Geometrical instruments – Area integrators – Electrical
Patent
1982-05-12
1983-11-08
Haroian, Harry N.
Geometrical instruments
Area integrators
Electrical
33174E, 33175, 33459, G01B 520
Patent
active
044134193
ABSTRACT:
An apparatus and method is provided for measuring remotely at a position above ground the angle of the notch in a manhole weir for obtaining information to calibrate the monitoring equipment and includes a cross member having a pair of pivotally attached end members adapted to move into engagement with the weir within the V-shaped notch for assuming the shape thereof.
REFERENCES:
patent: 79032 (1868-06-01), Tierney
patent: 94968 (1869-09-01), Moore
patent: 777606 (1904-12-01), Knowlton
patent: 3995373 (1976-12-01), Brumbelow
Haroian Harry N.
Kleinke Bernard L.
Metropolitan Sanitary District of Greater Chicago
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