Letters patent granted to Alexander Mitchell, civil engineer,

1833 Sept. 16.
Bibliographic Details
Main Creator: Great Britain. Sovereign (1830-1837 : William IV)
Contributors: Mitchell, Alexander, 1780-1868
Summary:Letters patent granted by William IV to Alexander Mitchell of Brickfield in the parish of Ballymarrett, Co. Down, civil engineer, for his invention of 'A dock of improving construction to facilitate the repairing, building or retaining of ships and other floating bodies' within Ireland.
Format: Manuscript
Notes:Large vellum document, lacking seal and cords.

Alexander Mitchell was an Irish civil engineer and inventor. Although blinded by smallpox, he invented a number of machines. In 1833, he took out a patent for the screw-pile and screw-mooring systems, simple yet effective means of providing foundation for lighthouses and beacons on mud or sandbanks and for mooring ships.

Physical description: 1 item (folded).

Call Number View In Collection
MS 50,334
Manuscripts Reading Room
Access Note
Reproduction rights owned by the National Library of Ireland.