Vehicle marker light
First Claim
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1. A battery powered marker light for use with end of train equipment comprising:
- a light source including an array of light emitting diodes arranged to produce a light beam pattern in a red-orage-amber color range with a minimum arc width of at least 15 degrees on each side of a vertical center line and 5 degrees on each side of a horizontal center line and an intensity on an axis of the beam of not less than 100 candela; and
an electronic circuit connected to said array of light emitting diodes for intermittantly turning said array of light emitting diodes on and off at a predetermined time interval to provide a flashing light.
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Abstract
A marker light using an array (2) of light emitting diodes (12) in combination with lenses (3) provides a light beam of required intensity, shape and color for railroad applications. The light emitting diodes are arranged in various configurations to form the array (2). The lenses may be Fresnel lenses. Control circuitry (C) energizes the light emitting diodes at predetermined or variable flashing rates. Sensing circuitry (222) senses the failure of light emitting diodes in the array and provides an indication of such failure.
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Citations
16 Claims
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1. A battery powered marker light for use with end of train equipment comprising:
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a light source including an array of light emitting diodes arranged to produce a light beam pattern in a red-orage-amber color range with a minimum arc width of at least 15 degrees on each side of a vertical center line and 5 degrees on each side of a horizontal center line and an intensity on an axis of the beam of not less than 100 candela; and an electronic circuit connected to said array of light emitting diodes for intermittantly turning said array of light emitting diodes on and off at a predetermined time interval to provide a flashing light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification