Surveyor's tool
OwnerDonald Iliffinventor
Life of this patent
Estimating the term…
Abstract
A surveyor's tool to facilitate the measurement of the elevation of an invert within a manhole includes a rod with a dimensioning along its length. The tool further includes a slide moveable with respect to said rod. The slide includes a pair of opposing arms, the arms extending from opposite sides of the slide and extending perpendicular to the length of the rode. The slide further includes an inclinometer for measuring the angle of incline of the rod. Using the length of the rod extending into the manhole and the angle of the rod as determined by the inclinometer the depth of the invert can be calculated.
Claims13
A device for measuring the depth of a point in a manhole where said manhole has an upper surface, said device comprising
- an elongate pole, said pole having a longitudinal axis and a width,
- a slide moveable along said pole,
- extension means on said slide, said extension means extending perpendicular to said axis of said pole, said extension means for resting on said upper surface of said manhole,
- said extension means having a longitudinal edge,
- a marker on said slide for marking a length of said pole,
- said marker aligned with said extension means for reading a length of said pole below said manhole upper surface,
- an inclinometer for determining the angle of incline of said dimensioned pole, and said edge of said extension means intersecting a midpoint of said elongate pole wherein said reading of length is taken at a centerline of said pole.
A surveyor's tool for use with an elongate rod having dimensional marking thereon and having a longitudinal axis, said surveyor's tool comprising
- a slide for slideable movement along said elongate rod parallel to said longitudinal axis,
- an elongate member extending from opposite sides of said slide perpendicular to said longitudinal axis,
- means on said slide for determining a length of said elongate rod extending below said elongate member,
- an inclinometer on said slide for determining an angle of inclination of said elongate rod, and
- an angle indicating means oriented to read perpendicular to a reading from said inclinometer, said angle indicating means for determining when said elongate member is horizontal wherein said inclinometer will measure an angle from a plumb.
A surveyor's tool for use with an elongate rod, said elongate rod having a longitudinal axis, said tool comprising
- a slide for slideable movement along said elongate rod,
- a transverse member on said slide, said transverse member having an axis perpendicular to said axis of said elongate rod,
- a bubble indicator on said slide for indicating when said transverse member is horizontal,
- an inclinometer means on said slide, said inclinometer means for determining an angle of inclination of said elongate rod with respect to a plumb,
- marker means on said slide for designating a reading point along said elongate rod for measuring from said reading point to an end of said rod.
A surveyor's tool for determining an elevation of an object comprising
- an elongate rod,
- an inclinometer for determining an angle of inclination of said elongate rod,
- a bubble indicator for indicating when said inclinometer is determining an angle with respect to a plumb, and
- measurement means along a length of said rod.
Dependencies are inferred from the claim text.