic position of the transmission is achieved simultaneously with the other end position of the lever and the electrical supply of the electric motor is switched on or off.

According to a preferred embodiment of the device, the control disk is rotatable in one direction only. The drive mechanism therefore needs to be designed only for one direction of rotation and a reversal of polarity of the electric motor to change the direction of rotation is not required.

Advantageously, the control disk actuates the first switch via a direct contact. The switch is in particular positioned so that it touches the peripheral side of the control disk and the contact is actuated by the switch. To turn off the switch is expediently introduced at least one point along the peripheral side of the control disk a recess.

It is also advantageous if the lever is connected to the control disk via a coupling element which is rotatably mounted on the control disk at a pivot point, wherein the articulation point is spaced from a rotational axis of the control disk (29). Thus, the articulation point shifts along a circular path during rotation of the control disk and with him also one side of the coupling element. The rotatable connection between the coupling element and the control disk ensures high flexibility of the movements of the coupling element along the entire circular path.

Preferably, the coupling element has a slot-shaped elongated hole in which a pin of the lever runs. The slot also provides a high flexibility of the connection between the coupling element and the lever. The pin of the lever can thus move freely along the elongated hole during the circular movement of the coupling element.

Furthermore, the coupling element preferably has a projection which is provided for mechanical contact with the second switch. The approach is designed the contact with the switch is made only at a point or area of the track which describes the coupling element as it moves. Due to the series connection of the two switches, which are designed as NC and NO, the energy supply of the electric motor is interrupted by this measure in a predetermined gear position. The contact between the hub and the second switch is therefore intended to interrupt the circuit as soon as the control disc is in one of the basic positions.

Preferably, the first switch via a direct mechanical contact from the coupling element or from the control disk can be actuated. In a remote-controlled operation of the manual actuator of the circuit breaker, the electric motor is started with a short current pulse, the control disk rotates and actuates with its peripheral side of the first switch, so that the circuit is closed. In a manual change of the end position of the lever, in contrast, the first switch is actuated via a mechanical contact with the coupling element. The change in position of the lever thus also automatically moves the coupling element, so that the first switch is actuated, the electric motor is started and the transmission is automatically brought into its other basic position.

In an advantageous embodiment of the device, the lever has a driver, in particular in the form of an opening, which is provided for the positive reception of a coupling member which connects the device with the hand actuator. By this coupling element, the correlation of the lever is done with the hand actuator, in which the rotational movement of the lever is transmitted to the hand actuator. If the circuit breaker and the device for remote operation of this circuit breaker are arranged side by side, the coupling element may be in the form of a pin. This pin directs the torque of the hand actuator to the lever and vice versa.

In a preferred embodiment, the electric motor is switched on and off by means of a button. The button triggers the current pulse to the electric motor, the electric motor actuates the gearbox and brings it to its other basic position where the circuit is interrupted. At the same time the lever is brought into its other end position and its rotary motion is transmitted to the hand-operated.

Advantageously, the device has separate ON and OFF buttons or a changeover switch, upon actuation of which the transmission can be transferred from its first to the second basic position and vice versa.

In another advantageous embodiment of the device, only one OFF button is provided, upon actuation of the transmission is moved to a basic position, which is correlated to the OFF position of the manual actuator.

Fig. 1

eine Aufsicht auf eine Vorrichtung zur Fernbetätigung eines Handbetäti- gers eines Schutzschalters in der AUS-Endstellung des Hebels,

Fig. 2

eine Aufsicht auf die Vorrichtung gemäß Fig. 1 in der EIN-Endstellung des Hebels,

Fig. 3

eine Aufsicht auf die Vorrichtung gemäß Fig. 1 nach manueller Überführung des Hebels von der AUS- in die EIN-Endstellung,

Fig. 4

eine Aufsicht auf die Vorrichtung gemäß Fig. 1 nach manueller Überführung des Hebels von der EIN- in die AUS-Endstellung,

Fig. 5

eine Explosionsdarstellung der Bauelemente der Vorrichtung gemäß Fig. 1,

Fig. 6

einen Schutzschalter und eine Vorrichtung zur Fernbetätigung des Hand- betätigers des Schutzschalters in perspektivischer Darstellung,

Fig. 7

den in Fig. 6 gezeigten Schutzschalter mit der Vorrichtung im montierten Zustand,

Fig. 8

ein erstes Schaltbild der Vorrichtung mit einem Taster zum Ein- und Aus- schalten des Elektromotors,

Fig. 9

ein zweites Schaltbild der Vorrichtung mit zwei getrennten EIN- und AUS- Tastern,

Fig. 10

ein drittes Schaltbild der Vorrichtung mit einem Wechselschalter,

Fig. 11

ein viertes Schaltbild der Vorrichtung mit einem NOT-AUS-Taster, und

Fig. 12

ein Schaltbild als Ergänzung zu den in Fig. 8 bis 11 gezeigten Schaltbil- dern, bei dem zusätzlich eine Schaltzustandsanzeige vorgesehen ist.

