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2. Laser engraving - Wikipedia

   en.wikipedia.org/wiki/Laser_engraving

   Laser engraving metal plates are manufactured with a finely polished metal, coated with an enamel paint made to be "burned off". At levels of 10 to 30 watts, excellent engravings are made as the enamel is removed quite cleanly. Much laser engraving is sold as exposed brass or silver-coated steel lettering on a black or dark-enamelled background.

3. Chart recorder - Wikipedia

   en.wikipedia.org/wiki/Chart_recorder

   If the pen is continuously pressed against the paper, the galvanometer must be strong enough to move the pen against the friction of the paper. To lessen the strain on the galvanometer the pen might instead only intermittently be pressed against the writing medium, to make an impression, and then move while pressure is released. [citation needed]

4. Process of tattooing - Wikipedia

   en.wikipedia.org/wiki/Process_of_tattooing

   In 1891 the first electric tattoo needle was patented in New York City by Samuel O'Reilly, who modified Thomas Edison's electric engraving pen. [3] O'Reilly's machine was based on the rotary technology of the electric engraving device invented by Thomas Edison. [4] Modern tattoo machines use electromagnetic coils.

5. Electric pen - Wikipedia

   en.wikipedia.org/wiki/Electric_pen

   The electric pen was the key component of a complete duplicating system, which included the pen, a cast-iron holder with a wooden insert, a wet cell battery on a cast-iron stand, and a cast-iron flatbed duplicating press with an ink roller.

6. Power tool - Wikipedia

   en.wikipedia.org/wiki/Power_tool

   The cast metal housings were heavy, contributing to repetitive use injuries, as well as conductive - often shocking the user. As Henry Ford adapted to the manufacturing needs of World War II, he requested that A. H. Peterson, a tool manufacturer, create a lighter electric drill that was more portable for his assembly line workers. [19]

7. College Football Playoff rankings: Projected 12-team bracket ...

   www.aol.com/college-football-playoff-rankings...

   2024 CFP schedule. All times Eastern. First Round: Game 1: Friday, December 20 at 8 p.m. | ABC, ESPN Game 2: Saturday, December 21 at 12 p.m. | TNT Sports Game 3 ...