US3654451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floodlight
Assignee: American Electric Manufacturing Corp
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Filing: 1969-09-18
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Granted: 1972-04-04
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Expires: 1989-09-18
Abstract
Abstract A floodlight for providing a high efficiency rectangular beam of light having a narrow beam in the vertical dimension. The floodlight includes a vertically elongated light source, a reflector spaced behind and to the opposite sides of the light source, and a sleevelike refractor or Fresnel lens around the light source for refracting the rays of light from the light source into horizontal rays of light to provide the substantially rectangular beam of light. In a modified arrangement, there is provided an auxiliary reflector for reflecting the upwardly and downwardly emitted rays from the light source into substantially horizontally extending rays of light. Also, there is included an alternate embodiment in which the glass envelope of the lamp of which the light source is a part is formed into a condensing lens instead of having a separate Fresnel lens. In addition, there is included another embodiment in which the refractor is provided in the interior thereof with a plurality of vertical prisms, with a part of the prisms refracting the light rearwardly onto a reflector for reflection into a center portion of the beam pattern and with the remaining part of the prisms refracting the light to either side of the center portion of the beam pattern.
Inventors
- 👤 George N Starr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:34
CPC Classifications
F; F21; F21V; F21V13/00; F21V13/02; F21V13/04; F21V5/00; F21V5/04; F21V5/046
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A floodlight for providing a substantially rectangular beam comprising a reflector means spaced behind said light source and having substantially straight walls in vertical section, and condensing lens means disposed in a 360* ARC around said light source in concentric relationship therewith and interposed between said light source and said reflector means with said light source being disposed medially of said condensing lens means for causing the rays from said light source passing through said lens means to be refracted substantially perpendicular to said vertically elongated light source and substantially parallel with one another as considered along vertical planes through said floodlight and to be reflected from said reflector means in a substantially rectangular beam wider than said reflector means.
Claim 2
Dependent Claim
120 words
A floodlight for providing a substantially rectangular beam comprising a reflector means spaced behind said light source and having substantially straight walls in vertical section, and condensing lens means disposed in a 360* ARC around said light source in concentric relationship therewith and interposed between said light source and said reflector means with said light source being disposed medially of said condensing lens means for causing the rays from said light source passing through said lens means to be refracted substantially perpendicular to said vertically elongated light source and substantially parallel with one another as considered along vertical planes through said floodlight and to be reflected from said reflector means in a substantially rectangular beam wider than said reflector means.
Claim 3
Dependent Claim
34 words
The floodlight of claim 1 in which upper and lower auxiliary reflector means are provided for reflecting the upwardly and downwardly emitted rays from said light source into substantially horizontally extending rays of light.
Claim 4
Dependent Claim
29 words
The floodlight of claim 1 in which said lamp includes an outer transparent envelope and in which said lens means is integrally provided as a part of said envelope.
Claim 5
Dependent Claim
69 words
The floodlight of claim 1 in which said reflector means comprises a pair of similar segments symmetrically arranged with respect to said source of light and with the segments meeting along an edge directly behind said light source and providing reflecting curved surfaces to cause the rays of light from said lens means that are reflected by said reflector means to miss said light source and said lens means.
Claim 6
Dependent Claim
117 words
A floodlight for providing a substantially rectangular beam cOmprising a lamp including an elongated light source emitting rays of light therefrom, lens means revolved around an imaginary axis and concentrically disposed 360* around said light source for refracting said rays of light from said light source into rays of light substantially perpendicular to said axis, said light source being disposed medially of said condensing lens means, reflector means substantially parallel with said light source and disposed in spaced relationship to said lens means and around a portion thereof for reflecting a portion of the refracted rays of light to provide with the unreflected ones of the refracted rays a substantially rectangular beam wider than said reflector means.
