|
Date: |
|
Description: | Coutureau Invr
INSTRUMENTS DE PRECISION / NIVELLEMENT GEODESIE / HENRI [Coutureau? illegible] / [illegible] / PARIS
The quintant has a polished chrome-coated bronze frame with a protective cover over the mounts. The tangent screw, working against a spring-loaded stop, and the clamping screw are located on the back of the index arm. The instrument has no shades. Index-glass adjustment is made by a screw and the horizon-glass is non-adjustable. There is no telescope but a sighting arrow is inscribed on the frame. A compass, with a diameter of 38 mm, is mounted at the centre of the frame, graduated between one and three. The quintant is fitted with an edge bar needle with a jewelled pivot cap, and a needle locking mechanism operated by a milled knob on the back of the frame. The instrument is contained in a red velvet-lined leather carrying case with the strap missing. There is a stamp in the lid for ?Instruments de Pr�cision Nivellement G�od�sie Henri [illegible] Paris?.
The instrument has a chrome scale from -4� to 152� by 1�, measuring to 149�. Vernier 0-100 grads.
The maker may have been Henri Morin, who worked in Paris from 1880; nothing has been found on Coutureau. Following the metric system, the scale division of 400 grads to a circle instead of 360 degrees was introduced in France shortly after the French Revolution. Most theodolites and similar instruments from European countries are still graduated in this way.
AUDIT - object needs marking with its ID number.
caption: Surveyor's Quintant - Front
caption: unavailable
caption: Surveyor's Quintant | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Sextant Henri Vernier sextants Coutureau | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
|
More Like this...
-
-
-
-
-
-
Quintant
13
Lorieux, Lepetit. Sucr Paris.…
-
-
-
Quintant
?D42?
?Thomas Jones Charing Cross…
-
|