US4093974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Florescent light fixture
Assignee: Individual
•
Filing: 1976-10-01
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Granted: 1978-06-06
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Expires: 1996-10-01
Abstract
Abstract A light fixture for florescent tubes designed to be mounted in incandescent light bulb sockets. This fixture is particularly adapted for replacing incandescent down-lights mounted in ceilings. A standard plug is positioned at one end of an extensible member while a transformer box and backing plate are attached at the other end of the extensible member. The extensible member includes telescoping tubes of square cross-section.
Inventors
- 👤 Kenneth A. Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:44
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/02; F21V21/04; F21V19/00; F21V19/0075; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/33
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
A florescent light fixture for installation in a mounting for incandescent bulbs, comprising a plug of capable of mating with a standard light socket for incandescent bulbs; a transformer box; a backing plate including a coupling for a florescent light, said backing plate being mounted to said transformer box; and an extensible member including a first shaft and a second shaft, one of said shafts extending into the other of said shafts and being resistively extensible in an axial direction with respect thereto, said plug being mounted at a first end of said extensible member to one end of first shaft and said transformer box being mounted at a second end of said extensible member to one end of said second shaft, said first shaft being rigidly constrained from rotation relative to said second shaft.
Claim 2
Dependent Claim
135 words
A florescent light fixture for installation in a mounting for incandescent bulbs, comprising a plug of capable of mating with a standard light socket for incandescent bulbs; a transformer box; a backing plate including a coupling for a florescent light, said backing plate being mounted to said transformer box; and an extensible member including a first shaft and a second shaft, one of said shafts extending into the other of said shafts and being resistively extensible in an axial direction with respect thereto, said plug being mounted at a first end of said extensible member to one end of first shaft and said transformer box being mounted at a second end of said extensible member to one end of said second shaft, said first shaft being rigidly constrained from rotation relative to said second shaft.
Claim 3
Dependent Claim
18 words
The fixture of claim 1 wherein said backing plate includes brackets adapted to receive a toroidal florescent bulb.
Claim 4
Dependent Claim
35 words
The fixture of claim 1 wherein said first and second shafts are tubes of square cross-section and said extensible member includes a spring positioned between said first and second shafts to resist axial movement therebetween.
Claim 5
Dependent Claim
38 words
The fixture of claim 3 wherein one of said shafts includes a stop extending therefrom and said spring is positioned on the other of said shafts to interfere with said stop to limit extension of said extensible member.
References Cited (Backward Citations)
US2943238A
Cited
US3742208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |