Transcript of Inventions of the 1920s
Major Inventions of the 1920s Automobiles Band-Aids Invented by Earle Dickson in 1921. They were made for his wife originally, but his boss saw the invention and wanted to manufacture them. Bandages at the time were rolls of adhesive tape covered in sterile gauze that the user would cut to size. The importance of the Band-Aid is that without them, cleaning up minor wounds would be a major task. Bellis, Mary. About.com, "History of the Band-Aid - Earle Dickson Inventor of the Band-Aid." Last modified 2013. Accessed February 25, 2013. http://inventors.about.com/od/bstartinventions/a/bandaid.htm. St. Joseph Catholic School, "box2.jpg 182x266 pixels." Last modified 2013. Accessed February 25, 2013. http://sjmv.org/Campus/Class/scinventors/bandaid/box2.jpg. Rockets Traffic Lights Lie Detector Radio Thank you for visiting our museum exhibit The radio was a huge impact based on the fact that people in the Roaring Twenties were all about the music, news, and many other things that went about. Not only that, broadcasting became more influential to well-known people such President Harding, who was the first president who had his voice transmitted by radio while addressing his crowd to memorial. Thanks for the improvements of this advanced technology, people can listen from wherever they are. Due to the constant increase in automobiles in 1920, police officer William L. Potts of Detroit, Michigan, determined to find a way to keep people safe on the streets. He did so with his invention of the first electric traffic light. Potts used red, amber, and green railroad lights and about thirty-seven dollars worth of wire and electrical controls to make the world’s first 4-way, three color traffic light. It was installed on the corner of Woodward and Michigan Avenues in Detroit, in 1920. Potts’ design did not require any audio signals, so that wind, horns or other city noises would not interfere with the message being conveyed by the traffic control device. Another advantage of the electric traffic light was that it could transmit four messages to oncoming traffic at the same time, instead of the two police could. Although there were many theories and developments of different forms of rockets, Robert H. Goddard was the first man to invent the liquid-fueled rocket in Auburn Massachusetts. Because of his great inspiration that no one really approved of, this creation of this rocket was able to improve more developments that would eventually launch people to the moon in the 1960's. With ambition, he continued his work until his death in 1945. Although the Model T wasn't the first vehicle ever made, Henry Ford brought the idea of mass production along with it around the 1920's. This automobile had a combustible engine and its way of production had an enormous influence in all of the lives across America. Mass production allowed Henry Ford's company to build massive amount these vehicles and lower the cost of them too. This vehicle and mass production changed the face of America and the lives of all her people. The lie detector, otherwise known as the polygraph was invented in 1921 by a student from Harvard, William M. Marston. However, in 1895 Cesaer Lombroso had the original idea of a lie detector. The polygraph works by measuring the heart rate and respiration rate of people while they are asked about various things. If your heart rate or rate of respiration starts to go up then that was said to be a lie. This was very influential to not only influential to our time but also theirs. It showed who was telling the truth, and who wasn’t. It influenced many inventions in the police force after its arrival. Even though it isn't considered reliable anymore, the lie detector ultimately led to many other discoveries. Justin Jones Taylor Novak Layne Roth Ada Fung Hannah Lillard “Harding becomes first president to be heard on the radio,” The History Channel website, last accessed Feb.27, 2013, http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio. “First liquid-fueled rocket,” The History Channel website, last accessed Feb. 27, 2013, http://www.history.com/this-day-in-history/first-liquid-fueled-rocket . Gutman, . "Video didn’t kill the radio star…bandwidth did!" (blog), Febuary 05, 2010. http://www.valleyprblog.com/media/video-didnt-kill-the-radio-star-bandwidth-did/ (accessed February 27, 2013). Allstar Network, "Rocktery." Last modified March 12, 2004. Accessed February.27,2013. http://www.allstar.fiu.edu/aero/rock2.htm Fabre, Maurice. A History of Land Transportation. Canada: Hawthorn Books, 1963. http://books.google.com/books/about/A_history_of_land_transportation.html?id=DOQ3AAAAIAAJ (accessed February 27, 2013). Sicker, Ted. "The Twenties." "The Tensions of Prosperity.". Performed © 2000 WGBH Educational Foundation.. A Biography of America. © 1997-2002 Annenberg Media. . Web, http://www.learner.org/biographyofamerica/prog20/transcript/index.html. Flink, James. The MIT Press, "The Invention of the Modern Automobile." Accessed February 28, 2013. http://campus.udayton.edu/~hume/Automobile/auto.htm. lalalalalalalalalalalalalala!!! I did it!!! Phil Ament. Vaunt Design Group, "Traffic Light." Last modified November 13, 2006. Accessed February 27, 2013. http://www.ideafinder.com/history/inventions/trafficlight.htm.Full transcript
Laura Melendy. Technology Transfer Program, "From Waving Arms to LED’s: A Brief History of Traffic Signals." Last modified 2013. Accessed February 27, 2013. http://www.techtransfer.berkeley.edu/contact/
Michael Bierut et al. Design Observer, "Red Light, Green Light: The Invention of the Traffic Signal." Last modified 2013. Accessed February 27, 2013. http://observatory.designobserver.com/entry.html?entry=8627.
Mark Traffic, "Traffic Lights Invented by William L. Potts." Last modified Saturday, October 16th, 2010. Accessed February 27, 2013. http://www.marktraffic.com/traffic-lights-invented-by-william-l-potts.php. This is huge... Uh-huh... keep the people safe! You Liar!! "lie detector." The Columbia Encyclopedia, 6th ed.. 2012. Encyclopedia.com. (February 28, 2013). http://www.encyclopedia.com/doc/1E1-liedetec.html
Clark, Josh. A Discovery Company, "LIKE THIS HowStuffWorks Ebooks On Sale Now! Was It a Flop or a Hit? Videos: Stuff They Don't Want You to Know Can an MRI machine also act as a lie detector?." Last modified 2013. Accessed February 28, 2013. http://people.howstuffworks.com/mri-lie-detector.htm. gr