Claim 7
Dependent Claim
117 words
A floodlight for providing a substantially rectangular beam cOmprising a lamp including an elongated light source emitting rays of light therefrom, lens means revolved around an imaginary axis and concentrically disposed 360* around said light source for refracting said rays of light from said light source into rays of light substantially perpendicular to said axis, said light source being disposed medially of said condensing lens means, reflector means substantially parallel with said light source and disposed in spaced relationship to said lens means and around a portion thereof for reflecting a portion of the refracted rays of light to provide with the unreflected ones of the refracted rays a substantially rectangular beam wider than said reflector means.
Claim 8
Dependent Claim
34 words
The floodlight of claim 5 in which upper and lower auxiliary reflector means are provided for reflecting the upper and downwardly emitted rays from said light source into substantially horizontally extending rays of light.
Claim 9
Dependent Claim
28 words
The floodlight of claim 5 which said lamp includes an outer transparent envelope and in which said lens means is integrally provided as a part of said envelope.
Claim 10
Dependent Claim
216 words
A floodlight for providing a substantially rectangular light beam pattern as considered relative to a vertical plane spaced in front of said floodlight, said floodlight comprising a light source emitting rays of light therefrom in substantially all directions including substantially a 360* arc as considered relative to horizontal planes through said floodlight, reflector means spaced behind said light source and having substantially straight walls in vertical section, and refractor means disposed around said light source in substantially a 360* arc including a major sector and a minor sector, said reflector being positioned with respect to said refractor so that only rays of light from said source passing through said minor sector strike said reflector, said refractor means including condensing lens means in said major and minor sectors, said condensing lens means in said minor sector being interposed between said light source and said reflector means for causing the rays of light from said light source passing through said condensing lens means in said minor sector to be reflected by said reflector means substantially parallel with one another and substantially parallel with the unreflected rays passing through said condensing lens means in said major sector as considered in vertical planes through said floodlight and to establish with the unreflected rays a beam having a narrow vertical spread.
Claim 11
Dependent Claim
216 words
A floodlight for providing a substantially rectangular light beam pattern as considered relative to a vertical plane spaced in front of said floodlight, said floodlight comprising a light source emitting rays of light therefrom in substantially all directions including substantially a 360* arc as considered relative to horizontal planes through said floodlight, reflector means spaced behind said light source and having substantially straight walls in vertical section, and refractor means disposed around said light source in substantially a 360* arc including a major sector and a minor sector, said reflector being positioned with respect to said refractor so that only rays of light from said source passing through said minor sector strike said reflector, said refractor means including condensing lens means in said major and minor sectors, said condensing lens means in said minor sector being interposed between said light source and said reflector means for causing the rays of light from said light source passing through said condensing lens means in said minor sector to be reflected by said reflector means substantially parallel with one another and substantially parallel with the unreflected rays passing through said condensing lens means in said major sector as considered in vertical planes through said floodlight and to establish with the unreflected rays a beam having a narrow vertical spread.
Claim 12
Dependent Claim
60 words
The floodlight of claim 8 in which said refractor means includes vertical prisms in at least a portion of the interior thereof and said reflector means includes curved portions when considered relative to horizontal planes through said floodlight for reflecting the rays of light passing through said vertical prisms into at least a portion of said rectangular light beam pattern.
Claim 13
Dependent Claim
45 words
The floodlight of claim 9 in which said refractor means includes vertical prisms in substantially the remaining portions of the interior thereof for refracting the unreflected rays of light from said light source passing therethrough into the remaining portions of said rectangular light beam pattern.
Claim 14
Dependent Claim
100 words
The floodlight of claim 8 in which said refractor means includes vertical prisms in said minor sector and said reflector means includes curved portions when considered relative to horizontal planes passing through said floodlight for reflecting the rays of light passing through said vertical prisms in said minor sector to either side of said refractor means and into the central portion of said rectangular light beam pattern, and said refractor means includes vertical prisms in said major sector for refracting the unreflected rays of light from said light source passing therethrough into lateral portions of said rectangular light beam pattern.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |