Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or... – With vibration damping device
Patent
1989-09-11
1991-02-19
DeMeo, Palmer C.
Electric lamp and discharge devices
With support and/or spacing structure for electrode and/or...
With vibration damping device
313271, 313279, 313579, H01K 118
Patent
active
049947079
ABSTRACT:
To reliably retain a filament (13) axially aligned in a bulb (2) of a halogen incandescent lamp, a first current supply lead (8) is shaped to engage the inner wall (14) of the bulb at spaced corners or bend points (16, 21, 22, 424), the corner or bend points being connected by connecting legs (17, 18, 425). The legs and corner points can be arranged in triangular configuration (FIGS. 1-3; FIGS. 10-13) or in cross shape (FIGS. 4-9), and the remote end (15) of the filament, weld or push-connected to the connecting legs or end portions of the current supply lead. The polygonal corner and bend point engagement with the inner wall of the tube provides for substantially improved resistance against vibration of the filament; the engagement of the first corner or bend point, which bends the upper portion of the current supply lead towards the interior of the bulb and towards the filament, upon vibration, results in axial deflection, thereby maintaining the filament in axial position and preventing lateral excursion.
REFERENCES:
patent: 2863082 (1958-12-01), Lamb
patent: 3898505 (1975-08-01), Danko
patent: 3982145 (1976-09-01), Lipton
patent: 4529908 (1985-07-01), Jacrot
patent: 4876482 (1989-10-01), Stadler
DeMeo Palmer C.
Patent-Treuhand Gesellschaft fur elektrische Glum.b.H.
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