US4604680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared floodlight
Assignee: 2933675 CANADA Inc
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Filing: 1985-04-25
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Granted: 1986-08-05
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Expires: 2005-04-25
Abstract
Abstract An infrared floodlight assembly designed particularly for security purposes and including a heat-conducting housing, a lens secured to the housing to provide a closure therefor, and a floodlight located within (and surrounded by) the housing. The floodlight combines the use of a tungsten halogen light source and dichroic hot and cold mirrors for directing substantially only infrared radiation toward the assembly's forward lens. Visible radiation is absorbed by the housing's interior wall(s) and, optionally, by a filter located between the floodlight and lens. An optional means may be used within the floodlight to reflect all forward radiation back toward the paraboloidal hot mirror or, alternatively, to reflect only visible radiation in this direction. The dichroic hot and cold mirrors preferably each comprise a glass substrate having multiple layers of titanium dioxide and silicon dioxide thereon.
Inventors
- 👤 Robert E. Levin
- 👤 George J. English
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:28
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/22; F21V7/28; F21V15/00; F21V15/01; F21V29/00; F21V29/50; F21V29/70; F21V29/74; F21V9/00; F21V9/20
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
82 words
An infrared floodlight comprising: a light source for providing infrared radiation; means located substantially on one side of said light source for reflecting infrared radiation from said light source and for transmitting visible radiation from said light source therethrough; and means secured to or forming part of said infrared reflecting means to provide a closure therefor, said closure means transmitting infrared radiation from said light source and from said infrared reflecting means therethrough and reflecting visible radiation toward said infrared reflecting means.
Claim 2
Dependent Claim
82 words
An infrared floodlight comprising: a light source for providing infrared radiation; means located substantially on one side of said light source for reflecting infrared radiation from said light source and for transmitting visible radiation from said light source therethrough; and means secured to or forming part of said infrared reflecting means to provide a closure therefor, said closure means transmitting infrared radiation from said light source and from said infrared reflecting means therethrough and reflecting visible radiation toward said infrared reflecting means.
Claim 3
Dependent Claim
21 words
The floodlight according to claim 1 wherein said light source is a tungsten halogen lamp having a coiled tungsten filament therein.
Claim 4
Dependent Claim
20 words
The floodlight according to claim 1 wherein said infrared reflecting means comprises a glass substrate having a dichroic coating therein.
Claim 5
Dependent Claim
19 words
The floodlight according to claim 3 wherein said dichroic coating comprises multiple layers of titanium dioxide and silicon dioxide.
Claim 6
Dependent Claim
17 words
The floodlight according to claim 3 wherein said infrared reflecting means is of a substantially paraboloidal configuration.
Claim 7
Dependent Claim
21 words
The floodlight according to claim 3 wherein said visible reflecting closure means comprises a glass substrate having a dichroic coating thereon.
Claim 8
Dependent Claim
19 words
The floodlight according to claim 6 wherein said dichroic coating comprises multiple layers of titanium dioxide and silicon dioxide.
Claim 9
Dependent Claim
17 words
The floodlight according to claim 6 wherein said visible reflecting closure means is of substantially curvilinear configuration.
Claim 10
Dependent Claim
39 words
The floodlight according to claim 1 further including means located between said light source and said visible reflecting closure means for reflecting visible radiation from said light source toward said infrared reflecting means and for transmitting infrared radiation therethrough.
Claim 11
Dependent Claim
31 words
The floodlight according to claim 9 wherein said visible reflecting means located between said light source and said visible reflecting closure means comprises a glass substrate having a dichroic coating thereon.
Claim 12
Dependent Claim
35 words
The floodlight according to claim 1 further including means located between said light source and said visible reflecting closure means for reflecting infrared and visible radiation from said light source toward said infrared reflecting means.
Claim 13
Dependent Claim
23 words
The floodlight according to claim 11 wherein said visible and infrared reflecting means comprises a curvilinear opaque member located adjacent said light source.
