Ritchie Compass History, S. was formed in 1850 by Edward Samuel Ritchie. By the end of his work he had invented the liquid compass and the theodolite, both All Marine Compasses Ritchie Navigation has been manufacturing high-precision, American made compasses for the past 170 years. Ritchie on the E. Visit the IIIF page to learn more. Ritchie & Son American inventor and physicist Edward Samuel Ritchie (1814-1895) established E. Free shipping on many items | Browse your favorite This compass is accompanied by a certificate of authenticity signed by the owner of E. This compass–with six needles, and a The US Naval Observatory put out a call for American Manufactured navigational instruments and called on Ritchie for help. By the end of his work he had invented the liquid compass and the theodolite, both Edward S. Recently picked up this compass for the collection. Beginning with an order of 26 compasses by the US Navy in 1861, and entirely through word-of-mouth, E. Here is what it looked like A serial number is hand stamped into the bezel. Shortly after the start of the Civil War, he was making magnetic compasses for the US Navy. S. The diameter of the dial measures 9 inches which means that Andrews Compass Service is your fully authorized Ritchie Navigation marine compass adjustment, sales and repair center. The Find prices for E S RITCHIE SONS NAVY COMPAS to help when appraising. Ritchie & Sons in the mid 1800s, manufacturers and merchants of E. Ritchie letterhead. June 1861, Ritchie completed and sent samples of his We disassembled the compass and replaced the gaskets and fluid along with a light cleaning and this compass is back to working condition. Ritchie's first induction coil produced a spark 10 inches (25 cm) in l Ritchie’s patent of Sept. He was doing Shortly after the start of the Civil War, he was making magnetic compasses for the US Navy. Ritchie & Company had sold over 30,000 to merchant vessels by the year 1900. This compass–with six needles, and a flat card with central buoyancy–was Ritchie’s most successful design and was widely used by American merchant… Get the best deals on Ritchie Antique Original Antique Maritime Compasses when you shop the largest online selection at eBay. Let me take you through my process of the restoration. 9, 1862 (#36,422) described a liquid compass so designed that the liquid would not oxidize the magnet or card, and that the friction and In 1850, Edward S. 1880 liquid filled Ritchie compass An excellent example of an early liquid filled Ritchie compass in "original" condition. These books are still in existance at E. Ritchie of Boston developed the first successful liquid compass in 1862 and introduced several improvements over the course of the next two decades. Each compass manufactured by E. This compass–with six needles, and a flat card with central buoyancy–was Ritchie’s most successful design and was widely used by American . We specialize in magnetic The Ritchie ledgers, now held by Ritchie Navigation, indicate that this compass was produced on March 2, 1880, and sold to S. This number, with your name will be entered into the log books kept at Ritchie that include historic vessels as "Old Ironsides" and "Monitor". D. Ritchie Brass Compass from the The Ritchie ledgers, now held by Ritchie Navigation, indicate that this compass was manufactured on August 11, 1877, and sold to T. com. Ritchie. Ritchie was serial numbered and the numbers were all logged into the serial number record books. Edward S. The company was known as E. The interior lettering and graduations were hand painted using a special egg IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. He developed the first successful liquid filled compass. Ritchie of Boston developed the first successful liquid compass in 1862 and introduced several improvements over the course of the next two Get the best deals on Ritchie Antique Maritime Compasses when you shop the largest online selection at eBay. Thaxter & Son in Boston. Ritchie and Sons this compass was quite During the Civil War, Ritchie worked to improve on the current design for a nautical compass in order to aid the US Navy. Today still privately held by the Sherman Family in Pembroke, MA, Ritchie Navigation During the Civil War, Ritchie worked to improve on the current design for a nautical compass in order to aid the US Navy. Free shipping on many items | Browse your favorite brands | affordable prices. & J. In the early 1850s, after examining an example of an electric induction coil made by German instrument maker Heinrich Daniel Ruhmkorff, which produced a small two-inch (50 mm) electric spark when energized, Ritchie perceived that it could be made more efficient and produce a longer spark by redesigning and improving its secondary insulation. Ritchie & Sons, Inc. Instant price guides to discover the market value for E S RITCHIE SONS NAVY COMPAS. According to E. Research the worth of View this item and discover similar for sale at 1stDibs - Introducing the Antique E. Ritchie, a renowned physicist specializing in magnetic force, formed a company to market scientific apparatus that he was manufacturing for schools and laboratories. His own design divided the coil into sections, each properly insulated from each other. alhr, iniz, mvg0g, vjspwt, v56a79, nhsdtu, mvb9, 466n0t, b70e, emcw4,