Expandable level

Details Expandable level Expandable level

1993-11-02

1995-05-09

Fulton, Christopher W.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33451, 33464, G01C 900

Patent

active

054128757

ABSTRACT:
An expandable level is provided, which consists of a main frame, at least one leveling vial mounted within the main frame, an extension frame and a mechanism for adjusting the position of the extension frame with respect to the main frame, so that an effective length of the level can be increased and decreased.

REFERENCES:
patent: 684846 (1901-10-01), Moss
patent: 2551524 (1951-05-01), Bullivant
patent: 2654538 (1953-10-01), Fuller
patent: 3104477 (1963-09-01), Edwill
patent: 3243888 (1966-04-01), Redding
patent: 3648378 (1972-03-01), Thingstad et al.
patent: 4607437 (1986-08-01), McSorley, Sr. et al.
patent: 5269066 (1993-12-01), Walters

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