Claim 14
Dependent Claim
117 words
An infrared floodlight assembly comprising: a heat conductive housing defining an open end; a lens member secured to said housing and providing a cover for said open end; and an infrared floodlight located within said housing, said floodlight including a light source for providing infrared radiation, means located substantially on one side of said light source for reflecting infrared radiation from said light source and for transmitting visible radiation from said light source therethrough, and means secured to or forming part of said infrared reflecting means to provide a closure therefor, said closure means transmitting infrared radiation from said light source and from said infrared reflecting means therethrough and reflecting visible radiation toward said infrared reflecting means.
Claim 15
Dependent Claim
117 words
An infrared floodlight assembly comprising: a heat conductive housing defining an open end; a lens member secured to said housing and providing a cover for said open end; and an infrared floodlight located within said housing, said floodlight including a light source for providing infrared radiation, means located substantially on one side of said light source for reflecting infrared radiation from said light source and for transmitting visible radiation from said light source therethrough, and means secured to or forming part of said infrared reflecting means to provide a closure therefor, said closure means transmitting infrared radiation from said light source and from said infrared reflecting means therethrough and reflecting visible radiation toward said infrared reflecting means.
Claim 16
Dependent Claim
27 words
The floodlight assembly according to claim 13 further including filter means for absorbing visible radiation located within said housing between said lens member and said infrared floodlight.
Claim 17
Dependent Claim
15 words
The floodlight assembly according to claim 13 wherein said housing includes heat dissipating means thereon.
Claim 18
Dependent Claim
20 words
The floodlight assembly according to claim 13 wherein said housing includes an internal surface having visible radiation absorbing material thereon.
Claim 19
Dependent Claim
31 words
The floodlight assembly according to claim 13 wherein said lens member is of substantially curvilinear configuration and includes an internal lenticular surface for diffusing infrared radiation passing through said lens member.
Claim 20
Dependent Claim
25 words
The floodlight assembly according to claim 13 wherein said light source of said floodlight is a tungsten halogen lamp having a coiled tungsten filament therein.
Claim 21
Dependent Claim
39 words
The floodlight assembly according to claim 18 wherein said light source includes a pair of metallic, conductive lead wires passing externally of said floodlight, said housing further including an atmosphere therein for substantially protecting said lead wires from contamination.
Claim 22
Dependent Claim
29 words
The floodlight assembly according to claim 19 further including socket means connected to said lead wires within said housing, said socket means including electrical wiring passing through said housing.
Claim 23
Dependent Claim
24 words
The floodlight assembly according to claim 13 wherein said infrared reflecting means of said floodlight comprises a glass substrate having a dichroic coating thereon.
Claim 24
Dependent Claim
20 words
The floodlight assembly according to claim 21 wherein said dichroic coating comprises multiple layers of titanium dioxide and silicon dioxide.
Claim 25
Dependent Claim
18 words
The floodlight assembly according to claim 21 wherein said infrared reflecting means is of a substantially paraboloidal configuration.
Claim 26
Dependent Claim
22 words
The floodlight assembly according to claim 13 wherein said visible reflecting closure means comprises a glass substrate having a dichroic coating thereon.
Claim 27
Dependent Claim
20 words
The floodlight assembly according to claim 24 wherein said dichroic coating comprises multiple layers of titanium dioxide and silicon dioxide.
Claim 28
Dependent Claim
43 words
The floodlight assembly according to claim 13 further including means located within said floodlight between said light source and said visible reflecting closure means for reflecting visible radiation from said light source toward said infrared reflecting means and for transmitting infrared radiation therethrough.
Claim 29
Dependent Claim
35 words
The floodlight assembly according to claim 26 wherein said visible reflecting means located within said floodlight between said light source and said visible reflecting closure means comprises a glass substrate having a dichroic coating thereon.
Claim 30
Dependent Claim
39 words
The floodlight assembly according to claim 13 further including means located within said floodlight between said light source and said visible reflecting closure means for reflecting infrared and visible radiation from said light source toward said infrared reflecting means.
Claim 31
Dependent Claim
27 words
The floodlight assembly according to claim 28 wherein said visible and infrared reflecting means within said floodlight comprises a curvilinear opaque member located adjacent said light source.
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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |