Title: Electric lamp having an envelope with a specular light-reflective coating of oriented aluminum particles

Abstract: A selected part of the envelope of a fabricated electric lamp is made light-reflecting by spraying it with a coating composition that contains aluminum flakes of such minute size that they inherently arrange themselves in planar relationship and form a specular film as the composition dries. A protective coating of a suitable heat-resistant material, such as silicone plastic, is then sprayed over the reflective film and cured. The protective coating can also contain aluminum particles in order to fill voids that may be left in the thin specular film and to make the latter more opaque.

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Inventors: DeCaro, Aristide R. (Edison, NJ, US)
Murphy, Eugene F. (Pompton Plains, NJ, US)
Maynard, Billy A. (Lexington, KY, US)

Application Number: 452864
Filing Date: 1974-03-20
Publication_date: 1976-01-13
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 313/113 313/116, 427/106
Other Classes:
US Patent Ref:

2875087	Feb, 1959	Crandon	117/35.
3281620	Oct, 1966	Miller	313/113.
3536946	Oct, 1970	Kopelman et al.	313/113.
3692731	Sep, 1972	McAdow	260/32.
3697070	Oct, 1972	McAdow	106/291.
3721850	Mar, 1973	Giller	313/113.

Other Refs:
Primary Examiner: Brody, Alfred L.
Assistant Examiner:
Attorney: Buleza; D. S.