US4000407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined infrared filter and light focusing apparatus for a mercury vapor lamp
Assignee: ILLUMINATION IND Inc
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Filing: 1975-04-07
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Granted: 1976-12-28
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Expires: 1995-04-07
Abstract
Abstract One or more hollow, light transparent elements filled with a liquid coolant-filter are interposed between a high intensity mercury vapor lamp and an object to be illuminated in order to simultaneously filter out infrared radiation and focus the illumination from the lamp. In two embodiments the light transparent elements include two hollow quartz tubes which, in the first embodiment, are parallel to each other and to the lamp and in the second embodiment surround the lamp but are separated from it by an annular air space. In a third embodiment the light transparent elements include a hollow, rectangular, quartz box, for containing the liquid coolant-filter, and a Fresnel lens affixed to the underside of the box for focusing the light.
Inventors
- 👤 Charles H. Keller
- 👤 Patrick O. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:03
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/04; B; B41; B41F; B41F23/00; B41F23/04; B41F23/0403; B41F23/0406; B41F23/0409; F21V29/00; F21V29/50; F21V29/56; F21V29/59; F21V7/00; F21V7/04; F21V9/00; F21V9/04; F21V9/08; F21V9/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
105 words
Apparatus for filtering and focusing light directed from a high intensity light source toward an object comprising a reflector partially surrounding the light source on its side opposite to the object, means for filtering infrared radiation from the illumination and simultaneously refracting the illumination towards the object to be illuminated, the means for filtering and refracting including a liquid coolant-filter, hollow, transparent means, including a plurality of transparent, elongated hollow tubes aligned parallel to the length of the light source, interposed between the light source and the object for containing the liquid coolant-filter, and means for circulating the liquid coolant-filter in the hollow, transparent means.
Claim 2
Dependent Claim
105 words
Apparatus for filtering and focusing light directed from a high intensity light source toward an object comprising a reflector partially surrounding the light source on its side opposite to the object, means for filtering infrared radiation from the illumination and simultaneously refracting the illumination towards the object to be illuminated, the means for filtering and refracting including a liquid coolant-filter, hollow, transparent means, including a plurality of transparent, elongated hollow tubes aligned parallel to the length of the light source, interposed between the light source and the object for containing the liquid coolant-filter, and means for circulating the liquid coolant-filter in the hollow, transparent means.
Claim 3
Dependent Claim
25 words
Apparatus as recited in claim 1 wherein the reflector means are hollow and further including means for circulating a liquid coolant through the hollow reflector.
Claim 4
Dependent Claim
14 words
Apparatus as recited in claim 1 wherein the reflector is cardioid in cross-sectional shape.
Claim 5
Dependent Claim
12 words
Apparatus as recited in claim 1 wherein the liquid coolant-filter comprises water.
Claim 6
Dependent Claim
14 words
Apparatus as recited in claim 1 wherein the liquid coolant-filter comprises aqueous copper sulfate.
Claim 7
Dependent Claim
52 words
Apparatus as recited in claim 1 wherein the hollow, transparent means comprise a hollow, rectangularly shaped box of light transparent material for containing the liquid coolant-filter and lens means adjacent to the box and positioned between the object and the box for focusing the light passing through the box toward the object.
Claim 8
Dependent Claim
14 words
Apparatus as recited in claim 6 wherein the lens means comprise a Fresnel lens.
Claim 9
Dependent Claim
72 words
Apparatus as recited in claim 7 wherein at least a portion of the reflector means is elliptical in cross-section and is situated with the light source interposed between the object and the elliptical portion of the reflector means, the vertex of the elliptical portion, the longitudinal axis of the lamp and the center of the Fresnel lens are aligned along a hypothetical axis which is perpendicular to the object to be illuminated.
Claim 10
Dependent Claim
184 words
Apparatus for filtering and focusing light directed from a high intensity light source toward an object comprising a reflector partially surrounding the light source on its side opposite to the object, means for filtering infrared radiation from the illumination and simultaneously refracting the illumination towards the object to be illuminated, the means for filtering and refracting including a liquid coolant-filter, hollow, transparent means interposed between the light source and the object for containing the liquid coolant-filter, the hollow, transparent means including a pair of inner and outer, hollow, transparent tubes, the inner tube surrounding the light source and the outer tube surrounding the inner tube, the inner and outer tubes having internal diameters greater than the diameter of the light source and being spaced apart from the light source so as to define an air containing space therebetween, the internal diameter of the outer tube being greater than the external diameter of the inner tube so as to define an elongated annular space therebetween for containing the liquid coolant-filter, and means for circulating the liquid coolant-filter over the length of the elongated annular space.
Claim 11
Dependent Claim
184 words
Apparatus for filtering and focusing light directed from a high intensity light source toward an object comprising a reflector partially surrounding the light source on its side opposite to the object, means for filtering infrared radiation from the illumination and simultaneously refracting the illumination towards the object to be illuminated, the means for filtering and refracting including a liquid coolant-filter, hollow, transparent means interposed between the light source and the object for containing the liquid coolant-filter, the hollow, transparent means including a pair of inner and outer, hollow, transparent tubes, the inner tube surrounding the light source and the outer tube surrounding the inner tube, the inner and outer tubes having internal diameters greater than the diameter of the light source and being spaced apart from the light source so as to define an air containing space therebetween, the internal diameter of the outer tube being greater than the external diameter of the inner tube so as to define an elongated annular space therebetween for containing the liquid coolant-filter, and means for circulating the liquid coolant-filter over the length of the elongated annular space.
Claim 12
Dependent Claim
35 words
Apparatus as recited in claim 9 wherein the light source is elongated and at least one of the inner and outer tubes has a separate longitudinal axis from the longitudinal axis of the light source.
Claim 13
Dependent Claim
25 words
Apparatus as recited in claim 9 wherein the reflector means are hollow and further including means for circulating a liquid coolant through the hollow reflector.
Claim 14
Dependent Claim
14 words
Apparatus as recited in claim 9 wherein the reflector is cardioid in cross-sectional shape.
Claim 15
Dependent Claim
12 words
Apparatus as recited in cliam 9 wherein the liquid coolant-filter comprises water.
Claim 16
Dependent Claim
12 words
Apparatus as recited in cliam 9 wherein the liquid coolant-filter comprises water.
Claim 17
Dependent Claim
14 words
Apparatus as recited in claim 9 wherein the liquid coolant-filter comprises aqueous copper sulfate.
Claim 18
Dependent Claim
52 words
Apparatus as recited in claim 9 wherein the hollow, transparent means comprise a hollow, rectangularly shaped box of light transparent material for containing the liquid coolant-filter and lens means adjacent to the box and positioned between the object and the box for focusing the light passing through the box toward the object.
Claim 19
Dependent Claim
14 words
Apparatus as recited in claim 15 wherein the lens means comprise a Fresnel lens.
Claim 20
Dependent Claim
72 words
Apparatus as recited in claim 16 wherein at least a portion of the reflector means is elliptical in cross-section and is situated with the light source interposed between the object and the elliptical portion of the reflector means, the vertex of the elliptical portion, the longitudinal axis of the lamp and the center of the Fresnel lens are aligned along a hypothetical axis which is perpendicular to the object to be illuminated.
References Cited (Backward Citations)
US1435193A
Cited
US2380682A
Cited
US1457646A
Cited
US1630056A
Cited
US1680583A
Cited
US1895887A
Cited
US3766377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |