US3720822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xenon photography light
Assignee: Xenotech Inc
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Filing: 1971-01-29
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Granted: 1973-03-13
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Expires: 1991-01-29
Abstract
Abstract A D.C. cinematography light source of 85,000 lumens with a color temperature of approximately 6,000* Kelvin uses a xenon lamp mounted adjacent a ray collector so that collector and lamp are relatively movable to achieve focus. An air duct supports the lamp and an air blower discharges into the duct and about the lamp. A shroud at the front end of the lamp housing supports a light mixer or diffuser and directs exhaust air rearwardly, exteriorly of the housing. A central board in the housing supports air blowers and other electrical and electronic components away from the housing for efficient cooling air circulation to them and the ray collector. The ray collector has a reflective contour generated preferably by a modified skewed ellipse. The light mixer achieves controlled diffusion by means of a shallowly etched rear surface. The housing is supported from conventional lighting brackets and stands.
Inventors
- 👤 J Rochester
- 👤 Curdy N Mc
- 👤 F Hamilton
- 👤 F Navarro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:57
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/2006; G03B21/2026; G03B15/00; G03B15/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
141 words
In a photography light having a xenon lamp with a front terminal and a rear terminal, the combination comprising a housing, a light transmitting window at the front of the housing, a transverse mounting board dividing the housing, an air duct fixed in the housing and opening about the lamp, a light collector mounted on the duct, a first air source discharging into the duct; means for imparting relative motion between the collector and the xenon lamp; a second air source discharging air into the housing adjacent the duct and volumetrically isolated therefrom; lamp circuit components mounted about the duct in the volume between the duct and the housing such that air from the second source impinges upon them; and air exhaust means directing air discharge from the housing front in a direction opposite to the direction of beamed light rays.
Claim 2
Dependent Claim
141 words
In a photography light having a xenon lamp with a front terminal and a rear terminal, the combination comprising a housing, a light transmitting window at the front of the housing, a transverse mounting board dividing the housing, an air duct fixed in the housing and opening about the lamp, a light collector mounted on the duct, a first air source discharging into the duct; means for imparting relative motion between the collector and the xenon lamp; a second air source discharging air into the housing adjacent the duct and volumetrically isolated therefrom; lamp circuit components mounted about the duct in the volume between the duct and the housing such that air from the second source impinges upon them; and air exhaust means directing air discharge from the housing front in a direction opposite to the direction of beamed light rays.
Claim 3
Dependent Claim
141 words
In a photography light having a xenon lamp with a front terminal and a rear terminal, the combination comprising a housing, a light transmitting window at the front of the housing, a transverse mounting board dividing the housing, an air duct fixed in the housing and opening about the lamp, a light collector mounted on the duct, a first air source discharging into the duct; means for imparting relative motion between the collector and the xenon lamp; a second air source discharging air into the housing adjacent the duct and volumetrically isolated therefrom; lamp circuit components mounted about the duct in the volume between the duct and the housing such that air from the second source impinges upon them; and air exhaust means directing air discharge from the housing front in a direction opposite to the direction of beamed light rays.
Claim 4
Dependent Claim
141 words
In a photography light having a xenon lamp with a front terminal and a rear terminal, the combination comprising a housing, a light transmitting window at the front of the housing, a transverse mounting board dividing the housing, an air duct fixed in the housing and opening about the lamp, a light collector mounted on the duct, a first air source discharging into the duct; means for imparting relative motion between the collector and the xenon lamp; a second air source discharging air into the housing adjacent the duct and volumetrically isolated therefrom; lamp circuit components mounted about the duct in the volume between the duct and the housing such that air from the second source impinges upon them; and air exhaust means directing air discharge from the housing front in a direction opposite to the direction of beamed light rays.
Claim 5
Dependent Claim
34 words
Apparatus in accordance with claim 1 further comprising means supporting one terminal of the xenon lamp within the duct, and a front spider adjacent the front window suspending the other terminal of the lamp.
Claim 6
Dependent Claim
54 words
Apparatus in accordance with claim 2 wherein the front spider comprises spider arms, a central lamp terminal retainer at the convergence of the spider arms, an electrical connector between the central retainer and a spider arm, and means suspending each spider arm from the housing at spaced points on the periphery of the housing.
Claim 7
Dependent Claim
66 words
Apparatus in accordance with claim 2 wherein the front spider comprises a plurality of spider arms, a central lamp terminal retainer at the convergence of the spider arms, pivot means securing each arm to the retainer, an electrical connector between the central retainer and a spider arm, and means movably suspending each spider arm from the housing at spaced points on the periphery of the housing.
