Door handle - online puzzles

A door handle is an attached object or mechanism used to manually open or close a door. In the United States, a door handle generally refers to any fixed or lever-operated door latch device. The term door knob or doorknob tends to refer to round operating mechanisms. Home-entry door handles are usually more sophisticated than bedroom door handles. The handles may or may not be attached to a plate and basically provide grip to open or close a door.

There is a subtle difference between a knob and a door handle. Though these terms are sometimes used interchangeably, but a knob is generally rotated in circular clock -wise or anti-clockwise motion while a handle moves up and down in the vertical direction. Some handles, also known as pull handles, are fixed and do not have any moving mechanism.

Description

The traditional door knob has a bolt or spindle running through it that sits just above a cylinder, to which the spindle is connected. Turning the knob pulls the cylinder in the direction of the turn.