Geometrical instruments – Straight-line light ray type – Rod or target
Patent
1986-04-10
1987-05-05
Little, Willis
Geometrical instruments
Straight-line light ray type
Rod or target
33161, G01C 1500
Patent
active
046620770
ABSTRACT:
Disclosed is a combination tool useful to a variety of building trades in building erection. The tool can be used as a story pole, a surveyor's rod, an extensible measuring device, a plumb and a horizontal level. When used as a measuring device, story pole or surveyor's grade rod, the tool of the present invention provides direct read capabilities eliminating the need for computations which in turn prevents errors in arithmetic commonly made when using tools of the prior art. The tool is particularly efficient for use in setting and erecting commercial store fronts typically constructed of aluminum and glass and effectively replaces at least five separate tools commonly used by the building trades.
REFERENCES:
patent: 1272976 (1918-07-01), McLucus
patent: 3190008 (1965-06-01), Weiss
patent: 3374545 (1968-03-01), Monroe
patent: 3492737 (1970-02-01), Swanson
patent: 4471532 (1984-09-01), Francis
Bocchetti Mark G.
Little Willis
Reiter Bernard A.
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