Tag Archive: science and technology


Variator sep

Some people can get excited about science simply by watching an episode of Discovery’s How It’s Made But it often takes only one personal discovery, some object in motion, a curious force of nature, or unthinkable technological improvement, and suddenly a wider world opens up.  For me it was my dad making a simple telegraph machine, and later it was marveling on my first flight on an airplane, at last realizing visually how clouds cast shadows on the earth.  Today we’re featuring the final build in our trials of model maker UGEARS′ Stem Kit series of 3D engineering models (check out our other builds if you missed them: the 2-in-1 Arithmetic Kit (reviewed here), the Gearbox (reviewed here), the Random Generator (reviewed here) and the Tachometer reviewed here).  Today’s build is a fully operational, sturdy plywood 3D study model of inventor Milton Othello Reeves’ 1879 continuously variable transmission (CVT), or Variator, first used in sawmills, woolen mills and other Industrial Revolution mechanics, as part of car engines and any machine requiring a smooth changing of gear ratios.

Variator 11

No glue needed, no sanding required, with everything contained in the box, the Variator is part of UGEARS’ STEM Lab series, educational tools and fun models that aren’t just for kids, a way any family can spark an interest in science, and specifically understanding basic engineering assembly and design.

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Tach main 2

Today we’re building a fully operational, sturdy plywood 3D study model of German engineer Dietrich Uhlhorn’s 1817 invention, the Tachometer, used throughout the 19th century in locomotives and later–and still today–in automobiles.  It’s a mechanism that, when the handle is rotated, movement is transmitted through a reducer, increasing the revolutions per minute (RPMs) and displacing twin weights in a rubber band-powered centrifugal unit.  The higher the RPM, the more centrifugal force separates counter weights, shifting a movable axle with a flywheel.  A dial is fixed to the axle, and the more the axle shifts (the higher the RPM), the more the dial arrow deflects, indicating higher speed rotation.  It’s the UGEARS Tachometer, the fourth model we’re testing after the 2-in-1 Arithmetic Kit (reviewed here), the Gearbox (reviewed here), and the Random Generator (reviewed here).  The Tachometer is part of the model maker’s STEM Lab series, educational tools and fun models that aren’t just for kids.  This kit, like the Gearbox we reviewed, is part of understanding basic engineering assembly design, most apparent in your family automobile.

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Random final main

Random chance can set all kinds of activities into motion.  Remember Abed’s discussion of the dice role and its impact in Community?  Do you recall the potential impending doom as a kid shaking the Magic 8 Ball, one of the toys in the National Toy Hall of Fame?  Sure, you could settle with a coin toss or dice roll, but why?  How about mixing up your next Dungeons & Dragons event with something different?  Today we’re building a study model of a device that generates random numbers and provides different random results based on probability theory, including a 360 degree rotating octahedron that acts like an orrery, triggered by a button, with a rack-and-gear drive, overrunning clutch, and a driven wheel.  It’s the UGEARS Random Generator, the third model we’re testing after the 2-in-1 Arithmetic Kit (reviewed here) and the Gearbox (reviewed here).  The Random Generator is part of the model maker’s STEM Lab series, educational tools and fun models that aren’t just for kids.  This kit is full of surprises, and as it comes together you’ll see how science puts the “magic” in the Magic 8 Ball.

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UGEARS Gearbox final

Today we’re building a study model of German engineer Karl Benz’s gearbox, the same mechanism you’d find in the transmission of any modern automobile, complete with drive shaft, layshaft with gear couplings, reverse idler, and a gear shift.  It’s the UGEARS Gearbox, the second model we’re testing after the 2-in-1 Arithmetic Kit (check out our first UGEARS review here).  The Gearbox is part of the model maker’s STEM Lab series, educational tools and fun models that aren’t just for kids.  Anyone who has ever driven a car should know the fundamentals of how a gearbox works, and this model is an excellent start.

