Bakelite And Plastic Museum The database of the site is filled with bakelite kitchen and homeware, radio's, clocks, jewelry, and cameras. Each item has its comprehensive description. Includes images, books, links. http://www.bakeliteandplasticmuseum.org/
Huygens' Clocks M. Bennett, MF Schatz, H. Rockwood, and K. Wiesenfeld, Huygens clocks , to appear in Proceedings (A) of the Royal Society (2001). ( PDF format.). http://www.physics.gatech.edu/schatz/clocks.html
Extractions: A 336 year-old synchronization puzzle explained In 1657, Christiaan Huygens revolutionized the measurement of time by creating the first working pendulum clock. In early 1665, Huygens discovered ``..an odd kind of sympathy perceived by him in these watches [two pendulum clocks] suspended by the side of each other.'' The pendulum clocks swung with exactly the same frequency and 180 degrees out of phase; when the pendulums were disturbed, the antiphase state was restored within a half-hour and persisted indefinitely. Huygens deduced that the crucial interaction for this effect came from ``imperceptible movements'' of the common frame supporting the two clocks. He thought this synchronization could be used to provide the exquisite timing necessary to solve the famous ``longitude problem'' in maritime navigation and spent many years developing and testing designs for pendulum clocks that function at sea. Ultimately, the innovation of the pendulum clock did not solve the longitude problem. Nevertheless, Huygens' synchronization observations have inspired modern studies of sympathetic oscillations in many areas of nonlinear science. Previous attempts to understand Huygens' findings are few and ultimately unsatisfying. Our experiments and our theoretical model reproduce Huygens' observations. The pendulums are attracted to the antiphase state, never the inphase state. As Huygens surmised, the platform motion is the culprit: if we prevent the platform from moving, there is no synchronization at all. Our analysis shows that damping effects favor antiphase motion, since inphase oscillations induce additional counter-motion of the frame. And while the clock escapements can transfer energy into the inphase mode, it is never enough to overcome this frictional disadvantage.
Snapdragon Gifts On-Line Store Candles, book, aroma therapy, cards, clocks, jewelry, art,Tshirts and sculpture. Many gifts with a New Age theme. http://www.snapdragongifts.com
Antique Clocks From Carnegie Painting And Clocks Currency Converter. Carnegie Paintings and clocks UK. Specialising in Antique clocks and Paintings. Welcome to Carnegie Paintings and clocks. http://www.paintingsandclocks.com/
Extractions: Currency Converter Welcome to Carnegie Paintings and Clock s . We are a small, family run business that combines quality with affordability. Based in Plymouth, Devon, England, we offer a superb selection of antique clocks and 18th century paintings through to Modern British. We always stock a selection of Oil portraits and other decorative images. Antique clocks especially the Longcase clock are wonderful pieces of furniture as well as still serving a purpose. We maintain a stock of around fifteen clocks ranging from the thirty hour longcase through to good London and provincial longcase's. Click on the link to longcase clocks to see a sample of our stock.
Ransley Clocks Watches UK retailer of mechanical clocks and watches. http://www.ransleyclocks.co.uk
Clocks & Timepieces clocks Are Us . Welcome to My wife (KL) and I have been collecting and restoring clocks timepieces for about 14 years. Our main http://webpages.charter.net/time-saver/
Extractions: "Clocks Are Us" We collect and restore clocks and timepieces only as a hobby (an all consuming one at times). We are providing this information on the web in an effort to promote interest in preserving these important pieces of American history, as well as to provide reference material to folks who may be interested. The historical data included within is as accurate as I can provide at this time. If there is additional information, or corrections you can provide, please email your ideas to me. I am constantly updating the data sheets, as more information is acquired. Please note, that our interests are in preserving horological items, we do not sell pieces from our collection or provide online appraisals Although all of these clocks and timepieces are not antiques, they are still equally as important to us, as some of them have been passed down from family members. My hopes are that some day, this collection and the information contained within will be passed down in my family, and the data provided will at least give some background as to what the items are, and how they were acquired . If you have any questions or comments, be sure to drop me, or KL an Email by clicking one of the Email buttons below.
