Patent US4930055A successfully refreshed from Google Patents.
US4930055A
Expired / Lapsed
US
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Marker lamp with halo effect
Assignee: GEISHA Corp 151 EAST SUNSET ROAD HENDERSON NV 89015 A CORP OF NEVADA
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Filing: 1989-06-10
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Granted: 1990-05-29
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Expires: 2009-06-10
Abstract
Abstract A marker lamp having a transparent cylindrical tube in which are mounted a plurality of incandescent filament-type bulbs spaced along the longitudinal axis of the tube. Either the outer or inner surface of the tube has straight striations or grooves extending longitudinally of the tube. When the bulbs are illuminated, there is formed in the tube a light halo centered on each bulb and lying in a plane perpendicular to the longitudinal axis of the tube.
Inventors
- 👤 Robert A. Swadell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:23
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/08; F21V21/0824; F21S; F21S8/00; F21S8/08; F21S8/081; F21S8/083; F21W; F21W2111/00; F21W2111/02; F21W2131/00; F21W2131/10; Y; Y10; Y10S; Y10S362/00; Y10S362/806
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
77 words
An electric lamp comprising: an elongated transparent tube having a transparent wall; a plurality of incandescent, filament-type bulbs mounted within said tube and spaced substantially along the longitudinal axis thereof; and straight, longitudinally extending striation means, in one of the inner and outer surfaces of said tube, for forming inside said transparent wall, when said bulbs are illuminated, a plurality of corresponding halos centered on the bulbs and lying in respective planes perpendicular to said longitudinal axis.
Claim 2
Dependent Claim
77 words
An electric lamp comprising: an elongated transparent tube having a transparent wall; a plurality of incandescent, filament-type bulbs mounted within said tube and spaced substantially along the longitudinal axis thereof; and straight, longitudinally extending striation means, in one of the inner and outer surfaces of said tube, for forming inside said transparent wall, when said bulbs are illuminated, a plurality of corresponding halos centered on the bulbs and lying in respective planes perpendicular to said longitudinal axis.
Claim 3
Dependent Claim
19 words
An electric lamp as defined in claim 1, wherein said tube is cylindrical and has a circular transverse cross-section.
Claim 4
Dependent Claim
16 words
An electric lamp as defined in claim 1, wherein said tube has a rectangular transverse cross-section.
Claim 5
Dependent Claim
24 words
An electric lamp as defined in claim 1, wherein the striation means comprises a plurality of striations in the inner surface of said tube.
Claim 6
Dependent Claim
24 words
An electric lamp as defined in claim 1, wherein the striation means comprises a plurality of striations in the outer surface of said tube.
Claim 7
Dependent Claim
38 words
An electric lamp as defined in claim 1, comprising additional transparent tubes like said transparent tube, and each containing a plurality of said incandescent filament-type bulbs mounted therein, all of the tubes being arranged around a central reflector.
Claim 8
Independent Claim
138 words
A method of making an electric lamp having: an elongated transparent tube having a transparent wall; at least one incandescent, filament-type bulb mounted within said tube substantially on the longitudinal axis thereof; and straight, longitudinally extending striations, in one of the inner and outer surfaces of said tube, for forming inside said transparent wall, when said bulb is illuminated, a halo centered on the bulb and lying in a plane perpendicular to said longitudinal axis; said method comprising: extruding a clear plastic resin through an extruder to form said tube; roughening a surface of the extruder to form longitudinal striations in a surface of the transparent wall of the tube; and increasing the roughness until the depth of the striations is such as to produce maximum intensity and sharpness of the halo produced when the bulb is illuminated.
Claim 9
Independent Claim
138 words
A method of making an electric lamp having: an elongated transparent tube having a transparent wall; at least one incandescent, filament-type bulb mounted within said tube substantially on the longitudinal axis thereof; and straight, longitudinally extending striations, in one of the inner and outer surfaces of said tube, for forming inside said transparent wall, when said bulb is illuminated, a halo centered on the bulb and lying in a plane perpendicular to said longitudinal axis; said method comprising: extruding a clear plastic resin through an extruder to form said tube; roughening a surface of the extruder to form longitudinal striations in a surface of the transparent wall of the tube; and increasing the roughness until the depth of the striations is such as to produce maximum intensity and sharpness of the halo produced when the bulb is illuminated.
Claim 10
Dependent Claim
25 words
An electric lamp as defined in claim 1, wherein said striation means extends along the full length, and around the entire periphery, of said tube.
Claim 11
Dependent Claim
24 words
An electric lamp as defined in claim 5, wherein said striations extend along the full length, and around the entire periphery, of said tube.
Claim 12
Dependent Claim
24 words
An electric lamp as defined in claim 6, wherein said striations extend along the full length, and around the entire periphery, of said tube.
Claim 13
Dependent Claim
24 words
A method as defined in claim 7, wherein the striations are formed along the full length, and around the entire periphery, of the tube.
References Cited (Backward Citations)
US1149208A
Cited
US1457980A
Cited
US2196214A
Cited
US2764670A
Cited
US3777138A
Cited
US4285032A
Cited
US4345363A
Cited
US4536362A
Cited
US4781880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |