﻿1044 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [70] 
  

  

  CLAIMS. 
  

  

  " 
  A 
  net 
  of 
  bag 
  shape, 
  for 
  fishing 
  sponges 
  or 
  the 
  like, 
  having 
  attached 
  

   to 
  the 
  mouth 
  thereof 
  a 
  frame, 
  one 
  portion 
  of 
  which 
  is 
  composed 
  of 
  metal 
  

   or 
  other 
  weighty 
  material, 
  and 
  the 
  remainder 
  of 
  wood 
  or 
  other 
  buoyant 
  

   material, 
  substantially 
  as 
  and 
  for 
  the 
  purpose 
  described. 
  

  

  No. 
  279792. 
  

  

  (Edwin 
  Paterson, 
  Port 
  Washington, 
  N. 
  Y. 
  ; 
  pateDted 
  June 
  19, 
  1883; 
  oyster 
  dredge. 
  

   See 
  Plates 
  LXXXIX 
  and 
  XC.) 
  

  

  The 
  object 
  is 
  to 
  gather 
  oysters 
  from 
  the 
  bed 
  clean, 
  and 
  easily, 
  and 
  

   rapidly. 
  

  

  Hinged 
  in 
  loops 
  that 
  are 
  attached 
  to 
  the 
  frame 
  above 
  foot-pieces, 
  are 
  

   two 
  corresponding 
  shafts 
  which 
  have 
  secured 
  to 
  them 
  removable 
  grap- 
  

   pling 
  arms 
  or 
  teeth. 
  The 
  ends 
  of 
  the 
  shafts 
  are 
  bent 
  toward 
  the 
  center 
  

   of 
  the 
  frame 
  to 
  form 
  cranks 
  and 
  the 
  ends 
  of 
  these 
  cranks 
  are 
  attached 
  

   to 
  the 
  lower 
  ends 
  of 
  a 
  vertically-sliding 
  bail 
  by 
  connecting-rods 
  which 
  

   are 
  hinged 
  at 
  their 
  ends 
  to 
  the 
  ends 
  of 
  the 
  bail 
  and 
  the 
  ends 
  of 
  the 
  

   cranks, 
  so 
  that 
  upon 
  the 
  upward 
  movement 
  of 
  the 
  bail, 
  which 
  takes 
  

   place 
  when 
  the 
  dredge 
  is 
  lifted 
  out 
  of 
  the 
  water, 
  the 
  shafts 
  will 
  be 
  

   turned 
  upward, 
  bringing 
  the 
  cranks 
  to 
  a 
  vertical 
  and 
  the 
  grappling- 
  

   arms 
  to 
  a 
  horizontal 
  position, 
  and 
  upon 
  the 
  downward 
  movement 
  of 
  

   the 
  bail, 
  which 
  takes 
  place 
  when 
  the 
  dredge 
  is 
  being 
  lowered 
  into 
  the 
  

   water, 
  the 
  shafts 
  will 
  be 
  turned 
  downward, 
  bringing 
  the 
  cranks 
  to 
  a 
  

   horizontal 
  and 
  the 
  grappling- 
  arms 
  to 
  a 
  vertical 
  position, 
  so 
  that 
  the 
  

   points 
  of 
  the 
  grappling-arms 
  will 
  properly 
  penetrate 
  the 
  mud 
  at 
  the 
  

   bottom. 
  The 
  dredge 
  is 
  raised 
  out 
  of 
  the 
  water 
  by 
  ropes 
  attached 
  to 
  

   the 
  bail, 
  and 
  is 
  lowered 
  into 
  the 
  water 
  by 
  ropes 
  attached 
  to 
  the 
  frame 
  

   of 
  the 
  dredge. 
  A 
  brush 
  frees 
  the 
  oysters 
  from 
  mud 
  just 
  before 
  or 
  just 
  

   after 
  they 
  are 
  lifted 
  out 
  of 
  the 
  water. 
  The 
  brush 
  slides 
  upon 
  bars 
  held 
  

   across 
  the 
  frame 
  of 
  the 
  dredge 
  by 
  cross-pieces, 
  angle-plates, 
  and 
  screws, 
  

   and 
  may 
  be 
  drawn 
  forward 
  over 
  and 
  in 
  contact 
  with 
  the 
  oysters 
  on 
  the 
  

   grappling-arms 
  against 
  the 
  tension 
  of 
  a 
  spring, 
  by 
  means 
  of 
  a 
  rope 
  

   the 
  spring 
  serving 
  to 
  draw 
  the 
  brush 
  backward 
  upon 
  the 
  cord 
  being 
  

   released. 
  The 
  brush 
  may 
  be 
  adjusted 
  vertically, 
  so 
  that 
  its 
  bristles 
  

   will 
  come 
  properly 
  in 
  contact 
  with 
  the 
  oysters 
  on 
  the 
  grappling-arms, 
  

   by 
  turning 
  the 
  screws 
  which 
  will 
  raise 
  the 
  angle-plates 
  which 
  are 
  held 
  

   in 
  the 
  vertical 
  channel- 
  bars 
  for 
  that 
  purpose. 
  These 
  channel-bars 
  also 
  

   serve 
  to 
  keep 
  the 
  brush 
  from 
  lateral 
  or 
  endwise 
  movement. 
  The 
  rope 
  

   for 
  operating 
  the 
  brush 
  passes 
  over 
  a 
  pulley 
  attached 
  to 
  the 
  angle-plate, 
  

   and 
  thence 
  over 
  the 
  derrick-arm 
  back 
  to 
  the 
  scow 
  ; 
  but 
  the 
  brush 
  might 
  

   be 
  arranged 
  upon 
  the 
  opposite 
  side 
  of 
  the 
  dredge, 
  or 
  the 
  dredge 
  be 
  

   turned 
  around, 
  in 
  which 
  case 
  the 
  rope 
  might 
  pass 
  directly 
  from 
  the 
  

   brush 
  to 
  the 
  scow, 
  and 
  the 
  pulley 
  then 
  be 
  dispensed 
  with. 
  An 
  air- 
  

  

  