US4597035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp structure
Assignee: Individual
•
Filing: 1984-04-12
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Granted: 1986-06-24
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Expires: 2004-04-12
Abstract
Abstract A lamp structure and, more specially, a strip lighting fixture has an outer casing tube with a slot running between its ends and at least two double-ended lamps or bulbs placed within it and joined up electrically in series with a current supply, the bulbs being kept electrically in contact by one or more springs acting axially thereon.
Inventors
- 👤 Horst Lettenmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:51
CPC Classifications
F; F21; F21V; F21V19/00; F21V19/0075; F21V19/008; F21V19/0085; F21S; F21S4/00; F21S4/20; F21W; F21W2131/00; F21W2131/30; F21W2131/304; F21W2131/40; F21W2131/405
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
185 words
A light fixture having at least two tubular lamps as light sources serially arranged one behind the other in a light pipe, wherein between each two opposing contact ends of the tubular lamps electrically conducting compression springs are arranged, characterized in that a compression spring (5) is in contact with the outer, electrically conductive contact ends (4) of the outermost light tubes (2), the other ends of the compression springs being supported by the body (6) of the light fixture, in that electrically non-conductive sleeves (9) are disposed about cylindrical peripheral surfaces (8) of the contact ends (4) of the tubular lamps (2), the sleeves (9) being movable axially relative to the tube (3) and the surfaces (8) of the tubular lamps (2), which sleeves serve to maintain the spacing and symmetry, in that the light pipe (3) has at least one longitudinally extending light discharge slot (10), and in that the ends of the light pipe (3) are mounted in the light fixture body (6) so that it is rotatable about its longitudinal axis for changing the orientation of the light discharge slot (10).
Claim 2
Dependent Claim
185 words
A light fixture having at least two tubular lamps as light sources serially arranged one behind the other in a light pipe, wherein between each two opposing contact ends of the tubular lamps electrically conducting compression springs are arranged, characterized in that a compression spring (5) is in contact with the outer, electrically conductive contact ends (4) of the outermost light tubes (2), the other ends of the compression springs being supported by the body (6) of the light fixture, in that electrically non-conductive sleeves (9) are disposed about cylindrical peripheral surfaces (8) of the contact ends (4) of the tubular lamps (2), the sleeves (9) being movable axially relative to the tube (3) and the surfaces (8) of the tubular lamps (2), which sleeves serve to maintain the spacing and symmetry, in that the light pipe (3) has at least one longitudinally extending light discharge slot (10), and in that the ends of the light pipe (3) are mounted in the light fixture body (6) so that it is rotatable about its longitudinal axis for changing the orientation of the light discharge slot (10).
Claim 3
Dependent Claim
121 words
A lamp structure comprising: a pair of casing supports; an opaque casing tube rotatably disposed between said supports, and having a lengthwise light outlet slot; at least two double-ended tubular incandescent lamps disposed with said tube; at least one compression spring, one end being in contact with a lamp end adjacent a casing support and a second end being in contact with the casing support; and an electrically insulating centering sleeve, within and in contact with said tube, disposed around adjacent ends of said at least two lamps, the centering sleeve sized to substantially cover said adjacent ends and to center the lamp ends with said tube, the centering sleeve movable axially relative to the tube and to the lamp ends.
Claim 4
Dependent Claim
121 words
A lamp structure comprising: a pair of casing supports; an opaque casing tube rotatably disposed between said supports, and having a lengthwise light outlet slot; at least two double-ended tubular incandescent lamps disposed with said tube; at least one compression spring, one end being in contact with a lamp end adjacent a casing support and a second end being in contact with the casing support; and an electrically insulating centering sleeve, within and in contact with said tube, disposed around adjacent ends of said at least two lamps, the centering sleeve sized to substantially cover said adjacent ends and to center the lamp ends with said tube, the centering sleeve movable axially relative to the tube and to the lamp ends.
Claim 5
Dependent Claim
25 words
The lamp structure of claim 2 further comprising a further compression spring placed between and in electrical contact with adjacent ends of two said lamps.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |