US4254358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent lamp
Assignee: KONDO SYLVANIA KK
•
Filing: 1979-07-03
•
Granted: 1981-03-03
•
Expires: 1999-07-03
Abstract
Abstract An incandescent lamp includes a bulb formed of a light-transmissible material, a stem portion for supporting lead-in wires having a filament, and a connector positioned between the bulb and the stem portion to connect them in a hermetically sealed fashion at opposite ends thereof. Since the stem portion is preformed after which the stem is connected integral with the bulb by the connector, it is possible to position the filament as a light source with high accuracy.
Inventors
- 👤 Sozo Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:26
CPC Classifications
H; H01; H01K; H01K7/00; H01K7/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
An incandescent lamp comprising: a bulb formed of light-transmissible material; a stem portion hermetically supporting lead-in wires having connected to ends thereof a filament; and connector means for connecting said bulb and said stem portion in hermetically sealed fashion, said connector means comprising a member having a first end hermetically joined to said stem portion and a second end having an annular recess receiving an end of said bulb and hermetically joined thereto by fused glass powder substantially filling said annular recess.
Claim 2
Dependent Claim
82 words
An incandescent lamp comprising: a bulb formed of light-transmissible material; a stem portion hermetically supporting lead-in wires having connected to ends thereof a filament; and connector means for connecting said bulb and said stem portion in hermetically sealed fashion, said connector means comprising a member having a first end hermetically joined to said stem portion and a second end having an annular recess receiving an end of said bulb and hermetically joined thereto by fused glass powder substantially filling said annular recess.
Claim 3
Dependent Claim
33 words
A lamp as claimed in claim 1, wherein said stem portion comprises a metal plate having said lead-in wires extending therethrough, and glass beads hermetically sealing said lead-in wires to said metal plate.
Claim 4
Dependent Claim
38 words
A lamp as claimed in claim 1, wherein said stem portion comprises a metal plate, and said first end of said connector means has an outwardly extending flange sealingly connected to a planar surface of said metal plate.
Claim 5
Dependent Claim
34 words
A lamp as claimed in claim 3, wherein said metal plate has thereon a positioning metal plate having an outer periphery dimensioned to receive thereabout and position said first end of said connector means.
Claim 6
Dependent Claim
33 words
A lamp as claimed in claim 3, wherein said metal plate includes a raised central portion having an outer periphery dimensioned to receive thereabout and position said first end of said connector means.
References Cited (Backward Citations)
US2268700A
Cited
US2465084A
Cited
US2556059A
Cited
US2615950A
Cited
US3475641A
Cited
US3676730A
Cited
US4145631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |