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Digital Sundial Patent The sundial comprises an hour display 12a and a minute display 12b, contained by a frame 16, which is supported by a base 18 and a stand 20. Base 18 serves to position the sundial such that its axis 22 is parallel to the earth's axis of rotation, that is, at an angle to the horizontal which is equal to the latitude of the geographical site of the sundial. The digital sundial of claim 9 wherein said apertures form elongated parallel slits extending across said mask, and wherein said mask is positioned such that the earth's axis of rotation is parallel to said elongated slits. community.middlebury.edu /~schar/sundial/patent.html   (5249 words)

Sundial - Wikipedia, the free encyclopedia A sundial designed for one latitude can be adjusted for use at another latitude by tilting its base so that its style or gnomon is parallel to the Earth's axis of rotation, so that it points at the north celestial pole in the northern hemisphere, or the south celestial pole in the southern hemisphere. A cardioid is the shape that connects the intersections between the solar-time marks of a conventional sundial, and the equal-angles of a true clock-time face. Scottish sundial — the ancient renaissance sundials of Scotland. en.wikipedia.org /wiki/Sundial   (3096 words)

Sundials on the Internet - Five sundial projects for you to make Here are six sundial projects which will demonstrate the principles of a sundial and ensure that you end up with a sundial which tells accurate sun time. The sundial should be positioned where it will be in the sun for the maximum length of time with the dial plate perfectly level and with the noon line pointing directly north. The sundial must be orientated with the gnomon pointing north/south and, of course, the dial must be located where a shadow will be cast by the gnomon most of the day (though one can move the dial from window to window as the day progresses if necessary). www.sundials.co.uk /projects.htm   (3833 words)

Sundial Summary Tilt the sundial so that it is oriented as if it were at the longitude of the center of your local time zone. The classic garden sundial uses the same principle, except the lines of the disk are projected, using trigonometry, onto a face that is parallel to the ground. Sundial Bridge at Turtle Bay — a single spar cable stayed bridge that casts a shadow into a garden where the time may be read. www.bookrags.com /Sundial   (3171 words)

The Sundial Such a sundial will however work equally well at all times if the pointer is slanted, to point towards the pole of the celestial sphere (click here for an explanation--but be warned, it is a bit complicated!). A sundial of this type can be constructed from folded cardboard or stiff paper: click here to see the basic design used around latitude 38 North of the equator, here for a corresponding one in the southern hemisphere. The sundial described here, with a gnomon pointing to the celestial pole, is a relatively recent invention, probably of the last 1000 years. www-spof.gsfc.nasa.gov /stargaze/Sundial.htm   (1479 words)

Digital Sundials International - Product information   (Site not responding. Last check: 2007-10-20) In a singular blend of artistry and utility, the digital sundial combines the ancient science of sundials and advances of modern technology with elegant simplicity. The digital sundial is designed for indoor use and ships with both a window mount and a tabletop mount, which are preset to your geographic location. More information about assembly and function of the sundial can be found in the manual that ships with the sundial. www.digitalsundial.com /product.html   (245 words)

Analemmatic sundials: How to build one and why they work An analemmatic sundial is a particular kind of horizontal sundial in which the shadow-casting object is vertical, and is moved depending on the date, or to be more precise, depending on the declination of the sun on a given day. The analemmatic sundial is perfect as a piece of large mathematical sculpture. In an analemmatic sundial the pointer is vertical. plus.maths.org /issue11/features/sundials   (3407 words)

Sundial   (Site not responding. Last check: 2007-10-20) There are three parts to this activity; building a sundial, calculating the angle of the sun using your sundial, and calculating your latitude using your sundial. Essentially, a sundial is a stick in the ground that has been calibrated to cast a shadow over specific markings at specific times. If the sundial is shaded at some point during the day, then it will not cast a shadow and the sundial will not work at that time. adelie.harvard.edu /ed/Activities/Sundial.html   (1487 words)

Sundials: How they work The Physics of a Sundial by the Univ. of Washington One is to build a horizontal sundial, where the base plate is level, and the "stick," called the style, is angled so it is parallel to the earth's axis. Another solution is an equatorial sundial, where the base plate is titled at an angle equal to the latitude, and the style is perpendicular to the base, which will align it with the earth's axis. liftoff.msfc.nasa.gov /Academy/Earth/Sundial/Sundial-how.html   (547 words)

