Original hardware trade vintage catalog for THE SHELBY SPRING HINGE COMPANY of Shelby, OH. Manufacturers of Checking Floor Hinges for Best Appearance, Long Life, Efficient Service. Used in Homes, Offices, Schools, Restaurants and Theaters. Threshold sections, operators, holders and stays. Double acting Gravity Hinge. Disbound from a large 1941 construction materials book, this unique old four page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro architectural design and engineering library. Pages are detached and contain a small amount of residual glue on edge.