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Equipment Used Afloat and Ashore Gas Lift Truck—Welded Cylinders—Feed Pumps—Acetylene Generator—New Diesel HE accompanying illustration VD ikces a three-ton gas operated industrial lift truck recently devel- oped by The Elwell-Parker Electric Co., Cleveland. For more than 25 years this company has built elec- tric trucks and more recently gas- electric trucks. With the straight gas trucks now completing the range of power, it is possible to select the kind of power and the type of ma- chine best qualified for the work. In developing the new gas truck utmost care has been taken in en- gineering design and in exhaustive trials under service conditions, Com- bined with simplicity of design a number of advanced features have been incorporated to adapt the new unit for specific services. The controls, for example, are within easy reach of the operator’s right hand while the dials and indi- eators are immediately before him on the instrument board. A single pedal controls both the brake and the clutch. Pressing down on the pedal, releases the brake and en- gages the clutch. Releasing the pedal, automatically disengages the clutch and then applies the brake. The brakes are set the instant the operator steps off the platform or lifts his foot. There is also a fur- ther protection, especially when the loaded truck is standing on grades, by a transmission gear lock, The hydraulic type of hoist mech- anism on this truck receives fluid under pressure from a pump driven directly by the motor. The cylinder through a balanced lift, elevates the platform, mounted on rocking links. Extra clearance beneath the platform has been provided by placing the hoisting cylinder high in the truck. Unusually rapid pick-up and am- ple power, under instant control, for operating emergencies such as climbing steep ramps, are character- istics of the new trucks. The de- sign is rugged and-the truck has stability of travel, combined with quiet performance, Arc Welded Cylinders OMETHING new in the construc- S tion of diesel engines is being tried out by F. B. Stearns, Cleve- land. An experimental diesel en- gine for marine use is being built wtih are welded cylinders, To save weight and space, arc welded steel is being used for cyl- inders and other parts. The cylin- ders under construction are for a 320-horsepower diesel engine operat- ing at 1300 revolutions per minute. The welding was done by The Thornton Co., using welding ma- chine best qualified for the work. Boiler Feed Pumps ULTI-STAGE centrifugal boiler feed pumps of the Cameron type, for pressures up to 600 pounds, are manufactured by Ingersoll-Rand Co; Philipsburg, NJ: An interesting feature of this type of pump shown in the accom- panying illustration is the hydraulic balance obtained by placing an equal number or impellars back to back. New type 3-ton gas opera ted industrial lift truck MARINE REVIEwW—July, 1934 Engine— Tailgate Elevator This arrangement eliminates high pressure stuffing boxes. Of the two stuffing boxes used, one is under second stage pressure, the other is under suction pressure, The casing of the pump is split horizontally, allowing the entire ro- Multi-stage centrifugal pwiip tor to be removed from the pump without disturbing bearing adjust- ments, exposing bearings to contact with dirt or moisture, or disconnect- ing any part of the piping. New Acetylene Generator NEW type of portable acety- lene generator has been devel- oped by the Linde Air Products Co., 30 East Forty-second street, New York. It is intended for portable service only, and is designed to with- stand the abuse encountered in such service. With a carbide capacity of 150 pounds, the new generator is especially serviceable wherever large seale welding operations must be carried out on the job. The generator is listed as stand- ard by the Underwriters’ Laboratories Ine; It is rated to produce 300 cubic feet of acetylene per hour, and weighs 750 pounds empty. It is 87 inches in height overall and 42% inches in diameter. Fully charged, the generator weighs 2250 pounds, The feed is of gravity type. The mechanism is of an advanced de- sign. The feed control unit is self- contained and is bolted to the inside of the carbide hopper. The feed valve unit is actuated by a dia- phragm. Pressure on the diaphragm is exerted by a house and loaded spring unit. The spring is encased in a small housing and set at the factory to deliver about 13 pounds per square inch pressure. This can be changed within a range of about two pounds per square inch by an external adjustment. The set pres- sure feature does away with the necessity of setting the pressure when the machine is started. 25