Francis Alton Calvert
Francis Alton Calvert of Calvert and Garnett
1851 Award at the 1851 Great Exhibition. See details at 1851 Great Exhibition: Reports of the Juries: Class VI.
1860 Patent 2276. 'Improvements in machinery and apparatus for opening, burring, cleaning, and carding cotton, and other fiberous materials, part of which is applicable to opening twisted yarns and woven fabrics'[1]
There are a number of other patents for Calvert in this period
1862 Image of Cotton Gins made by John Elce and Co, designed by Francis Alton Calvert.
1866 Patent 1465. 'Francis Alton Calvert and Francis Calvert both of the city of manchester, Engineers, for an invention of 'improvements in machinery for burring, ginning, cleaning, and carding cotton and fiberous substances'[2]