US4447861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular fluorescent lamp unit
Assignee: General Electric Co
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Filing: 1981-12-21
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Granted: 1984-05-08
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Expires: 2001-12-21
Abstract
Abstract A circular fluorescent lamp unit having a central screw-in hub containing lamp ballast means, and a plurality of support arms extending from the hub and having curved outer ends to support a circular lamp. The support arms are metal or plastic strips which enter through slots of the hub and are bent at substantially right angles within the hub so as to be held in place while having limited radial movement with respect to the hub to enable them to accommodate and support circular lamp bulbs of varying dimensions such as due to manufacturing tolerance variations.
Inventors
- 👤 Frederick Hetzel
- 👤 Martin J. Graf
- 👤 Douglas Seredich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:05
CPC Classifications
F; F21; F21V; F21V19/00; F21V19/0075; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/33
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
133 words
A circular fluorescent lamp unit comprising a central hub containing lamp ballast means, a plurality of support arms extending radially from said hub and adapted to hold a circular fluorescent lamp in a position surrounding said hub, at least one of said support arms comprising a sheet member extending through a support arm slot in said hub and having a substantially right-angle bend within said hub to form an inner length thereof within said hub which extends substantially parallel to the hub axis, and said hub further comprising receptacle means for securing said sheet member at the end region of said inner length spaced from said right-angle bend to provide means causing one or more of said support arms to have a limited amount of radial sliding movement with respect to said hub.
Claim 2
Dependent Claim
133 words
A circular fluorescent lamp unit comprising a central hub containing lamp ballast means, a plurality of support arms extending radially from said hub and adapted to hold a circular fluorescent lamp in a position surrounding said hub, at least one of said support arms comprising a sheet member extending through a support arm slot in said hub and having a substantially right-angle bend within said hub to form an inner length thereof within said hub which extends substantially parallel to the hub axis, and said hub further comprising receptacle means for securing said sheet member at the end region of said inner length spaced from said right-angle bend to provide means causing one or more of said support arms to have a limited amount of radial sliding movement with respect to said hub.
Claim 3
Dependent Claim
81 words
A lamp unit as claimed in claim 1, in which said hub comprises two parts joined together at rims thereof, said hub having a respective support arm slot disposed at the rim of one of said hub parts for each respective one of said support arms, and each of said support arms has an inner length extending into said one hub part, said receptacle means comprising means for receiving the respective end regions of said inner lengths of the support arms.
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) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |