The Pullman Manufacturing Company of Rochester, New York, promised drastic savings through the use of their unit sash balances in this 1920s brochure that can be found in the Drawings + Documents Archives' Trade Catalog Collection. The unit sash balances replaced the need for weights and cords in window construction, therefore eliminating the costs associated with heavy lead weights in the window frame.
It's worth mentioning that the Detroit Towers, built in 1922 and featured in this brochure, is still standing and is listed on the National Register of Historic Places. The brochure guarantees the product for the life of the building, so hopefully the windows at the Detroit Towers continue to enjoy "perfect window control".
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