Dynamic force measurement system

Measuring and testing – Frictional resistance – coefficient or characteristics

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G01N 1902

Patent

active

046465570

ABSTRACT:
The coefficient of the dynamic friction of the surface of a memory disk or disks may be measured by tilting the entire memory unit, with the magnetic head being mounted for limited movement in the direction of relative movement of the head and the surface. The movement of the memory disk initially carries the head to its extreme position in the direction of movement of the disk. At a certain angle, as the memory unit is tilted from the horizontal toward the vertical, the weight of the head will overcome the dynamic force of the disk-head drag and the head movement to its lower position will be sensed; and the operative component of the weight of the head and its mount at the critical angle will be substantially equal to the dynamic drag or frictional force between the head and the associated disk or disks.

REFERENCES:
patent: 1772415 (1930-08-01), Carpenter
patent: 3376730 (1968-04-01), Clement et al.
patent: 3721115 (1973-03-01), Kearns
patent: 3813917 (1974-06-01), Cole
patent: 4416144 (1983-11-01), Chen et al.
"Apparatus for Studying the Behavior of Sliding Electrical Contacts at very High Speeds"; The Review of Scientific Instruments, vol. 42, No. 8, pp. 1250-1252; Aug. 1971; P. E. McElligot.

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