Automatic momentary secondary light source assembly
First Claim
1. A secondary light assembly light for emitting light into an area lit by a primary light source, said secondary light assembly comprising:
- a light sensor for sensing light emitted from the primary light source;
a secondary light source operatively connected to said light sensor; and
a controller electrically connected to said light sensor and said secondary light source, said controller calculation a rate of change of light emission from the primary light source such that said controller turns on said secondary light source when the rate of change of light emission from the primary light source is above a predetermined rate threshold, said controller including a timer to measure an amount of time beginning when said controller turns said secondary light source on and a reset switch for turning said secondary light source off when said timer times out after a time equal to said amount of time.
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Accused Products
Abstract
A secondary light assembly emits light into an area lit by a primary light source. The secondary light assembly includes a light sensor for sensing light emitted from the primary light source. A secondary light source is operatively connected to the light sensor. A controller is electrically connected to the light sensor and the secondary light source. The controller calculates a rate of change of light emission from the primary light source such that the controller turns the secondary light source on when the rate of change of light emission from the primary light source is above a predetermined rate threshold.
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Citations
18 Claims
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1. A secondary light assembly light for emitting light into an area lit by a primary light source, said secondary light assembly comprising:
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a light sensor for sensing light emitted from the primary light source; a secondary light source operatively connected to said light sensor; and a controller electrically connected to said light sensor and said secondary light source, said controller calculation a rate of change of light emission from the primary light source such that said controller turns on said secondary light source when the rate of change of light emission from the primary light source is above a predetermined rate threshold, said controller including a timer to measure an amount of time beginning when said controller turns said secondary light source on and a reset switch for turning said secondary light source off when said timer times out after a time equal to said amount of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A secondary light assembly for emitting light into an area lit by a primary light source, said secondary light assembly comprising:
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a light sensor for sensing light emitted from the primary light source; a secondary light source operatively connected to said light sensor; a controller electrically connected to said light sensor and said secondary light source, said controller calculating a rate of change of light emission from the primary light source such that said controller turns on said secondary light source when the rate of change of light emission from the primary light source is above a predetermined rate threshold; and a soft off circuit for ramping down the light emitted by said secondary light source at a ramp down rate that is less than said predetermined rate threshold. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A secondary light assembly for emitting light into an area lit by a primary light source, said secondary light assembly comprising:
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a light sensor for sensing light emitted from the primary light source; a secondary light source operatively connected to said light sensor; a manual switch operatively connected to said secondary light source for turning said secondary light source on and off; a controller electrically connected to said light sensor, said secondary light source and said manual switch, said controller operating said manual switch to turn on said secondary light source a first predetermined time when said light sensor senses the turning off of the primary light source; and a normally open momentary contact switch electrically connected to said secondary light source for turning on said secondary light source a second predetermined time greater than said first predetermined time when said manual switch is closed. - View Dependent Claims (17, 18)
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Specification