US4377802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp/reflector assembly
Assignee: Whelen Engineering Co Inc
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Filing: 1981-03-12
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Granted: 1983-03-22
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Expires: 2001-03-12
Abstract
Abstract A reflector for rotatable signal lights includes a pair of coaxial parabolic reflecting surfaces which are interrupted and joined back-to-back with the juncture forming an aperture which defines a plane through the common focal point of the two reflecting surfaces. A lamp is positioned within this aperture so that its filament is intersected by and perpendicular to the plane formed by the aperture. The doubled-ended reflector and associated lamp is used in conjunction with any conventional type of rotating of oscillating drive.
Inventors
- 👤 Robert A. Ferenc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:16
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/2611
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A warning light assembly comprising: reflector means, said reflector means having two coaxial concave surfaces, said concave surfaces being reflective and arranged back-to-back, said surfaces intersecting at a common plane perpendicular to the axis thereof, an aperture coaxial with said surfaces being defined by the intersection of said surfaces; light source means, said light source means being supported in reflector means, said light source means including an incandescent lamp positioned with its filament at least in part lying in said plane of intersection; and means for rotating said reflector means and said light source means as a unit.
Claim 2
Dependent Claim
98 words
A warning light assembly comprising: reflector means, said reflector means having two coaxial concave surfaces, said concave surfaces being reflective and arranged back-to-back, said surfaces intersecting at a common plane perpendicular to the axis thereof, an aperture coaxial with said surfaces being defined by the intersection of said surfaces; light source means, said light source means being supported in reflector means, said light source means including an incandescent lamp positioned with its filament at least in part lying in said plane of intersection; and means for rotating said reflector means and said light source means as a unit.
Claim 3
Dependent Claim
15 words
The warning light of claim 1 wherein said lamp is filled with a hologen gas.
Claim 4
Dependent Claim
20 words
The warning light of claim 1 wherein said concave surfaces are parabolic in shape and each has a focal point.
Claim 5
Dependent Claim
21 words
The warning light of claim 3 wherein said plane of intersection is coincident with the focal points of said parabolic surfaces.
Claim 6
Dependent Claim
28 words
The warning light of claim 4 wherein the filament of said lamp is oriented substantially transversely with respect to the said plane of intersection of said parabolic surfaces.
Claim 7
Dependent Claim
88 words
The warning light of claim 1 wherein said reflector means is comprised of a first and a second section, said first and second sections each defining a first and a second aperture, one of said concave reflective surfaces extending between the first and second aperture of each of said sections, the second aperture of each of said sections being of equal size and being smaller in cross-sectional area than the first aperture of each of said sections, said first and second sections being joined at said second apertures.
Claim 8
Dependent Claim
14 words
The warning light of claim 5 wherein said rotating means is an electric motor.
Claim 9
Dependent Claim
14 words
The warning light of claim 1 wherein said rotating means is an electric motor.
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) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |