Original vintage hardware catalog for GRAND RAPIDS HARDWARE COMPANY. Ven-Trol-Gear, Ven-Trol-Hinge for outward projecting panel and casement vents, panel, hopper, sash, and all types of double-hung windows. Special features, specs given, illustrations. Specially designed to provide the most efficient and easiest opening mechanism for modern residential, monumental and commercial buildings. Cam latch no. 5021 and hopper vent lock LM-28-H also shown. Saw tooth drive-type pulleys with cone bearings, superior dual sash balance, levelseal lock and lift are discussed on back page. Main office was located in Grand Rapids, MI. This unique old four page 1956 architect specifications brochure would make a marvelous addition to your engineering library. Pages are loose and contain a small amount of residual glue on edge.
- SKU zg798
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