US4745323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact fluorescent lamp with outer envelope
Assignee: Duro Test Corp
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Filing: 1986-02-26
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Granted: 1988-05-17
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Expires: 2006-02-26
Abstract
Abstract A compact fluorescent lamp of the twin tube or double twin type which is protected by an outer envelope mounted to the fluorescent lamp or the housing which contains the fluorescent lamp ballast. In a preferred embodiment the outer envelope is in the shape of an incandescent lamp envelope.
Inventors
- 👤 Donald P. Northrop
- 👤 Arpad L. Pirovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:30
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/06; H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/32; H01J61/327; H01J61/34; H01J61/35; H01J61/38; H01J61/40; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
The combination comprising: a self-contained fluorescent lamp unit having terminals thereon for electrical connection to a ballast means, a housing having a wall with an opening therein; electrical circuit ballast means within said housing; means for detachably electrically connecting said lamp unit terminals to said ballast means with the terminals of said lamp unit extending through the opening of said housing wall, an envelope having an open neck portion through which said lamp unit passes into the envelope interior. and adapter means having a lower part for placement over said opening of said housing wall and a portion through which said lamp unit extends into said envelope, said envelope neck portion mechanically coupled to an upper part of said adapter means whereby said envelope and adapter are detachable as an assembly from said housing and said lamp unit is accessible for detachment from said housing.
Claim 2
Dependent Claim
145 words
The combination comprising: a self-contained fluorescent lamp unit having terminals thereon for electrical connection to a ballast means, a housing having a wall with an opening therein; electrical circuit ballast means within said housing; means for detachably electrically connecting said lamp unit terminals to said ballast means with the terminals of said lamp unit extending through the opening of said housing wall, an envelope having an open neck portion through which said lamp unit passes into the envelope interior. and adapter means having a lower part for placement over said opening of said housing wall and a portion through which said lamp unit extends into said envelope, said envelope neck portion mechanically coupled to an upper part of said adapter means whereby said envelope and adapter are detachable as an assembly from said housing and said lamp unit is accessible for detachment from said housing.
Claim 3
Dependent Claim
39 words
The combination of claim 1 further comprising means in said portion of said adapter through which said lamp extends for mechanically coupling said lamp to said adapter whereby said envelope, adapter and lamp can be detached as a unit.
Claim 4
Dependent Claim
17 words
The combination of claim 1 wherein said envelope has the general shape of an incandescent lamp envelope.
Claim 5
Dependent Claim
17 words
The combination of claim 2 wherein said envelope has the general shape of an incandescent lamp envelope.
Claim 6
Dependent Claim
18 words
The combination of claim 1 further comprising an adhesive sealant for mounting said neck portion on said adapter.
Claim 7
Dependent Claim
16 words
The combination of claim 5 wherein said adhesive sealant is resilient to provide shock absorbing properties.
Claim 8
Dependent Claim
28 words
The combination of claim 1 wherein said adapter has a peripheral groove into which the envelope neck fits and a central opening through which the lamp unit passes.
Claim 9
Dependent Claim
20 words
The combination of claim 7 further comprising an adhesive sealant for mounting the neck of said envelope in said groove.
References Cited (Backward Citations)
US4272703A
Cited
JPS5763764A
Cited
US4603277A
Cited
US4524301A
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US4611148A
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USD289553S
Cited
USD289928S
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |