Combination level

Details Combination level Combination level

1994-09-19

1996-01-30

Will, Thomas B.

Geometrical instruments

Straight-line light ray type

With magnetic compass

33348, 33275R, 33354, G01C 928

Patent

active

054872227

ABSTRACT:
A combination level has a rectangular housing and liquid-filled vials each having an entrained gas bubble to indicate horizontal level and vertical plumb at a local location. A scope element is incorporated within the housing and utilized to ascertain level at a remote location. A lens system within the scope element allows the user to focus the image and cooperates with the horizontally disposed vial to indicate level at a distance. Alternatively, a sighting bead is incorporated into a sighting groove on the top of the housing to viewably align an object at a distance. A flip-out mirror assembly associated with a horizontally disposed vial allows the user to evaluate the horizontal level at a remote location through cooperation with the sighting bead. A recess with fixed bearings allows the housing to be mounted on a makeshift stand. The recess is tapered to promote a snug fit between the housing and the stand while the bearings on the surface allow the housing to swivel about the stand through a full range of 360 degrees.

REFERENCES:
patent: 353406 (1886-11-01), Gurley
patent: 934698 (1909-09-01), Seibert
patent: 1032379 (1912-07-01), Cole
patent: 1599122 (1926-09-01), Eubank
patent: 1658528 (1928-02-01), King
patent: 1714827 (1929-05-01), Torka et al.
patent: 1809855 (1931-06-01), Langsner
patent: 1939167 (1933-12-01), Harknes et al.
patent: 3064535 (1962-11-01), Anderson
patent: 4103430 (1978-08-01), Schrader

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