Light source assembly and methods for aircraft external lighting
First Claim
1. A dual mode light unit for an aircraft, said unit comprising:
- light control circuitry configured to be operatively connected with wiring connecting with pilot interface circuitry so as to receive an electrical current therefrom,a visible navigational light source connected with the light control circuitry, andan infrared light source connected with the light control circuitry,said light control circuitry, when the electrical current is in a first electrical state, supplying power to the visible navigational light source and, when the electrical current is in a second state, causing the visible light source to produce substantially no visible light and supplying power to the infrared light source so that the infrared light source pulses in a first time dependent pattern, and said pattern having pulses or intervals between pulses of two or more different durations.
1 Assignment
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Accused Products
Abstract
An aircraft light assembly comprises a light apparatus configured to be supported in a space on the body of an aircraft. The apparatus has one or more light emitting diodes (13) generating visible light and an outer structure overlying the LEDs. The outer structure includes a light transmission portion through which visible light from the LEDs can pass, and a metallic portion with an outer surface exposed to the external airflow. A heat-transmitting connection thermally links the LEDs to the metallic portion so that heat from the LEDs flows to the outer surface and is dissipated to the external airflow. The light assembly is configured to be secured in a conventional socket for an incandescent navigation light bulb and to receive the electrical current supplied thereto by the aircraft electrical system. Civilian applications of the unit have only visible LEDs. When the unit is for a military aircraft, it has electric circuitry connected with a visible light source and an IR light source, and the electric circuitry is configured to process the input current from the socket and based thereon operate in either a visible mode or covert IR mode. Where the current is in one electrical state, such as for example a certain voltage, the electric circuit sends power only to the visible light source. When the current is in a different electrical state, e.g., a different voltage level, the circuitry sends power only to the IR source, and no visible light is emitted. Different input current voltages or characteristics are also used to cause the IR emitter to flash in various patterns that can be programmed into the unit. All control may be accomplished over a single pair of wires, as in existing systems that do not have IR mode capability. To upgrade existing aircraft, light source units a shaped to fit in the apertures for existing lenses over incandescent navigational fixtures.
62 Citations
85 Claims
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1. A dual mode light unit for an aircraft, said unit comprising:
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light control circuitry configured to be operatively connected with wiring connecting with pilot interface circuitry so as to receive an electrical current therefrom, a visible navigational light source connected with the light control circuitry, and an infrared light source connected with the light control circuitry, said light control circuitry, when the electrical current is in a first electrical state, supplying power to the visible navigational light source and, when the electrical current is in a second state, causing the visible light source to produce substantially no visible light and supplying power to the infrared light source so that the infrared light source pulses in a first time dependent pattern, and said pattern having pulses or intervals between pulses of two or more different durations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. An aircraft light unit for placement in a space for a navigation light in a body of an aircraft through an opening, said aircraft having an electrical system supplying an electrical current to a socket in the space, said light unit comprising:
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an electrical connector configured to be received in the socket and to electrically connect therewith so as to receive said electrical current; circuitry connected with said electrical connector and receiving the electrical current therefrom; a light unit housing configured to be supported on the aircraft body in the space and closing said opening; and at least one visible light LED supported in the housing and being connected with the circuitry and receiving electrical power therefrom so that the LED emits visible light; the housing including an outer portion over said opening and over the LED, said outer portion having a light transmissive member through which the visible light from the LED can pass, and a thermally conductive metal outer member supporting the light transmissive member over the LED; said metal outer member and said light transmissive member defining an outer surface of the housing that is conformal to a contour of the body of the aircraft; the LED having a thermal link to the metal outer member that carries heat from the LED to the metal outer member, the metal outer member having a metallic outer surface with a surface area large enough and the thermal link having sufficient thermal conductivity such that heat from the LED is dissipated into air flowing over the outer portion so as to keep the LED in an operational temperature range thereof. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
removing the lens from a mounting location thereof on the aircraft body; setting the assembly in the mounting location; and fastening the securement plate over the assembly.
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63. The method of claim 61 wherein the aircraft initially has a navigational light in the socket covered by a lens held in place by a securement plate fastened to the body of the aircraft and overlying the lens, said light assembly having a configuration that emulates the shape of the lens combined with the securement plate, the method further comprising
unfastening the securement plate from a mounting location thereof on the aircraft body; -
removing the lens from a mounting location thereof on the aircraft body; setting the assembly in the mounting locations of the securement plate and the lens; and fastening the assembly in said mounting location.
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64. The method of claim 63 wherein the securement plate is fastened to the aircraft body by a bolt extending through a conforming passage therein, the assembly having a securement passage that matches the conforming passage of the securement plate, and
the step of fastening the assembly includes extending the bolt or a matching replacement bolt through the securement passage in said light assembly and fastening the bolt to said aircraft body. -
65. The aircraft light unit of claim 44 wherein an infra red emitter is connected with the circuitry, and said circuitry includes discriminator circuitry that determines from a characteristic of the electrical current whether the unit is selected for a visible light mode or a covert IR mode, and illuminates the LED for visible mode, and illuminates the infra red emitter for covert IR mode.
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66. The aircraft light unit of claim 65 wherein the circuitry has an input through which a user can program the circuitry to set the characteristic that is used by the discriminator circuitry.
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67. A method of installing a navigational light to an aircraft having wiring supplying electric current in one of a plurality of electrical states to a navigational light on the aircraft, said method comprising:
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removing the navigational light from the aircraft; and connecting a light unit according to claim 66 to the wiring of said aircraft.
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68. A method of installing a navigational light to an aircraft having wiring supplying electric current in one of a plurality of electrical states to a navigational light on the aircraft, said method comprising:
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removing the navigational light from the aircraft; and connecting a light unit according to claim 65 to the wiring of said aircraft.
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69. An aircraft light assembly for an aircraft, said aircraft having a body with an outer surface exposed to an external airflow over the aircraft, said aircraft light assembly comprising:
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a visible light apparatus configured to be supported on the body of the aircraft, said apparatus including one or more light emitting diode devices generating visible light; and an outer structure overlying the light emitting diode devices, said outer structure having a light transmissive portion through which visible light from the light emitting diode devices can pass, and a metallic portion connected with the light transmissive portion and securing said light transmissive portion on the aircraft, said metallic portion having an outer surface exposed to the external airflow; and the light emitting diode devices being thermally linked to said metallic portion so that heat created in the light emitting diode devices flows to the outer surface of the metallic portion and is dissipated into the external airflow. - View Dependent Claims (70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85)
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Specification