Geometrical instruments – Gauge – With conveying wheel support
Patent
1987-01-28
1987-10-06
Haroian, Harry N.
Geometrical instruments
Gauge
With conveying wheel support
B61K 900
Patent
active
046973524
ABSTRACT:
The surface profile measuring device of the present invention comprises first and second elongated frame members, each having opposite forward and rearward ends. The frame members are pivotally connected at their adjacent ends by hinge so as to be longitudinally aligned in an end-to-end relationship and so as to be pivotal about a transverse horizontal axis. The frame members are supported by wheels adjacent the opposite ends of the device and by a mid-wheel adjacent the pivotal connection of the two frame members. A frame extension rod is rigidly secured to the first frame member and extends rearwardly therefrom. The extension rod terminates in an actuator end having a curved surface. A lever arm is pivotally mounted to the second frame member and has a forward end with a curved surface engaging the curved surface of the extension rod. As the device travels over a surface to be measured, any irregularities in the surface cause the mid-wheel to be vertically displaced such that the frame members pivot with respect to one another. In response to such pivotal movement of the frame members, the extension rod pivots the lever arm so that the recording pen moves a distance corresponding to the vertical displacement of the mid-wheel. The rearward end of the lever arm is connected to a recording assembly which continuously and accurately graphs the vertical movement of the mid-wheel and thereby records the profile of the surface.
REFERENCES:
patent: 1769521 (1930-07-01), Lamb
patent: 2175496 (1939-10-01), Troyer
patent: 2344216 (1944-03-01), Kaydon
patent: 3222787 (1965-12-01), Young
patent: 3593120 (1971-07-01), Mandula
patent: 3857183 (1974-12-01), Plasser et al.
patent: 4135304 (1979-01-01), Kuntz
patent: 4265022 (1981-05-01), Noguchi et al.
Iowa Department of Transportation Highway Division "Method of Test for Determining Smoothness Using the 25 Foot California Profilometer".
Concrete Pipe Machinery Co. "McCracken Profile Reader".
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