CLASSROOM BLACKBOARD Russian patent published in 1996 - IPC

Abstract RU 2060904 C1

FIELD: technical aids for teaching and informing, namely with use of chalk recording. SUBSTANCE: blackboard includes one or several panels with counterweights and a rope-pulley system, two tubular guides. The counterweights are mounted inside of the guides. A central panel is secured by two pairs of brackets, connected with slides, embracing the guides. EFFECT: enhanced structure of the blackboard, providing its enhanced serviceability. 3 cl, 3 dwg

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RU 2 060 904 C1

Authors

Skvirchak A.L.

Lantsman P.Sh.

Dates

1996-05-27—Published

1992-11-16—Filed