The earliest door knobs were made from a variety of materials and not all of them functioned with just a simple turn.
Glass door start year.
The history of these beautiful bits of our past begins with the technological advances of the early 1800s.
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The use of glass knobs continued through the 40s but by the 50s tastes in both architecture and hardware had changed and americans began favoring cleaner modern lines in metals.
Early colonial homes typically had doors a mere 1 4 inch thick from 1830 to 1873 more than 100 u s.
Glass doorknobs are still being manufactured but the look and feel of the glass is distinctly different than the antique and vintage versions.
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Before long developers were outfitting doors in suburban ranch houses with utilitarian looking steel orbs.
The old glass knobs look watery when compared with today s crystal clear reproductions.
Modern patio doors feature energy efficient frames and glass and most provide multipoint locking systems for better security.
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Patents were granted for door knobs.