Instrument de navigation sur la nouvelle côte de brevet de Norwood Harrison - Acajou, Cuivre, Laiton - Fin du XIXe siècle

Description
Instrument de navigation sur la nouvelle côte de brevet de Norwood Harrison - Acajou, Cuivre, Laiton - Fin du XIXe siècle
Angleterre

Coastal navigator, originally silver-plated copper analogue “computer” on a mahogany panel with mahogany cover, patented by Norwood Harrison and made by T. Barton, Limehouse London.

Harrison's 'New Era' coastal navigator was also sold by H. Hughes Son, 59 Fenchurch St London - a copper analogue computer on a mahogany panel for setting a course by triangulation, patented by Norwood Harrison, who may have been an English master sailor.

The instrument is mounted on a mahogany plate with a mahogany cover with a total size of 50.5 x 36.5 x 9.5 cm.

The cover is removable by means of two sliding hinges and can be locked with two metal sliding hooks.
The metal parts of the instrument are of yellow copper or brass. Originally, the brass was silver-plated. The matt silver layer is still present at the back of the rulers.

The central screw, which holds the metal rulers together, has broken off, but the parts are still present.
The wooden box has some scratches and has a label with a handwritten text:
"This is the TOP Side

Do not jar or shake the

Instrument

With Care"


The instrument is numbered: No. 897
A similar instrument with number 902 is present at the Science Museum in London. It is part of the Math Exhibition at the Winton Gallery as an early "analogue computer" and another example in the collection of the Peabody Yale Museum of Natural History


Will be well packaged and sent by registered mail

Informations du lot
Objet
Instrument de navigation sur la nouvelle côte de brevet de Norwood Harrison
Matériau
Acajou, Cuivre, Laiton
Designer/Artiste
Norwood Harrison
Fabricant/Marque
T. Barton London
Modèle/Nom
Coast Navigator
Époque estimée
Fin du XIXe siècle
Pays d’origine
Angleterre
État
Bon état - quelques usures et tâches dues à l’âge
Dimensions
9.5×36.5×50.5 cm
Poids
6.47 kg
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