Abstract:
The present invention provides a railroad vehicle which makes it possible: not only to separate a high-voltage cable involving a point of problem and sound high-voltage cables from each other without an operator climbing onto the roof of a vehicle; but also to automatically conduct the separating work without necessity for any special work. The railroad vehicle of the present invention is formed by dispersedly mounting a plurality of vehicles with main power devices that are supplied with power from a power supply line through a pantograph and constitute power supply units. The railroad vehicle includes: a plurality of vehicle units in which respective vehicles are coupled; a cable placed astride the vehicles to connect the power supply unit of each vehicle unit; and a disconnector that is installed at some midpoint in the cable and electrically separates the vehicle units from one another.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to railroad vehicles and in particular to a railroad vehicle suitably applicable to those composed by coupling a plurality of vehicle units dispersedly mounted with main power devices composing power supply units. 
       BACKGROUND ART 
       [0002]    Railroad vehicles composed by coupling a plurality of vehicles adopt a vehicle unit system. In the vehicle unit system, a plurality of vehicles composing one railroad vehicle are mounted with: a pantograph, a power supply unit configured of main power devices, such as a main transformer and a main converter, and an auxiliary power supply device, and auxiliary devices including an air compressor etc. 
         [0003]    For example, the main power devices are dispersedly mounted on four vehicles and four vehicles are taken as one vehicle unit. A plurality of the vehicle units are coupled to compose a railroad vehicle. 
         [0004]    When vehicle units are coupled to compose a railroad vehicle, the railroad vehicle is provided with the same number of pantographs as that of vehicle units. Pantographs are prone to become a source of noise and it is desirable to reduce the number of pantographs. 
         [0005]    Consequently, a high-voltage cable is installed on the roofs of a railroad vehicle and power supply units are connected with one another through the high-voltage cable to reduce the number of pantographs. A shinkansen train composed of 10 vehicles will be taken as an example. When the train is provided with four power supply units, the four power supply units are connected with one another through a high-voltage cable; therefore, a pantograph only has to be provided in two places. 
         [0006]    A high-voltage cable between vehicles in a vehicle unit is connected through a high-voltage joint and a high-voltage cable between vehicle units is connected through a high-voltage joint or a high-voltage insulator. 
         [0007]    If a problem such as a ground fault occurs in a high-voltage cable, it is required to separate (electrically cut off) the high-voltage cable involving a point of problem and sound high-voltage cables from each other to prevent the ripple effect of the problem. 
         [0008]    To electrically separate a high-voltage cable connecting the power supply units of vehicle units, conventionally, an operator must conduct the work described below. The operator climbs onto the roof of a vehicle and separates a connecting wire connecting one high-voltage insulator and the other high-voltage insulator using a tool. This separating work is high-elevation work and sufficient care must be paid to safety. 
         [0009]    Patent Literature 1 proposes a technology with respect to railroad vehicles in which a plurality of power supply units are connected with one another through a high-voltage cable. According to the technology, a plurality of power supply units can be separated from each other without climbing onto the roof of a vehicle. 
         [0010]    A more specific description will be given. Patent Literature 1 describes that: a high-voltage circuit breaker is configured of a vacuum circuit breaker that interrupts power supply to a power supply unit and a mechanical circuit breaker that is connected to the vacuum circuit breaker and cuts off a plurality of power supply units from one another; the high-voltage circuit breaker is placed in an equipment box; and the equipment box is so constructed that the equipment box can be opened and closed and is installed underfloor of a vehicle. After the equipment box installed under the floor is opened, a connecting wire connecting one high-voltage insulator and the other high-voltage insulator of the mechanical circuit breaker with each other is separated by an operator using a tool. Thus the operator need not climb onto the roof of a vehicle and only has to conduct underfloor work to separate a high-voltage cable involving a point of problem and sound high-voltage cables from each other. 
       CITATION LIST 
     Patent Literature 
       [0000]    
       
         Patent Literature 1: Japanese Patent Application Laid-Open No. 2009-136142 
       
     
       SUMMARY OF INVENTION 
     Technical Problem 
       [0012]    According to Patent Literature 1, an operator can separate a high-voltage cable involving a point of problem and sound high-voltage cables from each other only by underfloor work without climbing onto the roof of a vehicle. However, the work under the floor of a vehicle is conducted by an operator separating a connecting wire connecting one high-voltage insulator and the other high-voltage insulator of a mechanical circuit breaker using a tool. This poses a problem to be solved in terms of the improvement of workability. 
