US3736456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric filament lamp with improved filament supporting means
Assignee: US Philips Corp
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Filing: 1971-06-25
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Granted: 1973-05-29
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Expires: 1991-06-25
Abstract
Abstract In order to obtain a good fixation of the location of the filament in the envelope of an electric incandescent lamp, in particular a miniature lamp, a slit or pit-like depression is made in the bottom of the envelope against the sides of which the bent ends of pole or supporting wires present in the lamp are located.
Inventors
- 👤 J Middelhoek
- 👤 J Snudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:44
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
An electric incandescent lamp comprising: an envelope, said envelope having jacket and a bottom, the bottom of said envelope including a prOjection extending into the internal space of the lamp, the projection defining recesses within the lamp having walls formed by the projection and the jacket; a lamp set, including an insulative bead, means to support the bead, and a filament, said filament extending along the longitudinal axis of the lamp; and at least two wires sealed in the lamp set, said wires extending along said axis of the lamp beyond the filament, each of the wires being provided with a bent part, said bent part extending transverse to said longitudinal axis, the bent parts being positioned within said recesses with the bent parts juxtaposed to and pressing the walls of the projection, said bent parts also having a limited amount of longitudinal axis play.
Claim 2
Dependent Claim
145 words
An electric incandescent lamp comprising: an envelope, said envelope having jacket and a bottom, the bottom of said envelope including a prOjection extending into the internal space of the lamp, the projection defining recesses within the lamp having walls formed by the projection and the jacket; a lamp set, including an insulative bead, means to support the bead, and a filament, said filament extending along the longitudinal axis of the lamp; and at least two wires sealed in the lamp set, said wires extending along said axis of the lamp beyond the filament, each of the wires being provided with a bent part, said bent part extending transverse to said longitudinal axis, the bent parts being positioned within said recesses with the bent parts juxtaposed to and pressing the walls of the projection, said bent parts also having a limited amount of longitudinal axis play.
Claim 3
Dependent Claim
38 words
An incandescent lamp as in claim 5 wherein said wires are supporting wires for the filament and include a V-shaped filament supporting portion and wherein the bent end portions of the wire placed within the recesses are straight.
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 |