Geometrical instruments – Area integrators – Electrical
Patent
1979-11-02
1981-09-15
Little, Willis
Geometrical instruments
Area integrators
Electrical
33 1Q, 33144, G01B 520, G01B 528
Patent
active
042889260
ABSTRACT:
Portable apparatus for use in measuring vertical deviation of the surface of a rail from a reference plane. The measuring device includes a pair of guide beams and a hand-powered carriage which move along the beams. A sensor, which follows undulations resulting from rail wear, is mounted on the carriage and is coupled to the pen of a recorder.
REFERENCES:
patent: 1417703 (1922-05-01), Waffenschmidt
patent: 4069590 (1978-01-01), Effinger
Coleman David F.
Gustafson Ralph A.
Long Lennart E.
Steele Roger K.
Deeley, Jr. Harold P.
Farmer Herbert E.
Little Willis
The United States of America as represented by the Secretary of
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