Embodiments of the invention are explained below with reference to the figures. It shows schematically and partially simplified:

Fig. 1

a plan view of a device for remote operation of a manual actuator of a circuit breaker in the OFF end position of the lever,

Fig. 2

a plan view of the device according to Fig. 1 in the ON end position of the lever,

Fig. 3

a plan view of the device according to Fig. 1 after manually transferring the lever from the OFF to the ON end position,

Fig. 4

a plan view of the device according to Fig. 1 after manually transferring the lever from the ON to the OFF end position,

Fig. 5

an exploded view of the components of the device according to Fig. 1 .

Fig. 6

a circuit breaker and a device for remote operation of the manual actuator of the circuit breaker in a perspective view,

Fig. 7

the in Fig. 6 shown circuit breaker with the device in the assembled state,

Fig. 8

a first circuit diagram of the device with a button for switching on and off of the electric motor,

Fig. 9

a second circuit diagram of the device with two separate ON and OFF buttons,

Fig. 10

a third circuit diagram of the device with a changeover switch,

Fig. 11

a fourth circuit diagram of the device with an emergency stop button, and

Fig. 12

a schematic diagram as a supplement to the in 8 to 11 Schaltbil- shown, in which additionally a switching state indicator is provided.

Equivalent parts are provided in the figures with the same reference numerals.

According to the Figures 1-5 has a device for remote operation 1 of a manual actuator 3 of a circuit breaker 5 (for manual operation 3 and 5 protection switch see, in particular Fig. 6 and 7 ) has a drive mechanism 11 and a clutch mechanism 12. In the exemplary embodiment, the drive mechanism 11, an electric motor 13, a first switch 15 and a second switch 17 and a transmission 9. This comprises a worm 19, three step gears 21, 23 and 25, a driven gear 27 and a control disk 29 with a recess 30. The coupling mechanism 12 has a lever 7 and a coupling element 31. The components of the device 1 are in a housing 33 and a cover 35 (see Fig. 5 ) stored. The driven gear 27 and the control disk 29 are fixedly connected to each other and may also be formed as one part. The coupling element 31 is rotatably connected to the control disk 29 at its one end in an articulation point 37, which is formed as an axis. In the region of the slot 39, the coupling element 31 is bent in the manner of an L formed, but alternatively, other forms of the slot are possible. Between the articulation point 37 and the slot 39, the coupling element 31 has a projection 41. The lever 7 is rotatably mounted in the housing 33 on an axis 45 perpendicular to the drawing surface and has an opening 47 which is adapted to receive a coupling member 49 (see. Fig. 6 ), which connects the device 1 to the hand actuator 3.

The first switch 15 of the two series-connected switches 15, 17 is a NO contact (NO contact) and the second switch 17 is an NC contact (NC contact). The second switch 17 is closed in its normal position, but the first switch 15 is not. The circuit is open. By actuating the first switch 15, the circuit is closed. In a subsequent actuation of the second Switch 17, it is opened again and the electrical supply to the electric motor 13 is interrupted. Therefore, the electric motor 13 runs only when the first switch 15 is actuated and the second switch 17 is not. Conversely, when only the second switch 17 is operated, it is open and the circuit is also open.

The function of the device 1 is based on the Fig. 1 to 4 explained in more detail. At the in Fig. 1 shown situation, the lever 7 is in its OFF end position. At the same time, the control disk 29 is in its OFF basic position. The two OFF positions correlate to the switch-off position of the hand-operated switch 3 designed as a rocker switch fig1 initially both switches 15 and 17 are not actuated. The first switch 15 is actuated by the control disk or by the edge of the coupling element 31, depending on the position of the lever 7. The second switch 17 is actuated only by the projection 41.

In a remote operation of the device, the control disk 29 is in the in Fig. 2 shown one-basic position brought. At the same time the lever 7 is brought into its one-end position. The two on-positions correlate to the closed position of the manual actuator 3.

