Roll diameter sensing device

Details Roll diameter sensing device Roll diameter sensing device

1982-07-27

1984-05-15

Little, Willis

Geometrical instruments

Area integrators

Electrical

33136, 33178D, G01B 510

Patent

active

044479573

ABSTRACT:
The device for sensing the outer diameter of a roll of web upon unwinding of the web from the roll for the actuation of a control member when the diameter of the roll has been reduced to a predetermined minimum diameter, comprises a follower arm capable of swinging movement to-and-fro in the direction of the axis of the roll around a fixed axis and urged in the direction of the said roll axis. The swinging movement of the follower arm controls the actuation of a control member. The follower arm carries a feeler element intended to bear against the circumferential surface of the web roll, and the said feeler element is constructed as a gauging fork or snap gauge having a pair of arms which are spaced between each other of a predetermined distance, in such a manner that the clear distance or clearance between the said two arms corresponds to the predetermined minimum diameter of the roll.

REFERENCES:
patent: Re30868 (1982-02-01), Mori
patent: 1542808 (1925-06-01), Adams
patent: 3110110 (1963-11-01), Forrester et al.
patent: 3201057 (1965-08-01), Ryan
patent: 3285525 (1966-11-01), Buckler
patent: 3519213 (1970-07-01), Hofmann et al.
patent: 3802085 (1974-04-01), Schoonmaker
patent: 4215482 (1980-08-01), Szewczyk

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