Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Herbert Heinrich Kreus

Hendrikus A Van Dulmen

Jaak M Geboers

Hubert Frings

Franz Herbert Kaulen

The electric lamp/reflector unit includes a reflector body ( ) having a reflector portion ( ) with a concave reflecting surface ( ), and a neck-shaped portion ( ), both surrounding an optical axis ( ). The unit includes an electric lamp ( ) which is provided with a lamp vessel ( ) having a cavity ( ) wherein an electric light source ( ) is arranged. The cavity ( ) is provided with an infrared-reflecting and visible light-transmitting coating ( ). The electric lamp ( ) has a first ( ) and a second ( ) end portion which are arranged opposite each other and provided with a seal, through which seals respective current conductors ( ) connected via embedded metal foils ( ) to the electric light source ( ) issue from the lamp vessel ( ) to the exterior. According to the invention, the electric lamp ( ) is fitted in the reflector body ( ) with the first end portion ( ) inside the neck-shaped portion ( ), while the cavity ( ) lies within the reflecting portion ( ) and the electric light source ( ) is on the optical axis ( ). The ratio of the distance d ;d , from the connection point ( ) where the current conductor ( ) is connected to the metal foil ( ), to the length l ;l of the first and the second end portion ( ) lies in the range d /l &gE;0.75 and d /l &gE;0.75, the distance d ;d and the length l ;l being measured with respect to a geometrical center ( ) of the lamp vessel ( ).

Electric lamp/reflector unit

A capped lamp/reflector unit has a reflector body, an electric lamp whose electric element is aligned with respect to the reflector and a cap from which contact pins extend. Within the cap the pins have a widened portion having an end face transverse to the optical axis of the reflector body. The current supply conductors of the electric lamp are cut to length transverse to the axis and butt-welded to the contact pins at the widened portion.

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Stolberg, Germany

Herbert Heinrich Kreus