Level and collapsible ruler
OwnerDaniel P. Rohlingerinventor
Life of this patent
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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.
Claims3
A combination collapsible ruler and level comprising a coilable spring strip having a formed concave, convex cross-section and spaced edges permanently stressed to form a plurality of tightly wound convolutions when the stressed strip is collapsed and a linear ruler when uncoiled, on arcuate level tube, and mounting means for mounting said level tube on said spring strip intermediate the ends of the strip and said mounting means having a convex surface complementary to said concave strip surface and having a foot portion for engaging a supporting surface at a point spaced from the lower edge of the strip to cooperate with one of said strip edges to provide bipodal support for the strip and level when in an uncoiled condition so that a plane through the tube arc is normal to the surface upon which said strip and level combination are supported.
Dependencies are inferred from the claim text.