FIELD: lighting engineering.
SUBSTANCE: device has hollow movable lever (1) made in form of pipe with vertical plates and blanks (2) and (3) secured at end faces. Secured on ends of lever (1) are immovable support (4) and movable support (5). Mechanism compensating for mass of lighting fixture includes spring (6) whose one end is secured in immovable piston (7) connected with support (4) by means of rod (8). Other end of spring (6) is secured in movable piston (9). Fitted inside spring (6) is tension screw (10) whose one end is secured in piston (7) and other end is secured in cup (11). Located in cavity of lever (1) is rod (12) of parallel link mechanism and friction torque amplifiers (15) are mounted on supports (4 and 5).
EFFECT: reduced vertical sizes; extended functional capabilities.
2 cl, 3 dwg
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