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182 MARINE REVIEW May, 1924 Mfg. Co. and motors furnished by the Electro-Dynamic Co. The motors are 121%4 horsepower, 725 revolutions per minute, totally enclosed and waterproof. READY TO LAUNCH Control equipment consists of a water- NEW DIESEL DRIVEN proof drum type controller arranged to LAKE FREIGHTER be mounted near the winch on the open deck, with a jam protective panel and resistance to be mounted in a protected place on the ship. Some of the particular features of these winches are their compact de- sign; the fact that the motor is in line with the worm gear housing, leav- ing the lead from the drum entirely free “in either direction and at any angle; and no projections or uncovered gearing of any sort in which the rope or foreign matter may become caught. The main propelling machinery is clas- sified under Lloyd’s and United States rules. The main unit is one 4-cylinder Sun-Doxford opposed piston oil engine, 2-cycle, single acting, solid injection type, having cylinder 2344 inches diam- eter x 91 inches combined stroke. The engines will develop about 3200 shaft horsepower, the revolutions being 85 per minute with a maximum of 90. BLECTRICITY WAS USED FOR FIRST TIME IN RELEAS- ING NEW JAKE VESSEL diately causes an increased thrust to winches are designed for normal pulls Mean effective pressure is about 4 come on the worm, which forces a com- up to 4500 pounds and to withstand over- pounds per square inch. The firing se- pression of the restraining spring and load pulls up to 6000 pounds. They are quence from forward to aft is 1-3-2-4. a slight longitudinal movement of the of the worm gear type having a single The two side rods which are attached worm shaft. This movement is trans- worm gear reduction from the motor to the upper piston are always in ten- mitted to the controller to make con- to the drum. This worm gearing is to- sion both in firing and compression, tact on the first point of the reverse, tally enclosed in a cast iron housing, while the center rod is always in com- releasing the solenoid, causing the motor with worm provided with ball bearings pression. From this, it will be seen to pay out a sufficient length of line to take both the end thrust and the that the balancing feature of each unit until the increase of tension is re- radial load. The worm and bearings js perfect and the shaft practically floats duced to normal, at which time the con- run continuously in an oil bath. in the bearings. Also, it will be noted troller is automatically brought back The electrical equipment consists of that there is no strain on the housings to its neutral position, the solenoid control furnished by the Cutler-Hammer of this engine except to carry the brake sets, and the winch is again locked until a further increzse occurs. Conversely, if the vessel is being load- ed and lowers at the dock, a= slight slackening of the line reduces the thrust on the worm, causes a longitudinal mo- tion of the worm shaft in such direc- tion as to bring the controller on a forward point, winding in the line until the original tension is again assumed, when the controler ‘comes back to neu- tral. Any sudden slackening or _ in- creasing tension may move the controller beyond the first point so as to obtain more speed in the winch for correcting the. tension. Under no circumstances can the winch when operating under power exceed the desired pull on the hawser, as when operating either manu- ally or electrically a mechanical interlock shuts off the power at this point. “ wt i ese ———— eaves? - Re cones i come ih Reo} conn re-Fy ) - pO | m sie et il & a, S F ——t-—} xox KEXEK SH CRaK eM eK x NPORT Electric Hatch Puller Winches Two electric hatch puller winches, e : ae designed and built by the Lidgerwood } eee eS . Mfg. Co., New York, are installed on the vessel for operating the 18-hatch covers by wire lines. These hatch puller FORECASTLE DECK PLAN ON FORD MOTORSHIP