Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Patent-treuhand-gesellschaft Fuer Elektrische Gluehlampen Mbh

Alfred Braun

Hermann Steiner

Peter Helbig

Walter Schoenherr

Walter Schonherr

To permit rapid adjustment of a holder structure (4) within which a singlnded pinch-sealed light source, for example a halogen incandescent lamp (1, 2) is retained, to a positioning or locating element having an optical reference surface (17a) to accurately align the light emitting element (2) of the light source with respect to an optical system, for example a reflector, a tubular adjustment sleeve (10) is provided into which the holder structure is fitted. The tubular adjustment sleeve has an essentially cylindrical portion (11) and a slightly conically converging portion (12) or an inwardly extending rim or ring (12') to permit rotational, axial and tilting adjustment of the holder structure to which the light source (1) is coupled with respect thereto. The tubular sleeve is formed with a laterally projecting flange (14, 14a) formed with a plane, burr-free engagement surface (14b) which fits against an auxiliary plane, flat reference surface (18b) on the positioning or locating element (15). The holder structure (4), the adjustment sleeve ( 10) and the positioning or locating element (15) are all formed of sheet metal and, after appropriately positioning the lamp with respect to the optical reference surface (17a) of the holder structure, the metallic elements are welded together, preferably by non-contacting, for example laser welding, to thereby provide for rapid manufacture of accurately aligned light sources with respect to the optical reference surface (17a).

Electric lamp and optically alignable cementless base combination

To improve shock and vibration resistance and heat dissipation of an attaent element (1) coupling the pinch seal (3) of a halogen incandescent lamp (2) to a plastic base (6), the attachment element is formed of two identical half-sections, surrounding the pinch seal in the shape of a cuff (4) and connected to a flange or skirt by an intermediate heat dissipation and shock absorbing portion (7, 11, 12, 13, 14). Preferably, the intermediate portion forms a connecting section, which can be bent into U or double U configuration off the upper region of the flange or skirt portion (8a, 8b), to provide a large heat radiating surface while retaining the pinch seal of the lamp between undulating sheet-metal portions. Preferably, the attachment element is made of unitary sections of high-quality specialty steel.

Vibration, shock and heat-resistant lamp-base combination structure

To permit ready attachment of a pinch or press seal terminating a halogen incandescent lamp, particularly for automotive use, a base sleeve (9), for example of steel, is formed as a hollow cylinder having, at the end remote from the bulb, at least two spaced flange elements (28) extending radially inwardly of the sleeve and essentially at right angles to the axis of the lamp. A base plug element, formed as a solid body, for example of highly heat-resistant plastic material, is located projecting from the base sleeve, and positioned remote from the bulb. The essentially cylindrical solid body (29) is formed with a circumferential collar of smaller outside diameter, and separated from the remainder of the solid body by a circumferential ring groove. The collar (30) is subdivided into a plurality of circumferential projections (31, 32), at least two of said circumferential projections are formed with radially outwardly extending holding projections (33) which engage behind and around the flange elements of the base sleeve (9) upon relative rotation of the base sleeve and the plug element formed by the essentially cylindrical solid body ( 29). A metallic holder element (7) surrounds the pinch or press seal and has extending leg or apron portions which are metal-to-metal welded, for example spot-welded to the base sleeve (9).

Cementless lamp bulb and base combination

The bulb (1) of an incandescent lamp, such as a vehicular headlight, is mted on a base structure (3) without cementing, by means of a securing element (2) having two shell-shaped halves (4). Each half (4) has a lug (5) on one side and bent tabs (6) on its other side which engage the lug (5) of the other half (4) to form a cuff around the pinch seal of the lamp and to connect the lamp to the base structure (3), which may be made of plastic. Each half (4) has a flange (8) with a projecting rim (10) whose curvature matches that of a tubular base structure (3). The projecting rim (10) has perforations (9) so that, if a plastic base structure (3) is used, the rim (10) can be connected to the base structure (3) by high-frequency heating, which causes the plastic to permeate the perforations (9) and harden therein.

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Herbrechtingen, Germany

Alfred Braun