Up, down or horizontal plumb bob

Details Up, down or horizontal plumb bob Up, down or horizontal plumb bob

1981-02-24

1982-06-22

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Diverse directional indicator

33369, 33392, G01C 1510

Patent

active

043355226

ABSTRACT:
A transparent plumb bob having a fixed point and an associated movable point, to be aligned therewith for determination of a vertical line through a given exterior point, optionally including means for horizontal leveling and easily securing the bob intermediate the ends of a string. A vertical or horizontal line is determined by fixing one string end to a point spaced from the plumb bob and then pivoting the plumb bob and other string end about the point until the associated indicators are in alignment.

REFERENCES:
patent: 2113993 (1938-04-01), McLaughlin
patent: 2637912 (1953-05-01), Baldwin
patent: 3789512 (1974-02-01), Gros

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