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A pull switch, also known as pull-cord switch, or light pull, or pull chain is a 
An electric pull switch is attached to a toggle type switch: one pull to switch on and next pull to switch off. It was invented by Harvey Hubbell, who was granted its patent in 1896.
The most common use of a pull switch is to operate a ceiling electric light. The
Fan Pulls
{{Switches Switches
switch
In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. The most common type ...
that is actuated by means of a chain
A chain is a wikt:series#Noun, serial assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression (physics), compression but line (g ...
or string
String or strings may refer to:
*String (structure), a long flexible structure made from threads twisted together, which is used to tie, bind, or hang other objects
Arts, entertainment, and media Films
* ''Strings'' (1991 film), a Canadian anim ...
.
An electric pull switch is attached to a toggle type switch: one pull to switch on and next pull to switch off. It was invented by Harvey Hubbell, who was granted its patent in 1896.
The most common use of a pull switch is to operate a ceiling electric light. The ceiling fan
A ceiling fan is a fan mounted on the ceiling of a room or space, usually electrically powered, that uses hub-mounted rotating blades to circulate air. They cool people effectively by increasing air speed. Fans do not reduce air temperatur ...
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).
Mounted inside a pull switch, there could be two types of two-position toggle switches. (In both cases the stable physical open- or closed -situation would be switch in outer and string in upper position.) One type would switch to closed (alternatively open) already during the initial pull in the string. The other type would switch to closed (or open) only when releasing ''after'' a full pull. With the first type, the weight of the string and handle could accidentally switch the load intermittently on and off, when still around the initial position (depending on the internal spring). This could potentially increase the danger of overheating in the switch.
In a damp environment, electrical pull switches have a safety advantage because the user is separated from the electricity by a significant distance if the lead is made of an electrically insulating material, such as cotton string.
Most commercially available pull switches use a short length of ball chain, which may then be connected to any number of optional leads for added length or decoration. Leads for decoration or utility are usually made of metal or plastic. They can come in many different shapes ranging from animals, geometric shapes, or look just like a weight.
See also
*Light switch
In electrical wiring, a light switch is a switch most commonly used to operate electric lights, permanently connected equipment, or electrical outlets. Portable lamps such as table lamps may have a light switch mounted on the socket, base, or ...
References
External links
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