US3602755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
U-shaped fluorescent lamp with improved envelope-bracing means
Assignee: Philips North America LLC
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Filing: 1970-01-21
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Granted: 1971-08-31
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Expires: 1990-01-21
Abstract
Abstract The leg portions of a U-shaped fluorescent lamp are joined together and reinforced by a rigid wire harness that extends into and is interlocked with the base members secured to the ends of the envelope. The harness passes through openings in the base collars and has arcuate end segments that are seated within the base cavities and are held in such position by the base collars and the basing cement. Flexing of the envelope legs and the potential risk of lamp breakage during handling and installation of the lamp in its fixture are thus eliminated.
Inventors
- 👤 Frederick W Hoeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:47
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/32; H01J61/325
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
In combination with a fluorescent lamp having a U-shaped vitreous envelope, means for reinforcing and locking the leg portions of said envelope in predetermined spaced-apart relationship comprising; a pair of hollow base members secured to the respective ends of said envelope leg portions and having side and end walls which define a base cavity at each end of the lamp, and a rigid elongated member joining said envelope leg portions and having end segments that extend through openings in the walls of the respective base members into said base cavities and are in interlocked relationship with the interior surfaces of said base members.
Claim 2
Dependent Claim
103 words
In combination with a fluorescent lamp having a U-shaped vitreous envelope, means for reinforcing and locking the leg portions of said envelope in predetermined spaced-apart relationship comprising; a pair of hollow base members secured to the respective ends of said envelope leg portions and having side and end walls which define a base cavity at each end of the lamp, and a rigid elongated member joining said envelope leg portions and having end segments that extend through openings in the walls of the respective base members into said base cavities and are in interlocked relationship with the interior surfaces of said base members.
Claim 3
Dependent Claim
56 words
The U-shaped fluorescent lamp of claim 1 wherein; each of said base members are fastened to the respective ends of said envelope leg portions by a body of cured cement, and portions of the interlocked end segments of said rigid elongated member are joined to the respective base members by the associated body of cured cement.
Claim 4
Dependent Claim
90 words
The U-shaped fluorescent lamp of claim 2 wherein; the ends of said envelope leg portions are of substantially circular cross section, the sidewalls of each of said base members comprise a cylindrical collar that encircles the adjoined end of the associated envelope leg portion, said body of cured cement extends around the inner periphery of the respective base collars, and said rigid elongated member comprises a wire harness having arcuate end segments that span diametrically-opposed parts of the respective base collars and are joined to said collars by said cement.
Claim 5
Dependent Claim
40 words
The U-shaped fluorescent lamp of claim 3 wherein the maximum width dimensions of said arcuate enD segments are smaller than the inside diameter of the respective base collars and parts of said end segments are spaced inwardly from the collars.
Claim 6
Dependent Claim
45 words
The U-shaped fluorescent lamp of claim 4 wherein; said wire harness has a substantially straight medial segment and semicircular end segments that are disposed in a common plane, and said wire harness extends through substantially aligned apertures in the collars of the respective base members.
Claim 7
Dependent Claim
59 words
The U-shaped fluorescent lamp of claim 4 wherein; said wire harness has a substantially straight medial segment and circular end segments that are disposed in a common plane, and said wire harness extends through substantially aligned slots in the collars of the respective base members that extend from the collar peripheries toward the end walls of said base members.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |