I  have  shown a second photo electric  scanning eye 140 which is  like the one previously described.  The eye 140 is  similarly  dis posed within a housing 141 mounted on a separate slide carriage  142 which is  secured  to  the  outer  end of the piston  143  of  another  ?xedly  supported  double-acting air  cylinder  144,  said  housing being shiftable  back and forth transversely of the apparatus on the cross member 46 previously referred to,  and compressed air being ad mitted  and exhausted from said  cylinder under control of a magnetically-actuated valve 147.  Engaged in sepa rate  guideways 131 on the trays  27 are  slides  132 with upstanding pins  133 which  are  adapted  to  be engaged by a pusher projection 148 also af?xed to the piston rod of the cylinder 144. ‘Placed  upon  a shelf 50 below  the upper  run of  the con veyer is  a longitudinally-arranged series of bins or recep tacles  Rl-R13 respectively  receiving  differently  propor tioned  stockings.  Above the locations  of the bins  R1— R13, the horizontal ?anges 22a and 122a of the supple mental longitudinals  22 and 122 have cut-outs  or voids 52 and 152 which are uniformly spaced  to  correspond with the  spacing of  said bins.  These cut-outs or voids 52 and 152 are normally closed by withdrawable slides 53 and 153 which are  operatively  connected inpidual ly  to  the  spring  retracted  piston  rods  of  actuating  air cylinders  55  and  155  respectively.  Extending  to  the cylinders 55 and 155 are branches 56 and 156 of a pip ing system 60  which  is in communication, through a main 61  (see  Figs.  3  and 4),  with  a suitable  supply  source (not shown)  of compressed air.  Interposed in  each of the pipe branches 56 and 156 are magnetically-actuated control  valves 62 and 162; and interposed in the main  61, see Fig. 3, is  a manual shut-off valve 65,  a strainer  66, a pressure regulator 67 and a lubricator 68.  As shown in Fig.  3,  the  magnetically-actuated  control valves  47 and 147 for the cylinders  44 and 144 are connected to  the piping  60 by tubes  74 and 174.  Inward movement of the  sensing  eye  40  is  initiated  through  actuation  of  a switch 75 which is  secured  to  a  pendent projection  76 of bracket 45  (see Figs.  12,  13), the operating arm 77 of said switch extending into the path of the pivot lugs 25 of the trays 27 at one side of the machine.  Similarly, the inward movement of the sensing eye 140 is  initiated through actuation of a switch 175 which is  secured to a pendent projection 176 of the bracket 145 (see Figs.  14 and 15)  the operating arm 177 of said switch extending into the path of the heel stops 30 of the trays 27 at the other side of the machine. Diagonally arranged above the conveyer, with one end thereof supported by the cross member  46 and the other end  thereof  supported  by a  cross  member 70  further along in the machine, is  a bar 71 whereto is  secured at the bottom at  intervals  corresponding to  the  spacing of the voids  52 in  the  longitudinals  22  and  122,  a  series of  electric switches L1, L2, L3  and L4, which are adapted to be closed inpidually by the studs 33 differently posi tioned on said  trays by the action of the pusher projec tion  48 associated with the  carriage  of the  sensing eye A?ixed to  another bar  171 supported like  the bar 71 by the cross members 46 and 70 is  a series  of micro switches H1, H2  and H3  which are adapted to be closed inpidually  by the  studs  133  differently  positioned  on the trays  by the action of the pusher projection 148 as sociated  with  the  carriage  of  the  sensing  eye  140,  and thereby complete electrical  circuits  for the  actuation of the magnetic valves  62 and 162 that  control the opera tion of the slide withdrawing cylinders 55 and 155. Upon being successively released to  swing downward about the  lugs  25 on the  chains  2,  the  trays  drop  the stockings  of di?erent lengths and high heel proportions into the proper receivers as also later on explained, their fall  being  controlled  by cooperation  of  their  rear  lug projections  29a with ?xed inclined  angle section  guides 81 (Figs.  1  and 2)  which extend downwardly and rear wardly from longitudinals  22 and 122 and of which the bottom ends are rearwardly curved on a relatively short’ radius.  Before rounding the  sprockets  4,  the  trays  27 are  once again  leveled by cooperation of  the  rear lugs 29a with other ?xed guides 82 and, as the chains 2 pass down from  the  sprockets  4  to  the  sprockets  6,  said trays are controlled by  engagement  of their said rear lugs 29a with ?xed vertical guides 83 whereof the lower por~ tions  are  rounded as  at  8311  toward the last  mentioned  f sprockets to merge with horizontal guide rails  85 secured to  the frame  1 below the bottom longitudinals  18.  As the  lower runs  of  the  chains  2  move horizontally  to ward the front or feeding end of the machine, the trays 27 are kept level as their rear lugs 29a ride the rails  85.‘ From  Fig.  1,  it  will be noted that the rails  85 terminate somewhat forward of the sprockets 5 to  keep control of the  trays  until  they  assume a  vertical  position  in  sus pension.  During  horizontal  travel  of  the  trays  27  in the lower part of the machine, the slides  32 and 132 on them are restored to their  original positions by engage ment  of the studs 33 and 133 with the inclined edges 86a and 186a of  cam bars 86  and 186 a?ixed  to  frame 1, see  Figs.  5,  7  and 8.  As the  trays  move upward and round the sprockets 3 they are prevented from swinging by engagement of  their  tail  lugs  29a with  the pendent frontal  end portions  22b and 122b of the rails  22 and 122.  1 Referring now to the diagram of Fig.  16,  the current for the energization of  the various electrical instrumental ities  hereinbefore  described is  supplied from the mains 90, 91, say of a 220 volt A. C. 袜子分拣机英文文献和中文翻译(2):http://www.751com.cn/fanyi/lunwen_27347.html