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2. Automotive lighting - Wikipedia

   en.wikipedia.org/wiki/Automotive_lighting

   Modern cars now use a relaxation oscillator and solid-state relay built into the body control module to flash the lights, and use speakers to produce the distinctive clicking sound associated with turn signals, [53] which was previously made by a relay or the leaf spring in a thermal flasher. If the stalk switch is not moved beyond the fixed ...

3. Relay - Wikipedia

   en.wikipedia.org/wiki/Relay

   A relay Electromechanical relay principle Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style miniature relay with the dust cover taken off. A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple ...

4. Thermal cutoff - Wikipedia

   en.wikipedia.org/wiki/Thermal_cutoff

   A thermal fuse is used when the overheating is a result of a rare occurrence, such as failure requiring repair (which would also replace the fuse) or replacement at the end of service life. [ 1 ] One mechanism is a small meltable pellet that holds down a spring.

5. Wigwag (railroad) - Wikipedia

   en.wikipedia.org/wiki/Wigwag_(railroad)

   Production of new signals continued until 1949, and replacement parts until 1960. The symbol of a black cross on a white background was adopted in the US as the traffic sign warning drivers about an unprotected grade crossing and was incorporated into the corporate logo of the Santa Fe Railroad. It remains in use today, although with a yellow ...

6. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

7. AC power plugs and sockets: British and related types

   en.wikipedia.org/wiki/AC_power_plugs_and_sockets:...

   This requirement for a new system of plugs and sockets led to the publishing in 1947 of "British Standard 1363:1947 Fused-Plugs and Shuttered Socket-Outlets". [43] One of the other recommendations in the report was the introduction of the final ring circuit system (often informally called a "ring main"). In this arrangement a cable connected to ...