CONSTANT REFERENCE MARK INSTALLED IN SUPPORT OF CONTACT NETWORK Russian patent published in 2003 - IPC

FIELD: electrical engineering, construction and running of various structures. SUBSTANCE: invention deals with measurement of dimensions or angles of objects, topographic instruments and accessories, constant reference points and boundary signs. Given constant reference mark includes immobile and separable parts and bushing with female thread. Bushing is fitted with wedge-and-slit fixtures intended for anchoring in support of contact network. Bracket with attachment screw is attached to bushing with the aid of bolt. Recess is made in upper rounded part of adjustment screw. Bracket can accommodate support of geodetic instrument put on adjustment screw to ensure transmission of two coordinates to recess in adjustment screw. Geodetic scale stick can be also put on upper rounded part of adjustment screw to transmit third coordinate. EFFECT: enhanced reliability of anchoring reference mark in support of contact network, possibility of employment of reference mark in the capacity of stand of geodetic instruments. 1 dwg