Projection measuring scale

Details Projection measuring scale Projection measuring scale

1975-11-18

1981-02-03

Aegerter, Richard E.

Geometrical instruments

Straightedge type

Rules

B43L 700

Patent

active

042479860

ABSTRACT:
This invention, a measuring device, utilizes a projection of filtering method to facilitate reading of very fine lineal graduations such as 64ths, half millimeters and decimal hundredths of an inch whereby two series of lineal graduations perform two separate functions coordinating to filter lineal graduations through to the measuring edge. The first series extends to the measuring edge performing the measuring function, the second series pulling a short distance away from said edge providing a guidance means function while also indicating divisional breakdowns in fractions, millimeters and decimal hundredths.

REFERENCES:
patent: 3202129 (1965-08-01), Weldon
"The Odd Rule," Instruments & Automation, Mar. 1958, Girard Schivley, p. 469.

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