Incandescent lamp incorporating reflective filament supports and method for making it
First Claim
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1. An incandescent lamp comprising:
- an envelope having a closed interior space and a longitudinal axis;
one or more filaments located in the interior space of the envelope; and
forward and rearward filament supports positioned in the interior space of the envelope and configured to support the one or more filaments in a prescribed position between them, wherein each filament support comprises a block of material extending transversely across substantially the entire interior space of the envelope and having an average total reflectance of at least 90% across a wavelength range of 500 to 2000 nanometers.
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Abstract
An improved incandescent lamp and incandescent lighting system are disclosed, for projecting a beam of light with substantially improved energy efficiency. The incandescent lamp includes a pair of reflective ceramic filament supports for supporting one or more filaments in prescribed position(s) within an envelope while reflecting back substantially all visible and infrared light for incorporation into the projected beam or for absorption by the filament(s).
24 Citations
34 Claims
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1. An incandescent lamp comprising:
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an envelope having a closed interior space and a longitudinal axis; one or more filaments located in the interior space of the envelope; and forward and rearward filament supports positioned in the interior space of the envelope and configured to support the one or more filaments in a prescribed position between them, wherein each filament support comprises a block of material extending transversely across substantially the entire interior space of the envelope and having an average total reflectance of at least 90% across a wavelength range of 500 to 2000 nanometers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An incandescent lamp comprising:
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an envelope having a closed interior space and a longitudinal axis; one or more filaments located in the interior space of the envelope and extending along, or parallel with, the longitudinal axis; and forward and rearward filament supports positioned in the interior space of the envelope and configured to support the one or more filaments in a prescribed position between them, wherein each filament support comprises a block of material extending transversely across substantially the entire interior space of the envelope; wherein the lamp is free of any support structure located in the interior space of the envelope, radially outward of the one or more filaments.
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34. An incandescent lamp comprising:
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an envelope having a closed interior space and a longitudinal axis; one or more filaments connected together in series and located in the interior space of the envelope and extending along, or parallel with, the longitudinal axis; two power leads associated with the one or more filaments; forward and rearward filament supports positioned in prescribed positions in the interior space of the envelope, with the one or more filaments disposed between them; wherein the forward filament support and/or the rearward filament support include separate power lead apertures for slidably receiving and supporting the two power leads; and segments of tungsten wire wrapped around each of the two power leads, adjacent to the ends of the power lead apertures, for securing the associated forward or rearward filament support in its prescribed position in the interior space of the envelope.
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Specification