US3736455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for the filament body of a tubular lamp
Assignee: US Philips Corp
•
Filing: 1971-08-24
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Granted: 1973-05-29
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Expires: 1991-08-24
Abstract
Abstract A support for the filament body of tubular incandescent lamps, the support being formed by a length of metal wire having a coiled end surrounding the filament body and having an equally coiled portion engaging the inner wall of the lamp vessel, characterized in that the length of wire comprises a portion extending in the direction of length of the vessel and being secured in the pinch of the vessel.
Inventors
- 👤 V Notelteirs
- 👤 E Janssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:43
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/18; H01K1/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
185 words
An electric incandescent lamp comprising a tubular bulb vessel, preferably an incandescent halogen lamp, the ends of the vessel being closed by pinches, the incandescent lamp comprising a helically wound filament body extending in the direction of length of the tubular vessel and having its ends secured in the pinches of the lamp vessel, said filament body being held at least at one place between the pinches of the lamp vessel by a support formed by a length of metal wire having a coiled end surrounding the filament body and having an equally coiled portion extending transversely of the axis of the lamp and bearing on the inner wall of the tubular lamp vessel, wherein the support is provided with a portion extending in the direction of length of the lamp and secured in the pinch, and wherein the end of the support has a plurality of turns engaging each other, the length of this configuration being at least equal to the pitch of the helically wound filament body, the inner diameter of said configuration slightly exceeding the outer diameter of the wound filament body.
Claim 2
Dependent Claim
185 words
An electric incandescent lamp comprising a tubular bulb vessel, preferably an incandescent halogen lamp, the ends of the vessel being closed by pinches, the incandescent lamp comprising a helically wound filament body extending in the direction of length of the tubular vessel and having its ends secured in the pinches of the lamp vessel, said filament body being held at least at one place between the pinches of the lamp vessel by a support formed by a length of metal wire having a coiled end surrounding the filament body and having an equally coiled portion extending transversely of the axis of the lamp and bearing on the inner wall of the tubular lamp vessel, wherein the support is provided with a portion extending in the direction of length of the lamp and secured in the pinch, and wherein the end of the support has a plurality of turns engaging each other, the length of this configuration being at least equal to the pitch of the helically wound filament body, the inner diameter of said configuration slightly exceeding the outer diameter of the wound filament body.
Claim 3
Dependent Claim
23 words
An electric incandescent lamp as claimed in claim 1 wherein a support is secured in each of the two pinches of the lamp.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |