Today in History – February 1, 1972 – First scientific hand-held calculator, the HP-35, introduced for $395. I was an undergraduate in engineering when the HP-35 was released. I couldn’t afford to buy one and stuck with my slide rule. But the next year, I gave in and bought the next model, the HP-45 and [...]

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Today in History – December 22, 1885 – LaMarcus Thompson patents first Gravity Switchback Railway roller coaster. It was built at Coney Island and became the precursor to the modern roller coaster. At the top of one platform, riders climbed into cars and then rode them down a 600 foot track and up to another [...]

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Today in History – December 13, 1928 – Today is Clip-on Tie Day. That’s right, on this day, 79 years ago, someone (and I couldn’t find out who) invented the clip-on tie. This fine fashion accessory often gets a bad wrap. People belittle it as the tie for people that don’t know how to tie [...]

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Today in History – November 21, 1877 – Edison announces the invention of his “talking machine”, the phonograph. Also on this date in 1995, Disney releases “Toy Story”, the first full-length movie created entirely by computer animation. Thomas Alva Edison, nicknamed the “Wizard of Menlo Park”, had 1,093 patents to his name. Some of Edison’s [...]

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Today in History – “ November 18, 1963 – “Bell Telephone introduces push button telephone, eventually to replace the rotary dial telephone that had dominated the market since its invention in 1891 when Almon Strowger patented the twin inventions of the automatic telephone exchange and the pulse-driven telephone in the home. Although early prototypes had [...]

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