Sensing arrangement on a material roll

Details Sensing arrangement on a material roll Sensing arrangement on a material roll

1985-02-19

1986-10-28

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

200 6116, 226 11, 335205, G08B 2100

Patent

active

046201840

ABSTRACT:
Sensing arrangements on material rolls are used to give advance warning when the material web forming the roll approaches its end. Usually this involves the sensing of the reduction of the the roll diameter with the help of a sensing device resting against the roll periphery. In the case of roll suspensions where the center of the roll is not fixed, these sensing arrangements cannot be used. The present invention uses a sensing arrangement which comprises a field-generating element, e.g. a permanent magnet, present in the center of the roll, together with a movable sensing device resting against the periphery of the roll, e.g. a heavy current switch which is acted upon at a certain predetermined field strength, and in a suitable manner indicates that a roll replacement is imminent.

REFERENCES:
patent: 3081958 (1963-03-01), Kegg
patent: 4204180 (1980-05-01), Usui et al.
patent: 4401865 (1983-08-01), Benoy
patent: 4422402 (1983-12-01), Ogihara

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