Electric lamp and discharge devices – With gas or vapor – Incandescent filament lamp
Patent
1987-04-29
1989-01-31
Boudreau, Leo H.
Electric lamp and discharge devices
With gas or vapor
Incandescent filament lamp
313271, 313272, 313274, 313285, H01K 124, H01K 118
Patent
active
048018457
ABSTRACT:
To positively position the components of a filament mount, including filats (6, 7) and a cover cap (11) shrouding a filament, for use in a dual-filament automotive-type lamp, one of the current supply leads (10') is extended towards the exhaust tip (4) of the lamp. A guide element (13), which terminates in an at least essentially part-cylindrical region, is melted-in into the exhaust tip (4), and receives the end portion (12) of the current supply lead. If the element is springy, for example a spiral spring permitting compression, the spring (13) and the current lead wire (10') can be welded together, particularly for lamps which have low thermal loading. In lamps which have high thermal loading, the end (12) of the current lead (10') is preferably received loosely within the spiral spring to minimize heat transfer; additionally, a heat insulating jacket (14), for example in form of a small ceramic tube or a glass coating, can be interposed between the spiral spring (13) and the current supply lead.
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patent: 4651048 (1987-03-01), Liebe
Boudreau Leo H.
Horabik Michael
Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
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