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1952 Theatre Catalog, 10th Edition, Page 167 (133)

1952 Theatre Catalog, 10th Edition
1952 Theatre Catalog
1952 Theatre Catalog, 10th Edition, Page 167
Page 167

1952 Theatre Catalog, 10th Edition, Page 167

THESE decoratively etched all-glass doors are a striking feature of the Paramount, Rochester. N. Y.

Patterned Glass and Mirrors

Then there is patterned glass, delicately tinted, which is used where both privacy and light transmission are desired. This comes in many attractive patterns and is most useful for ofiice partitions, corridors and windows where vision is neither important nor needed. And, of course, there is mirror glass, the one product that has been most familiar to the theatreman down through the years with its peculiar ability to enlarge the apparent size of areas such as lounges and lobbies. Artistic etching has expanded the value of mirror glass Well beyond the utilitarian factor so that today mirrors offer much greater possibilities for theatre use than heretofore.

Double Glazed Windows

In addition to these possibly better known products of glass, there is the double-glazed unit for special, largearea window applications which are usually not a part of theatre construction but which should be discussed to complete the glass picture.

Double Glazed Thermal Value

This product greatly minimizes the insulation problem where large glass areas are required. The unit consists of two plates of glass with a space of dehydrated air sealed permanently in betwven by a metal-to-glass bond. The result is a glass unit which has nearly the same insulating efficiency as a brick wall eight inches thick or a concrete Wall 12 inches thick. Letls compare the exact figures betWeen a double glazed glass unit one inch thick (two pieces 9f quarter-inch plate glass with one-half inch air space), and the brick and ('01P Crete walls of thicknesses mentioned above:


Let coefficient U stand for the number of BTUls fiowing through one square foot of a material in an hour, per degree of temperature difference between the warm and cold sides. The U value for one-inch double glazed glass is .58, for an eightdnch brick wall .50, and for 12 inches of concrete .57.

Thus it can be seen that this product is a very fine solution to the problem of heat loss or gain through large window areas. When you add in the other important advantages of glass over an opaque construction material, advantages such as transparency, low construction and upkeep costs, the popularity of

glass as a construction medium is easily explained.

During hot weather, the insulating glass will cut the flow of convected and conducted summer heat by approximately 42 per cent. This means lower operating costs for the air conditioning unit and, in many cases, also means that a smaller air conditioning unit will be able to handle a job that formerly required more expensive equipment.

Double-paned insulating glass has other important advantages over singleglazing. It greatly reduces frosting and condensation on the windows because the temperature of the inside pane of glass is more nearly that of the building interior. It reduces downdrafts so often found near large areas of single glazing. Last but not least, it reduces the transmission of sound over that of single glass windows.

Most of these qualities are important to the theatre owner because they mean better appearance, greater economy of operation and more profitable display. However, the theatre has problems peculiar to its own type of business and it might be said that the general type of theatre layout does not lend itself to large glass areas as does, say a drug store or ofiice building. The very nature of a theatre demands that three sides

. of the building be more or less window less, the light inside the structure being largely artificial. Furthermore the open side, the front, is usuallly composed of booth and display areas. That type of arrangement does not lend itself readily to the use of insulating glass. However, it is a product to remember when designing windows and theatre fronts since there are almost always some glass areas that should be double-glazed.

LARGE PLATE GLASS MIRRORS on the vestibule walls enhance the apparent size of the interior as seen thru two banks of tempered glass doors in the entrance of Loew's Valentine, Toledo.
1952 Theatre Catalog, 10th Edition, Page 167