Level and collapsible ruler

Details Level and collapsible ruler Level and collapsible ruler

1976-12-10

1978-01-31

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

With independent linear measurement

33376, G01C 918

Patent

active

040707644

ABSTRACT:
A combination collapsible ruler and level includes a pre-stressed coilable and uncoilable spring strip ruler with a level tube mounting block mounted intermediate the strip ends. The mounting block has a foot portion which engages the supporting surface to make the spring strip self-supporting on a surface with the level tube in the proper plane. When collapsed the spring strip forms two coils which abut adjacent the level mounting block to provide for convenient handling.

REFERENCES:
patent: 2720705 (1955-10-01), Vincent
patent: 2956795 (1960-10-01), Foster
patent: 3242578 (1966-03-01), Moll
patent: 3568319 (1971-03-01), Moll

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