Universal Equinoctial Ring Dial

Three ring universal equinoctial ring dial for all latitudes. This outstanding brass universal equinoctial ring dial the meridian ring divided 90 0 70. 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.

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Universal equinoctial ring dial.

Contact the seller opens in a new window or tab and request a shipping method to your location. The universal equinoctial ring dial is 2 1 2 in diameter. It was likely invented by william oughtred around 1600 and became common throughout europe. Its clearly one of the few still being made and appears for sale at a number of different places.

This item will ship to united states but the seller has not specified shipping options. The inner rim of the equinoctial ring has an hour scale while the. I found a universal equinoctial sun ring dial for sale at grand illusions this particular version is about 3in across. 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.

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. Universal equinoctial sun ring dial then i found another interesting pocket sundial. Seller assumes all responsibility for this listing. 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.

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.

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A Standing Mechanical Universal Equinoctial Ring Dial Giltered And Silvered Steel Height 40 6 Cm 16 In Signed Heath Wing Strand London Circa 1760

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