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Equipment Used Afloat and Ashore Revolving Boom Crane—Special Dock Trailer Eliminates Intermediate Rehandling —Lightweight Auxiliary Engine—Inbuilt Type of Compensate d Tubing HE Bucyrus-Erie Co., South Mil- waukee, recently took over the manufacture and sale of the Load- master revolving boom crane former- ly sold by Frederic Poor, tae. New York. ee. This mobile - ‘Grane “with a boom swing of 360 degrees has. a rated e€a- pacity of 3500- ‘pounds, although much heavier loads” can be handled under special conditions, and a maximum working reach. of 14-16 feet. The machine may be, mounted either on crawlers or on rubber tired wheels, in the latter case having the maxi- mum traveling ‘speed of approximate- ly 11 miles per hour. It can be used as a stationary revolving boom crane, as a crane traveling with its load or Loadmaster Revolving Boom Crane aS a tractor. Its extreme mobility and ease of handling give this one- man crane a very wide field of use- fulness. Dock Trailer Eliminates Intermediate Rehandling HE special dock trailer shown. in the accompanying illustration han- dles entire sling loads of freight from ship side to freight cars without any intermediate rehandling or unloading of the sling. Especially designed by Mercury Mfg. Co., Chicago, for dock purposes, these special trailers have a capacity of five tons each, are 5 feet 6 inches wide, 14 feet long, and only 17 inches high. A number of them have just been put into service by one of Special Dock Trailer for Handling Sling Loads 62 the large stevedoring contractors of New York and additional units will be added from time to time. Light Weight Auxiliary Engines Grow in Favor IGHT weight auxiliary engines directly connected to generators and compressors for installation in tug boats, pleasure yachts, etc. are in great demand because they operate on the same kind of fuel as large size marine diesel engines and for this reason eliminate the necessity of carrying gasoline on board ships. The Bolinders Co. Inc., New York, recent- ly added these light weight units to its line of marine engines, type W316A being shown herewith. These light weight oil engines are built into auxiliary units driving air compressors, generators, pumps of all types, hoists, etc. and are made in three sizes, 6-7, 12-15 and 25-30 brake horsepower in one, two and four cyl- inders, respectively. Turning at 1000 revolutions per minute and burning standard diesel grade of oil, they weigh little more than a gasoline en- gine of the same horsepower. The construction of this type of engine is simple. The counterbalanced crank shaft is supported on S.K.F. roller bearings, producing a smooth and vi- brationless drive. A built-in water pump maintains the proper circulat- ing water in the cylinder Jackets at all times. [en SR LE iets al New Inbuilt Type of Compensated Tubing A REVOLUTIONARY type capil- lary tubing in which the com- pensating qualities have been incor- Bolinders 6-7 Brake Horsepower Generator-Compressor-Pump Unit. inches; width, 22 inches ; MARINE REVIEW—May, 1931 porated in the material of the tube itself, has been produced by the Tay- lor Instrument Companies, Rochester, N. Y. No parts are added to the me. chanism of the instrument and no aq. justments are necessary during the life of the instrument. Essentially the new method cop- New Tycos Compensated Tubing sists of so proportioning the volume of mercury in the tubing to its co-. efficient of expansion and to the size of the alloy wire, that any change in the volume of mercury resulting from external temperature changes is accurately compensated. Adjust- ment is made for each varying ex- posure and it is not necessary to compensate the instrument for the average external condition along the length of the tubing, a difficult, if not impossible adjustment to make. To make this new development possible, it has been necessary to de- vise entirely new methods of pro- - ducing the steel tubing, and the fin- ished product is controlled from the standpoints of material, physical properties and accuracy of _ bore, within extremely close limits. This new 7/32-inch O.D. compen- sated tubing is the latest step in the development of Tycos mercury actu- ated tube systems. Length, 100 height, 41 inches; weight, 1300 pounds