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Period: to
Elisha Graves Otis
Who-Elisha Graves Otis
What-Mechanic and engineer
Where-New York
When- August 3rd 1811- April 8th 1861
Why- He was operating a new factory and working to upgrade and improve its machinery.
How- Used a ratchet on a spring so it could catch the elevator if it were to drop. https://en.wikipedia.org
http://enchantedlearning.com/inventors/indexs.shtml -
Period: to
James Ritty (https://en.wikipedia.org)
Who-James Ritty
What-Tavern keeper
When-October 29th 1836- March 29th 1918
Where-Dayton, Ohio
Why-Took a break from being a tavern owner because he was robbed, while on a ship for Europe, saw invention that counted how many times the propeller spun, convinced he could make a machine that can keep track of sales, headed back to US
How- After several failed prototypes their third design operated by each key having its own amount of money when pressed, no cash drawer.
http://enchantedlearning.com -
Typewriter
Who- Christopher Latham Sholes
What-Typewriter
When- November 13th 1867
Where- New York Why- Out of others 52 design attempts he wanted to make the one that worked. How- He used many sketches and previous mistakes to correct errors and make a completely new design. http://enchantedlearning.com/inventors/indexs.shtml https://en.wikipedia.org https://www.google.com/search?q=original+typewriter&rlz=1CAS -
Zipper
Who- Whitcomb L. Judson
What- Zipper
Where- Chicago Illinois
When- August 29 1893 Why- He wanted to expand his patent line from railroads to other inventions (zipper) How- Got rejected many times and had to repeat a few designs, started with basic sketches.
