Patent US4042290A successfully refreshed from Google Patents.
US4042290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting device
Assignee: ANETA BELYSNING AB
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Filing: 1976-03-24
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Granted: 1977-08-16
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Expires: 1996-03-24
Abstract
Abstract An illuminating device contains an elongated support having a U-shaped cross section. Tubular incandescent lamps are provided inside said support. Each lamp is carried by two lamp holders. The support consists of two metallic sections, each having an L-shaped cross section. The two sections are insulated from each other and are connected to the terminals of a low voltage electric supply.
Inventors
- 👤 Georg Czitrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:48
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/02; F; F21; F21V; F21V19/00; F21V19/0075; F21V19/008; F21V19/0085; F21V21/00; F21V21/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
Lighting device comprising an elongated support having a generally U-shaped cross-section, said support including electrically conductive surfaces extending respectively along the inside of the legs of said support, a pair of lamp holders made from an electrically insulating material displaceably arranged with respect to each other in said support, co-engaging releaseable means on said support and lamp holders for retaining said lamp holders in said support, an incandescent lamp of the type comprising a tubular section and an electrically conductive cap at each end thereof having a cylindrical section, each said cylindrical section being received in a corresponding one of said pair of lamp holders, and a contact spring on each said lamp holder connecting one cylindrical section of an end cap on said lamp with a corresponding one of said conductive surfaces extending along the inside of said support.
Claim 2
Dependent Claim
140 words
Lighting device comprising an elongated support having a generally U-shaped cross-section, said support including electrically conductive surfaces extending respectively along the inside of the legs of said support, a pair of lamp holders made from an electrically insulating material displaceably arranged with respect to each other in said support, co-engaging releaseable means on said support and lamp holders for retaining said lamp holders in said support, an incandescent lamp of the type comprising a tubular section and an electrically conductive cap at each end thereof having a cylindrical section, each said cylindrical section being received in a corresponding one of said pair of lamp holders, and a contact spring on each said lamp holder connecting one cylindrical section of an end cap on said lamp with a corresponding one of said conductive surfaces extending along the inside of said support.
Claim 3
Dependent Claim
45 words
A lighting device as defined in claim 1 wherein said lamp holder which is made from a plastic material has a substantially U-shaped cross-section and is provided with a resilient wall section which engages and retains the end cap of said lamp in said holder.
Claim 4
Dependent Claim
45 words
A lighting device as defined in claim 1 wherein said co-engaging releaseable means on said support and lamp holders for retaining said lamp holders in said support comprise outwardly directed protruding portions on said lamp holders which engage inwardly directed protruding portions on said support.
Claim 5
Dependent Claim
104 words
Lighting device comprising an elongated support having a generally U-shaped cross-section and which is constituted by two interconnected L-shaped members made from an electrically conductive metallic material, longitudinally spaced lamp holders supported between two of the legs of said L-shaped members and the other two legs being arranged in an overlapping spaced relationship and joined to each other by means of spaced electrically insulating spacer members located therebetween, an incandescent lamp comprising a tubular section and electrically conductive end caps mounted on said lamp holders, and means establishing an electrical connection between each said end cap on said lamp and a corresponding L-shaped member.
Claim 6
Dependent Claim
104 words
Lighting device comprising an elongated support having a generally U-shaped cross-section and which is constituted by two interconnected L-shaped members made from an electrically conductive metallic material, longitudinally spaced lamp holders supported between two of the legs of said L-shaped members and the other two legs being arranged in an overlapping spaced relationship and joined to each other by means of spaced electrically insulating spacer members located therebetween, an incandescent lamp comprising a tubular section and electrically conductive end caps mounted on said lamp holders, and means establishing an electrical connection between each said end cap on said lamp and a corresponding L-shaped member.
Claim 7
Dependent Claim
30 words
A lighting device as defined in claim 4 wherein said spacers are constituted by plastic discs having raised sections fitting into apertures with obliquely bevelled edges in said overlapping legs.
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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |