US3617797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pinch-base electric lamp with transversely arranged supply wires
Assignee: US Philips Corp
•
Filing: 1969-05-14
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Granted: 1971-11-02
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Expires: 1989-05-14
Abstract
Abstract A pinch-base lamp and method of making same where foils are sealed in the pinch, and secured to each foil are one end of a pole wire oriented generally parallel to the lamp axis and one end of a supply wire oriented at a right-angle to the pole wire. When the lamp is mounted the laterally extending supply wires are subjected to torsional instead of bending stress, thereby reducing the likelihood of fracturing the pinch, and the base of the pinch, being free of supply wires, may be ground to provide an accurate reference surface from the filament.
Inventors
- 👤 Riksterus Auguste Johan Meijer
- 👤 Jan Christiaan Pennekamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:26
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/38; H01K3/00; H01K3/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
An electric lamp comprising a sealed glass bulb having a central axis and a pinched-base defining a bottom end and sides, at least two-spaced foils sealed in the pinch, at least two pole wires within the bulb, each being generally parallel with said axis and each having one end secured to one foil, a filament disposed within the bulb, the ends of the filament bridging the remote ends of the pole wires, at least two current supply wires, each having one end secured to one foil in the pinch and its remote end extending through the sides of the pinch generally transverse to the pole wires.
Claim 2
Dependent Claim
106 words
An electric lamp comprising a sealed glass bulb having a central axis and a pinched-base defining a bottom end and sides, at least two-spaced foils sealed in the pinch, at least two pole wires within the bulb, each being generally parallel with said axis and each having one end secured to one foil, a filament disposed within the bulb, the ends of the filament bridging the remote ends of the pole wires, at least two current supply wires, each having one end secured to one foil in the pinch and its remote end extending through the sides of the pinch generally transverse to the pole wires.
Claim 3
Dependent Claim
23 words
An electric lamp as defined in claim 9 wherein the supply wires are oriented at approximately 90* with respect to said pole wires.
Claim 4
Dependent Claim
25 words
A lamp as defined in claim 10 wherein the base part of said pinch is ground, defining a reference surface accurately spaced from the filament.
Claim 5
Dependent Claim
36 words
A lamp as defined in claim 10 further comprising two support wires, each having one end secured to one foil within a pinch and each having its remote end extending through the bottom of the pinch.
Claim 6
Dependent Claim
16 words
An electric lamp as defined in claim 10 wherein the current supply wires comprise silicated molybdenum.
References Cited (Backward Citations)
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Cited
US2705310A
Cited
US3036236A
Cited
GB1033717A
Cited
US3443144A
Cited
US3469140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |