Detector of false rotation of power screwdriver

Details Detector of false rotation of power screwdriver Detector of false rotation of power screwdriver

1988-12-15

1990-03-06

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

29407, 81429, 340540, 340679, G08B 2100

Patent

active

049069802

ABSTRACT:
The start of the final tightening of a screwdriver and rotation of the screwdriver after the start of the final tightening are detected. The detected rotation is compared with a standard value. The screwdriver should rotate very little during the final tightening, if it is normally operated. Consequently when the detected rotation is more than the standard value, one may assume false rotation of the screwdriver has occurred.

REFERENCES:
patent: 4571696 (1986-02-01), Bitzer
patent: 4620450 (1986-11-01), Yamaguchi

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