US4396860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp with a sleeve-shaped cap
Assignee: US Philips Corp
•
Filing: 1980-08-06
•
Granted: 1983-08-02
•
Expires: 2000-08-06
Abstract
Abstract In an electric lamp with a sleeve-shaped cap and an inner sleeve carrying the bulb, the cap has at least two lugs protruding inwards and the inner sleeve is provided with at least two slots on its cylindrical sheath, which engage the lugs.
Inventors
- 👤 Paul Hellwig
- 👤 Werner Schlagheck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:06
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/42; H01K1/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
An elongated electric lamp having an axis which comprises: a bulb, a sleeve-shaped cap, and a cylindrical inner sleeve carried in said sleeve-shaped cap, said cylindrical inner sleeve having first and second axial extremities and carrying said bulb at said first axial extremity, said sleeve-shaped cap having at least two lugs extending inwardly, said cylindrical inner sleeve having at least two slots extending in the direction of said lamp axis, said slots opening into said second axial extremity of said inner sleeve and engaging said lugs.
Claim 2
Dependent Claim
86 words
An elongated electric lamp having an axis which comprises: a bulb, a sleeve-shaped cap, and a cylindrical inner sleeve carried in said sleeve-shaped cap, said cylindrical inner sleeve having first and second axial extremities and carrying said bulb at said first axial extremity, said sleeve-shaped cap having at least two lugs extending inwardly, said cylindrical inner sleeve having at least two slots extending in the direction of said lamp axis, said slots opening into said second axial extremity of said inner sleeve and engaging said lugs.
Claim 3
Dependent Claim
26 words
A lamp as claimed in claim 1, wherein said lugs are formed in the shape of protrusions pushed inwards from the metal wall of the cap.
Claim 4
Dependent Claim
28 words
A lamp as claimed in claim 1, or 2, wherein said slots are elongated and are wider at said axial extremity than elsewhere along the axial extent thereof.
Claim 5
Dependent Claim
50 words
A lamp as claimed in claim 1 or 2, wherein said slots have resilient edges which are pressed apart by said cap lugs during insertion of said cylindrical inner sleeve into said sleeve-shaped cap, and in the assembled position of said cylindrical inner sleeve are in compression behind said lugs.
Claim 6
Dependent Claim
16 words
A lamp as claimed in claim 4, in which said resilient edges which are bent inwardly.
Claim 7
Dependent Claim
27 words
A lamp as claimed in claim 4, wherein said slots are elongated and are wider at said second axial extremity than elsewhere along the axial extent thereof.
References Cited (Backward Citations)
US2692154A
Cited
US3173735A
Cited
US3262001A
Cited
US4013335A
Cited
US4119877A
Cited
US4122367A
Cited
US4295076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |