Geometrical instruments – Area integrators – Electrical
Patent
1977-11-03
1979-06-05
Stearns, Richard R.
Geometrical instruments
Area integrators
Electrical
33 1Q, 33 1N, 105161, 299 1, 364560, G01B 524, G01B 730, E21C 3508
Patent
active
041569717
ABSTRACT:
A measurement system for measuring the departures from a straight line of discrete track sections of a track along a coal face in a mine employing a vehicle having a pair of spaced wheel assemblies which align with the track. A reference arm pivotally connects between the wheel assemblies, and there is indicating means for measuring the angle of pivot between the arm and each of the wheel assemblies. The length of the device is less than the length of a track section, and thus when one of the wheel assemblies is on one track section and one is on an adjoining track section, the sum of the indicated angles will be indicative of the angle between track sections. Thus, from the length of a track section and angle, the departure of each track section from the line may be calculated.
REFERENCES:
patent: 2966743 (1961-01-01), Doudlah
patent: 3345746 (1967-10-01), Plasser et al.
patent: 3470739 (1969-10-01), Takafuji et al.
patent: 3571937 (1971-03-01), Sears
patent: 3606687 (1971-09-01), Richardson
Campbell Richard A.
Currie James R.
Deaton, Jr. Emsley T.
Kissel Ralph R.
Manning John R.
Porter George J.
Stearns Richard R.
The United States of America as represented by the Administrator
Wofford, Jr. L. D.
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