Page 34: of Maritime Reporter Magazine (August 1983)

Deck Machinery

Kocks/Salzgitter (continued from page 34) tainer cranes for seaports, the

Kocks Crane and Marine Com- pany (KCM) of Pittsburgh, Pa., has concluded an agreement with one of the Salzgitter Group of com- panies for supplying all of its bulk materials handling products for the U.S. market. The new venture will be identified as Salzgitter-

Kocks Bulk Systems and will op- erate as a division of KCM.

Richard W. Theobald, execu- tive vice president of KCM, plans to expand the firm's container crane activity and further develop KCM's interests with the major port au- thorities around the U.S. through bulk handling projects.

Market areas being looked at are seaports, inland terminals, utilities, and general bulk com- modities terminals including ce- ment and grain industries. The company's diverse product line in- cludes every conceivable material handling and storage system . . . pneumatics, belt conveyors, min- ing, ship loading/unloading, in- door storage, and stacking and reclaiming.

LAKE SHORE

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Among the noteworthy applica- tions of deck cranes from Lake

Shore, Inc., Iron Mountain, Mich., were the cranes installed on the

Moore McCormack Lines ship con- version performed by American

Ship Building, Tampa, Fla., and

Lorain, Ohio Divisions. These cranes, rated at 40 metric tons at 65.5 feet radius, are all electric, utilizing solid state SCR con- trolled General Electric D.C. drives.

They have both wide boom tips and tagline winches to reduce load pendulation and were manufac- tured in Iron Mountain under li- cense from Clarke Chapman Ma- rine—U.K. The first shipset of three cranes was designed and de- livered in less than 12 months.

In addition, Lake Shore designs and manufactures a full line of deck machinery, including moor- ing, cargo, hose, topping, anchor handling, and traction winches; anchor windlasses, life-boat dav- its; and cranes for cargo handling, hose and stores handling for ocean,

Great Lakes, offshore or Navy ap- plications. Types of drive systems supplied include hydraulic, elec- tro-hydraulic, diesel, static D.C., wound roto A.C., and variable fre- quency A.C.

Lake Shore specializes in cus- tom designed machinery to meet customer specifications.

McELROY MACHINE

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McElroy Machine and Mfg. Co.,

Inc. of Biloxi, Miss., began fur- nishing deck machinery to the off- shore workboat industry in early 1980. The company now has three very successful years and has ma- chinery working in all parts of the world.

The latest additions to Mc-

Elroy's standard line of anchor windlasses, anchor winches, cap- stans, and towing winches is a line of self-contained electrohydraulic tuggers and a line of stern rollers.

The hydraulic tugger is manufac- tured in a 5-ton line pull model and a 10-ton model. A 15-ton and 20-ton model are on the drawing boards for the future.

The stern rollers are manufac- tured as a standard model or a heavy-duty model. Custom sizes are also available upon request.

Some of the latest installations have been hydraulic tuggers aboard the last Nicor Boat built at Moss

Point Marine in Escatawpa, Miss., anchor windlasses for the Gulf

Fleet boats being built at St. Louis

Ship, and the Gulf Fleet boats being built at Quality Shipyards in Houma, La.

Additionally McElroy Machine is furnishing the capstan and ver- tical capstan/windlasses for the split hopper dredge being built at

Southern Shipbuilding, Slidell, La., and the vertical capstans for the landing craft being built by Cham- pion Swiftships of Pass Christian,

Miss.

McElroy Machine has a com- plete engineering and design de- partment to assist with special or custom specifications and ma- chinery.

MARATHON LeTOURNEAU

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Marathon LeTourneau Com- pany introduced its new line of marine pedestal cranes with solid- state electronics at the 1983 Off- shore Technology Conference.

The three new solid-state cranes are: the 50-ton-lift-capacity PCM- 120SS; the 55-ton-lift-capacity

PCM-220SS; and the 75-ton-lift- capacity PCM-350SS. All three can be supplied with standard and optional features that make it easy to tailor the cranes to perform all the materials, equipment, and per- sonnel lifting requirements of off- shore drilling platforms.

All three cranes have a single

AC power source rather than a motor-generator arrangement. Mi- croprocessors rather than electri- cal switch gear control power flow to all drive motors. Since each electric motor is individually and precisely controlled by means of solid-state technology, the new cranes function with a high degree of efficiency, offer faster lifting speeds with loads, and feature smoothness of operation. The solid- state controls also provide precise control of current flow, voltage, and operating temperatures. These factors translate into extended service life and minimum required maintenance for motors, gears, and other moving parts.

Electrical power requirements for all three solid-state marine cranes are the same: standard commercial 600-volt, 60-Hertz, 3-phase, 500-ampere external sup- ply. An integrated solid-state S.C.R. control system provides DC power to each drive system. Peak power requirement, under maximum load, dual function, 20-minute continu- ous duty with DC dynamic brak- ing, is 250 KVA at 0.7 power factor.

All three cranes have regenera- tive electrical braking during low- ering operations. In addition, there is a multiple disc "fail-safe" hold- ing brake for each function which is automatically activated when a particular function is completed.

In addition, brakes are also auto- matically applied if power supply is interrupted.

The power system for all three cranes consists of Marathon Le-

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