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You may have recently seen advertisements for UGEARS, maker of some incredible moving models made entirely from precision laser-cut plywood parts.  We laid our hands on several STEM Lab kits and are going to feature our builds of each model over the next few weeks.  These are projects that can be made generally in less than a day, and provide multiple avenues of entertainment and education.  Each model improves the maker’s ability to assemble a model, fun in itself, but like LEGO expert builder series models and Erector sets of the past, these models are engineering marvels that replicate machines for mathematics, physics, and engineering study.  More advances models in the catalog include working trains, cars, and a dragon with moving wings, which we’ll work up to.

First, let’s take a look at the Multiplier and Addiator builds, both included in the UGEARS 2-in-1 Arithmetic Kit (available here at Amazon and also via model shops and online game and craft stores) tools students from grade school through college engineering can use and display, featured as one of the starter builds in the UGEARS catalog.

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Review by C.J. Bunce

Arsenic and Old Lace?  Truth is often stranger, darker, and more insidious than fiction.  Where the classic horror comedy dramaticized the historic use of arsenic as poison via elderberry wine, a routine use of the substance killed an incalculable number of people, probably at least in the tens of thousands, over the course of a little more than a century.  Imagine everything around you right now that is printed in the color green is printed with an ink which, if you brush against it, inhale it, touch it, or ingest even a minute amount of it, would kill you violently?  A recent scholarly account weaves together a tale of 18th-19th century science and psychology, beauty, style, and design, products liability and corporate greed, political cartoonists and iconic leaders of art history, and a scholarly account of an artform and staple of the arts and crafts movement in the most unlikely of collisions with day-to-day life.  Lucinda Dickens Hawksley’s Bitten By Witch Fever: Wallpaper & Arsenic in the Victorian Home is a book about wallpaper.  And it could be the most surprising and intriguing book you read this year.

At one level Bitten by Witch Fever could be a useful tool–included in its pages are facsimiles, and thankfully only facsimiles, of 275 color wallpapers from the 19th century.  It’s almost unprecedented and an ideal sourcebook for the period, for local or commercial set decorators, or for any artists and designers attempting to recreate in any medium the average household of the day or the most opulent business setting.  Yet each of the papers represented was tested by current scientists to include arsenic.  Predominantly tied to greens of a century of wallpaper style and taste, ultimately arsenic would be worked by designers into a broad spectrum of the color palette.  But mankind has known the harm of arsenic going back to ancient times, right?  It’s the complexity of the “Why?” that art and social historian (and Charles Dickens’ great-great-great granddaughter) Hawksley wrestles with in revisiting the use of arsenic in all its forms: as domestic poison, as health tonic, as pigment enhancer, and as murder weapon, and its rise in production with the rise of fashion of decorative wallpaper.  But why “witch fever”?  That reference in the title was from a comment by apologist William Morris–the arts and crafts movement innovator artiste–who also inherited from his father one of the few mines that produced arsenic.  To brush off arsenic safety scaremongers, he had responded, “As to the arsenic scare a greater folly it is hardly possible to imagine: the doctors were bitten as people were bitten by the witch fever.”  In part, the realities were fuzzy: many people lived with wallpaper with no ill effects, and yet others sleeping in a closed room with wall-to-wall arsenic coated papers would become violently ill.  Hawksley identifies cases of alleged crimes, court cases, alleged murders, and attempts to halt arsenic use.  Throughout the 19th century political cartoonists drew cartoons mocking the public’s continuing use of the poison in daily life.  Many of these cartoons are also included in the book.

The horrors were real:  young siblings die after pulling wallpaper off their walls and licking off the strange flavor.  From an ancient Greek physician using arsenic as an antiseptic to Nero using arsenic to murder Britannicus, to Napoleon rumored to have died in exile from arsenic poisoning, to the death of a Swedish king and the Borgias, the history of the substance crosses borders and social strata.  A few countries were quick to ban its commercial use, while factories where it was used were slow to address safety issues for workers.  In 1775 chemist Carl Scheele’s new green was so vibrant that the real fever was very much public fascination with new, beautiful colors.  It was used on walls, but also in flypaper, flocked papers, rodent and insect poison, asthma and eczema cream, as a Victorian aphrodisiac, face creams and soaps, artificial decorative fruits and vegetables, dress fabrics, mail labels, playing cards, all sorts of product packaging, and (gulp) cake icing coloring, candy, and lickable postage stamps.

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