Abstract: A socket cover integrally formed of elastic material for covering a bulb mounting hole formed in a lamp body of a car lamp including a lens for covering a front opening of the lamp body and a light source bulb mounted on the lamp body comprises a body fitting portion of the socket cover enclosing the bulb mounting hole, to be fitted to the bulb mounting hole formed in the lamp body, to be connected to a bulb fitting portion, and to receive fitted the light source bulb; a back surface wall defining ventilating holes disposed in upper and lower portions of the back surface wall; ventilating pipes connected to the ventilating holes and including outward openings facing downward; and a protection wall integrally formed with the body fitting portion and extending rearward from a lower edge thereof.

Abstract: A socket cover integrally formed of elastic material for covering a bulb mounting hole formed in a lamp body of a car lamp including a lens for covering a front opening of the lamp body and a light source bulb mounted on the lamp body comprises a body fitting portion of the socket cover enclosing the bulb mounting hole, to be fitted to the bulb mounting hole formed in the lamp body, to be connected to s bulb fitting portion, and to receive fitted the light source bulb; a back surface wall defining ventilating holes disposed in upper and lower portions of the back surface wall; ventilating pipes connected to the ventilating holes and including outward openings facing downward; and an air introduction member connected with the outward opening of the ventilating pipe provided in a lower portion of the back surface wall for introducing open sir into an interior of the lamp body.

Abstract: A motor vehicle headlamp in which electromagnetic waves generated when the discharge bulb employed therein as the light source is activated are prevented from leaking out of the headlamp and interfering with other circuitry on the vehicle. The lamp body of the headlamp is made of a conductive material, or an insulating resin coated with a conductive layer. The lamp body or conductive layer is grounded to the body of the vehicle, thereby to ground out potentially interfering electromagnetic waves generated inside the lamp body.

Abstract: An aiming level device for a motor vehicle headlamp which has a short longitudinal length, requires a small number of components, and is simple to assemble. The inventive aiming level device includes a body member or base, a bubble vial supporting frame pivotable with respect to the body member, and a zero-point adjusting screw for holding a sideward extending part of the supporting frame. The bubble vial supporting frame, which is formed by cutting and bending a single thin metal plate, holds the bubble vial with parts continuously formed at a side region of the front-rear extending region of the frame to support the bubble vial at front and rear portions thereof, and the front and rear end portions of the front-rear extending region are held by the zero-point adjusting screw so that it is adjustable upward and downward by rotating the screw.

Abstract: A sealing cap for watertightly closing an access opening in the lamp housing of an aimable vehicle headlamp having a bulb tiltably mounted therein. The sealing cap comprises a relatively rigid framing part and a relatively pliant cap part closely interengaged into an essentially single unit. The framing part has a core of annular shape, and a plurality of hooks formed in one piece with the core and coacting therewith to engage the edge of the lamp housing bounding the access opening. The cap part is generally disklike in shape, comprising an outer sheath of annular shape enveloping the core of the framing part, a central bulb holder of tubular shape to be sleeved upon the base of the bulb, and an intermediate flexible connective portion of annular shape joining the sheath and the bulb holder.

Abstract: An automotive headlamp employing a discharge lamp as its light source in which the emission of harmful ultraviolet ray is eliminated in the output light beam. The headlamp includes a lamp body, a reflector mounted in the lamp body, and a discharge bulb mounted in a bulb insertion hole in the rear portion of the reflector. The discharge bulb is composed of a lamp base, a pair of long and short lead supports projecting forward from the lamp base, the discharge lamp, a pair of lead wires extending in respective forward and rearward directions from front and rear end portions of the discharge lamp, and forward and rear metal supports welded to the long and short lead supports and to respective ones of the lead wires so as to support the discharge lamp at its opposite ends on the long and short lead supports. The forward end of the longer lead support terminates at a position substantially corresponding to a front end edge of the front portion of the discharge lamp.

