Measuring and testing – Dynamometers – Responsive to force
Patent
1986-02-25
1988-07-26
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to force
73DIG3, G01L 510
Patent
active
047592265
ABSTRACT:
A device for measuring the tensile force on a thread includes a housing having thread guides at the points of inlet and outlet of the thread. A spring plate is mounted on the housing intermediate the thread guides and has a dumbbell-shaped guide member at its end for engaging the thread. The spring plate is so mounted that the tension on the thread displaces the spring plate from its initial unflexed position. Adjacent the guide member on the movable spring plate is a permanent magnet which moves with the spring plate as it displaces. A sensor employing the Hall effect is fixed to the housing at a given distance from the magnet. Movements by the magnet are detected by the Hall sensor, which produces an output signal indicative of the displacement of the spring plate, which signal is processed to give an indication of the thread tension.
REFERENCES:
patent: 1211820 (1917-01-01), Burbank
patent: 2674127 (1954-04-01), Garrett et al.
patent: 3280623 (1966-10-01), Saxl
patent: 3495454 (1970-02-01), Heimes
patent: 3994162 (1976-11-01), Auckland et al.
patent: 4041779 (1977-08-01), Greb
patent: 4098115 (1978-07-01), Bueb et al.
patent: 4393725 (1983-07-01), Satterfield
patent: 4597297 (1986-07-01), Smith
FAG Kugelfischer Georg Schafer (KGaA)
Ruehl Charles A.
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