Continuous automatic starting assist UV circuit for microwave powered electrodeless lamps
Patent 4053814 Issued on October 11, 1977. Estimated Expiration Date: 
October 11, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 11, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3142758 3196312 3227923 3258758 3377507 3497767 3636357 3873884 InventorsAssigneeApplicationNo. 05/705328 filed on 07/14/1976US Classes:315/248, Induction-type discharge device load250/372, Ultraviolet light responsive means250/504R, Ultraviolet or infrared source315/151, Load device irradiating the radiant energy responsive device315/158, Radiant energy controlled regulation of the current supply for the load device315/267, Electromagnetic influenced discharge device load315/344Electromagnetic influenced discharge deviceExaminersPrimary: Chatmon, Saxfield Jr.Attorney, Agent or FirmInternational ClassH05B 41/24 (20060101)AbstractA starting assist control circuit for an electrodeless light source in which a UV source for assisting in starting an electrodeless lamp is coupled in series with the DC supply for a microwave power source for the lamp so that a reduced DC voltage is supplied to the microwave power source at lamp starting. An electronic circuit is provided which continuously decreases the DC current through the UV source and increases the DC voltage for the microwave power source in relation to the amount of light generated by the electrodeless lamp. More specifically, the emitter and collector of a transistor are coupled across the UV source to provide a shunt path and the potential of the base of the transistor is controlled by a photosensitive resistor which senses the amount of light from the lamp. As the lamp generates increased light, the transistor becomes more conductive, thereby continuously decreasing current to the UV source and increasing voltage to the microwave power source.Field of SearchInduction-type discharge device loadDischarge device load with distributed parameter-type transmission line (e.g., wave-guide, coaxial cable) Load device irradiating the radiant energy responsive device Radiant energy controlled regulation of the current supply for the load device Electric switch controlled by the radiant energy responsive device Thermostatic controlled delaying means Electromagnetic influenced discharge device load Inductance in the supply circuit Electromagnetic influenced discharge device | |
