Pull switch
A pull switch is a switch that is actuated by means of a chain or string.
An electric pull switch is attached to a toggle type switch: one pull to switch on and next pull to switch off.
The most common use of a pull switch is to operate a ceiling electric light. The ceiling fan and mechanical wall fans are also appliances often operated by pull switches. Pull switches may be either two-position (open or closed) or multi-position (allowing for different fan speeds or levels of illumination).