Scale

Details Scale Scale

1997-03-27

1999-03-02

Gutierrez, Diego

Geometrical instruments

Straightedge type

Rules

33476, B43L 700

Patent

active

058755578

ABSTRACT:
Disclosed is a scale so marked with centimeters and inches that inch-and-foot marks are made on the basis of the correct metric set of marks to be recurrently in alignment with selected metric marks at every spatial period, Thus, the exact linear measurement is permitted according to the metric system, and at the same time, the approximate inch-and-foot linear determination is permitted readily by sight.

REFERENCES:
patent: 1497492 (1924-06-01), Engel
patent: 1778922 (1930-10-01), Tait et al.
patent: 3250010 (1966-05-01), Smith
patent: 4134213 (1979-01-01), Kushmuk
patent: 4301596 (1981-11-01), Sedlock

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