         [0013]    The present invention has been made in consideration of the foregoing and it is an object of the present invention to provide a railroad vehicle. According to the railroad vehicle, it is possible not only to separate a high-voltage cable involving a point of problem and sound high-voltage cables from each other without an operator climbing onto the roof of a vehicle; but it is possible also to automatically conduct the separating work without necessity for any special work. 
       Solution to Problem 
       [0014]    To achieve the object, a railroad vehicle of the present invention is formed by dispersedly mounting a plurality of vehicles with main power devices that are supplied with power from a power supply line through a pantograph and constitute a power supply unit. The railroad vehicle is provided with: a plurality of vehicle units in which the vehicles are coupled; a cable installed astride the vehicles to connect the power supply unit of each vehicle unit; and a disconnector that is installed at some midpoint in the cable and electrically separates the vehicle units from each other. 
         [0015]    Specifically, the disconnector is installed at some midpoint in the cable installed on the roof of a vehicle flush with the roof of the vehicle. Alternatively, an equipment box through which the cable passed is installed under the floor of the vehicle and the disconnector is installed at some midpoint in the cable in the equipment box. 
       Advantageous Effects of Invention 
       [0016]    According to the present invention, it is possible to obtain a railroad vehicle in which: it is possible not only to separate a high-voltage cable involving a point of problem and sound high-voltage cables from each other without an operator climbing onto the roof of a vehicle; but it is possible also to automatically conduct the separating work without necessity for any special work. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0017]      FIG. 1  is a drawing illustrating an example of vehicle composition of a railroad vehicle in a first embodiment of the present invention; 
           [0018]      FIG. 2  is a sectional view showing a disconnector adopted in a railroad vehicle in the first embodiment of the present invention as is installed; 
           [0019]      FIG. 3  is a side view of  FIG. 2 ; 
           [0020]      FIG. 4  is a sectional view taken along line A-A of  FIG. 2 ; 
           [0021]      FIG. 5  is a sectional view showing a disconnector adopted in a railroad vehicle in the first embodiment of the present invention as is closed; and 
           [0022]      FIG. 6  is a sectional view showing a disconnector adopted in a railroad vehicle in the first embodiment of the present invention as is opened. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0023]    Hereafter, a description will be given to a railroad vehicle of the present invention based on illustrated embodiments. In the following description, the same parts will be marked with the same reference numerals and a repetitive description of such parts will be omitted. 
       First Embodiment 
       [0024]      FIG. 1  illustrates an example of vehicle composition of a railroad vehicle in a first embodiment of the present invention. 
         [0025]    As illustrated in the figure, the railroad vehicle  1  in this embodiment is composed of 12 vehicles. Two vehicles compose one vehicle unit and the railroad vehicle  1  is composed of a first vehicle unit  2 , a second vehicle unit  3 , a third vehicle unit  4 , a fourth vehicle unit  5 , a fifth vehicle unit  6 , and a sixth vehicle unit  7 . 
         [0026]    Though not specially illustrated, each vehicle unit  2  to  7  is mounted with: a power supply unit configured of a main power device, such as a main transformer and a main converter, and an auxiliary power supply device; and auxiliary equipment, such as an air compressor. 
         [0027]    The power supply unit mounted on each vehicle unit  2  to  7  is connected with high-voltage cables  8 A,  8 B,  8 C,  8 D connected through a high-voltage joint  10  and a trifurcated high-voltage cable head  11 . The high-voltage cables  8 A,  8 B,  8 C,  8 D are supplied with power from a power supply line (not shown) through pantographs  9 A and  9 B installed on the roofs of vehicles. The power supply unit of each vehicle unit  2  to  7  is supplied with power from the high-voltage cables  8 A,  8 B,  8 C,  8 D. 
         [0028]    The pantograph  9 A is installed on the roof of the third vehicle in the second vehicle unit  3 ; and the pantograph  9 B is installed on the roof of the seventh vehicle in the fourth vehicle unit  5 . Since the high-voltage cables  8 A,  8 B,  8 C,  8 D are installed astride vehicles, the high-voltage cables  8 A,  8 B,  8 C,  8 D are flexible to permit changes such as curve passage, bending, and biased tracks. 
