Electro optical control to detect a filament passing through a guide eye and using a light emitting diode
AssigneeOwens-Corning Fiberglas Corporation
InventorSheldon A. Canfield
Life of this patent
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Abstract
A guide eye is provided for a filament or strand material. An electro optical control mounted on a guide, to detect the presence of a filament or strand material, has its focus on the inner surface of the guide eye closest to the sensor. The filament or strand material moving within the guide eye, causes light to reflect from the sensor light source to the light sensor creating a signal indicating the presence of filament or the strand.
Claims8
An apparatus for detecting a continuous filamentary material comprising a means for guiding said material along a primary direction of travel, an optical sensor having a light source and light detector, said means for guiding said material constraining the movement of the said material in a direction generally transverse to its primary direction of travel, said sensor having an area of focus and said sensor being placed adjacent said material and with the said area of focus of the said sensor being substantially at the outer limit of said constrained transverse movement, said detector sensing light from said source reflected from said material when said material enters said area of focus as said material moves within its said transverse direction, and wherein said sensor is substantially insensitive to said reflected light outside the said focus.
Dependencies are inferred from the claim text.