| 摘要 |
FIELD: construction. ^ SUBSTANCE: ceiling support comprises base and extended cantilever installed with the possibility of rotation on the base between their longitudinal ends and with possibility of rotation around horizontal second axis. The first lever to retain load and the second lever to carry counterbalance are coupled with both ends of cantilever. At the same time useful load is located on the first lever with the possibility of rotation around the third axis, and counterbalance is located on the second lever with the possibility of rotation around the fourth axis. The third and fourth axes are parallel to each other and lie with the first axis in a single common vertical plane. Distance between point of useful load effect at the first lever and the third axis equals distance between the latter and vertical axis. Distance between centre of gravity of counterbalance and the fourth axis measured in longitudinal direction of the second lever equals distance between fourth axis and vertical first axis. Besides, both levers are joined to each other by means of connecting facilities so that in any position of rotation they are arranged as opposite and parallel to each other. ^ EFFECT: invention provides for positioning of useful load in space with complete balancing of weights as a result of counterbalance. ^ 13 cl, 7 dwg |
