Surveying Instrument Collection
Maker |
Breithaupt, Kassel, Germany |
Model |
N/A |
Serial Number |
99214 |
Dimensions |
Telescope Length 165mm, Height 280mm |
Image |
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Description |
This is a Mining "Suspension" Theodolite consisting of a vernier reading system for the horizontal and vertical circles. The theodolite is typically used in mining surveying. The interesting design allows the instrument to be hung upside-down in mines and tunnels. The two major components of this mining theodolite include the base section (the socket component), and the upper section (the ball component). This ball and socket joint allows free and frictionless movement of the theodolite relative to the base, permitting the user to level the instrument approximately with minimum difficulty. The horizontal and vertical circles are completely enclosed, and magnifying glasses are attached at opposite ends of each circle for more comfortable vernier reading.
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History & comments |
The vernier is an auxiliary graduation, placed alongside the main one with the purpose of determining fractions of the graduation unit. The vernier is typically used with theodolites of medium or low accuracy, as well as for simple angle measuring devices. In 1992, Breithaupt was still selling the subsequent model (No. 2 TEMIN) of their mining (now scale-reading) suspension theodolite. |
Conservation |
In a wooden storage box |
Condition |
Good |
Remarks |
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Dates |
Catalogued in 1997. |