         [0029]    In this embodiment, disconnectors  12 A and  12 B for electrically separating vehicle units are installed on the following places: the roof of the fifth vehicle in the third vehicle unit  4  at some midpoint in the high-voltage cable  8 B and the high-voltage cable  8 C; and the roof of the seventh vehicle in the fourth vehicle unit  5  at some midpoint in the high-voltage cable  8 C and the high-voltage cable  8 D. The disconnectors  12 A and  12 B are installed flush with the roofs of the vehicles. 
         [0030]    A more specific description will be given. The disconnector  12 A is installed on the roof of the fifth vehicle and the disconnector  12 B is installed on the roof of the seventh vehicle. That is, cases (to be described later) respectively housing the disconnectors  12 A and  12 B are directly secured on the roofs of the vehicles using a securing means such as a bolt without use of an insulator or the like. The cases are so installed that the disconnectors  12 A and  12 B are opened and closed in the horizontal direction. 
         [0031]    A description will be given to the state of installation of the disconnectors  12 A and  12 B with reference to  FIG. 2  and  FIG. 3 . 
         [0032]    Since the disconnectors  12 A and  12 B are identical in configuration, the disconnector  12 A will be taken as an example in the description of  FIG. 2  and  FIG. 3 . 
         [0033]    As illustrated in the figures, the disconnector  12 A is formed of a vacuum circuit breaker  13 , described in detail later. The fixed side of the vacuum circuit breaker  13  is connected to the high-voltage cable  8 B and the movable side is connected to the high-voltage cable  8 C. The movable side of the vacuum circuit breaker  13  is connected to an electromagnetic operating device  16  through a link mechanism  15 . The movable electrode  17  of the vacuum circuit breaker  13  is actuated through operation with the electromagnetic operating device  16  and the operation of disconnecting from/connecting to the fixed electrode  18  (closing/opening operation) is carried out. ( FIG. 2  shows the disconnector in the open state.) 
         [0034]    Aside from the electromagnetic operating device  16 , the vacuum circuit breaker  13  can also be operated with an air operating device using an air cylinder. 
         [0035]    In this embodiment, the vacuum circuit breaker  13  and the electromagnetic operating device  16  are installed substantially in parallel to each other in the case  19  together with a part of the high-voltage cable  8 C. By installing and securing the case  19  on the roof  20  of the vehicle, the vacuum circuit breaker  13  and the electromagnetic operating device  16  are secured on the roof  20  of the vehicle without use of an insulator or the like. 
         [0036]      FIG. 4  shows in detail the case  19  with the vacuum circuit breaker  13  and the electromagnetic operating device  16  housed in the case as is secured on the roof  20  of the vehicle. 
         [0037]    As illustrated in the figure, the case  19  with the vacuum circuit breaker  13  and the electromagnetic operating device  16  housed in the case is supported by a support plate  21 . The case is secured on the roof  20  of the vehicle by securing the support plate  21  on a first U-shaped hardware  22  directly embedded into the roof  20  of the vehicle with a bolt or the like. 
         [0038]    The case  19  is surrounded with a protection cover  23  except the bottom face of the case. The protection cover  23  is also secured on a second U-shaped hardware  24 , higher than the first U-shaped hardware  22  directly embedded into the roof  20  of the vehicle, with a bolt or the like. 
         [0039]    This configuration makes it possible to secure the case  19  with the vacuum circuit breaker  13  and the electromagnetic operating device  16  housed in the case directly on the roof  20  of the vehicle. 
         [0040]    A detailed description will be given to the structures of the vacuum circuit breaker  13  and the electromagnetic operating device  16  with reference to  FIG. 5  and  FIG. 6 .  FIG. 5  shows the vacuum circuit breaker  13  as is closed and  FIG. 6  shows the vacuum circuit breaker  13  as is opened. 
         [0041]    As illustrated in the figures, the vacuum circuit breaker  13  is roughly composed of: a vacuum valve  25 ; a movable electrode  17  and a fixed electrode  18  opposed to each other in the vacuum valve  25 ; a fixed conductor  26  on one end of which the fixed electrode  18  is secured and to the other end of which the high-voltage cable  8 B is connected; a movable conductor  28  on one end of which the movable electrode  17  is secured and on the other end of which the link mechanism  15  is secured through an insulating rod  27 ; and a connecting conductor  29  one end of which is connected to the movable conductor  28 , the other end of which is connected with the high-voltage cable  8 C, and which electrically connects the movable conductor and the high-voltage cable together. 
         [0042]    A spring contact  30  functioning as a sliding contactor is placed in the contact portion between the connecting conductor  29  and the movable conductor  28 . This allows contact with the movable conductor  28  by the electromagnetic operating device  16 . 
         [0043]    A current collector  31  is provided at the junction between the fixed conductor  26  and the high-voltage cable  8 B. The current collector  31  is surrounded with a first cylindrical enclosure  32  and the insulating rod  27  connected with the movable conductor  28  is surrounded with a second cylindrical enclosure  33 . Each of the first cylindrical enclosure  32 , the vacuum valve  25 , the second cylindrical enclosure  33 , the connecting conductor  29 , and a part of the high-voltage cable  8 C is molded with an epoxy resin  34  and the surface of the epoxy resin  34  is conductively grounded. 
         [0044]    A rubber bellows  14  that expands and contracts following the movement of the insulating rod  27  is supported by a base  35 . One end of the base  35  is supported by a support plate  36  located below the insulating rod  27  and the other end is positioned below the second cylindrical enclosure  33 . A wiping spring  37  is fit between the insulating rod  27  and the support plate  36  located below the insulating rod. 
         [0045]    The electromagnetic operating device  16  is configured of: a coil  38 , a coil bobbin  39 , a movable core  40 , a fixed core  41 , a first drive rod  42 , two movable flat plates  43 ,  44 , a permanent magnet  45 , cylindrically formed iron covers  46 ,  47 , iron supporting plates  48 ,  49 ,  50 ,  51 , a fixed rod  52 , and the like. 
         [0046]    The coil  38  is housed in the coil bobbin  39  placed between the supporting plate  49  and the supporting plate  50 ; and the fixed rod  52  is secured together with the base  35  on the bottom side of the case by using a bolt and a nut. 
         [0047]    The first drive rod  42  is placed at the central part of the coil  38  along the vertical direction. The upper part of the first drive rod  42  is inserted into through holes (not shown) in the movable flat plates  43 ,  44 ; and the lower part is inserted into through holes (not shown) in the supporting plates  50 ,  51 . Thus the first drive rod  42  can freely ascend, descend, and slide. The movable core  40  and the movable flat plates  43 ,  44  are secured on the outer circumferential surface of the first drive rod  42  with a nut; and a second drive rod  54  is coupled to the lower part of the first drive rod  42  through a pin  53 . 
         [0048]    A supporting plate  55  is coupled to the lower part of the first drive rod  42 ; and a ring-shaped breaking spring  56  that draws a circle around the shaft center of the first drive rod  42  is fit between the supporting plate  55  and the base  35 . The breaking spring  56  gives the first drive rod  42  elastic force for breaking the movable core  40  away from the fixed core  41  through the supporting plate  55 . The permanent magnet  45  is placed around the movable core  40  and the permanent magnet  45  is secured on the supporting plate  48 . 
         [0049]    The fixed core  41  is secured on the supporting plate  50  with a bolt. The movable core  40  and the fixed core  41  may be made of pure iron or silicon steel to reduce magnetic reluctance. A slit may be formed in the movable core  40  and the fixed core  41  to shorten operating times. 
         [0050]    The lower part of the second drive rod  54  is coupled to a pair of levers  58  through a pin  57 . The levers  58  are an element of the link mechanism  15  that changes the direction of transmission of driving force by electromagnetic force produced from the electromagnetic operating device  16 ; and the levers  58  are coupled to levers  60  through a shaft  59 . The levers  60  are coupled to an operating rod  62  through a pin  61  and the operating rod  62  is coupled to the insulating rod  27 . 
         [0051]    In the drawings, Reference numeral  63  denotes a control board and  64  denotes a capacitor. The control board  63  is mounted with: a control logic portion that receives power supply as well as a signal according to a closing command (breaking command) from a remote source and performs logical operation to control excitation of the electromagnetic operating device  16 ; a charging/discharging circuit for charging and discharging the capacitor  64 ; a relay and a relay contact for controlling the direction of energization of the coil  38 ; a light emitting diode for indicating the completion of charging of the capacitor  64 ; and the like. 
         [0052]    A description will be given to the closing and opening operation of the vacuum circuit breaker  13  in this embodiment. 
         [0053]    When a closing command is inputted from the driver&#39;s cab of the train to the control board  63 , the coil  38  is energized according to a signal from the control board  63 . A magnetic field is formed around the coil  38  by a route of the movable core  40 -&gt;the fixed core  41 -&gt;the supporting plates  50 ,  51 -&gt;the cover  46 -&gt;the supporting plates  48 ,  49 -&gt;the movable core  40 . Downward attractive force is exerted on the bottom-side end face of the movable core  40  and the movable core  40  is moved to the fixed core  41  side, the movable core  40  being attracted to the fixed core  41 . 
         [0054]    The direction of the magnetic field formed by the permanent magnet  45  at this time is identical with the direction of the magnetic field produced in conjunction with the excitation of the coil  38 ; therefore, the movable core  40  is moved to the fixed core  41  side with attractive force enhanced. 
         [0055]    When the closing operation (attracting operation) is performed by the electromagnetic operating device  16 , the first drive rod  42  is moved downward against the elastic force of the breaking spring  56 . As a result, driving force due to electromagnetic force produced from the electromagnetic operating device  16  is transmitted to the levers  58 . Since the driving force is transmitted to the operating rod  62  through the shaft  59  and the levers  60 , the insulating rod  27  and the movable conductor  28  are moved in the horizontal direction (to the upper side of the drawings). The movable electrode  17  of the vacuum circuit breaker  13  is brought into contact with the fixed electrode  18  and the closing operation of the vacuum circuit breaker  13  is completed.  FIG. 5  illustrates this state. 
         [0056]    In the closing operation of the vacuum circuit breaker  13 , the wiping spring  37  is not contracted until the movable electrode  17  and the fixed electrode  18  are brought into contact with each other. When the movable electrode  17  and the fixed electrode  18  are brought into contact with each other, the wiping spring  37  is contracted and is thereafter continuously contracted until the closing operation is completed. Meanwhile, the breaking spring  56  is constantly contracted during the closing operation of the vacuum circuit breaker  13 . 
         [0057]    When some problem arises in the railroad vehicle and an opening command (breaking command) is given from the driver&#39;s cab of the train to the control board  63 , a signal arising from the opening command is inputted from the control board  63  to the coil  38 . A current is passed through the coil  38  in the opposite direction to that at the closing time and a magnetic field is formed around the coil  38  in the opposite direction to that at the closing time. In this case, the magnetic flux produced from the coil  38  and the magnetic flux produced from the permanent magnet  45  cancel out each other. As a result, the attractive force at the axial end face (the lower face in the drawings) becomes weaker than the elastic force produced from the breaking spring  56  and the wiping spring  37 . Therefore, the movable core  40  is broken away from the fixed core  41  and is moved upward in the drawings. 
         [0058]    When the first drive rod  42  is moved upward in the drawings in conjunction with the movement of the movable core  40 , the operating rod  62  is moved downward in the drawings in conjunction with the upward movement of the levers  58 . The movable electrode  17  of the vacuum circuit breaker  13  is broken away from the fixed electrode  18  and the movable electrode  17  and the fixed electrode  18  are brought out of contact with each other. This completes the opening command (breaking command) for the vacuum circuit breaker  13 .  FIG. 6  illustrates this state. 
         [0059]    When the maintained closed state of the electromagnetic operating device  16  is canceled, the contracted wiping spring  37  is expanded and the movable electrode  17  of the vacuum circuit breaker  13  and the fixed electrode  18  are brought out of contact with each other. Thus the opening operation of the vacuum circuit breaker  13  and the opening (breaking) operation of the electromagnetic operating device  16  are simultaneously performed. 
         [0060]    According to this embodiment, the movable electrode  17  of the vacuum circuit breaker  13  and the fixed electrode  18  can be brought out of contact with each other according to an opening command from the driver&#39;s cab. Thus a high-voltage cable involving a point of problem and sound high-voltage cables can be automatically separated from each other even when the problem such as a ground fault occurs in the high-voltage cable. This makes it unnecessary for an operator to climb onto the roof of a vehicle. It makes it possible to automatically separate a high-voltage cable involving a point of problem and sound high-voltage cables from each other without necessity for any special work at all. 
