according  the invention; FIG.  7  is another  perspective  view  of  the  carriage  of FIG.  6. The carriages according to the invention shown in the  drawings  each  have  a  carriage  support 1,1’ that  can run  along frames or tracks 2,2’ of  a respective sorting apparatus  carriage  on  freely-rotatable  wheels,  rollers  or the like 3,3’. At  opposite,  front  and  rear  ends  of  each  carriage  ends of  support 1,1’ there  is a  pair  of  uprights  4,4’, on  which respective  hinges  4a, 4a’ tiltably support plate supports 5,5’ for a  plate 6,6’ therebetween. Below  the plate 6  and  between  the supports 5 in the carriage according to FIGS. 1 to 5 is a motor-reducer unit, which  makes  plate  6  tilt. Its  motor  7  will  be,  prefer ably, of  the  self-braking electric kind, and  its reducer 8 will be, preferably, axially in line with  motor  7. Electric  feed  to  the  motor  7  takes  place  through  con ducting rods 9 (only one shown) spaced along one of the tracks 2 for the carriageand a sliding contact 10 therefor ?xed  to the carriage support 1. Particularly ?t is a permanent  magnet  direct current motor 7  having  distinct  acceleration  characteristics allowing  precise control of  plate rotation. One  of  the  supports  5  for  the  plate  6  has  an  opening  11 (FIG. 2) with a seat 11a for a pin 12 (or the like) for locking  the plate in an  horizontal position. There are also,  therefore,  devices  (not shown) of known  type, e.g. an  electromagnetic, for unlocking  the support for  tilting the  plate. Having  the  motor  7  and  reducer  8 in line saves  space to a certain extent, and  allows both  to be held inside a single  preferably  cylindrical  container  13.  The con tainer  protects these  parts against  dust  or  other  foreign bodies. To  stop  tilting  the  plate, micro-switches  14  or  the  like spaced on one upright 4 are actuated by cams 15 se cured  to one  of  the supports 5 for the  plate. In  the  carriage  of  FIGS.  5  and  6, a  step-by-step  motor 16 is  used in place of  motor  7  and reducer 8.  It is  di rectly linked to place  6’ by  an  arc  of  a  pinion-coopera tive hoop 17 secured to the plate 6'  and a pinion 18 mounted  on  a  shaft of  motor  16. Operation  of  either  carriage  (with  reference,  too, to  a few  further details) takes place  as follows The  carriage  is dragged  along  frames  or  tracks  2,2’ of the  sorting  machine  by  a  chain 19  (FIG. 3) or  a  belt 20 (FIG.  6)  driven  by  a  central  motor  (not  shown).  As  each carriage passes before loading and coding zones (not shown),  the  operator  lays the  article to  be  sorted  down on  plate 6,6’ and makes a known  coding for directing the object towards  a  thereby selected collecting zone. A  microprocessor (not shown) programs the whole apparatus, sending  electric feed  to  the  conducting  rod  9 (not  shown  for  the  carriage  of  FIGS.  6  and  7) when  the carriage passes that selected collecting zone. The  motor  7, 16  then  takes  current  from  the  conduct ing rod 9 through sliding contact 10, causes the plate 6,6’ and  supports 5,5’ to tilt  and, thus, unloads the ob ject. At  the  end  of  such  a  tilting stroke  with  the  carriage  of FIGS. 1 to 5, a  cam  15  acts  on  a  microswitch  14  to  stop the stroke and automatically control reverse tilt  until plate  6  is brought  back  to  the  horizontal  position  shown. This is  checked by a photocell  21  or an analogous known  system  connected  to  control  the  motor  7, too. In the case  of  the  step-by-step motor  16  of  the  carriage  of FIGS. 6 and  7, the cell 21  is obviously unnecessary, as this kind of  motor  permits exact tilting rotation. The  advantages  of  the  particular  arrangements  of  the parts of  the  carriages according  to the described  above are clearly visible.  First of  all,  electrically tilting  the plate makes the structure considerably lighter and al lows  the  carriage to reach  much  higher  speeds  分类机英文文献和中文翻译(2):http://www.youerw.com/fanyi/lunwen_24486.html