Geometrical instruments – Area integrators – Electrical
Patent
1978-08-16
1980-02-05
Stearns, Richard R.
Geometrical instruments
Area integrators
Electrical
G01B 308
Patent
active
041864930
ABSTRACT:
A straight edge comprising a plurality of longitudinal members that are positioned together in slidably telescoping relationship. At least one longitudinal edge of the members forms a substantially straight edge throughout the telescoping range of the longitudinal members. The extended members preferrably are marked with graduations along the straight edge.
REFERENCES:
patent: 844536 (1907-02-01), Prindle
patent: 904830 (1908-11-01), Boeck
patent: 1119450 (1914-12-01), Parr
patent: 1629829 (1927-05-01), Linn
Amid Ahamed A.
Khan Amir U.
Khan Habib U.
Stearns Richard R.
Todd, Jr. Oliver E.
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