US3634675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-intensity radiation device
Assignee: Unitron International Systems Inc
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Filing: 1969-08-07
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Granted: 1972-01-11
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Expires: 1989-08-07
Abstract
Abstract A compact high-intensity radiation device suitable for use as a light signaling means and for other purposes includes a base, an enclosing envelope mounted on the base and constructed of translucent material together with a cover portion of opaque material mounted atop the envelope to define a housing structure in which a main reflector and a secondary reflector are disposed in coaxial relationship with each other, each of said reflectors having reflecting surfaces of parabolic configuration. A point source of light is mounted at the focus of both the main and secondary reflectors and is surrounded by a hemispherical reflector. All reflectors are supported on the base by means of a plurality of support studs and a cutoff reflector is mounted on the secondary reflector to prevent undesired reflections within a limited segment, the device being generally adapted to direct a cone of light in all remaining horizontal directions and wherein the cone of light may be directed through an angle between a minimum of approximately 2* above horizontal and a maximum of approximately 20* thereabove.
Inventors
- 👤 Andrew Madsen
- 👤 John W Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
A radiation device comprising a continuous 360*-parabolic main reflector having an axis of symmetry in coincidence with the main axis of the device and having a reflecting surface configured so that a cross section of said reflecting surface in any plane in which the main axis of the device lies is part of a parabola with the geometric focal point of said parabola located on the main axis of the device and with the geometric axis of said parabola intersecting the main axis of the device and being angularly disposed with respect to the main axis, a point source of radiation disposed at said focal point, and a secondary reflector comprising a continuous 360*-parabolic reflector having a reflecting surface configured so that a cross section of said reflecting surface in any plane in which the main axis of the device lies is part of a parabola with the geometrical focal point and geometrical axis coincident with the geometrical focal point and axis of said main reflector, said secondary reflector being interposed between said main reflector and said point source of radiation and said secondary reflector having a cutaway center portion.
Claim 2
Dependent Claim
190 words
A radiation device comprising a continuous 360*-parabolic main reflector having an axis of symmetry in coincidence with the main axis of the device and having a reflecting surface configured so that a cross section of said reflecting surface in any plane in which the main axis of the device lies is part of a parabola with the geometric focal point of said parabola located on the main axis of the device and with the geometric axis of said parabola intersecting the main axis of the device and being angularly disposed with respect to the main axis, a point source of radiation disposed at said focal point, and a secondary reflector comprising a continuous 360*-parabolic reflector having a reflecting surface configured so that a cross section of said reflecting surface in any plane in which the main axis of the device lies is part of a parabola with the geometrical focal point and geometrical axis coincident with the geometrical focal point and axis of said main reflector, said secondary reflector being interposed between said main reflector and said point source of radiation and said secondary reflector having a cutaway center portion.
Claim 3
Dependent Claim
36 words
A device according to claim 1 wherein the outer periphery of said secondary reflector is disposed to accommodate reflections from said main reflector in the direction of the axis of its imaginary parabola without interference therewith.
Claim 4
Dependent Claim
46 words
A device according to claim 1 wherein the outer periphery of said secondary reflector is spaced from the axis of the imaginary parabola of said main reflector by a distance substantially equal to the spacing between said center point of said main reflector and said axis.
Claim 5
Dependent Claim
33 words
A device according to claim 1 wherein the outer peripheries of said main and of said secondary reflectors are substantially coincidental along lines which are parallel to the main axis of the device.
Claim 6
Dependent Claim
31 words
A device according to claim 1 wherein a cutoff reflector is secured to said secondary reflector along the inner edge of said reflecting portion and extending through the cutaway portion thereof.
Claim 7
Dependent Claim
26 words
A device according to claim 5 wherein said cutoff reflector is of generally arcuate configuration in a plane parallel to the main axis of the device.
Claim 8
Dependent Claim
106 words
A radiation device comprising a continuous 360*-parabolic main reflector having an axis of symmetry in coincidence with the main axis of the device and having a reflecting surface configured so that a cross section of said reflecting surface in any plane in which the main axis of the device lies is part of a parabola with the geometric focal point of said parabola located on the main axis of the device and the geometric axis of said parabola intersecting the main axis of the device and being angularly disposed with respect to the main axis, and a point source of radiation disposed at said focal point.
Claim 9
Dependent Claim
106 words
A radiation device comprising a continuous 360*-parabolic main reflector having an axis of symmetry in coincidence with the main axis of the device and having a reflecting surface configured so that a cross section of said reflecting surface in any plane in which the main axis of the device lies is part of a parabola with the geometric focal point of said parabola located on the main axis of the device and the geometric axis of said parabola intersecting the main axis of the device and being angularly disposed with respect to the main axis, and a point source of radiation disposed at said focal point.
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |