Log
Nom de l'objet : | Log |
Catégorie de l'objet : | Distribution & Transportation Artefacts |
Sous-catégorie de l'objet : | Water Transportation- Accessory |
Matériaux : | Metal, Brass Fibre, Plastic (?) |
Numéro de catalogue : | WP.1983.015.01 |
Numéro d'accession : | WP.1983.015.01 |
Date de début de production : | c.1861 |
Description : | Log; metal, Brass, fibre, rope, plastic (?); spear shaped; white, brown; white painted metal tip, rope entwined over metal; hallow tube; top has a white plastic (?) panel with three dials; transcription at end; tube continues with heart shaped metal plate on top; second metal shaft attached by screws has four metal propellers attached, this is able to rotate. |
Commentaires : | This 'frictionless' ship's log was the first effective model to be commercially produced, and was originally patented by Edward Massey in 1802. This example is a development known as the 'A1 Harpoon Log' patented in 1861. and was made by T. Walker & Son Ltd., a scientific instrument maker based in London, but with a factory in Birmingham. The mechanical log has a five blade propeller, each blade marked with an anchor and 'T.W'. The white enamelled dial plate has three dials and is marked: 'T. WALKER'S/PATENT/HARPOON/SHIP LOG/-A.1.-/London'. As the brass outer case rotates, it moves the hands around the dials, thus ascertaining the speed of a ship as it passes through water. Thomas Walker (1805-1871) was Edward Massey's nephew. Although he set up in business in Birmingham separately, he became interested in his uncle's invention. He improved it, began making them for Edward Massey's successors, and finally the business was acquired by Thomas Walker & Son. |
Longueur : | 53 |
Diamètre extérieur : | 4 |
Translittération de l'inscription : | T.WALKER/ PATENT/HARPOON/SHIP LOG/ A.1 |
Établissement : | West Point Lighthouse Facebook-West Point Lighthouse Twitter-West Point Lighthouse YouTube-West Point Lighthouse |
Ville de l'établissement : | O'Leary |
Province de l'établissement : | Prince Edward Island |
Coordonnées de cette page web
-
Pour proposer des corrections ou des mises à jour sur cette page, veuillez contacter directement le Réseau canadien d’information sur le patrimoine (RCIP).