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  2. Pre-ignition - Wikipedia

    en.wikipedia.org/wiki/Pre-ignition

    For reasons like these, a person not familiarized with the distinction might describe one by the name of the other. Given proper combustion chamber design, pre-ignition can generally be eliminated by proper spark plug selection, proper fuel/air mixture adjustment, and periodic cleaning of the combustion chambers. [4]

  3. Garage door opener - Wikipedia

    en.wikipedia.org/wiki/Garage_door_opener

    The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.

  4. Spark plug - Wikipedia

    en.wikipedia.org/wiki/Spark_plug

    Spark plug with single side electrode An electric spark on the spark plug. A spark plug (sometimes, in British English, a sparking plug, [1] and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within ...

  5. Ignition magneto - Wikipedia

    en.wikipedia.org/wiki/Ignition_magneto

    The first car to use magneto ignition was the 1901 German Mercedes 35 hp racing car, followed by various cars produced by Benz, Mors, Turcat-Mery, and Nesseldorf. [8] Ignition magnetos were soon used on most cars, for both low voltage systems (which used secondary coils to fire the spark plugs) and high voltage magnetos (which fired the spark ...

  6. Electric eye - Wikipedia

    en.wikipedia.org/wiki/Electric_eye

    Electric eye for a garage door opener. An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam.

  7. Investigators home in on hardware in probe of midair Alaska ...

    www.aol.com/news/united-finds-bolts-tightening...

    The door plug is held in place, in part, by 12 “stop pads” designed to prevent it from blowing outward, but in this case it appeared to slip upward and around the pads.

  8. Electric spark - Wikipedia

    en.wikipedia.org/wiki/Electric_spark

    A spark on a spark plug Lightning is a natural example of an electric spark. An electric spark is an abrupt electrical discharge that occurs when a sufficiently high electric field creates an ionized, electrically conductive channel through a normally-insulating medium, often air or other gases or gas mixtures.

  9. This Alaska Airlines Boeing lost its door plug in flight. The ...

    www.aol.com/alaska-airlines-boeing-lost-door...

    Abruptly after take off, a panel of the plane’s main body called the fuselage “plug door,” including a window, popped off and was sent flying into the air at 16,000 feet, a passenger told CNN.