Accession Number : ADD012999

Title :   Apparatus for Measurement of Sliding Friction Using Gyroscopic Mass.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bloomer,James W , II ; Nunn,Robert H

Report Date : 12 Feb 1985

Pagination or Media Count : 7

Abstract : Described is an apparatus and method for measuring the coefficient of sliding friction between a pair of surfaces. A sphere with a hole through one diameter is held in a chamber within a tube. The axis of the tube and the hole through the sphere are out of alignment by a predetermined angle, theta. The sphere is held within the chamber and the entire unit is caused to spin. The sphere is released while the unit is spinning. The gyroscopic nutation of the sphere causes the spherical bore to traverse the angle theta and align with the tubular bore in a time dependent upon the sliding friction between the material of the sphere and the material of the chamber. A primary object of invention is to provide a simple compact apparatus and method for measuring the coefficient of sliding friction between two materials.

Descriptors :   *PATENTS, *MASS, *SLIDING FRICTION, *GYROSCOPES, TUBES, CHAMBERS, MATERIALS, MEASUREMENT, SURFACES, SPINNING(MOTION), COEFFICIENTS, SPHERES, DIAMETERS, INVENTIONS, BORES, TUBULAR STRUCTURES

Subject Categories : Navigation and Guidance
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE