FR2607319A1 - TELENER WITH AN AUXILIARY INVERTER ON ITS CONTROL CIRCUIT - Google Patents

Abstract

Remote-control interrupter of the type comprising an auxiliary change-over switch interposed between the coil of the said interrupter and two parallel control conductors. The prop (5a) for the moving contact of this auxiliary change-over switch is mounted pivotably on the moving prop (3a) for the main contacts of this interrupter. Elastic thrusting means tend to ensure stability of the prop (5a) for the moving contact of the switch in each of its positions. However the arrangement is such that the kinematics of this prop (5a) includes two separate axes of tilt (C-D and E-F) which lie on either side of the axis of tilt (A-B) of the mechanism of the interrupter. Thus, the tilting of this prop (5a) into a new position can thus take place only after tilting of the mechanism of the interrupter. This interrupter can be employed for any of the usual uses of interrupters of this type.

Description

"Toggle switch comprising an auxiliary inverter on its circuit

  "Contrary to the contactors, the remote switches have two stable positions.

  controlled by impulses that feed their electro-

  magnet; which, through a suitable mechanism, reverses the position of the contacts to be controlled. Thanks to the pulse command, the remote switches have, with respect to the contactors, the advantage of not requiring the maintenance of a current

in the winding.

  On the other hand, in the case of a remote control, one is not always able to know the position

  contacts, unless you use a control light.

  Another disadvantage of the remote switches, appears when they are coupled in parallel, that is to say

  when a pusher is connected to several remote switches.

  In this case, it happens, when the control pulses are too brave, that some remote switches do not switch, while the others switch normally, the response times may be slightly different. In this case, the contacts of remote switches are no longer in concordance, it can result in serious disorders and in any case, the need to involve a

professional for troubleshooting.

  In order to overcome these drawbacks, it has been imagined to provide the remote switches with an auxiliary inverter inserted on its control circuit so as to provide this control by one or the other of two separate conductors respectively comprising a push-button for

  and a stop button, this inverter being itself

  even actuated by the mechanism of the remote switch during operation thereof. Thus, such a remote control interrupts itself the impulse which causes its

  tilting, in one direction or the other.

  In such a remote control, the pulse sent in one of the control leads, from the start pushbutton, causes the closing of the main contacts, while the pulse sent to the other conductor, from the push "stop", causes the opening of these same contacts. It is the kinetic energy of all moving parts that allows the passage of the dead center of the remote control mechanism

  and the completion of the running of moving parts.

  However it may happen that a control pulse, very brief, does not provide the energy necessary to cross the dead point. If, in such a case, some remote switches were to shift,

  the next impulse, of correct duration, would reset them.

  Indeed, only the remote switches have not been reversed

  would receive the command pulse.

  However, during too brief pulses, it may happen that the auxiliary inverter, controlling the coil of the remote control switch, stops in its neutral position. This happens when the duration of the pulse exactly matches the energy needed

  to bring the mechanism of the remote control switch to its neutral position.

  In such a case the two contacts of the inverter are then cut simultaneously. As a result, the remote control switch is immobilized in this position and

  is unable to maneuver it electrically.

  The care that is taken in the manufacture of such a device can reduce this risk, but can not completely eliminate it; indeed, the springs which ensure the tilting and the stability of the two extreme positions become inoperative to the passage of the dead point, because they cause on the contrary friction which is at their maximum and which favor immobilization in this position. This is why the present invention aims to provide a remote switch of the type in question, that is to say a remote switch with an auxiliary inverter, whose design is such that the mechanism thereof can not no way to be immobilized in the position

  opening of the two contacts of this inverter.

  For this purpose the remote switch according to the invention is characterized in that: the support of the movable contact of its auxiliary inverter is pivotally mounted on the movable support of the main contacts of this remote switch between two distinct closure positions determined by the displacement of this support movable in one direction or the other, - elastic thrust means tend to ensure the stability of the support of the moving contact of the inverter in each of these positions, - but the arrangement is such that the kinematics of this support comprises two distinct axes of tilt, which are located on either side of the axis of tilting of the mechanism of the remote control, - and that the tilting of this support in a new closed position can take place

  after tilting of the remote control mechanism.

  Under these conditions, there can therefore be in no way immobilization of the support of the movable contact of the auxiliary inverter in an open position thereof. In an advantageous embodiment of this remote control, the support of the moving contact of its auxiliary inverter is constituted by an arm pivotally mounted on the movable support of the main contacts and forming a toggle system with a member carrying a thrust spring and of which the opposite end is articulated itself on the movable support of the main contacts, while the fixed contacts of the inverter are arranged on either side of the axis of

  tilting of the remote control mechanism.

  The mechanism thus formed has a very high reliability of operation. Moreover, its installation inside the corresponding remote control switch

is very easy to achieve.

  However other features and advantages of the remote switch according to the invention will appear during the

  following description. This is given with reference to

  appended drawing for illustrative purposes only, and in which: FIG. 1 represents the connection diagram

  a remote control with an auxiliary switch.

  FIG. 2 represents the parallel connection of several remote switches of this type on two control conductors, respectively corresponding to the function

"walk" and "stop".

  FIG. 3 is a diagrammatic plan view from above of the installation of the auxiliary inverter of a remote switch according to the invention in the mobile support of FIGS.

main contacts of it.

  Figure 4 is a similar view illustrating the

  operation of this auxiliary inverter.

  FIG. 5 is a perspective view of the main organs of this inverter, these being represented before being mounted inside the support of the contacts

of the remote control switch.

  FIG. 6 is a perspective view of these same members after assembly and mounting inside a housing provided in the mobile support of the contacts

  of the corresponding remote control switch.

  Figure 7 is a side elevational view of a

  exemplary embodiment of a remote switch according to the invention.

  Figure 8 is a similar partial view of the

  opposite side of this same remote control.

  As indicated above, FIG. 1 illustrates the mode of connection of an auxiliary inverter switch. This remote switch, which is designated by the general reference 1, comprises a coil 2 actuating the movable support 3 of the main contact (s) to be controlled. The auxiliary inverter of this remote switch is inserted into the supply circuit 4 of the coil 2 and the support 5 of its movable contact is itself actuated by this coil. On the two fixed contacts 6 and 7 of this auxiliary inverter are connected two control conductors 8 and 9 each having a pusher 10 or 11, one of which corresponds to the function "start-up" and

the other to the "stop" function.

  As already indicated, the pulse sent into the conductor 8, from the start pusher 10, causes the closing of the main contact (s) 3 of the remote control as well as the reversal of the movable contact 5 of the auxiliary inverter, which comes

  stand against the second fixed contact 7 of it.

  Under these conditions, the subsequent actuation of the pusher 11 will be able to supply the coil 2 of the remote control to cause the opening of the main contact (s) 3, as well as a new inversion of the

  mobile contact 5 of the auxiliary inverter.

  As shown in Figure 2, it is possible to connect in parallel the control of several remote switches 1 of this type. This makes it possible to control the operation of all of these from two common push-buttons 10 and 11. However, one or the other of the remote control switches, or each of them, can also be controlled by a local push-button. connected directly to

  the coil of the corresponding remote control switch.

  Figures 3 and 4 are schematic views illustrating the operating principle of the inverter

  auxiliary provided in the remote switch according to the invention.

  In these figures, the members corresponding to those shown in the diagrams of FIGS. 1 and 2 are indicated by the same reference numerals assigned the index "a". In the example shown, the mobile support of the main contacts of the corresponding remote switch is constituted by a slider 3a moving along an axis Z-Z '. The two fixed contacts 6a and 7a of the auxiliary inverter are then arranged opposite this slider 3a on a line MN parallel to the axis of displacement of

  this one, and on both sides of the tilting axis A-

  B of the main contacts of the remote control switch. As described later, it is also the positions thus provided for these two fixed contacts which determine the two axes of tilting of the auxiliary inverter. As for the support of the moving contact of this inverter, it consists of an arm pivotally mounted at an intermediate point O of its

length, on the slider 3a.

  As shown in FIGS. 5 and 6, this pivoting arm may consist of a metal pallet whose one end carries a double contact 13

  constituting the moving contact of the auxiliary inverter.

  The opposite end 14 of this pallet is engaged to

  the inside of a cage 15 of molded insulating material.

  This cage comprises two notches 16 V-shaped inside which are engaged two shoulders 17 provided on the edges of the pallet 5a. Thus, the bottom of the notches 16 of the cage 15 materializes the axis 0 of pivoting of this pallet, which can be struggling to

  inside an opening 18 of the cage 15.

  The end 14 of the pallet 5a ends with a tip 14a which is engaged inside one of the flared ends 19 of a tubular piece 20 shaped hollow rivet. This part serves to support a pressure spring 21 which bears in the bottom of a seat 22 provided in the cage 15. The opposite end of this spring presses on the end 14 of the pallet 5a so as to ensure the stability of the latter in one and the other of its two extreme positions of closure of the corresponding contacts. The assembly thus formed is placed inside a housing 23 provided in the slider 3a of the remote control switch. It should be noted that this housing 23 can indifferently receive the cage 15 or a conventional contact set in the case where one would like to realize an ordinary remote switch. The electrical connection of the movable contact 13 with the coil of this remote control is provided by a metal braid 24 which is welded to the guide

tubular 20 carrying the spring 21.

  Thanks to the arrangement provided, the pallet 5a articulates inside the corresponding end of the tubular guide 20 serving as a support element for the spring 21. As for the opposite end of this spring, it can articulate itself in some way in the bottom of its seat 22 by elastic bending of the turns of this spring. The assembly thus produced constitutes a knee-type elastic mechanism whose unstable position of neutral is determined by the alignment of the pallet 5a on the transverse line XY passing through the axis O and the central point of support of the spring 21. In this position it is compressed to the maximum. When the slider 3a of the remote control switch is in one of its extreme positions, for example that represented in FIG. 3, the pallet 5a is kept stable in a position of angulation with respect to the element 20 carrying the spring 21. So the contact

  mobile 13 is then held against the contact 6a.

  However, when the slider 3a is in its opposite extreme position, the crease of the toggle mechanism constituted by the pallet 5a and the element 20 is itself reversed so that the moving contact 13

  is then kept stable against the fixed contact 7a.

  However, thanks to the arrangement provided, the mechanism of the auxiliary inverter has two distinct tilt axes, respectively CD and EF, which are arranged on either side of the tilting axis AB of the remote control mechanism and are sufficiently spaced apart. one of the other. Each of these tilting axes is determined by the alignment of the X-Y transverse line already defined, with the axis of the movable contact 13 in its position of support on one or the other of the fixed contacts 6a and 7a. However, it is the existence of these two tilt axes and their respective positions that prevent the auxiliary inverter can remain in an open position during operation of the

contactor.

  Indeed, when from the position shown in Figure 3 the slider 3a is moved in the direction of the arrow F1 and the transverse line XY of the inverter coincides with the tilting axis AB of the mechanism of the remote switch (position shown in Figure 4), this is not sufficient to cause the tilting of the pallet 5a. For this tilting it is necessary for the slider 3a to continue its movement until the transverse line X-Y of the inverter is moved beyond the tilting axis C-D whose position is defined by

  the point of support on the frayed contact 6a.

  It is therefore only well after crossing the axis A-B of the remote control mechanism that the tilting of the auxiliary inverter can take place. In those circumstances, if for one of the reasons set out in

  preamble of this description, there is a

  immobilization of the mechanism of the remote switch in its neutral position, the auxiliary inverter is not likely to be itself in the open position, since its pallet 5a has not yet been actuated. Consequently, it is thus ensured that this inverter can then transmit to the coil of the remote control switch,

  the next impulse that will complete the switchover of that-

this.

  Of course, the same phenomenon occurs when moving the slider 3a in the opposite direction. Indeed, the changeover of the inverter can take place only after the transverse line X-Y of the inverter has largely exceeded the tilting axis A-B of the remote control mechanism and has reached the second axis of tilting E-F

of the auxiliary inverter.

  Figures 7 and 8 show an example of practical embodiment of a remote switch equipped with an auxiliary inverter according to the invention. This remote switch, which is of the type described in French Patent No. 2,309,032 of the applicant company, comprises a flat-shaped housing enclosing both the magnetic control system thereof and the associated mechanism. I1 is therefore provided a coil 26 actuating a movable armature 27. It carries a thrust rod 28 whose opposite end actuates a rocker 29. The latter constitutes the control member of the slider 3a

  carrying the main contacts of the remote control switch.

  As shown in FIG. 7, these contacts 29 are mounted, in their middle, inside a housing provided on one of the faces of the lower part of the slider 3a. As for the auxiliary inverter previously described, it is carried by the opposite face of the lower portion of the slider 3a, which face is shown in Figure 8. It is therefore on this face that the slider 3a comprises a housing 23 to the inside which is placed the cage 15 containing the constituent organs

of the auxiliary inverter.

  As for the fixed contacts 6a and 7a of this inverter, they are provided opposite the corresponding portion of the slider 3a, as already described above. Thus the mounting of this auxiliary inverter in the present remote control switch is extremely easy to achieve and the presence of this inverter raises no particular difficulty for the manufacture and assembly

of this remote control switch.

  However it goes without saying that the remote control shown in Figures 7 and 8 is only one embodiment. Indeed, for its part corresponding to the function of remote switch, the design of the device and its arrangement could be different, the inverter mechanism described above can be

  suitable for different types of remote switches.

he

Claims (3)

  1 - Toggle switch of the type comprising an auxiliary inverter controlled by itself and interposed between the coil of said remote control and two parallel control conductors respectively containing a start and stop push button, characterized in that: - the support (5a) of the movable contact of this auxiliary inverter is pivotally mounted on the movable support (3a) of the main contacts of this remote switch between two distinct closure positions determined by the displacement of this movable support (30) in one direction or in the other, elastic thrust means tend to ensure the stability of the support (5a) of the moving contact of the inverter in each of these positions, but the arrangement is such that the kinematics of this support (5a) has two distinct axes of tilt (CD and EF), which are located on either side of the tilting axis (AB) of the remote control mechanism, and that the tilting of this support (5a) in a new she position can thus take place   after tilting of the remote control mechanism.   2 - Toggle switch according to claim 1, characterized in that the support of the movable contact (13) of its auxiliary inverter is constituted by an arm (5a) pivotally mounted on the movable support (3a) of the main contacts and forming a toggle system with an element (20) carrying a thrust spring (21) and the opposite end of which is itself connected to the movable support (3a) of the main contacts, whereas the fixed contacts (6a, 7a) of the inverters are arranged on both sides of the tilting axis (AB) of the remote control mechanism, so as to determine, for the auxiliary inverter, two distinct axes of tilting (CD   and E-F) located on either side of this axis (A-B).   3 - Toggle switch according to claim 2, characterized in that the pivoting arm (5a) carrying the movable contact 13 of the auxiliary inverter is constituted by a pallet whose end (14), opposite this contact, is placed at the interior of a cage (15) also containing the element (20) serving as support for the thrust spring, the assembly being disposed inside a housing (23) provided in the mobile support (3a) of the   main contacts of the remote control switch.