Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1987-01-13
1989-02-14
Lindsay, Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 102, 65 111, 65 36, 65 40, 264 14, 350 9618, 373 2, 373 24, 21912125, 21912127, 21912131, C02B 37075, G02B 600, C03B 2309
Patent
active
048043958
ABSTRACT:
A system is provided for positioning a pair of electrodes on either side of the end portion of an optical fiber extending through a contact, to establish an arc through a cross-aperture in the contact and across the fiber to melt the fiber into a lens, which assures close control of the arc and which prolongs the life of the electrodes. The tips of the electrodes are positioned to lie slightly within opposite ends of the cross-aperture, to avoid establishing an arc between the electrodes which passes around the contact instead of through the cross-aperture. The electrodes are spaced apart by at least about eight times the diameter of the optic fiber, to avoid deposition of vapors from the heated optic fiber onto the electrodes. The cross-aperture extends to the tip of the contact, so the contact can be moved along its axis to a position where the electrodes lie on opposite sides of the fiber end portion.
REFERENCES:
patent: 3617687 (1971-11-01), Katawoka
patent: 3711908 (1973-01-01), Borers
patent: 4219722 (1980-08-01), Rudd et al.
patent: 4243399 (1981-01-01), Khoe et al.
patent: 4345930 (1982-08-01), Basola et al.
Clark Kenneth M.
Coutts Bruce
ITT Corporation
Lindsay Robert L.
Peterson T. L.
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