Caliper rule device having extended measurement range

Details Caliper rule device having extended measurement range Caliper rule device having extended measurement range

1980-02-07

1981-09-29

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

33147T, G01B 502

Patent

active

042914655

ABSTRACT:
A caliper rule device capable of measuring the inside and outside dimensions of objects which vary widely in size. A block and an elongate bar are attached to a scaled rule and to a slide member on the rule. The block has a pair of openings for alternately receiving a pin, depending upon whether an inside or outside dimension is to be measured. The bar has a plurality of spaced openings along its length for mounting a second pin. The openings are located such that when the pins are applied to an object, the measured dimension is equal to the reading on the scale plus a predetermined number which depends upon the position of the second pin on the bar

REFERENCES:
patent: 1070816 (1913-08-01), Kunik
patent: 3367032 (1968-02-01), Johnson
American Machinist, "Extensions for Vernier Calipers," 3/1/33, pp. 152 and 153.

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