RULE Russian patent published in 2016 - IPC E04F21/00 

FIELD: construction.

SUBSTANCE: invention relates to construction, particularly, to tools used at finishing works for levelling priming and cover layers of rough plastering. Rule includes a housing made of four-sided monolithic hollow profile of a trapezoid cross section with working surface, including a straight longitudinal wedge-shaped edge, flat rear surface with a holder in form of longitudinal groove and plugs at both sides of hollow profile. Outside on working surface of said protective casing in form of spring clamp with V-shaped cross-section similar to cross-section of working surface with edge with possibility of interaction of inner surface with surface of longitudinal wedge-like edge and flat rear surface, with fasteners made in base of free ends of V-shaped cross section of working protective casing at right angle to surface of walls and facing inside V-shaped cross section of working protective casing to interact with holes, arranged horizontally on working surface and flat rear surface. Fasteners on both sides of base of free ends of V-shaped cross section of working protective casing are made in staggered order relative to each other similar to holes, made on working surface and flat rear surface, respectively, with origin on side of working surface. Protective casing used is construction plaster metal beacon, which repeats wedge-like shape of edge of tip of rule and fixed on working surface and rear surface by threaded elements, for example, screws, plane of heads of which coincides with plane of surface of working protective casing.

EFFECT: technical result consists in reducing cost of production and recovery due to simplification of design when using a known item for a different purpose.

1 cl, 5 dwg