Victoria McCoy - Hair Dryers

3,015 views

Published on

PowerPoint Presentation by Victoria McCoy on the history, development and modifications of hair dryers for Introduction to Engineering class (Kenton Ridge High School)

Published in: Education, Lifestyle, Business
0 Comments
3 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
3,015
On SlideShare
0
From Embeds
0
Number of Embeds
10
Actions
Shares
0
Downloads
93
Comments
0
Likes
3
Embeds 0
No embeds

No notes for slide

Victoria McCoy - Hair Dryers

  1. 1. Hair dryers<br />By: Victoria McCoy<br />
  2. 2. History of hair dryers<br /><ul><li> Alexander Godefoy inventor
  3. 3. invented in 1890
  4. 4. 1st hair dryer - vacuum
  5. 5. 1st true hair dryer - 1920
  6. 6. extremely large, heavy, and frequently overheated</li></li></ul><li>History of hair dryers<br /><ul><li> Early models – large
  7. 7. madeof nickel, chrome-plated steel, or polished aluminum
  8. 8. had a wooden handle
  9. 9. Heavy, hard to use</li></ul>One of the 1st hair dryers<br />
  10. 10. History of hair dryers<br />1951 the first really workable dryer became available to the general public.<br />Was a hand-held dryer connected to a pink plastic bonnet<br />
  11. 11. History of hair dryers<br />1st handheld hairdryer – 1925<br />produced 100 watts of heat and could not dry hair quickly<br /> weighed over 2 lb because it was made of heavy steel and zinc<br />next 20 years engineers improved the design and tripled the heat to 300 watts<br />1960s - hairdryers produced up to 500 watts<br /> 1990s - portable hairdryers produced over 1500 watts<br />Modern hairdryers produce up 2000 watts of heat<br />
  12. 12. Today’s hair dryers<br /><ul><li>hairdryers today haven’t changed much from the original design
  13. 13. now has better materials
  14. 14. now more appealing to the eye, come in different sizes shapes and colors.</li></ul>Today’s hair dryer<br />
  15. 15. Today’s hair dryers<br />improved the safety and increased its power over 20 times the original design<br />unlikely future dryers will be made much more powerful<br />already produce close to estimated maximum amount of heat without danger of burning hair or skin<br />probably improve dryers to run more quietly or be easier to hold and operate<br />mostmanufacturers are focusing on improving the appearance of their products<br />
  16. 16. How does a hair dryer work?<br />A hair dryer needs only two parts to generate the blast of hot air that dries your hair:<br /><ul><li>a simple motor-driven fan
  17. 17. a heating coil </li></ul>1. Plug in, turn on -&gt; current<br />2. Power -&gt; heating element (hot) <br />3. Small electric motor -&gt; fan<br />4. Airflow -&gt; heating element. <br />5. Air heats up (convection)<br />6. Hot air -&gt; end of barrel<br />
  18. 18. My modification<br />hairdryer inside of a hairbrush<br />cordless<br />plug in charger<br />heat resistant<br />water resistant<br />different colors<br />energy efficient<br />
  19. 19. My modification<br />

×