Device for determining the size dash number of standard O-rings

Details Device for determining the size dash number of standard O-rings Device for determining the size dash number of standard O-rings

1974-10-29

1976-06-29

Aegerter, Richard E.

Geometrical instruments

Area integrators

Electrical

33147T, G01B 508, G01B 320

Patent

active

039655806

ABSTRACT:
A pair of telescoping elongated prisms locked against separation provide a series of size indications by dash numbers for standardized O-rings in a series of windows. Each face of the inner prism has a semicylindrical projection which matches a similar projection on the outer prism and rests up against it to form what looks like a stationary pulley wheel. Also, the inner prism is provided with diameter-determining grooves. The outer prism also has on each face, or most faces, a projection that looks like a pulley wheel and is the same size as that formed by the matching semi-cylindrical projections and is spaced away from it. The use of the windows in the outer prism and the figures printed on the inner prism enables one to determine the size number of any standard O-ring by first determining its diameter from the measuring grooves and then inserting it on the proper pulley-like projections and extending the slide until the O-ring is taut but not stretched and then reading the dash number size of the O-ring in the appropriate window.

REFERENCES:
patent: 648390 (1900-05-01), Coe
patent: 2401920 (1946-06-01), Farrance
patent: 3391462 (1968-07-01), Craine
patent: 3696511 (1972-10-01), Bixler

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