Incandescent lamp having two lead-in conductors sealed within on

Details Incandescent lamp having two lead-in conductors sealed within on Incandescent lamp having two lead-in conductors sealed within on

1985-08-23

1986-12-02

Moore, David K.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For filament

313315, 313274, 313318, 313279, 313269, 313285, 313579, 313341, H01J 548, H01J 550

Patent

active

046267352

ABSTRACT:
A tungsten-halogen lamp including a tubular quartz envelope wherein both of the lead-in conductors designed for providing electrical energy to the lamp's coiled filament are strategically positioned within a single, press-sealed end portion of the lamp's envelope. Electrical connections to the lamp may thus be provided at only one end thereof to thereby facilitate positioning and connection of the lamp within a photocopier or similar machine. The lamp is suited for high wattage applications (i.e., about two-hundred watts per linear inch of filament or greater) by the utilization of an expansion coil section which is provided in one of the lamp's two lead-in conductors to prevent bowing of the lead-in conductor and its quartz sleeve. This coil section enables the conductor to expand during the high temperatures encountered when the lamp is operated at such high wattages.

REFERENCES:
patent: 3493808 (1970-02-01), McClusky et al.
patent: 3760217 (1973-09-01), Martin et al.
patent: 3912960 (1975-10-01), Danko
patent: 4442374 (1984-04-01), Morris et al.

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