Geometrical instruments – Straight-line light ray type – Rod or target
Patent
1977-09-14
1979-02-27
Swisher, S. Clement
Geometrical instruments
Straight-line light ray type
Rod or target
73290R, 116227, G01F 2300
Patent
active
041413105
ABSTRACT:
A device for indicating the level of a poured floor comprised of an outer casing adapted to be driven into the ground, an indicator member receipt shaft which is insertable into the outer casing, and an indicator member having a scale imprinted thereon which is positionable within the indicator member receipt shaft at the height of the floor to be poured and determined by height indicator means.
REFERENCES:
patent: 1191667 (1916-07-01), Charpentier
patent: 2699140 (1955-01-01), Fisher
patent: 3117378 (1964-01-01), Bowen
patent: 3230626 (1966-01-01), Berrien
Corr Denis E.
Nitkin William
Swisher S. Clement
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