Level construction and methods of constructing a level

Details Level construction and methods of constructing a level Level construction and methods of constructing a level

1982-09-30

1984-08-07

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

With protector or shock absorber

33379, G01C 908, G01C 1718

Patent

active

044635010

ABSTRACT:
A level instrument for determining angular relationships includes a frame having a rail section defining a working surface, a vial, and an end plate affixed to the frame. The end plate has a plastic body with integral lip, shoulder and stake or pawl elements. The frame includes passages which receive the stake or pawl elements to permanently interconnect the end plate and frame. Indexing elements automatically orient a shoulder and an edge of the end plate adjacent to the rail section defining the working surface to prevent false level readings occasioned by displacement. A method for constructing the level of the invention which includes affixing the end plate to the frame, displacing a portion of the lip overlaying the frame passage into the passage, to permanently anchor the end plate to the frame. A second method for constructing the level of the invention wherein the end plate is urged axially onto the frame end until flexible pawls extending from the end plate engage recesses in the frame passages permanently anchoring the end plate to the frame.

REFERENCES:
patent: 1690053 (1928-10-01), Charlton
patent: 1777429 (1930-10-01), Charlton
patent: 2103743 (1937-12-01), Doty
patent: 2716804 (1955-06-01), Johnson
patent: 3191727 (1965-06-01), Schmeltz

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