tension are registered on a gage. A metering 

 sheave and counter are also attached to the 

 dynamometer as shown in figure 6-8. 



Figure 6-8. Deep-sea dynaiii.ometcr on a U. S. Navy 

 oceanographic survey ship. 



6-36 Retrieving the Core. — The instant the 

 tripping weight hits the bottom the winch must 

 be stopped to immobilize the piston in the cor- 

 ing tube. The upward movement of the release 

 arm, caused by the trigger weight striking the 

 bottom, frees the corer from the release mech- 

 anism allowing it to penetrate the sea bottom. 

 The falling corer will take up the slack in the 

 wire and stop the downward movement of the 

 piston just above the bottom. The corer itself 

 will continue on past the piston into the bottom. 

 To haul the corer free of the bottom, the same 

 method is used as given in section 6-19 for the 

 Phleger corer. During hoisting, the piston sup- 

 ports the entire weight of the corer. 



When the release mechanism is at deck work- 

 ing level bring in the trigger weight and remove 

 the release mechanism from the wire. Now 

 hoist the corer to the deck and bring aboard. 

 The KuUenberg will usually have to be laid 

 on deck or in a cradle to remove the sample. 

 Care must be taken not to allow the nose end 

 of the coring tube to be raised higher than the 

 upper end. Keep the nose down at all times. 



6-37 Removing the Core Sample and Re- 

 cording the Core Data. — As soon as the corer 

 is on deck, measure the length of sediment visible 

 on the outside of the instrument and record 

 this in the Penetration column of the M-sheet. 

 This log sheet is described in chapter 14. Next, 

 carefully remove the cutting edge and core 

 catcher and insert a rubber stopper into the 

 bottom of the liner or cover with a plastic cap. 

 Put any sediment retained by the cutting edge 



H. O. 607 



and core catcher in a sample jar. Remove the 

 setscrews from the upper end of the coring tube, 

 and carefully withdraw the tube and liner from 

 the mainweight. Extract the liner from the 

 coring tube. If the liner is not completely filled 

 to the top with sediment, fill the empty portion 

 with glass wool and insert a rubber stopper 

 firmly into the top or cover with a plastic cap. 

 Tape both ends and seal with wax. Measure 

 the length of the core sample and record this 

 on the M-sheet, along with a description of the 

 core. Fill out and attach a core label in the 

 same manner as given in section 6-21 for the 

 Phleger corer. 



6-38 Securing the Corer. — After each lower- 

 ing, all parts of the KuUenberg piston corer must 

 be washed. The cutting edge, core catcher, 

 coring tube, piston, and mainweight must be 

 well rinsed to remove all evidence of bottom 

 material from a previous coring operation. All 

 parts are then dried and a light coating of 

 machine oil is applied to them with particular 

 emphasis to the inner walls of the mainweight 

 and coring tube. 



6-39 Maintenance of the KuJIenberg Piston 

 Corer. — Because of its sturdy construction, the 

 KuUenberg piston corer generally requires little 

 maintenance. However, the cutting edge may 

 chip or be dented should the corer hit hard or 

 rocky bottom. If not too badly damaged, the 

 cutting edge may be hammered and filed back 

 into shape. Core catcher springs must be 

 watched for free play of action. Usually these 

 springs can be reshaped quite easily. As these 

 springs are delicate, care in the handling and 

 packing of core catchers must be taken. Need- 

 less to say, damage to this important unit of 

 the corer will result in unwarranted loss of 

 samples. The interior of the coring tube and 

 mainweight should be wire brushed, wiped clean 

 with rags, and oiled after each lowering. Rust- 

 ing and pitting will prevent entrance of the 

 liner. When necessary, the exterior of the corer 

 should be wire brushed and a protective coat of 

 red lead applied. 



6-40 Packing, Storing, and Shipping of 

 Kullenberg Cores. — To prevent disturbance 

 and damage of the Kullenberg core the sealed 

 liner should be stored in an upright position. 

 For this purpose a special shipping case should 

 be provided. This case should be wooden, 

 compartmented to hold a number of short 

 cores in an upright position, and provided 

 with a screw-fastened top. The case must 

 be plainly marked "Handle With Care" and 

 "This End Up" and must be packed, stored, 

 and shipped in an upright position at all times. 

 It should be marked with the ship's name and 



61 



