G - Physics – 05 – D
Patent
G - Physics
05
D
341/47
G05D 3/00 (2006.01)
Patent
CA 1056933
ABSTRACT OF THE DISCLOSURE In a method and apparatus for producing roving with a controlled number of strands, each strand, withdrawn from the inside of a respective hollow strand serving package, is ad- vanced along a given path so that light directed to the element is reflected therefrom within the package. Changes in the reflected light are sensed to provide an indication of changes in the speed of the strand. Signals are produced in response to the changing reflected light and the advancement of the strands is controlled in response to the signals.
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