US3784836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ir generator having ellipsoidal and paraboloidal reflectors
Assignee: Fife Corp
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Filing: 1972-10-06
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Granted: 1974-01-08
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Expires: 1992-10-06
Abstract
Abstract An infrared generator wherein an ellipsoidal reflector has a source rich in infra red at one focus thereof. The end of the reflector at the other focus merges with a paraboloidal reflector positioned so that the focus of the latter reflector coincides with the said other focus of the former. A second ellipsoidal reflector may be inserted between the former said reflectors with one of its foci coinciding with the said other focus of the former said ellipsoidal reflector, and its other focus coinciding with the focus of the paraboloidal reflector. The axes of the reflectors are coincident, and a lens and plug or equivalent may be provided to recover radiation that might otherwise be lost.
Inventors
- 👤 P Tolliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:32
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21V7/09; G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; G01J3/108; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/255
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
132 words
In an IR generator, the combination of an ellipsoidal shell having an IR source at one focus thereof, said ellipsoidal shell lacking a minor portion of the end thereof at the other focus thereof, whereby to define an opening in said ellipsoidal shell; and a paraboloidal shell having its focus substantially coincident with said other focus of said ellipsoidal shell, said paraboloidal shell lacking a portion at the end thereof corresponding to the focus thereof; whereby to define an opening in said paraboloidal shell; said shells being joined together so that the said openings are substantially coincident, both said interior surfaces being reflective with respect to the radiation from said source; and whereby the IR radiation is collected by the ellipsoidal shell and the collected radiation is collimated by the paraboloidal shell.
Claim 2
Dependent Claim
132 words
In an IR generator, the combination of an ellipsoidal shell having an IR source at one focus thereof, said ellipsoidal shell lacking a minor portion of the end thereof at the other focus thereof, whereby to define an opening in said ellipsoidal shell; and a paraboloidal shell having its focus substantially coincident with said other focus of said ellipsoidal shell, said paraboloidal shell lacking a portion at the end thereof corresponding to the focus thereof; whereby to define an opening in said paraboloidal shell; said shells being joined together so that the said openings are substantially coincident, both said interior surfaces being reflective with respect to the radiation from said source; and whereby the IR radiation is collected by the ellipsoidal shell and the collected radiation is collimated by the paraboloidal shell.
Claim 3
Dependent Claim
10 words
The invention of claim 1, wherein said openings are circular.
Claim 4
Dependent Claim
40 words
The invention of claim 1, wherein the first said opening is in a plane perpendicular to the major axis of said ellipsoidal shell, and the second said opening is in a plane perpendicular to the axis of said paraboloidal shell.
Claim 5
Dependent Claim
54 words
The invention of claim 1, including a plug in the form of the reflective end of a hyperboloidal shell, wherein the point of intersection of said end with the axis of said hyperboloidal shell is coincident with the focus of said paraboloidal shell, and the axes of said paraboloidal and hyperboloidal shells are coincident.
Claim 6
Dependent Claim
101 words
The invention of claim 1, including a second ellipsoidal shell having one of its foci coincident with the first said focus of the first said ellipsoidal shell, said second ellipsoidal shell having a radiation source at its other focus, the first said radiation source being the image of the second said radiation source; the major axes of said ellipsoidal shells being coaxial, so that said ellipsoidal shells intersect in a common plane, and each thereof lacking the lesser part of itself sub-tended by said plane, and the internal surface of said second ellipsoidal shell being reflective with respect to said radiation.
Claim 7
Dependent Claim
46 words
The invention of claim 5, including a lens between the foci of said second ellipsoidal shell for focussing a solid angle element of radiation from the second said source on the first said source of radiation, said solid angle being that sub-tended by the said openings.
Claim 8
Dependent Claim
55 words
The invention of claim 5, including a plug in the form of the small end of a hyperboloidal shell, wherein the point of intersection of said small end with the axis of said hyperboloidal shell is coincident with the focus of said paraboloidal shell, and the axes of said paraboloidal and hyperboloidal shells are coincident.
Claim 9
Dependent Claim
31 words
The invention of claim 5, wherein the said first said ellipsoidal shell has major and minor axes which are shorter than the major and minor axes of said second ellipsoidal shell.
Claim 10
Dependent Claim
70 words
The invention of claim 1, including a diverging lens at the coincidence of said openings, said diverging lens being responsive to radiation from said source in a given solid angle to redirect the last said radiation onto the said internal surface of said paraboloidal shell, as if said last said radiation were emanating from the said focus of said paraboloidal shell; said solid angle being that subtended by said openings.
Claim 11
Dependent Claim
109 words
In an IR generator, the combination of an ellipsoidal shell and a paraboloidal shell, each having a reflecting inner surface, and said ellipsoidal shell having an IR source at one focus thereof; said shells being secured together with the other focus of said ellipsoidal shell coincident with the focus of said paraboloidal shell; said shells lacking portions adjacent where they are secured together, said portions being such as would, by their presence, substantially prevent IR going from said one focus to said inner surface of said paraboloidal shell; and whereby the IR radiation is collected by the ellipsoidal shell and the collected radiation is collimated by the paraboloidal shell.
Claim 12
Dependent Claim
109 words
In an IR generator, the combination of an ellipsoidal shell and a paraboloidal shell, each having a reflecting inner surface, and said ellipsoidal shell having an IR source at one focus thereof; said shells being secured together with the other focus of said ellipsoidal shell coincident with the focus of said paraboloidal shell; said shells lacking portions adjacent where they are secured together, said portions being such as would, by their presence, substantially prevent IR going from said one focus to said inner surface of said paraboloidal shell; and whereby the IR radiation is collected by the ellipsoidal shell and the collected radiation is collimated by the paraboloidal shell.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |