| 摘要 |
The apparatus for measuring the deflection angle with respect to the vertical allows a reading both lateral and from the top or from the bottom. The deflection angle is directly expressed in degrees. A main member (1) of the apparatus indicates the 45<o>, 90<o> and 135<o> angles, particularly required when laying for example construction elements. A cylindrical hollow (3) of the main member (1) is covered on both sides with transparent plates (4 and 5). An axis (7) passes between the two plates (4 and 5), said axis being parallel to the base surface (2) of the main member. An angle indicator element (8) is arranged on the axis by means of a bore. The lower arm (10) of the angle indicator element (8) is provided with an additional weight (11). |
