Claims
- 1. In a glass fiber drawing assembly comprising a bushing having an orifice plate with a generally planar undersurface from which fibers are drawn, a supply nozzle for directing bulk gas against the undersurface of the plate, means for applying a binder to fibers being drawn from the orifice plate, means for collecting the binder applicated fibers together to form at least a strand of glass fibers, and a collet spaced beneath the orifice plate for drawing fibers therefrom, the improvement further comprising a detector for sensing the break-out of fibers being drawn from the orifice plate, said detector including a modulated light source disposed beteen the binder applicating means and the collecting means to direct a beam of light against the fibers being drawn from the orifice plate, and a sensor disposed to sense whether the beam is being intercepted by fibers being drawn from the orifice plate, said sensor being responsive only to the modulated beam of the source.
- 2. In an assembly according to claim 1, the detector wherein the modulated light source comprises a light emitting diode which emits a beam of high frequency bursts of near infrared energy.
- 3. In an assembly according to claim 2, the detector wherein the light source and sensor are disposed to the same side of the fiber being drawn and the sensor senses energy from the source which is bounced back from the fiber.
RELATED APPLICATION
This is a division of application Ser. No. 865,961 filed Dec. 30, 1977, now U.S. Pat. No. 4,149,865, granted Apr. 17, 1979.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
865961 |
Dec 1977 |
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