| Description | 7 horse power double-acting sun & planet engine, with 15 inch cylinder, 4 foot stroke, three-bar motion.
Includes reverse sections and plans of the engine, including an alternative layout to the one adopted. The sections show a rack and sector plate motion, but one of the sections has a three-bar motion sketched in at the end of the beam, and this was what was built. Also drawings of working gear, steam pipes and air pump; boiler; method of communicating motion to the mill; drawings for new boiler, 1786; horse gin by Coates & Co.'s millwright Richard Savage, Dec. 1783.
Original Portfolio or 'Book' No. 49. Catalogue of Old Engines p. 6.
For Henry Coates and John Jarratt. Oil mill, Sculcoates, Kingston-upon-Hull, Yorkshire. Often spelt "Cotes" and "Jarrat", and often referred to as "Coates & Jarratt". This engine was formed from one half of the experimental double-cylinder tilt engine set up at Soho. It was also one of the first (the very first?) to feature a perpendicular motion.
See also: Engine Agreements, Incoming Correspondence.
Published references: Dickinson & Jenkins, p. 140-1, 164, 213, 219, plate XXXV - section of engine (note that Dickinson & Jenkins index this engine as "Cotes and Jarratt"); Tann, p. 56 - horse gin. |