Method and apparatus for measuring length

Details Method and apparatus for measuring length Method and apparatus for measuring length

1975-08-01

1977-05-24

Martin, Jr., William D.

Geometrical instruments

Area integrators

Electrical

33172F, 242 36, G01B 1904

Patent

active

040246450

ABSTRACT:
The invention provides an apparatus and method for continuously measuring the length of linear material during winding of the material onto a rotating core to form a package. First means form an electrical signal whose frequency is proportional to the instantaneous diameter of the package being wound. Second means form at least one pulse of fixed length for each revolution of the package. A gating means allows the variable frequency signal to reach an output line only during the period of each said fixed length pulse and a counter algebraically counts at least a proportion of the individual cycles of said signal reaching said output line.

REFERENCES:
patent: 3087248 (1963-04-01), Martin

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