With 112 million doors in the US, door knobs are an often used but rarely thought of product.
Every day millions of us open and close doors as we weave our way through our daily lives. Early doors were merely hides and textiles. It wasn’t until swinging “hinged” doors made first of wood and then of metals and glass did door knobs make their appearance. The first door knobs were made of wood and appeared in the late 1700s. About 100 years later in the1800s they were first manufactured and that happened to be here in the United States.
Door Knobs include four main parts. The knobs, typically round, are now often egg shaped like Baldwin Egg Knob, Schalge Sienna and Danbury, Kwikset Laurel, Weiser Carlisle and Emtek Hammered Egg knob.
Lever styles were designed for both their elegance and practicality as they are simpler to operate and are recommended for handicapped and elderly users. Popular lever designs are Schlage Accent and Flair, Baldwin Wave and Soho, Kwikset Commonwealth and Lido, as well as many others from Emtek, Grandeur, Omnia Weiser and Weslock. The spindle is the second main part and connects the knobs and levers through the door and transmits your hand twist to the latch. The latch incorporates the bolt that protrudes from the door edge and holds the door in the closed position. The fourth main part is the Rose or rosette, typically round in shape that covers the hole made in the face of the door to accommodate the whole apparatus and keep it looking “smart”.