BEURTEILUNG DES PRÄZISIONSNIVELLIERINSTRUMENTS MOM Ni-A 31 IM LAUFE EINES PATENTRECHTSSREITS

Abstract

These days theoretical accuracy and practical efficiency of level instruments with com· pensators exceeds those of the conventional bubble equipments. This paper is dealing with the qualification of an accurate autoset level Type MOM Ni-A31 elaborated and licenced by P. Tóth and improved and produced by the MOM Hungarian Optical Works. The equipment - due to its excellent construction: high sensitivity compensator, ensuring unchanged line of direction with high precision, rigid connection between the cross hairs and objective - is suitable to per- form levelling tasks requiring high precision, e.g. for measuring vertical crustal movement networks. According to examinations performed in Hungary and abroad the autoset level in question exceeds the precision of internationally known instruments not only in accuracy, but also effectively decreased the vibration sensitivity and thereby ensuring invariable line of direction even in magnetic field. Finally, the production and commercial possibilities of the instrument are discussed in reflection of the licence law.