The History Of Clocks The History of clocks. The history of clocks is very long, and there have been many different types of clocks over the centuries. Sundial clocks. http://www.arcytech.org/java/clock/clock_history.html
Extractions: The History of Clocks The history of clocks is very long, and there have been many different types of clocks over the centuries. Not all historians agree on the history of the clock. The word clock was first used in the 14th century (about 700 years ago). It comes from the word for bell in Latin ("clocca"). Using the Sun The first way that people could tell the time was by looking at the sun as it crossed the sky. When the sun was directly overhead in the sky, it was the middle of the day, or noon. When the sun was close to the horizon, it was either early morning (sunrise) or early evening (sunset). Telling the time was not very accurate. Sundial Clocks The oldest type of clock is a sundial clock, also called a sun clock. They were first used around 3,500 B.C. (about 5,500 years ago). Sundials use the sun to tell the time. The shadow of the sun points to a number on a circular disk that shows you the time. In the big picture below on the right, the shadow created by the sun points to 9, so it is nine o'clock. Since sundials depend on the sun, they can only be used to tell the time during the day.
GPS: The Role Of Atomic Clocks - Summary system. Rabis Clock The discovery of the basic physics that makes atomic clocks possible. Practical Applications - The history http://www.beyonddiscovery.org/content/view.asp?I=458
Extractions: Magnetic stripes and isotopic clocks Oceanographic exploration in the 1950s led to a much better understanding of the ocean floor. Among the new findings was the discovery of zebra stripe-like magnetic patterns for the rocks of the ocean floor. These patterns were unlike any seen for continental rocks. Obviously, the ocean floor had a story to tell, but what? An observed magnetic profile (blue) for the ocean floor across the East Pacific Rise is matched quite well by a calculated profile (red) based on the Earth's magnetic reversals for the past 4 million years and an assumed constant rate of movement of ocean floor away from a hypothetical spreading center (bottom). The remarkable similarity of these two profiles provided one of the clinching arguments in support of the seafloor spreading hypothesis. A team of U.S. Geological Survey scientists geophysicists Allan Cox and Richard Doell, and isotope geochemist Brent Dalrymple reconstructed the history of magnetic reversals for the past 4 million years using a dating technique based on the isotopes of the chemical elements potassium and argon. The potassium-argon technique like other "isotopic clocks" works because certain elements, such as potassium, contain unstable, parent radioactive isotopes that decay at a steady rate over geologic time to produce daughter isotopes. The rate of decay is expressed in terms of an element's "half-life," the time it takes for half of the radioactive isotope of the element to decay. The decay of the radioactive potassium isotope (potassium-40) yields a stable daughter isotope (argon-40), which does not decay further. The age of a rock can be determined ("dated") by measuring the total amount of potassium in the rock, the amount of the remaining radioactive potassium-40 that has not decayed, and the amount of argon-40. Potassium is found in common rock-forming minerals, and because the potassium-40 isotope has a half-life of 1,310 million years, it can be used in dating rocks millions of years old.
Extractions: all words any words Shop by Product Cellular Shades Cornices Door Blinds ... Wood Blinds Captivating colors great insulators! Bring nature indoors! Traditional style superb light control! EXPRESS SEARCH I am interested in: Select A Product Cellular Shades Draperies Fabric Venetians Faux Wood Blinds Mini Blinds Pleated Shades Roller Shades Roman Shades Sheer Horizontals Sheer Verticals Shutters Verticals Wood Blinds Woven Woods My color choice is:
Dave's American Clocks Here is a virtual museum containing the bulk of my collection of old and antique American clocks. clocks that are for sale are marked as such. http://www.prestigeclockrepair.com/museum/
Extractions: Here is a "virtual museum" containing the bulk of my collection of old and antique American clocks. Most of these clocks are not for sale I just wanted to share them with other clock enthusiasts and the curious. However, the realities of collecting and limited shelf space have forced me to sell some of my collection through the Deux Amis Trading Company . Clocks that are for sale are marked as such. Clocks not marked are not for sale. The category titles on this page are links to thumbnail photographs and more detailed descriptions. The descriptions contain the sorts of details about condition and history that collectors find interesting I hope you find the interesting and informative, too. Click on the thumbnails for more detailed pictures. This site is best viewed at 800x600 or better screen resolution. I am a member of the National Association of Watch and clock collectors (NAWCC), and I certainly encourage others who are interested in old clocks (or watches) to join this organization. They're located on the web at http://www.nawcc.org
All Star Trophies & Engraving - Home Page Awards, statues, display cases, clocks and gifts, figurines, plaques, sports memorabilia, and corporate gifts. http://www.allstartrophies.com/
Extractions: W As you browse through the on-line catalog you will find a huge selection of trophies and plaques. You may want to print out pages of interest to you, as we do not print catalogs thus enabling us to pass that savings on to you. Any trophy can have the figure of your choice placed on the top, and you can view these figures by going to the "figures" section of the on-line catalog. We have added over 60 new acrylics for you to choose from. Acrylics are a beautiful way to say "thank you...job well done!". The variety is vast with a price range to fit every budget. We urge you to check out our new "Clearance" page. This page will change often and will feature many items at drastically reduced prices. These items will be limited so grab them while you can! For that Corporate Award that will stand out from the rest, please check out our "Gallery" of strikingly beautiful handcrafted awards made from natural marble, slate, glass, wood, and metal.
