| 摘要 |
FIELD: lighting. ^ SUBSTANCE: invention concerns power industry object construction, particularly devices of electric street and square lighting. Street lighting mast includes basement and upper part connected by joint, device for vertical lift and descent of upper part, and lighting devices. Basement and upper part ends are slanted at sharp angle and conjugated to each other along broken sawtooth line. Joint connection is mounted at the sharp top of basement, while lift device is installed in mast basement niche and features hauling cable connected to lower sharp end of upper mast part over a pulley positioned in mast cavities. Reverse spring is installed at mast basement to disrupt upper mast part balance when it is leant down. ^ EFFECT: reduced cost of mast production and operation cost, improved reliability of street lighting. ^ 1 dwg |
