US4489252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp
Assignee: Osram GmbH
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Filing: 1982-09-10
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Granted: 1984-12-18
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Expires: 2002-09-10
Abstract
Abstract A metal sleeve 5 grips the press stem 4 of lamp bulb 1. The metal sleeve, ich is set in the metal base structure 10, has a groove 13 at its outer surface. One end 3a of a current lead-in wire 3 is placed in the groove, contacting the metal base shell 10 which thereby can be made a side contact for the lamp. The placement of the wire end 3a in the groove of the metal sleeve 5 avoids interference with adjustment and focussing of the lamp in the base shell.
Inventors
- 👤 Fritz Eckhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:54
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54; H01K; H01K1/00; H01K1/42; H01K1/46
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
306 words
An electric lamp comprising a lamp bulb (1) made of refractory glass material; a lamp press (4) formed at the bottom of the lamp bulb and having locating projections (8); a filament (2) mounted in the lamp bulb (1) and acting as the luminous element of the lamp; two lead-in wires (3) which contact the filament (2) in the lamp bulb (1) and pass through the lamp press (4) to the exterior of the bulb; a metal sleeve (5) of cylindrical shape, provided with an opening (6) in which the lamp press (4) is inserted, said sleeve having inwardly bent flaps (7) which grip and position the lamp press (4) by pressing with an elastic force against the projections (8) of the lamp press; a metal base shell (10) of cylindrical shape, having a diameter slightly larger than that of the metal sleeve (5) receiving said metal sleeve (5); a bottom contact (12) secured to the base shell (10) and insulated therefrom; wherein: a first lead-in wire is carried to the bottom contact (12) of the base shell to provide one connection terminal for the filament; the metal sleeve (5) is formed with an inwardly extending groove (13) located at the outer rim thereof, an end portion (3a) of a second lead-in wire being placed in said groove (13) to establish electrical contact of the second lead-in wire with the metal base shell (10) inwardly thereof, and without causing an obstruction or bulging of the exterior surface of the base shell (10); and wherein a solder connection (16) is provided between the metal sleeve (5) and the base shell (10) to reliably and securely position the filament within the bulb with respect to the base shell, the solder connection also soldering the second lead-in wire located in the groove (13) to the base shell inwardly thereof.
Claim 2
Dependent Claim
306 words
An electric lamp comprising a lamp bulb (1) made of refractory glass material; a lamp press (4) formed at the bottom of the lamp bulb and having locating projections (8); a filament (2) mounted in the lamp bulb (1) and acting as the luminous element of the lamp; two lead-in wires (3) which contact the filament (2) in the lamp bulb (1) and pass through the lamp press (4) to the exterior of the bulb; a metal sleeve (5) of cylindrical shape, provided with an opening (6) in which the lamp press (4) is inserted, said sleeve having inwardly bent flaps (7) which grip and position the lamp press (4) by pressing with an elastic force against the projections (8) of the lamp press; a metal base shell (10) of cylindrical shape, having a diameter slightly larger than that of the metal sleeve (5) receiving said metal sleeve (5); a bottom contact (12) secured to the base shell (10) and insulated therefrom; wherein: a first lead-in wire is carried to the bottom contact (12) of the base shell to provide one connection terminal for the filament; the metal sleeve (5) is formed with an inwardly extending groove (13) located at the outer rim thereof, an end portion (3a) of a second lead-in wire being placed in said groove (13) to establish electrical contact of the second lead-in wire with the metal base shell (10) inwardly thereof, and without causing an obstruction or bulging of the exterior surface of the base shell (10); and wherein a solder connection (16) is provided between the metal sleeve (5) and the base shell (10) to reliably and securely position the filament within the bulb with respect to the base shell, the solder connection also soldering the second lead-in wire located in the groove (13) to the base shell inwardly thereof.
Claim 3
Dependent Claim
32 words
An electric lamp according to claim 1, wherein the lead-in wire (3a) and the groove (13) are matched in size and shape such that the wire fits essentially snugly into the groove.
Claim 4
Dependent Claim
23 words
An electric lamp according to claim 1, wherein the bulb comprises a fill including halogen, and the lamp is a halogen incandescent lamp.
Claim 5
Dependent Claim
23 words
An electric lamp according to claim 2, wherein the bulb comprises a fill including halogen, and the lamp is a halogen incandescent lamp.
Claim 6
Dependent Claim
17 words
An electric lamp according to claim 1, wherein the solder connection comprises a re-melted solder ring (16).
Claim 7
Dependent Claim
32 words
An electric lamp according to claim 5, wherein the lead-in wire (3a) and the groove (13) are matched in size and shape such that the wire fits essentially snugly into the groove.
Claim 8
Dependent Claim
23 words
An electric lamp according to claim 5, wherein the bulb comprises a fill including halogen, and the lamp is a halogen incandescent lamp.
Claim 9
Dependent Claim
23 words
An electric lamp according to claim 6, wherein the bulb comprises a fill including halogen, and the lamp is a halogen incandescent lamp.
Claim 10
Dependent Claim
23 words
An electric lamp according to claim 1, wherein said inwardly extending groove (13) extends essentially axially with respect to the base shell (10).
Claim 11
Dependent Claim
23 words
An electric lamp according to claim 2, wherein said inwardly extending groove (13) extends essentially axially with respect to the base shell (10).
Claim 12
Dependent Claim
23 words
An electric lamp according to claim 4, wherein said inwardly extending groove (13) extends essentially axially with respect to the base shell (10).
Claim 13
Dependent Claim
23 words
An electric lamp according to claim 5, wherein said inwardly extending groove (13) extends essentially axially with respect to the base shell (10).
Claim 14
Dependent Claim
23 words
An electric lamp according to claim 6, wherein said inwardly extending groove (13) extends essentially axially with respect to the base shell (10).
Claim 15
Dependent Claim
23 words
An electric lamp according to claim 7, wherein said inwardly extending groove (13) extends essentially axially with respect to the base shell (10).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |