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Capacitor-discharge-strobe-light

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Capacitor discharge strobe light

Details

Inventors: Crooks, James M.;
Assignee:
Primary Examiner: Groody; James J.
Assistant Examiner: Powell; Mark R.
Attorney, Agent or Firm: Haight & Hofeldt

A compact capacitor discharge and strobe light beacon system is disclosed which is designed to be used in a conventional incandescent aircraft warning light fixture. The system comprises: a step-up transformer; a pulse shaping network for rectifying the output of the transformer to pulsating DC, capacitor means connected to the output of the pulse shaping network, a choke, at least two xenon lamps with terminals and connected across the terminals of an energy storage capacitor through the choke, and a switch which fires the lamps.

DETAILED DESCRIPTION An object, advantage and feature of the invention is to provide a novel retrofitable capacitor discharge strobe light which is sufficient to meet the requirements of Federal Aviation Administration Bulletin Number AC 70/7460 (Aviation Marking and Lighting).
Another object of the invention is to provide a ring of xenon lamps wired and controlled to flash simultaneously and redundantly to produce a light output substantially in excess of 20,000 candela during daylight and 2,000 candela during the night.
A further object of the invention is to provide a light system which is configured and packaged in a way that it may be easily carried and installed by one person in an existing standard (e.
g.
, 300 MM code) beacon incandescent tower light fixture, thus greatly reducing the cost of the lighting system, the cost of its installation, and its maintenance.
In one embodiment of the invention, the strobe light beacon system comprises: HVDC means for producing a high voltage from the AC power supply to the base of the preexisting incandescent tower light fixture; energy storage means for receiving the high voltage through a choke and capacitively storing energy therein; means for producing light from at least two discharge lamps which are connected to be operated redundantly and simultaneously in response to a triggering signal; means for operating a switch to apply the triggering signal to the lamps after AC power has been applied to the charge the energy storage means for a predetermined time interval; and mounting means carried by the base of the incandescent light fixture and fitting within a Fresnel lens for mounting the energy storage means and the lamps.
In one embodiment of the invention, the system has a daylight mode and a night mode, a bank of capacitors for storing energy for each mode and appropriate switching, and means for biasing a bank of electrolytic capacitors that are not in use to prolong their life.
In one embodiment of the invention xenon discharge lamps are used which are positioned along a ring so as to be axially offset from the axis of the Fresnel lens

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