FIELD: instrumentation.
SUBSTANCE: device for survey of cross drift sizes comprises a plate and range finders fixed on a plate on two sides of the plate in staggered order. The plate above its centre of gravity is perpendicularly fixed with a pipe, which is located on a horizontal guide, with the possibility of moving on it with the help of a cord fixed with a pipe. Range finders are connected to each other by means of an electric wire and with a control mechanism, besides, the guide is made, for instance, from a steel rope, and the electric wire connected with range finders, is arranged on the guide and is fixed with the help of, for instance, clasps, and is fixed on them by means of clamps.
EFFECT: increased accuracy of measurements.
4 cl, 6 dwg
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