Claim 8
Dependent Claim
41 words
A light in accordance with claim 1 wherein the means for imparting relative motion comprises means suspending the lamp for axial motion with respect to the collector, and a control arm linked to the lamp and extending exteriorly of the housing.
Claim 9
Dependent Claim
99 words
A light in accordance with claim 5 wherein the means suspending the lamp comprises a duct spider, a terminal adapter held in the duct spider, said spider being slidable in the duct, a front lamp terminal retainer, a plurality of radial arms extending from the retainer, each arm being pivotally secured to the retainer, an arm bracket securing each arm pivotally to the housing adjacent the front window, means insulating each arm from the housing, an electrical lead from a spider arm to the retainer, and a second electrical lead from the same arm to the lamp circuit terminus.
Claim 10
Dependent Claim
63 words
A photography light in accordance with claim 1 wherein the window comprises a heat-resistant glass disk, a smooth exterior surface and an irregular interior surface, said interior surface having a plurality of smoothed surface indentations and protuberances the majority of which are each defined by more curvilinear than planar facets such that few sharp lines of facet convergence exist in the interior surface.
Claim 11
Dependent Claim
73 words
A photography light in accordance with claim 1 wherein the means for imparting relative motion comprises means fixing the lamp with respect to the duct and housing, a sleeve slidable on the duct, means for attaching the collector to the sleeve, and a control arm fixed to the sleeve and extending exteriorly of the housing to be manually manipulated to change axially the position of the collector with respect to the fixed lamp.
Claim 12
Dependent Claim
180 words
In a photography light having a xenon lamp with a pin terminal and a threaded terminal, the combination comprising a housing, a vented back closure on the housing, a light transmitting window closing the front of the housing, a transverse mounting board dividing the housing, an axial air duct fixed in the housing and opening about the lamp, a light collector mounted on the duct, a first air blower discharging air into the duct remote from the collector; means for imparting relative motion between the collector and the lamp; a second air blower within the housing forward of the mounting board adjacent the duct and volumetrically isolated therefrom; an igniter, a blower transformer, a relay, and a diode in the lamp circuit, all mounted about the duct forward of the mounting board in the volume between the duct and the housing suCh that air from the second blower impinges upon them in substantially the order of their heat output, and air exhaust means directing air discharge from the housing in a direction opposite to the direction of beamed light rays.
Claim 13
Dependent Claim
180 words
In a photography light having a xenon lamp with a pin terminal and a threaded terminal, the combination comprising a housing, a vented back closure on the housing, a light transmitting window closing the front of the housing, a transverse mounting board dividing the housing, an axial air duct fixed in the housing and opening about the lamp, a light collector mounted on the duct, a first air blower discharging air into the duct remote from the collector; means for imparting relative motion between the collector and the lamp; a second air blower within the housing forward of the mounting board adjacent the duct and volumetrically isolated therefrom; an igniter, a blower transformer, a relay, and a diode in the lamp circuit, all mounted about the duct forward of the mounting board in the volume between the duct and the housing suCh that air from the second blower impinges upon them in substantially the order of their heat output, and air exhaust means directing air discharge from the housing in a direction opposite to the direction of beamed light rays.
Claim 14
Dependent Claim
37 words
A light in accordance with claim 9 further comprising means supporting the threaded terminal of the xenon lamp within the duct, and a front spider adjacent the front window suspending the pin terminal of the xenon lamp.
Claim 15
Dependent Claim
42 words
A photography light in accordance with claim 9 wherein the means for imparting relative motion comprises means suspending the lamp for axial motion with respect to the collector, and a control arm linked to the lamp and extending exteriorly of the housing.
Claim 16
Dependent Claim
97 words
A photography light in accordance with claim 11 wherein the means suspending the lamp comprises a duct spider slidable in the duct, a terminal adapter held in the duct spider, a front lamp terminal retainer, a plurality of radial arms extending from the retainer, each arm being pivotally secured to the retainer, an arm bracket securing each arm pivotally to the housing adjacent the front window, means insulating each arm from the housing, an electrical lead from a radial arm to the retainer, and a second electrical lead from the same arm to the lamp circuit terminus.
Claim 17
Dependent Claim
63 words
A photography light in accordance with claim 9 wherein the window comprises a heat-resistant glass disc, a smooth exterior surface and an irregular interior surface; said interior surface having a plurality of smoothed surface indentations and protuberances, the majority of which are each defined by more curvilinear than planar facets such that few sharp lines of facet convergence exist in the interior surface.
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |