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Cooke Troughton and Simms / 1940’s Scope / made In UK /surveyors level
$650
Rare and vintage surveyor’s level / DUMPY LEVEL - SURVEYORS THEODOLITE made by Cooke Troughton and Simms, made in England in 1940’s, in original case.
Distributed in the 40’s by Agent Precision Instrument sydney.
This tilting level by Cooke, Troughton & Simms is a high precision levelling instrument primarily designed for first-order geodetic levelling.
The telescope is supported at its centre by a pivot and may be tilted (up and down) by turning the "tilting screw" which is located on the stage component of the level between the telescope and the base at the eyepiece end. This tilting screw enables the telescope to be precisely levelled before each staff reading, without altering the height of the telescope.
A parallel plate micrometer (range = ??) is attached to the telescope near the objective end (as seen in the image) for precise levelling. It is easily detached from the level when storing the instrument in the box. It's function is to determine the distance between the point where the line of collimation (line-of-sight) of the level intersects the staff and the next lower staff graduation, and thus eliminates the need for estimation.
One interesting characteristic of the instrument is that both the images of the tubular bubble and the observed staff are able to be viewed simultaneously through the eyepiece end of the telescope. The small lower eyepiece, located between the telescope and the tribrach next to the tilting screw, is for reading the horizontal circle, and is used for setting-out angles and for tacheometric surveys in reasonably level terrain.
Cooke Troughton and Simms / 1940’s Scope / made In UK /surveyors level
Distributed in the 40’s by Agent Precision Instrument sydney.
This tilting level by Cooke, Troughton & Simms is a high precision levelling instrument primarily designed for first-order geodetic levelling.
The telescope is supported at its centre by a pivot and may be tilted (up and down) by turning the "tilting screw" which is located on the stage component of the level between the telescope and the base at the eyepiece end. This tilting screw enables the telescope to be precisely levelled before each staff reading, without altering the height of the telescope.
A parallel plate micrometer (range = ??) is attached to the telescope near the objective end (as seen in the image) for precise levelling. It is easily detached from the level when storing the instrument in the box. It's function is to determine the distance between the point where the line of collimation (line-of-sight) of the level intersects the staff and the next lower staff graduation, and thus eliminates the need for estimation.
One interesting characteristic of the instrument is that both the images of the tubular bubble and the observed staff are able to be viewed simultaneously through the eyepiece end of the telescope. The small lower eyepiece, located between the telescope and the tribrach next to the tilting screw, is for reading the horizontal circle, and is used for setting-out angles and for tacheometric surveys in reasonably level terrain.
Cooke Troughton and Simms / 1940’s Scope / made In UK /surveyors level
- Date Listed:03/07/2023
- Last Edited:07/09/2023
- Condition:Used
- Shipping:Pickup Only
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