Measurement method and apparatus

Details Measurement method and apparatus Measurement method and apparatus

1986-08-29

1987-12-15

Stearns, Richard R.

Geometrical instruments

Straightedge type

Plural straightedges, relatively moveable

235 61GM, B43L 706

Patent

active

047123087

ABSTRACT:
Method and apparatus for interpolating elevation values and related locations from data provided on drawings by using an instrument with a supporting scale bar on which are mounted two slides that each has an extension arm. In use, the slides are set at the elevation values of the points on the drawing and one of the slides is moved along the scale bar intersecting a graphic scale at various intervals. The movable arm on the slide intersects the line joining the points on the drawing at various intervals.

REFERENCES:
patent: 364630 (1887-06-01), Bowyer
patent: 986248 (1911-03-01), Van Duyne
patent: 1553683 (1925-09-01), Furbish
patent: 2309855 (1943-02-01), Maddox
patent: 2575328 (1951-11-01), Bardach
patent: 2605960 (1952-08-01), Lores

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