Measuring and testing – Frictional resistance – coefficient or characteristics
Patent
1979-10-30
1981-10-13
Gill, James J.
Measuring and testing
Frictional resistance, coefficient or characteristics
G01N 1902
Patent
active
042941040
ABSTRACT:
A fixture for measuring the drive forces of a friction drive apparatus. The fixture comprises a first member having a first surface adapted to be located in juxtaposition with the friction drive apparatus. A reaction member is movably supported on the first member such that when the first member is in juxtaposition with the friction drive apparatus the reaction member is in engagement with the friction drive apparatus. The reaction member is movable relative to the first surface in response to the driving force of the friction drive apparatus. The reaction member includes reference means for indicating the relative position of the reaction member and the first surface. The reaction member is urged toward a rest position on the first surface. The magnitude of the urging force is proportional to the displacement of the reaction member from the rest position by the driving force. Thus the position of the reference means relative to the first surface indicates the magnitude of the driving force on the reaction member. Particularly, the first surface may bear reference indicia and the reference means may be a mark associated with the reference indicia.
REFERENCES:
patent: 3555895 (1971-01-01), Schmidt
patent: 3826129 (1974-07-01), Wiss
Braun Charles H.
Peffer Robert M.
Eastman Kodak Company
Gill James J.
Kessler Lawrence P.
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