New York City TWO thirds of the voters in New York City News and Illustrations Items of Interest to City, Town and County Officials, and Others Concerned with the Economical Construction and Efficient Operation of Public Improvement Undertakings The tube coupling joints are made easily: the nut is slipped over the end of the tube, allowing the tube to protrude slightly beyond the end of the nut; the flaring tool is inserted with a sharp strike of the hammer, and then the joint is made. There are no threads to cut, no thread compound, no rubber washers, no soft, pliable metal in making this secure, leak-proof joint. The couplings adjust themselves to the tube and flare variation so that tight metal-to-metal joints are automatically ance with the customary specification of service pipe fittings for water and gas services and for plumbing work. Tube coupling outlets are machined to standards which permit the use of heavier wall tube than specified as standard, or, where desired, lighter wall tube may be used. Tube couplings and fittings are made in all shapes and sizes, to meet every requirement. Fittings with special threads for meter connections, branch fittings or other special shapes can also be supplied. A New Portable Oil Burner A new torch-style portable oil-burner unit has recently been placed on the market by Littleford Bros., 500 East Pearl Street, Cincinnati, Ohio. It provides at a very low cost an intense heat which is easily and quickly controlled and adjusted, and which can easily be moved from place to place. These oil burners are used to dry holes in streets before patching them. They are also employed successfully for concrete heating in connection with winter construction work, heating mortar in cold weather, thawing frozen piles of sand, gravel, coal, coke, stone, etc., heating asphalt in melting kettles, drying concrete tunnels and subways for waterproofing, thawing frozen ground before excavating, melting ice and snow off street manhole covers, thawing frozen hoppers of coal cars and frozen - railroad switches, and many other operations. Contractors and state highway departments are finding these oil-burner units necessary equipment for general and emergency use. CROSS-SECTION OF A PARKER TUBE COUPLING made without thread compound or other makeshift. They can be made by unexperienced labor and under unfavorable conditions. For underground service this company has developed a high copper alloy of very low zinc content and high nickel content which offers resistance to electrolysis or other destructive action. According to the manufacturers, copper tube is equally as resistant to corrosion as lead pipe, and of far greater mechanical strength. It can readily be fabricated without complicated equipment, tooling, or facilities. The greater tensile strength of copper tube assures a more secure installation, and the service pipe may be safely installed where a sewer or other excavation crosses the line of the service pipe. Copper tube will withstand the strains of settling ground with greater security than lead, iron or steel pipe. The service pipe fittings of this company are manufactured for tube of slightly greater internal diameters than standard iron pipe and in accord PORTABLE OIL BURNER FOR DRYING OUT STREET BEFORE PATCHING Birmingham Office of Hunt Company The Robert W. Hunt Co., engineers, 2200 Insurance Exchange, Chicago, Ill., have announced the new location of their Birmingham office in the Bankers Bond Building, Birmingham, Ala. OF STE STIIVIE OF CONSTRUCTION CAISC FOUNDED 192 $30,000,000 SAVED! THE American Institute of Steel Construction has already contributed to modernizing the building codes of more than a hundred cities in this country and Canada. This has meant an estimated saving to builders, owners and taxpayers of more than $30,000,000 annually. The Institute enlisted the aid of America's ablest engineering talent in developing its Standard Specification for the design, fabrication and erection of structural steel for building This Specification is endorsed by such bodies as the A. S. C. E., the New York Building Congress, and the Pacific Coast Building Officials Conference. It supplements a Code of Standard Practice designed to obviate misunderstandings between the buyer and seller of structural steel. Send for copies of the Standard Specification and Code of Practice. There is no obligation. We will also send the valuable fact-book, "STEEL NEVER FAILS.' AMERICAN INSTITUTE OF STEEL CONSTRUCTION, Inc. The cooperative non-profit service organization of the structural steel industry of the United Steel S 81-A Do you mention THE AMERICAN CITY when writing? Please do. Security ZINC-SPRAYING AN 8-INCH PIPE LINE BY THE METALAYER PROCESS TO PROTECT IT FROM CORROSION Protecting Pipes and Structures with a Metal Spray Metal spraying to prevent corrosion is facilitated and made available to nearly every branch of industrial work by the use of the MetaLayeR by the Witt-Humphrey Steel Co., Greensburg, Pa. With this tool, molten metal coatings of any commercial metal can be applied on any base such as cast iron, steel, wood, stone, leather, glass, concrete, paper and fabrics of all kinds. This metal spraying is of special value to city officials and engineers for preventing corrosion of city service pipes and mains, bridge work, construction equipment, tanks, canal lock-gates, and every other place where corrosion will cause deterioration in time. The MetaLayeR or "Putting-on Tool" consists of an oxy-acetylene burner combined with a small turbine driven by compressed air at 50 pounds pressure. This turbine feeds metal wire automatically and continuously from a reel into the muzzle of the burner. Here the wire enters into the reducing flame zone developed from the gases. It is there melted, atomized and blown in a fine molten spray onto the surface to be coated, at a velocity of about 3,000 feet per second. The parts to be sprayed are first sand-blasted or grit-blasted to obtain a clean, open grained surface. The sprayed coatings adhere to their base tenaciously, and the temperature of the surface being coated is raised but slightly. The metal-sprayed surface can be turned, ground, milled, filed, polished, hammered or bent. The muzzle of the sprayer is aimed at the surface to be coated, being held three or four inches from it. A single-pass spraying deposits a coating about 0.002 inches in thickness, and four or five passes will generally suffice to produce a substantial and impervious coating, just as effective as a greater thickness. The tool is easily operated and its total weight is only 31⁄2 pounds. No pigments, vehicles, solvents or fluxes are used in this process, but pure metal wire is melted, atomized, impacted, instantly cooled and transformed into a sheet metal covering upon the surface being sprayed. The spraying can be done either in the shop or in the field, and before, during, or after fabrication. The interior of pipes, cylinders or vessels having small orifices can be metal-lined with this process by the use of a special patented revolving spraying tool which makes it possible to spray the inside of pipes as small as 2 inches in diameter and up to 20 feet in length. Zinc, lead, tin, aluminum, copper, brass, bronze, iron and steel, nickel, stainless steel and many other metals can be applied successfully and easily by this tool. The spraying of small parts or articles weighing from a fraction of an ounce up to 10 pounds is done in a specially constructed mass coating machine, containing a rumbling barrel into which metal is sprayed on the surfaces of the entire charge at one operation. Threaded parts are metal-coated or lined uniformly and they do not require re-threading. |