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March, 1924 Name Db, V. Stratton Head of Drydock Company George C. Clarke has. resigned as president of the New York Harbor Dry Dock Co., Inc., New York, due to the demands of his other business interests. D. V. Stratton succeeds him as _presi- dent. He has had an extended experi- ence in marine construction and repair work. Following a number of years of contact with general marine and dredg- ing operations, he was chosen during the war to organize a number of large steel-building yards for production. Following the ship construction period, Mr. Stratton went to Europe to assist J. E. Sheedy, vice president of the Emergency Fleet corporation in the re- organization of the forces of the ship- ping board in Europe. During this time, Mr.) Stratton made a: study of: the problem of ship maintenance and opera- tion in the various European shipping countries. During the course of this work, he visited all of the principal building and repair plants of Europe with a view of comparing them from the standpoint of equipment, organiza- tion and control methods, with the plants of the United States. The future tend- encies in ship design and construction, particularly with reference to diesel drive, were made a special and careful study. Upon his return to the United States, he entered the organization of the Morse Drydock & Repair Co., Brook- lyn, in charge of business development, a connection he now resigns. Ice Machine Proves Success on Lakes (Concluded from Page 113) have steam driven equipment. But as in all other lines of engineering, rapid strides are being made in re- frigeration, and electricity today has assumed a leading position as the practical power to be applied to the operation of an ice machine. Engineers of the Phoenix Ice Ma- chine Co., Cleveland, have made a careful study of marine requirements with a view to overcoming any objec- tion to ammonia systems, stuffing box troubles, need for manual labor to operate plant and improper cooler de-" sign. Criticism of the use of ammonia on vessels has frequently come from lack of knowledge. Ammonia piping when properly installed by competent me- chanics is not nearly as dangerous as steam oor gas can be. The low side piping of an ammonia plant Op- erates at a maximum pressure of 30 pounds while the high side seldom reaches 200 pounds. Every part of the system is tested out to 300 pounds MARINE REVIEW pressure before being charged with ammonia. Every possible safety device of merit is used on the machine and auxiliary equipment throughout. The compres- sor has a safety relief valve on the discharge side which opens at 250 pounds pressure and is by-passed into the suction side which prevents pos- sible chance of blowing a_ cylinder head out. Between the compressor and oil trap, a by-pass check valve is placed to prevent a possible es- cape of ammonia in case of a_ bad D. V. STRATTON Newly elected president of the New York Har- bor Dry Dock Co., Inc. break in the piping between these parts. On the ammonia receiver, a safety relief valve is placed which is piped to outside atmosphere through a diffuser when the safety valve lets go. The ammonia compressor illustrated is of the company’s latest design. It incorporates some new features. C. L. Steglich, chief engineer and de- signer of the Phoenix company, has had- considerable experience in_ ice machine design, having served at va- rious navy yards. Accessibility to make repairs is of the utmost importance on ship equip- ment. The cylinders of these com- pressors are separate from the crank- case and are easily taken off, bored and replaced. A large manhole cover on the crankcase gives ample room to make adjustments to the bearings. The connecting rods are constructed so as to take up the wear without los- ing the efficiency of the compressor. The stuffing box is the outstanding feature of the compressor. Every engineer knows that stuffing boxes 117 On ice machines are trouble makers, because they will become hot. or cold intermittently. When too cold, they leak and if tightened up _ too tight the packing will burn. The Phoenix engineers state that this dif-. ficulty has been entirely overcome. The stuffing boxes are so designed that the packing has ample room for expansion and contraction while a special compression system keeps the stuffing box jammed with grease to prevent leakage of ammonia as well as to insure long life without adjust- ments. The flywheel of the compressor is a part of the chain drive. It is cut the same pitch as the chain and mo- tor pinion. The pillow block bear- ing is ring oiling like a motor. All new equipment developed for ships means another piece of machin- ery for the engineer ‘to look after. This is nearly overcome in ice 'ma- chine electrically operated by ther- mostatic control since only a mini- mum amount of attention is needed. The motor-driven, ice machine is lo- cated on one of the decks below the refrigerator. This machine is so equipped with special electrical devices that it will start and stop as the tem- perature of the cooler varies and af- fects the room thermostat which is set for the proper degree of coldness. In some cases a water pump _ is connected on tthe same shaft of the ice machine for delivering water to the ammonia condenser. A _ 3-horse- power motor operates a 14%4-ton com- pressor. Receives Big Order for Condenser Tubes The American Brass Co., Waterbury, Conn., was recently awarded a contract for 750,000 pounds of admiralty con- denser tubes by the Shipping Board Emergency Fleet corporation. The or- der came immediately after the com- pany had completed shipments to the same, buyer of 250/000 lengths of condenser tubes weighing 1,100,000 pounds. Since it operates the largest number of vessels controlled by any one Ameri- can shipping concern, the shipping board is the largest buyer of condenser tubes in this country. The specifications under which these tubes are manufactured and which govern the selection of all con- denser tubes for shipping board vessels, are exacting. The board of harbor commissioners announce the construction this year at Vancouver, B. C., of a coal shipping terminal to cost $500,000.