US3891885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen incandescent lamp
Assignee: Osram GmbH
•
Filing: 1974-01-16
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Granted: 1975-06-24
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Expires: 1994-01-16
Abstract
Abstract The lamp filament is supported in zig-zag arrangement in a mount which is composed of a glass support tube with a molybdenum wire threaded therethrough. Support wires are affixed to the glass tube in torsion-resistant manner. The molybdenum wire has flatrolled portions, is bent with its ends to U-shape, connected to sealing foils which are attached to the ends of the filament, and press sealed together with the latter, or the support tube can be utilized as exhaust tube and, for this purpose, is press sealed at one end while the molybdenum wire is cut open and removed.
Inventors
- 👤 Ewald Wurster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:51
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
146 words
In a halogen incandescent lamp comprising a tubular envelope (1) closed at each end by a press stem (2) with foil seals (7), each, a double-coiled tungsten filament (3), a gettering substance (15) inside the envelope and means (5, 11) supporting the filament inside the envelope, wherein the filament extends transversely across the tubular envelope, from one end of the press stem (2) to the other; the filament support means comprises a support tube (5, 11) of fused silica secured to at least one of the press stems (2) and located inside the envelope, and a plurality of support wires (4) secured in torsion-resistant manner to the silica tube, the support wires being spaced from each other along the length of the tube and having, alternatingly, different lengths, the support wires supporting the filament extending between said press stems in zig-zag position in the lamp envelope.
Claim 2
Dependent Claim
146 words
In a halogen incandescent lamp comprising a tubular envelope (1) closed at each end by a press stem (2) with foil seals (7), each, a double-coiled tungsten filament (3), a gettering substance (15) inside the envelope and means (5, 11) supporting the filament inside the envelope, wherein the filament extends transversely across the tubular envelope, from one end of the press stem (2) to the other; the filament support means comprises a support tube (5, 11) of fused silica secured to at least one of the press stems (2) and located inside the envelope, and a plurality of support wires (4) secured in torsion-resistant manner to the silica tube, the support wires being spaced from each other along the length of the tube and having, alternatingly, different lengths, the support wires supporting the filament extending between said press stems in zig-zag position in the lamp envelope.
Claim 3
Dependent Claim
25 words
Lamp as claimed in claim 1, wherein the support tube (11) is sealed into a press stem (2'''') and freely extends into the envelope space.
Claim 4
Dependent Claim
26 words
Lamp as claimed in claim 2, wherein the support tube (11) extends to the outside of the press stem (2'''') and simultaneously forms the exhaust-and-fill tube.
Claim 5
Dependent Claim
34 words
Lamp as claimed in claim 1, wherein a wire (6) is provided which is sealed at each end into the respective press stem (2), the support tube (5) being located over the wire (6).
Claim 6
Dependent Claim
27 words
Lamp as claimed in claim 4, wherein the wire (6) has flat-rolled portions (9) at the level of the foil seals (7) of the filament end portions.
Claim 7
Dependent Claim
14 words
Lamp as claimed in claim 5, wherein the wire (6) is a molybdenum wire.
Claim 8
Dependent Claim
25 words
Lamp as claimed in claim 4, wherein the ends of the wire (6) are bent to U-shape and are welded to the foil seals (7).
Claim 9
Dependent Claim
31 words
Lamp as claimed in claim 7, wherein the U-shaped ends (8) of the wire (6) protrude from the press stems (2) and are severed (X, X'') at one or both ends.
Claim 10
Dependent Claim
30 words
Lamp as claimed in claim 1, wherein the support tube (5, 11) is of square or triangular cross-section at least in the location of attachment of the support wires (4).
Claim 11
Dependent Claim
31 words
Lamp as claimed in claim 1, wherein the gettering substance (15) is applied to the support tube (5, 11) in the form of a tangle of wire, as disks or foils.
Claim 12
Dependent Claim
18 words
Lamp as claimed in claim 1, wherein the lamp is mounted in an outer envelope or jacket (20).
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |