The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 1991
Filed:
Jul. 24, 1989
Petrus A Holten, Weert, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The electric incandescent lamp according to the invention has a lamp vessel (1) comprising a second wall portion (6) opposite to a neck-shaped first wall portion (4). Between the largest diameter (3) and the second wall portion (6) is disposed a third mirror-coated wall portion (7,7'), which is mainly curved in axial section along the arc of a circle, whose center (8,8') is located on the other side of the axis of symmetry (2) and of a plane passing through the largest diameter (3). The filament (10) has a plane of symmetry passing through the axis of symmetry (2) and extends on either side of a second plane through said axis at right angles to the first plane. The lamp produces together with an external reflector a narrow beam with a high luminous flux at the center thereof.