Lighting fixture for theater, television and architectural applications
Patent 5544029 Issued on August 6, 1996. Estimated Expiration Date: 
November 12, 2013. 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.
November 12, 2013. 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 3455622 3842253 3883733 3930149 Compact overhead projector Motion picture optical system Quasimonochromatic light source Automatic gel changer for a spotlight Projection unit including glass reflector with insulative cap member Motor vehicle headlight with condensing lens and diaphragm InventorApplicationNo. 151724 filed on 11/12/1993US Classes:362/271, With actuator313/113, Reflector362/268, Plural serial lens elements or components362/294, With ventilating, cooling or heat insulating means362/308, Refractor362/310, Enclosed light source362/328, Reflector separate from refractor362/338, Plural elements on a curved surface362/345, With ventilating or cooling362/351Translucent or opaque (e.g., "shade")ExaminersPrimary: Gromada, Denise L.Assistant: Sember, Thomas M. Attorney, Agent or FirmInternational ClassesF21V 007/20309 328 333 296 32 297 AbstractAn improved lighting fixture for projecting a high-intensity beam of light that is imaged at a distant location, with reduced manufacturing cost and with reduced weight, but greater efficiency. Various structures are disclosed for eliminating infrared light from the projected beam, whereby the fixture's lens can advantageously be formed of a suitable plastic material and be configured as an aspheric fresnel lens or a stepped aspheric lens.Field of SearchShutter typeIn plane, or extension of modifying surface Including selected wavelength modifier (e.g., filter) Angularly adjustable or respositionable Curved main surface Plural separate reflectors or separate sections Enclosed light source With ventilating or cooling With cooling means Including translucent or transparent modifier With ventilating, cooling or heat insulating means Plural, relatively movable Plural serial lens elements or components With or including means modifying axial rays Curved main surface Coaxial Prismatic type Including diverse refracting elements on one surface Enclosure type Reflector Polarizer or special ray transmission (e.g., filter) | |
