Manufacture of halogen cycle incandescent lamps

Details Manufacture of halogen cycle incandescent lamps Manufacture of halogen cycle incandescent lamps

1978-01-16

1979-12-11

Briggs, William R.

65 59A, 316 20, H01J 918, C03C 2702

Patent

active

041780507

ABSTRACT:
To permit the use of hard glass rather than silica or quartz glass, a bulb of hard glass is drawn from a length of hard glass tubing, the exhaust tube being molded on adjacent the rounded-off bulb. A mount assembly composed of filaments and two or more lead-in wires is pinch-sealed into the bulb such that pre-oxidized portions of the lead-in wires come to lie within the pinch seal. The pinch seal is rendered vacuum-tight and shaped in separate steps including repeated heating to fuse the wires to the glass and to shape the pinch seal. Subsequent to filling with inert gas, the lamp manufacture is terminated by tipping off the exhaust tube.

REFERENCES:
patent: 3113010 (1963-12-01), Willis et al.
patent: 3270237 (1966-08-01), Danko
patent: 3275879 (1966-09-01), Demarest et al.
patent: 3466489 (1969-09-01), Audesse et al.
patent: 3475641 (1969-10-01), Ayres
patent: 3494756 (1970-02-01), Damm
patent: 3743375 (1973-07-01), De Fraeye
Glass to Metal Seals, by Partridge, pp. 1, 2, 102-104, 145, 148 & 149, 19 9.

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