Sundial Plans Sundial Plans were introduced by Honeywell over 30 years ago and today they still form the basis of most domestic heating systems in the UK. The standard components of a Sundial plan are room and cylinder thermostats together with a motorised valve, or valves. The Sundial 'C' Plan is designed to provide independent temperature control of both heating and hot water circuits in pumped heating, gravity domestic hot water heating installations. content.honeywell.com /uk/homes/Sundial.htm   (489 words)

The Sundial Primer - Sunny Day U - Equatorial Sundial Kit Equatorial Sundial: a dial in which the dial plate is parallel to the equatorial plane and the polar-pointing gnomon is perpendicular to it. The equatorial sundial is also used to draw a number of other sundials including horizontal, vertical and polar sundials. The equatorial sundial is a very important sundial that can teach you many things and everyone should have one. www.mysundial.ca /sdu/sdu_equatorial_sundial.html   (573 words)

Sundial will mark passage of days, seasons on Mars The sundial project was announced today during a news conference at Cornell University in Ithaca, N.Y., which is creating the experiment that will contain the sundial. Once the sundial is in place, the public will be able to monitor the passage of Martian days and seasons via the Internet. The idea for the sundial originated with Bill Nye, host of public television's "Bill Nye the Science Guy." It will be contained in a package of four instruments that make up the Athena Precursor Experiment, or APEX, on the Mars Surveyor mission scheduled for launch in 2001. www.washington.edu /newsroom/news/1999archive/04-99archive/k042199.html   (857 words)

EERE Roofus' Solar and Efficient Home: Build a Sundial Sundials are the oldest way to tell time. As the sun goes across the sky, the post in the center of the sundial casts a shadow on a circular plate. Start using your sundial on the morning of a sunny day when you'll be home all day. www1.eere.energy.gov /kids/roofus/sundial.html   (414 words)

Mission to Mars This martian sundial will also be used to calibrate Pancam, the panoramic camera on the rovers. Sundials have long been used on Earth as timekeepers. Each side of the sundial has an inscription that tells why we made the journey to Mars, and is illustrated by drawings that were submitted by students. athena.cornell.edu /kids/sundial.html   (319 words)

Unusual Gift Idea - Fine Quality Garden Sundials at Affordable Prices to Buy Online. UK A sundial is a unique garden ornament which can commemorate a wedding, retirement or other important occasion and will tell the time and enchant for generations to come. These luxuriously designed garden sundials are hand crafted in Oxfordshire, England using traditional methods and can measure time in one of four latitude regions for local accuracy. Time telling: for both sundials, the time-telling shadow is cast onto the hour band by the gnomon rod, which runs through the centre of the dial and points to the celestial pole. www.sundial-workshop.com   (223 words)

The Sundial Primer - Shadow Plane Sundial Shadow Plane Sundial: a class of dial in which the gnomon is movable and is set by the observer so that it, and its shadow, lie in the sun's hour plane. The equatorial sundial is at an angle to the horizontal equal to the co-latitude. The common style is at an angle equal to the latitude relative to the horizontal sundial's plate. www.mysundial.ca /tsp/shadow_plane_sundial.html   (944 words)

Sundial Bridge at Turtle Bay - Wikipedia, the free encyclopedia The Sundial Bridge is a cantilever spar cable-stayed bridge that spans the Sacramento River in Redding, California. This pedestrian bridge features a single 217 foot (66 metre) mast that serves as a sundial, which can be read in a garden to the north of the bridge. The shadow cast by the bridge functions as a sundial, but is only accurate one day a year - the summer solstice. en.wikipedia.org /wiki/Sundial_Bridge   (327 words)

Sundials & Armillaries - OutdoorDecor.com Sundials; the most ancient scientific instrument and the earliest documented form of time-keeping. A horizontal sundial consists of the dial plate, marked off in hours, and the gnomon which sits on the noon line and projects... Sundials by industry leaders who set the standard and provide sundials of enduring quality. www.outdoordecor.com /parentCategory.asp?CSN=337   (187 words)

Make your own Sundial   (Site not responding. Last check: 2007-10-20) Sundial for Lydenburg, in South Africa's eastern Mpumulanga Province. Sundial for Malelane, in South Africa's north-eastern Mpumulanga Province. Sundial for Nelspruit, in South Africa's north-eastern Mpumulanga Province. www.hartrao.ac.za /other/sundial/sundial.html   (1889 words)

