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Air System Equipment Registers Grilles Waterloo Register Company Waterloo, Iowa Seattle, Wash. Incorporated 1902 Representatives in Principal Cities Wire Mesh Grille especially designed for vessels, industrial plants, and Army barracks; Made of M in. square mesh heavy wire with rugged frame. FH-100 Forced Air Register for residen tial application. Simple operation, quick shut off. Easy to clean. Adjustable Wood Louvre Grille to re; place critical steel in` Defense Plant installa tions. Available in three styles. Wood louvres are spaced on 1 in. centers with, steel border and duct flange. Return Grille G-2 with close mesh fixed direct ional fins. Fins set on in. centers in deflec tion desired. Also avail able with vertical fins. Supply Grille E-l with both front and rear louvres stream lined and individually ad justable. % in. blade spacing. Zeph-O-Cone Marine Air Diffuser diffuses high entrance velocities rapidly and quietly. Sizes for 100, 150, 200 and 300 cfm at 2000 fpm inlet velocity. Techni-trol Air Vol- ume Damper all louvres operate by linkage arrangement to reduce air volume with out changing direction. Lever or key controls. Techni-Louvre Air Control Device provides uniform dis tribution of air for entire out let. Each vane is composed of two separate leaves in dependently adjustable. Dull Black finish. Blackout Louvre is lightproof, sightproof, and weatherproof. Allows maximum passage of air while preventing escape of light rays. A convenient inside handle provides easy adjust ment. It is made of steel, bonderized, and painted dull black. Available for vessels and industrial application. Marine Supply Register with multi-louvre damper and ring loop for pole operation. Extra screwholes provided for stronger attachment needed on vessels. Friction points made of non-fer rous materials. All products made of steel receive Parker " Bonderizing" process prior to painting. Engineering Data for horizontal diffusion of cool air is available for selection of proper velocities, number and size of outlets. 990 Air System Equipment Sheet Metal and Tubular Products The American Rolling Mill Company Executive Offices, Middletown, Ohio Atlanta, Ga. 1437 Citizens & Southern Natl. Bank Bldg. Berkeley. Calif..............Seventh and Parker Sts. Boston, Mass..............................201 Devonshire St. Buffalo, N. Y------ 504 Seventeen Court St. Bldg. Chattanooga. Tenn., 712 Chattanooga Bank Bldg. Chicago, Iu---------------------- 310 S. Michigan Bldg. Cincinnati, Ohio----- 24 Cooper Bldg., Hyde Park Cleveland, Ohio_________1516 B. F. Keith Bldg. Columbus, Ohio__ ___ ___ _____ 1020 Atlas Bldg. Dallas. Texas...... ............. .... 1111 Santa Fe Bldg. Dayton, Ohio........--...... 506 Mutual Home Bldg. Des Moines, IowA....Room 703 Old Colony Bldg. Detroit, Mich... ........ 5-261 General Motors Bldg. Houston, TexasP. O. Box 2303 Indianapolis, Ind......... 1106 Fletcher Trust Bldg. Kansas City, Mo............... ..... .... 7100 Roberta St. Los Angeles. Calif,________ 329 Petroleum Rirfg. Milwaukee, Wis., 627 First Wisconsin National Bank Bldg. Minneapolis, Minn171-27th Ave., S. EL New York, N. Y.120 Broadway Philadelphia, Pa____ 1808 Lincoln-Liberty Bldg. Pittsburgh, Pa__________ ____ 1627 Oliver Bldg. St. Louis, Mo.-----------------1725 Ambassador Bldg. Washington. D. C., 311 Defense Bldg., 1020-17th St., N. W. Choose the Correct Armco Grade These grades of Armco sheet metal are recommended for the air conditioning applications shown. For detailed information get in touch with the nearest district office or write direct to The American Rolling Mill Company, Middletown, Ohio. Armco Ingot Iron (Galvanized) Ducts Washer Chambers Plenum Chambers Steam Line Casings Furnace Casings Spray Towers Drip Pans Housings Machine Guards Unit Conditioners Roof Ventilators Eliminator Blades , Cold Rolled (Sheets and Strip) Furnace Casings Room Unit Casings Plates (ARMCO Ingot Iron) Smoke Stacks Coal Hoppers Breeching Unfired Pressure Vessels Low-fired Boilers Tanks Armco PAINTGRIP (Galvanized) A special mill-bonderized galvanized sheet that can, be painted without pre treatment. --Preserves life and beauty of paint. Hot Rolled (Sheets and Strip) Fan Blades Blower Casings Fuel Oil Tanks Unit Conditioners Stoker Hoppers Armco ZINCGRIP A special zinc-coated sheet, that can be severely formed without peeling or flaking of the tightly adherent zinc coating. Armco High Tensile A low alloy, high tensile steel possessing great strength. Used with proper design it results in weight reduction of frame work, tanks and similar items. Under, atmospheric service conditions it has four to six times the endurance of regular steel. Stainless Steel (Sheets, Strip and Plate) Combustion Chambers Heat Flues and Tubes Humidifier Pans Pre-heaters Furnace Parts and Supports Fan and Blower Blades Special grades have excellent resistance to destructive heat-scaling up to 2000 F. Other Armco Products The grades for these applications are only a few that Armco makes.' Others include copper-bearing sheets and plates and open-hearth steel, either galvanized or uncoated. 991