Picture frame leveling device

Details Picture frame leveling device Picture frame leveling device

1976-11-08

1978-07-18

Lesmes, George F.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33347, 33381, 33390, 206484, 428 35, 428 40, 428 43, 428166, 428172, 428178, 428307, B32B 300, B65D 6528

Patent

active

041006810

ABSTRACT:
An inexpensive spirit level having means for easy attachment to upper surface portions of picture frames or the like. The device comprises a transparent tape having blister-like cavities at regular intervals, a base tape affixed in face-to-face relation against one side of the transparent tape and having a pressure sensitive adhesive on the outside for attachment to a surface portion of a frame, and a liquid partially filling said cavities. Eash blister cavity has a bubble corresponding to the unfilled space which bubbles will move along the curvature of the blister, thereby indicating the relative position of the device with respect to a horizontal plane. Suitable markings on the transparent tape are provided to facilitate reading level position with respect to the horizontal plane.

REFERENCES:
patent: 2813349 (1957-11-01), Harris
patent: 2877555 (1959-03-01), Visockis, Jr.
patent: 3269729 (1966-08-01), Morrison
patent: 3630346 (1971-12-01), Burnside
patent: 3944692 (1976-03-01), Swenson

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