Open circuit leveling measuring system

Details Open circuit leveling measuring system Open circuit leveling measuring system

1989-07-05

1991-02-12

Yasich, Daniel M.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

G01C 504, G01C 922

Patent

active

049913026

ABSTRACT:
An open circuit measuring system (10) for discerning the vertical distance between selected locations is provided. The system includes first and further members, each having a base portion (14) with a bottom (16), and an upright tube (18) which contains liquid. The tube (18) is open at its top, and extends upwardly from the base portion (14). Fluid communication is provided between the tubes proximate their lower portions (22). A scale is carried by the tubes along their lengths, such that a user can discern, as marked by the level of liquid in the tube (18), the distance in selected units of measure between the bottoms of the first and further base portions.

REFERENCES:
patent: 375450 (1887-12-01), Karr
patent: 386924 (1988-07-01), Kegel
patent: 915084 (1909-03-01), Eberhard
patent: 1012993 (1911-12-01), Dissett
patent: 1042248 (1912-10-01), McGowan
patent: 2614572 (1952-10-01), Wisney
patent: 3132428 (1964-05-01), Haissig et al.
patent: 3310880 (1967-03-01), Watts
patent: 4686773 (1987-08-01), Brewer

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