         [0061]    The disconnectors  12 A,  12 B in this embodiment are secured flush with the roofs of vehicles. That is, the vacuum circuit breaker  13  and the electromagnetic operating device  16  are housed in one case  19  and the case  19  is secured directly on the roof of a vehicle. This prevents increase in the size in the height direction as compared with those secured using an insulator or the like and is advantageous. 
       Second Embodiment 
       [0062]    With respect to the first embodiment, a description is given to a configuration in which the disconnector  12 A is secured at some midpoint in the cables  8 B and  8 C placed on the roofs of vehicles, flush with the roofs of the vehicles. That is, in the configuration, the disconnector  12 A is secured directly on the roof of a vehicle. Instead, for example, such an equipment box as described in Patent Literature 1 through which the cables  8 B,  8 C are passed may be installed under the floor of a vehicle. And the disconnector  12 A configured as described in relation to the first embodiment is installed at some midpoint in the cables  8 B and  8 C in the equipment box. Also in this case, the same effect as that of the first embodiment can be obtained. 
         [0063]    When equipment is installed on the roofs of a railroad vehicle, it is necessary to add a twist to prevent the equipment from becoming a source of noise. For example, the electromagnetic operating device  16  can be connected in series to the high-voltage cable  8   b  and be installed along the length of the high-voltage cable  8   c . This makes it possible to reduce the size of the case  19  in the width direction (the direction of crossties). In this case, even when the above-mentioned equipment is installed on the roofs of a railroad vehicle, the equipment is less prone to be a source of noise. Since the above configuration allows reduction in projected sectional area, this is advantageous in terms of air resistance reduction and noise reduction. 
         [0064]    In the description of the above embodiment, a case where an opening command is issued from the driver&#39;s cab of a train is taken as an example. When an operation switch is provided in a switchboard of a vehicle mounted with a circuit breaker, an opening command may be issued by operating the operation switch. 
         [0065]    The present invention is not limited to the above embodiments and includes various modifications. The above embodiments are described in detail to make the present invention easy to understand and the present invention is not always limited to embodiments provided with all the described configuration elements. A part of the configuration of an embodiment may be replaced with the configuration of another embodiment; and the configuration of some embodiment may be added to the configuration of another embodiment. With respect of a part of the configuration of each embodiment, the part may be deleted from or may be replaced with another configuration element. Or, another configuration element may be added to the part. 
       REFERENCE SIGNS LIST 
       [0000]    
       
         
           
               1  . . . railroad vehicle 
               2  . . . first vehicle unit 
               3  . . . second vehicle unit 
               4  . . . third vehicle unit 
               5  . . . fourth vehicle unit 
               6  . . . fifth vehicle unit 
               7  . . . sixth vehicle unit 
               8 A,  8 B,  8 C,  8 D . . . high-voltage cable 
               9 A,  9 B . . . pantograph 
               10  . . . high-voltage joint 
               11  . . . trifurcated high-voltage cable head 
               12 A,  12 B . . . disconnector 
               13  . . . vacuum circuit breaker 
               14  . . . rubber bellows 
               15  . . . link mechanism 
               16  . . . electromagnetic operating device 
               17  . . . movable electrode 
               18  . . . fixed electrode 
               19  . . . case 
               20  . . . roof of car 
               21  . . . support plate 
               22  . . . first U-shaped hardware 
               23  . . . protection cover 
               24  . . . second U-shaped hardware 
               25  . . . vacuum valve 
               26  . . . fixed conductor 
               27  . . . insulating rod 
               28  . . . movable conductor 
               29  . . . connecting conductor 
               30  . . . spring contact 
               31  . . . current collector 
               32  . . . first cylindrical enclosure 
               33  . . . second cylindrical enclosure 
               34  . . . epoxy resin 
               35  . . . base 
               36  . . . support plate 
               37  . . . wiping spring 
               38  . . . coil 
               39  . . . coil bobbin 
               40  . . . movable core 
               41  . . . fixed core 
               42  . . . first drive rod 
               43 ,  44  . . . movable flat plate 
               45  . . . permanent magnet 
               46 ,  47  . . . cover 
               48 ,  49 ,  50 ,  51 ,  55  . . . supporting plate 
               52  . . . fixed rod 
               53 ,  57 ,  61  . . . pin 
               54  . . . second drive rod 
               56  . . . breaking spring 
               58 ,  60  . . . levers 
               59  . . . shaft 
               62  . . . operating rod 
               63  . . . control board 
               64  . . . capacitor