Universal Equinoctial Ring Dial
A ring dial or two ring universal equinoctial ring dial to give it its full name was a cutting edge scientific instrument in its time which is about 500 years ago.
Universal equinoctial ring dial. This item will ship to united states but the seller has not specified shipping options. A universal equinoctial ring dial sometimes called a ring dial for brevity although the term is ambiguous is a portable version of an armillary sundial or was inspired by the mariner s astrolabe. This outstanding brass universal equinoctial ring dial the meridian ring divided 90 0 70. The inner rim of the equinoctial ring has an hour scale while the.
It was likely invented by william oughtred around 1600 and became common throughout europe. Seller assumes all responsibility for this listing. Standard dial see related terms except for the following details the dial has bracket slides in grooves in the outer edge of the meridian ring and an engraved arrow on the bracket acts as a latitude indicator. Three ring universal equinoctial ring dial for all latitudes.
Universal equinoctial ring dial franklin mint with mahogany base. Contact the seller opens in a new window or tab and request a shipping method to your location. The ring dial is divided into sectors south 90 degrees to north 90 degrees and divided into months and further calibrated into 24 hours with an adjustable calendar calibrated into 12 months. The universal equinoctial ring dial is 2 1 2 in diameter.
Essentially it is a type of sundial that allows you to tell the time wherever you are so long as the sun is shining originally developed in the early 17th century by the.