John Quincy Adams : Patent for Building Clocks Henry Clay Secretary of State Start Price USD 3,950.00 Current Price USD 3,950.00 Time Left - Bid Count 0 Buy It Now Price USD 4,500.00 Reserve Price - Start Time Friday, July 18, 2008 End Time Monday, July 28, 2008 Location White Plains, New York See more about 'John Quincy Adams : Patent for Building Clocks' Description Patent for Building Clocks John Quincy Adams.  DS.  November 6, 1827.  Washington.  4pg.  11 ¼” x 14 ¾”.  Cosigned by Henry Clay  as Secretary of State. Summary: Patent granted to Harrison G. Dyer for “a new and useful improvement in the construction of Clocks”.    Partial Transcript “the application of what may be termed an endless lever, instead of the common tooth and pinion..  Let there be a wheel of the same number of teeth as it is required that this wheel should revolve slower than the arbor into which it is to be geared & of such a width that these teeth shall not be of too great, an angle when a line drawn across the circumference & shall pass the opposite extreme of the teeth two & two. The arbor into which this wheel is to be geared, is to have no teeth, but a groove out in & round itso that one turn shall be of the same length on the arbor as the width of the wheel. The distance from the point of contact on the circumference of the wheel to the center should be to the point of contact on the arbor to the centre as the velocity of one is to the velocity of the other so that ~f a line be wound round the arbor at the point of contact it will be equal in length to one tooth of the wheel... “.   Biography: Harrison G. Dyar was a prominent American inventor for his time. In 1828 Dyar created one of the first telegraphs in the United States when he sent electrical sparks through chemically treated tape to burn dots and dashes. In 1838, he was granted a patent for making soda from brine and ammonia carbonate.   More items regarding prominate historical icons can be found at http://www.sethkaller.net/catalogs/featured-inventory   ABOUT THE SELLER For over 20 years, Seth Kaller has been the largest buyer of important and authentic historic documents. More than ten thousand rare manuscripts, documents, maps, and books handled by Kaller are now in museum collections, including working drafts of the United States Constitution that were acquired for the Gilder Lehrman Collection at the New-York Historical Society, and a signed copy of the 13th Amendment that was acquired for the Lincoln Museum of Fort Wayne, Indiana.   Kaller is a member of the Manuscript Society and the Antiquarian Booksellers Association of America.  References are available upon request.   For more information about us, see www.sethkaller.net/about/   TERMS This document comes with my absolute guarantee that it is original and authentic. If this is ever proven not to be authentic, it may be returned for a full refund.   I accept personal checks and money orders. If paying by personal check, the item will not ship until the check has cleared. Credit card payments are accepted through paypal. We are also happy to use www.escrow.com. 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