Sundial Bridge - Redding, CA The Sundial Bridge at Turtle Bay is a beautiful, unique pedestrian bridge that crosses the Sacramento River and connects the Nationally-designated trail system in Redding, California, with the Turtle Bay Exploration Park and McConnell Arboretum. The most obvious difference between sundial time and the time shown by a modern clock is in the length of the hours due to the seasonal variation in the length of the day. Since the Sundial Bridge at Turtle Bay is a bridge that was made to span a narrow portion of the Sacramento River, it could not be aligned at the correct degrees. www.visitredding.org /sundial/sundial101.cfm   (605 words)

Queens' College Cambridge - Sundial The first sundial at this location in Old Court was erected May-July 1642, when entries in the college accounts show payments for stone, gilt, painting, etc. (see below). The Sundial, on the North side of the principal Court, and under the Clock-Dial, is counted a Curiosity, being beautifully ornamented with a variety of useful Furniture, the whole being the work of the great Sir Isaac Newton. The earliest recognisable depiction of the sundial is Storer's view of 1829. www.queens.cam.ac.uk /Queens/Images/sundial.html   (738 words)

Educator's Guide to Equatorial Sundials transit, align the sundial so that it reads exactly 12 noon (regardless of the time shown by your wristwatch); the sundial is now aligned with your local meridian. For equatorial sundials, the gnomon is a pole (or rod) of varying thickness. The sundial is a link between the sky and our need to measure time, and it's actually a model of the apparent movement of the Sun. www.wsanford.com /~wsanford/exo/sundials/equatorial_sundials.html   (2609 words)

Mars Exploration Rover Mission: The Mission It is in the shape of a sundial and is mounted on the rover deck. Pancam will image the sundial many times during the mission so that scientists can adjust the images they receive from Mars. Pictures of the shadows that are cast by the sundial's center post will allow scientists to properly adjust the brightness of each Pancam image. origin.mars5.jpl.nasa.gov /mission/spacecraft_instru_calibr.html   (270 words)

Sundials: What is Sundial "Furniture"? It is evident that the computation of such a sundial would require a good knowledge of celestial mechanics; and also, in the 17th century, the services of an expert engraver. Thus the usefulness of a sundial would be increased if the names of the zodiacal constellations are placed upon it as well as the attendant Signs. We know of one professor of astronomy in a large college, who uses a sundial with its lines of declination as a practical example to show the motions of the sun and earth. www.the-sundial-store.com /sundial-text/home-page-sundial-furniture.htm   (1144 words)

Turtle Bay Exploration Park :: Sundial Bridge The Sundial Bridge at Turtle Bay crosses the Sacramento River in the heart of Redding, California. Plazas are situated at both ends of the bridge for public use; the north-side plaza stretches to the water allowing patrons to sit at the river's edge. In addition to being a functional work of art, the Sundial Bridge is a technical marvel as well. www.turtlebay.org /sundial/sundial.shtml   (331 words)

Sundial Sculptures by John Carmichael, Jr. They are very rare since there are only a handful of sundial makers in the world who understand all of the math required and who are able to design and manufacture custom-made sundials. Astronomical laws demand that sundials be designed specifically for the location where they will be used or else they will not function correctly. Most of the typical garden-variety sundials for sale today are mass-produced from castings and are sold everywhere and are therefore, usually inaccurate. www.sundialsculptures.com   (620 words)

Cornell News: Mars sundial Pictures of the sundial, taken by the lander's panoramic camera after its arrival at Mars in January 2002, will reveal the passage of the hours and seasons as the sun moves across the Martian sky. And the sundial's central fl, gray, and white rings and corner color tiles will act as a calibration target -- a kind of test pattern -- to adjust the brightness and tint of pictures taken by the camera. The face of the sundial is engraved with the word "Mars" in Arabic, Bengali, Braille, Chinese, Danish, English, French, German, Greek, Hawaiian, Hebrew, Hindi, Inuktituk, Italian, Japanese, Korean, Lingala, Malay-Indonesian, Portuguese, Russian, Spanish and Thai. www.news.cornell.edu /releases/April99/Sundial.Apex.Nasa.html   (960 words)

Sundial A postcard of the Columbia University Sundial with Maison Francaise, St. Paul's Chapel, and Kent Hall in background. Design elements of Sundial are based upon the original gnomon and base; the image on the right side of the header of each page within the application shows the top of the granite sphere, as seen from South Field Lawn, with Kent Hall and St. Paul's chapel flanking it. The lettering used to spell out SUNDIAL is based upon the lettering of the base, as well. calendar.columbia.edu /sundial/history.php   (697 words)

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