Digital Clocks Timers Countdown Clock Electronic Kits Manufacturer of LED digital clocks, digital timers, countdown clocks, electronic kits, audio switches, binary clock, telegraph keys, and cool gadgets. http://electronicsusa.com/
Extractions: Amateur Radio Products Electronic LED Art Clocks Audio Switch Products Electronic Kits ... Great Links Popular Quick Links Binary Clock Audio Switch Products Mini Telegraph Keys Updated: June 5, 2004 Kit Cat Clock back in stock! CK-8000 LED Small Scoreboard A Mini Portable Scoreboard CK-6 Digital Day Counter Clock Counts DAYS - Hours - Minutes Count Up or Count Down 1996 - 2004 ElectronicsUSA.com - Whiterook Products Company Countdown Clock LED Digital Clocks UTC Clock 24 Hour clocks 6 numeral display clock 24 hour clock Large digital clocks Dual Time Zone Clock Digital Wall Clock Electronic Kits Binary Clock LED Low Power Lighting countdown timer Small Plastic Boxes Plastic Cases Plastic Enclosures project boxes construction boxes experimenter boxes electronics education mathematics education Ham Radio Amateur Radio Clocks Iambic keyers keyer paddle combination CW Morse Code Keys Code Practice Oscillator Keyer Paddle Broadcast Equipment Low Power LED Flashlight QRP Keyers LED Clocks Light Emitting Diode LED Display Time, Unique Gifts Hobbies Six Digit Clock Flashing LED Light PIC microcontroller projects PIC microcontroller kits high efficiency lighting unusual clocks weird clocks conversation piece clocks cool products LED display clocks large display clocks LED clock displays large LED digital clocks low cost plastic boxes Mini-Keys miniature electronic products electronic gadgets gizmos paddle keyers Ham Radio QRP products clock integrated circuits clock chips clock ic's electronics hobby kits electronic kit building antenna accessories dipole antenna center insulator electronic timepieces small plastic product boxes PIC microprocessor projects PIC
Clocks For Math All of my clocks have the minute ticks on them. Be certain that the hour hand gets drawn in its real place when you use the sheets with the blank clocks. http://donnayoung.org/math/clock.htm
Extractions: Help with Acrobat YoungMinds CD-ROM Homeschool Community and Forums Home History ... DonnaYoung.org Clocks Math: Paper Math Charts Unit Multipliers Drill Sheets ... Scale Paper All of my clocks have the minute ticks on them. With the 12 Blank Clocks sheet, you can take advantage of the minute ticks and make advanced practice sheets for your child by using times such as 11:37 or 9:12. *Be certain that the hour hand gets drawn in its "real" place when you use the sheets with the blank clocks. Draw the clock hands These are all easy: 12:00, 1:00, 2:00, etc.. Write the time These are easy: 12:00, 1:00, 2:00, etc.. 12 Blank clocks Handy for customized practice. 2 Large Clocks 4 Large Clocks Whose space is this? Advanced Make a Teaching Clock
The CimCrafts Christmas stables and nativity sets, birdhouse clocks, welcome stakes and wedding birdhouses made to order. http://www.members.tripod.com/cimcraft/
Clocks clocks. Before this time, mechanical clocks were large, fixed devices. The spring driven clock made it possible to carry the time around with you. http://www.twingroves.district96.k12.il.us/Renaissance/University/Inventions/Clo
Extractions: Flush Toliet ... The Match In the beginning of the Renaissance time period, we can see the first portable clocks developed in Florenece, Italy, in 1410 by Filippo Brunelleschi, a famous architect. Before this time, mechanical clocks were large, fixed devices. The spring- driven clock made it possible to carry the time around with you.
