Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1994-06-20
1995-11-07
Wirthlin, Alvin
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33377, G01C 920
Patent
active
054638178
ABSTRACT:
A leveling device is provided that has a hollow thin rectangular housing and is constructed of transparent plastic. The housing holds two different types of fluids, such as oil and water, or a mix of air and fluid. The two immiscible fluids allow the device to be used as a level which operates when the line between the fluids aligns with a datum line that is etched or marked upon the surface of the transparent housing. The device can be attached to an article to be leveled by an adhesive back on the leveling device or alternatively by thumb tacks inserted through holes provided in the housing of the device. The relatively long line between fluids allows the device to be used in judging the degree to which the article is non-level relative to its environment, and also allows the device to hang an article at a specific angle relative to a wall, floor or ceiling. A version of the level can be constructed with a flexible and bendable housing to allow the level to be used to align objects of any shape.
REFERENCES:
patent: 2559961 (1951-07-01), Howell
patent: 2584917 (1952-02-01), Powell
patent: 3269729 (1966-08-01), Morrison
patent: 3422544 (1969-01-01), Wyse
patent: 3871104 (1975-03-01), Underhill, II
patent: 4100681 (1978-07-01), Hollander
patent: 4194122 (1980-03-01), Mitchell et al.
patent: 4782597 (1988-11-01), Mills
patent: 4854047 (1989-08-01), Conanan
patent: 4944094 (1993-07-01), Depiano et al.
patent: 5063679 (1991-11-01), Schwandt
Branko Breyer, "Goniometer for Transducer Arrays", Ultrasound in Med. & Biol., vol. 2 No. 2, Feb. 1976, pp. 135-136.
LandOfFree
Picture frame leveling device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Picture frame leveling device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Picture frame leveling device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-190731