To transfer the control disk 29 of the in Fig. 1 in the in Fig. 2 shown basic position of the electric motor 13 gets remote-controlled, for example by means of a button T (see. Fig. 8 ) a current pulse and starts to run. About the gear 9, the control disk 29 is rotated. The button T must be pressed until the first switch 15 is actuated by the control disk and the switch 15 is closed. The switch 15 with NO contact is switched so that it takes over the further electrical supply of the electric motor 13 together with the series-connected NC contact of the switch 17. The coupling element 31 engages with the right side of the slot 39 on the pin 43 of the lever 7 and rotates the lever 7 via the lever arm in a clockwise direction in the closed position of the manual actuator 3 of the circuit breaker 5. The electric motor 13 and the transmission 9 run automatically until the approach 41 on the coupling element 31, the second switch 17 is actuated. The electrical supply of the electric motor 13 is interrupted by the actuation of the second switch 17.

Fig. 2 shows the OFF end position of the lever 7 and the corresponding basic position of the transmission 9. The control disk 29 has made a 180 ° revolution when switching from the ON end position to the OFF end position. Each of the two switches 15, 17 has an actuator 15a, 17a for actuating the switches 15, 17. The recess 30, in which in the basic position of the transmission 9, the actuator 15 has a located (see Fig. 1 ), is now on the opposite side. The pin 43 of the lever 7 is located approximately on the left side of the slot 39 of the coupling element 31st

By a renewed actuation of the button T, the electric motor 13 receives a current pulse again and sets the gear 9 in motion. The button T must be pressed until the projection 41 on the coupling element 31 releases the actuator 17a on the second switch 17 and the electrical supply of the electric motor 13 is taken over by the NC contact of the second switch 17 together with the first switch 15 connected in series , By the rotational movement of the control disk 29, the coupling element 31 pulls over the slot 39, the pin 43 and thus the lever 7 in the OFF end position (see Fig. 1 ). The control disk 29 comes to a standstill when the actuator 15a of the first switch 15 falls into the recess 30, and thus the electrical supply of the electric motor 13 interrupts. The pin 43 of the lever 7 then abuts approximately on the right side of the slot 39 (see Fig. 1 ).

Fig. 3 shows the situation after the lever 7 has been manually brought from the OFF to the ON end position. First, the control disk 29 is still in the OFF-home position. Lever 7 and control disk 29 are therefore no longer correlated with each other. The device 1 is designed such that after the manual operation, the control disk 29 is automatically synchronized with the manual position of the manual actuator. To achieve this, the manual transfer of the lever 7 in the ON end position, the coupling element 31 is lifted slightly so that its edge actuates the first switch 15 by means of the actuator 15a. The transmission 9 is set in motion via the two series-connected switches 15 and 17. The first switch 15 is now actuated via the control disk 29. The slot 39 of the coupling element 31 is shaped so that it is the lever in the ON position leaves. The control disk 29 and the coupling element 31 move until the projection 41 on the coupling element 31, the second switch 17 is actuated and the position according to Fig. 2 is reached.

Therefore, when the circuit breaker 5 is manually turned on by means of the hand actuator 3, the drive mechanism 11 automatically tracks to its associated home position. The actuator 15a, actuated first by the edge of the coupling element 31 and then by the control disk 29, closes the circuit.

In Fig. 4 is the opposite situation too Fig. 3 shown, namely the situation after the lever 7 has been manually transferred from the ON to the OFF end position.

When the circuit breaker 5 is turned off by hand by means of the hand actuator 3, the drive mechanism 11 runs automatically again. The lever 7 is located as in Fig. 1 shown in the OFF end position. The actuator 17a of the switch 17 is released by the projection 41 of the coupling element 31. The electric motor 13 is supplied via the two series-connected switches 15 and 17 with power and sets the gear 9 in motion. The control disk 29 and the coupling element 31 connected to the control disk 29 move until the actuator 15a of the first switch 15 falls into the recess 30 and the switch 15 switches off the drive mechanism 11. It is thus the basic position according to Fig. 1 reached.

