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2. Pull switch - Wikipedia

   en.wikipedia.org/wiki/Pull_switch

   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). Mounted inside a pull switch, there ...

3. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   An example of a British corded pull switch. A light switch combined with a light socket is sometimes installed in basement or utility areas of homes. The switch is operated by a pull chain or cord. It is also possible to have the cord-operated switch separate from the light socket, which is particularly common in British bathrooms.

4. 3-way lamp - Wikipedia

   en.wikipedia.org/wiki/3-way_lamp

   A 3-way lamp, also known as a tri-light, is a lamp that uses a 3-way light bulb to produce three levels of light in a low-medium-high configuration. A 3-way lamp requires a 3-way bulb and socket, and a 3-way switch. In 3-way incandescent light bulbs, each of the filaments operates at full voltage. Lamp bulbs with dual carbon filaments were ...

5. Pullstring - Wikipedia

   en.wikipedia.org/wiki/Pullstring

   Pullstring. Japanese spinning tops with pullstrings. A pullstring (pull string, pull-string), pullcord (pull cord, pull-cord), or pullchain (pull-chain, pull chain) is a string, cord, or chain wound on a spring -loaded spindle that engages a mechanism when it is pulled. It is most commonly used in toys and motorized equipment.

6. Chain - Wikipedia

   en.wikipedia.org/wiki/Chain

   Ball chain pull switch for a ceiling light. Anchor cable, as used by ships and boats; in British nautical usage the component is a cable, the material is chain; Chain slings; Chain hoist, device used for lifting or lowering a load; Chain boat, a type of river craft that used a steel chain laid along the riverbed for its propulsion

7. Harvey Hubbell - Wikipedia

   en.wikipedia.org/wiki/Harvey_Hubbell

   Scientific career. Fields. Electrical engineering. Institutions. Harvey Hubbell, Incorporated. Harvey Hubbell II (born 1857, Connecticut) was an American inventor, entrepreneur, and industrialist. His best-known inventions are the U.S. electrical plug [1] and the pull-chain light socket. [2]