ARRANGEMENT FOR PNEUMATIC MEASURING OF DEVIATION FROM THE STRAIGHTFORWARDNESS OF THE AXLE OF AN OPENING Russian patent published in 2007 - IPC G01B13/00 

FIELD: the invention is directed on expansion of the diapason of measuring.

SUBSTANCE: the arrangement for pneumatic measuring of deviation from the straightforwardness of the axle of an opening has a pneumatic measuring device of differential type connected with a sensitive element in the shape of a pneumatic plug provided with two systems of measuring nozzles located in one axle plane on opposite elements of the cylindrical plug. At that each system is connected with the corresponding measuring chamber of the device and has a central and an edge nozzles connected between themselves. The central nozzle of the first system is located on one of the elements of the plug, in its central part, the edge muzzle is located on an diametrically opposite element on some distance from the central part, the central nozzle of the second system is located on one axle with the central nozzle of the first system on the opposite element, and the edge nozzle of the second system is located on the opposite element relatively to the central nozzle of the second system on some distance from the central part of the element of the cylindrical surface of the plug in opposite direction from the location of the edge nozzle of the first system.

EFFECT: expands diapason of measuring.

4 cl, 1 dwg