An exploded view of the individual components of the device 1 is shown in FIG Fig. 5 represents. It shows the lever 7 with the pin 43 and the opening 47, the electric motor 13, the two switches 15 and 17 with the respective actuator 15a and 17a, the worm 19, the three step wheels 21, 23 and 25, the driven gear 27, the Control disk 29 with the recess 30 and the axis, which is the articulation point 37, the coupling element 31 with the slot 39 and the projection 41. Furthermore, a bearing pin of the control disk 50 is shown. The components of the device 1 are mounted in the housing 33 and a cover 35. The two switches 15 and 17 are arranged in this embodiment on a guide plate 51. In addition, electronic components, such as overload protection for the electric motor, can be mounted on the guide plate. Blocks for a bus connection and various connector modules for the electrical supply of the drive mechanism 11 are attached.

The circuit breaker 5 with the form of a switching rocker hand actuator 3 and the device 1 for remote control of this hand-operated device 3 are in Fig. 6 and Fig. 7 shown. The hand actuator 3, which is designed as a shift knob, and the device 1 are connected to each other by means of the coupling member 49, which has the shape of a pin. The device 1 is approximately the size of the circuit breaker 5 and is designed in the manner of an adapter which can be attached to the circuit breaker 5, as in Fig. 7 shown. The circuit breaker 5 has an optical viewing window 48 for a mechanical indication of the switching state. The device 1 can be connected simultaneously by means of the coupling member 49 with a plurality of circuit breakers 5. The circuit breaker 5 is provided in particular for securing individual line strands or channels against overcurrent in a power distribution system, for example, for an operational communication network.

In 8 to 11 in each case a circuit diagram is shown, each with different buttons or switches for switching on and off of the electric motor for the remote control. In all the figures, the two switches 15 and 17, the electrical supply (denoted by + and -), a diode D, a resistor R and the electric motor 13 with an associated electric motor protection 53 are shown. The diode D is a reverse polarity protection and allows only one direction of rotation of the drive mechanism 13. The circuit has, depending on the operation of one of the two switches 15 and 17, two possible current paths for supplying the electric motor 13. The first switch 15 is a normally open in the normal position. The second switch 17 is an opener, which is closed in the normal position.

In the embodiment of the device 1 according to Fig. 8 is merely a button T for turning on the electric motor 13 in a remote controlled operation of the device 1 is provided. Upon actuation of this button T, the circuit is closed regardless of the state of the two switches 15 and 17 and the electric motor is supplied with power. Each time the button T is pressed, the control disk 29 is therefore moved from one to the other basic position. The button T must be pressed for so long until the switch 15 from the control disk 29 (see. Fig. 1 ) is actuated or until the projection 41 releases the switch 17 (see. Fig. 2 ). The functional sequence corresponds to the pulsed operation with a button T, which is used in the description of the FIGS. 1 and 2 was explained in more detail.

In Fig. 9 are to turn on and off the electric motor 13 two separate buttons, namely an ON button T _E and an off button T _A provided. The ON button T _E must be pressed until switch 15 is actuated by the control disk 29. The OFF button T _A must be pressed until the projection 41 on the coupling element 31 releases the actuator 17 a of the switch 17 (see. Fig. 2 ).

The embodiment in Fig. 10 has a changeover switch W for turning on and off the electric motor 13. Depending on the positioning of the changeover switch W, the circuit is closed via the first switch 15 or via the second switch 17. The changeover switch W is according to the embodiment in Fig. 10 in position "on" and the circuit is closed via the second switch 17. The control disk 29 moves from the OFF home position ( Fig. 1 ) into the ON basic position ( Fig. 2 ). As a result, first switch 15 is closed. Upon reaching the ON basic position ( Fig. 2 ), the switch 17 is opened. When moving the changeover switch W, the control disk 29 is moved back to the OFF-home position. First, the electric motor 13 is started via the closed switch 15. Right at the beginning of the switch 17 is opened. The current path remains closed above the switch 15 until the control disk 29 reaches the OFF home position and opens the switch 15, so that the power supply is interrupted. The changeover switch W is provided for a configuration in which the circuit breaker 5 has no hand actuator 3 and thus can not be manually operated.

According to the embodiment in Fig. 11 Only one EMERGENCY STOP switch is used. The device 1 can be remotely operated only by means of this switch. The circuit breaker 3 and the device 1 can be turned on only by means of the manual actuator 3 of the circuit breaker 5.

