Bellieni Nancy Tachymetric Compass
Bellieni antique precision instrument Nancy, France (one unit available)
Details
Engraved on this measuring instrument is the inscription BELLIENI - NANCY, corresponding to Henri Bellieni (1857-1938). Bellieni was a manufacturer of optical instruments and photographic cameras who founded his company, H. Bellieni et Fils, in Nancy, France.
It is also inscribed Medaille or Paris 1889.
The tachymetric compass was used to measure distances in wooded areas, to lay out road networks, for cadastral surveys, and even for
surveys and even in mining, but it could not be used in places with magnetic anomalies.
magnetic anomalies.
The tachymetric compass, like the theodolite or the conventional compass, is still a
goniometer, i.e. an angle gauge, which 'is fitted with a stadiometer foresight, which is the one that allows the distance to be
is the one that allows the distance to a signal or sight to be measured".
The piece is mounted on a tripod that makes it possible to level it, for which it has a spherical and a tubular level.
spherical and a tubular level. A plumb bob is suspended from the axis of the tripod to centre the instrument.
In addition, the piece itself has different screws that allow it to be moved.
18 cm, 21cm, 20,5 cm
(one unit available)
