In colonial times the first door hardware was made out of wood and simply included latches and strings. Round knobs were first used around the time of independence. Decorative hardware including knobs, emerged after the Centennial Exposition of 1876. Before this time, most door hardware was imported. In 1938 about 95% was imported. Glass knobs [...]
Brass is known to humans since prehistoric times, much before zinc itself was discovered. Previously, it was produced by melting copper with calamine, a zinc ore. Brass is a yellowish alloy of copper and zinc in which small amounts of other metals are also present. Usually 67% copper and 33% zinc is present in brass. [...]
Have you ever thought when you are away, what is the best conventional way to ensure safety of you home? Yes you are right its security door locks which you installed at you home. Usually front doors are considered most important, even though all the entrances like windows and other exterior doors should be considered [...]
A satin nickel finish is a nickel plating having a non-reflective texture. Finish can be produced by mechanical means such as shot peening and chemical means. Chemical means involve changing the nickel plating bath with very small particles (micron size). Chemical approach is being most widely used. These days most satin nickel plating is done [...]
During the colonial times first door hardware was made out of wood and involved simple latches and strings. Decorative hardware including door knob, appeared after the Centennial Exposition of 1876. Americans first manufactured door knobs. Working of doorknobs is based on a simple mechanism consisting of screw-style axle (called a spindle) that has at least [...]