For all connection variants the in 8 to 11 shown is a switching state indicator by means of LED or lamp L possible. This is in Fig. 12 shown. The signaling can be done on the device 1, for example by LEDs, which are arranged on the circuit board 51 and guided through openings on the housing 33 to the outside. Alternatively, the signaling, for example, on a control panel spatially separated from the device 1 and the switch 5 done. The two lamps L shown are designed such that in each case exactly one lamp L lights depending on the switching positions of the switch. The resistor R serves to adapt or stabilize the supply voltage for the lamps L. Instead of the resistor R, a Zener diode or the like can be used.

LIST OF REFERENCE NUMBERS

1

contraption

3

manual actuator

5

breaker

7

lever

9

transmission

11

drive mechanism

12

coupling mechanism

13

electric motor

15

first switch

15a

Actuator of the first switch

17

second switch

17a

Actuator of the second switch

19

slug

21, 23, 25

Steps gears

27

output gear

29

control disc

30

recess

31

coupling element

33

casing

35

cover

37

articulation point

39

Long hole

41

approach

43

Pin of the lever

45

Axis of the lever

47

breakthrough

48

window

49

coupling member

50

Journal of the control disc

51

circuit board

53

Electric motor protection

D

diode

L

lamp

R

resistance

T

button

T _A

OFF button

T _E

ON button

W

changeover switch

Claims (14)

1. Apparatus (1) for remotely actuating a circuit breaker (5) with two stable positions corresponding to a switch-on position and a switch-off position, having a drive mechanism (11) with an electric motor (13), with a first and with a second switch (15, 17) for switching the electric motor (13) on and off and with a transmission (9) and a coupling mechanism (12), which is provided for mechanically coupling the drive mechanism (11) to the circuit breaker (5) and has a lever (7) for this purpose, the transmission (9) being capable of being positioned in two basic positions, and the lever (7) being capable of being positioned in two end positions, and the lever (7) being capable of being moved from its one end position into the other end position with the aid of the drive mechanism (11), characterized in that the drive mechanism (11) is designed such that, in the event of the lever (7) being moved over manually from one end position into the other end position, one of the switches (15, 17) is actuated, with the result that the transmission (9) is moved over from one basic position into the other basic position.
2. Apparatus (1) according to Claim 1, characterized in that the two switches are arranged in series, and in that the first switch (15) is a normally open contact, and the second switch (17) is a normally closed contact.
3. Apparatus (1) according to Claim 1 or 2, characterized in that the lever (7) has an axis of rotation (45), about which it can be rotated when switching over from one end position to the other end position along an arc of a circle.
4. Apparatus (1) according to one of the preceding claims, characterized in that the drive mechanism (11) has a cam disk (29), the two basic positions of the transmission (9) being defined via this cam disk (29).
5. Apparatus (1) according to Claim 4, characterized in that the cam disk (29) is capable of rotation only in one direction.
6. Apparatus according to Claim 4 or 5, characterized in that the cam disk (29) actuates the first switch (15) via a direct contact.
7. Apparatus (1) according to Claim 4, 5 or 6, characterized in that the lever (7) is connected to the cam disk (29) via a coupling element (31), which is arranged on the cam disk (29) such that it can rotate at an articulation point (37), the articulation point (37) being spaced apart from an axis of rotation of the cam disk (29).
8. Apparatus (1) according to Claim 7, characterized in that the coupling element (31) has a slot (39) in the form of a slotted link, in which slot a pin (43) of the lever (7) runs.
9. Apparatus (1) according to Claim 7 or 8, characterized in that the coupling element (31) has an attachment (41), which is provided for the mechanical contact with the second switch (17).
10. Apparatus according to Claim 7, 8 or 9, characterized in that the first switch (15) is capable of being actuated by the coupling element (31) or by the cam disk (29) via a direct mechanical contact.
11. Apparatus (1) according to one of the preceding claims, characterized in that the lever (7) has a driver (47), which is provided for accommodating a coupling member (49), which, in the fitted state, is connected to the manual actuator (3).
12. Apparatus (1) according to one of the preceding claims, characterized in that the electric motor (13) is capable of being switched on and off by means of a pushbutton (T).
13. Apparatus (1) according to one of the preceding claims, characterized in that it has separate ON and OFF pushbuttons (T_E,T_A) or a changeover switch (W), on whose actuation the transmission (9) is capable of being moved over from its first basic position into the second basic position, and vice versa.
14. Apparatus (1) according to one of Claims 1 to 13, characterized in that only one OFF pushbutton (T_A) is provided, on whose actuation the transmission (9) is moved into its one basic position, which is correlated with the switch-off position of the manual actuator (3).

Images