1851 Great Exhibition: Official Catalogue: Class VI.: F. A. Calvert
27. CALVERT, F. A., 32 Cannon Street, Manchester — Inventor and Patentee.
Patent machines for wool-burring and cotton cleaning, for carding and cleaning fibrous substances, and for ginning cotton, or separating the seed from the fibre, as produced on the plantation.
Patent method of constructing burring and carding cylinders.