> > > >

1945 Theatre Catalog, 4th Edition, Page 155 (133)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 155
Page 155

1945 Theatre Catalog, 4th Edition, Page 155

lead-Coated Copper

Lead-coated copper is more important in decoration. It is used to a considerable extent for sheet-metal workeroofing, rain-water-conducting forms, cornices, spandrels, and other eEects. It is very ductile, easily formed, and stamped, combining the strength and corrosion resistance of copper with the appearance and permanence of lead. This gives the metallic gray appearance of smooth lead to a dark, antique gray where a rough lead coating is used, both types weathering like lead. A sheet of annealed copper (16 ounces to the square foot) coated with 0.2 or 0.5 ounces of lead on one side is typical of the lightly-coated sheets, but lead coatings on both sides and as heavy as 5 ounces are used. The c0pper may be hard-tempered,

The Brasses

The brasses combine excellent workability with economy and fair corrosion resistance. These are, consequently, much used for decorative hardware, as door and window fittings, as well as for water piping. Muntz metal (60-40 brass) is well adapted for extrusion and stamping. Yellow brass is readily drawn. Extruded and drawn sections are available in a wide range of shapes used for molding, door frames, transom bars, window frames and supports, cornices, flutings, and similar sections. These drawn sections have a natural bright finish, but the extruded ones possess a satiny or matte surface.

If brasses are not polished frequently to retain the original colors, a gray, brown, or black patina is gradually formed. Artificial patinas can be produced and used for pleasing decorative effects. Combinations such as patinas, or of the original colors (varying with the composition from a copper red through various shades of yellow to a straw or nearly white color), can be made to give striking effects. Lacquer as used in the past preserves the original colors

RADIO CITY MUSIC HALL, in New York, probably has utilized more copper, brass, and bronze than any other theatre in the world. At the left, like a graceful curve of a cellols bow, is the balcony with its brass decorations overlooking the grand foyer. At the right is the elaborate stage control board, containing in its elecr


only temporarily, but some of the new lacquers developed recently give promise of reasonably good protection for both indoor and outdoor exposure.


Bronze, strictly speaking, is an alloy of copper and tin, but this term now includes copper-base alloys in which zinc, silicon, aluminum, or manganese replaces part or all of the tin. The form of bronze most used for decoration has been castings, since a tin bronze makes an excellent sharp casting which is always much valued for statuary, plaques, and inscriptions. Bronze, brass, and copper spandrels for ornamental work are common, as well as fronts, entrances, and balustrades. .

Nickel Silver

Nickel silvereknown also as German silver, Benedict nickel, and Hwhite metalii-is really an alloy containing more copper than nickeleand no silver! Actual composition varies with the method of fabrication and the proposed use.

Mechanically, the nickel silvers are excellent for structural members as well as decoration. They may be cast, forged, and fabricated by all the usual methods of forming, giving a wealth of structural forms and shapes from which to construct decorative grilles, window guards, hardware, trimmings, and castings of all sorts. These properties, combined with pleasing color and fair resistance to weathering make the nickel silvers the most-used, nickel-containing, non-ferrous alloy for exterior decoration. As a class, the nickel silvers attain a brown or green patina on weathering, unless kept polished. The speed of patina formation is accelerated by seashore conditions and by industrial atmospheres.

Aside from the usual white nickel silvers, it is possible to produce castings

BEAUTY AND UTlLlTY are well combined in architectural bronze, as exemplmed by this whole doorway to the Tri-State Telephone and Telegraph Company Building. (American Brass Company photograph.)

having moderate coloration by keeping the zinc and nickel contents comparatively low. Thus, light pink, yellow, green, or blue can be made and used effectively.

Applications of the nickel silvers in decoration are many, being most frequently found in interiors or in semi-sheltered places. Of particular importance are the applications at entrances and windows of office buildings, shops, and theatres.

Despite the inroads of stainless steel, the brasses and bronzes are still in demand, and will continue to be. Aluminum has already cut into the use of copper in the electrical industry, particularly in transmission lines, but because of its current-carrying capacity, copper is almost mandatory for use in motors, generators, and other important items.

trical mechanisms or large tonnage of copper and brass. The coppervleat ceiling of the grand lounge is also an etiective utilization of the metal, according to the management of the Music Hall and the Copper and Brass Research Association, through whose courtesy and cooperation these photographs have been used here.

1945 Theatre Catalog, 4th Edition, Page 155