REFERENCE POINT Russian patent published in 2007 - IPC G01C15/04 

FIELD: the invention refers to measuring technique particularly to arrangements for definition of displacement of the rocks, of the elements of building constructions and engineering structures.

SUBSTANCE: the reference point has springs with branches whose ends are designed for fixation of the reference point in the controlled zone and means of communication with a traction transmitting the movement of the reference point. The mean of communication is fulfilled on one of the branches in the shape of an additional spring with elements clutching the traction passed through them. The main spring of the reference point provides elastic mobility to the branches of the reference point necessary for installation and fixation of the reference point in the controlled zone. The additional spring provides possibility to bolting the traction transmitting the movement of the reference point, at that this bolting is mobile, simple and reliable at the same time. The technical result: the absence of accurate and fixed sizes and correlations of mutual position of the elements of the bolting and the traction allows to use the reference point for the work with a measuring traction in the shape of a rod of a nonstandard diameter.

EFFECT: the proposed construction of the reference point distinguishes with easiness in manufacturing and is simple in using, provides possibility of installation and quick mounting of the arrangement inside the well, at any depth.

12 cl, 2 exp, 6 dwg