| 摘要 |
A safety device for an aerial lift (10) having operator controls (23) for manoeuvring its basket (20) to a desired location and including at least one passive normally closed safety switch means (30)(130), e.g. m emergency switch, operable to cut electrical supply and prevent further movement of the basket (20), the safety device comprising a switch activation device (27,160,170) extending across the basket proximate to said controls (23) and an auxiliary safety switch (26) connected in series with the safely switch means (30,130) with its contacts C1 normally closed (switch on) unless caused to open (switch off) by operation of said switch activation means, thereby cutting off said electrical supply.
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