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    • 8. 发明专利
    • Accessories for spirit levels
    • GB2564338A
    • 2019-01-09
    • GB201815987
    • 2017-03-02
    • GARY ANDREW TAYLORANTHONY DAVIS
    • GARY ANDREW TAYLORANTHONY DAVIS
    • G01C9/28
    • An accessory for a spirit level is disclosed. It comprises a pair of units (4, 5), each of which comprises a releasable clamping portion (10) adapted to fit on to the elongate member (1) of a spirit level. At least one of the units has a planar surface on the clamping portion (10) configured to be perpendicular to the plane of the working face of the level when fitted thereto. A movable member (20) is mounted for sliding movement against the planar face, one end of the movable member having a foot (21). Means (24) are provided for locking the movable member (20) relative to the clamping member (10) or to free one relative to the other, so enabling sliding movement to occur. One of the planar face of the clamping portion (10) and the movable member (20) bears at least one index mark (30) and the other a scale. By adjusting the level (1) to lie horizontally with the feet (21) of the units against e.g. a sloping floor (51), the gradient of the slope may be determined from the scale.