Abstract: In a automotive headlamp having a discharge bulb as a light source, a lighting circuit receiving chamber is formed in the rear of a lamp body, a discharge bulb lighting circuit is fixed in the lighting circuit receiving chamber through resin molding, and an inner flange-like guide portion is formed in the lighting circuit receiving chamber to act as a reference member to set a liquid surface position of poured molten resin in pouring the resin. Also, the inner flange-like guide portion abuts against the surface of the molded resin portion to thereby prevent the molded resin portion from separating from the lighting circuit receiving chamber.

Abstract: A vehicular headlamp employing a discharge bulb as a light source in which a lighting circuit for the bulb, including an ignitor, is secured to a lamp housing in such a manner as to cover a rear opening in the housing. This arrangement results in significantly reduced danger of shock and reduced radiation of electromagnetic noise. In another embodiment of the invention, a lighting-circuit-accommodating unit containing a lighting circuit is bayonet-engaged with a circular opening in the rear wall of a lamp body, and also is fixed to the lamp body by a second fixing device in such a manner as to prevent rotation of the lighting-circuit-accommodating unit relative to the lamp body.

Abstract: An automotive headlamp in which a bulb is mounted in such a manner that its filament is positioned in the vicinity of the focus of a main reflector, and a sub-reflector for reflecting, in a predetermined forward direction, direct rays of light emitted slantingly forward from the bulb is provided in front of the bulb. The sub-reflector is supported by an attaching portion formed on a back surface of the sub-reflector and attached to the reflector. The main reflector and the sub-reflector have different focal lengths.

Abstract: A discharge lamp system, particularly for vehicular headlamp applications, broadly comprises a discharge lamp assembly and a lighting circuit assembly. The discharge lamp assembly comprises a discharge lamp unit, and a lamp carrier subassembly mechanically supporting the discharge lamp unit and electrically connected thereto. The lighting circuit assembly comprises an electric lighting circuit mounted within a housing or housings for causing the discharge lamp unit to glow by an electric discharge. The discharge lamp assembly and the lighting circuit assembly are directly interconnected both mechanically and electrically, in order to dispense with cables or cords that have been conventionally used for their electrical interconnection.

Abstract: An aimable vehicular headlamp system has a discharge lamp assembly to be mounted to a vehicle body via aiming screws. The discharge lamp assembly comprises a discharge lamp bulb, and a bulb carrier subassembly directly coupled, both mechanically and electrically, to the lamp bulb. Also included is a lighting circuit assembly comprising a ballast section for providing a high alternating voltage, and an igniter section electrically connected between the ballast section and the bulb carrier subassembly of the discharge lamp assembly for causing the lamp bulb to glow by an electric discharge. At least the igniter section of the lighting circuit is mounted to the discharge lamp assembly, typically on the back of a reflector included in the discharge lamp assembly, for joint movement therewith relative to the vehicle body during the aiming adjustment of the discharge lamp assembly.

Abstract: An aimable vehicular headlamp system has a discharge lamp assembly mounted within a lamp housing via aiming screws. The discharge lamp assembly comprises a paraboloidal reflector, a discharge lamp bulb, and a bulb carrier subassembly electrically coupled to the discharge lamp bulb and mechanically supporting the same in position with respect to the reflector. Also included is a lighting circuit assembly comprising a ballast section for providing a high alternating voltage, and an igniter section electrically connected between the ballast section and the bulb carrier subassembly of the discharge lamp assembly for causing the lamp bulb to glow by an electric discharge. At leeast the igniter section of the lighting circuit is mounted to the lamp housing, with the igniter section electrically connected to the bulb carrier subassembly via flexible conductors of minimal lengths thoroughly disposed within the lamp housing.

Abstract: A motor vehicle headlamp with a discharge lamp as its light source in which electromagnetic noise produced by the discharge lamp or by the glow switch starter and which leaks out of the headlamp is eliminated. A lighting circuit unit is provided which includes a casing on the inner surface of which an electrically conductive layer is formed for shielding electromagnetic noise, and a lighting circuit for the discharge bulb accommodated in the casing and coupled to the rear end portion of a lamp body. In another embodiment, the rear end portion of a lamp body, on the inner surface of which an electrically conductive grounding layer is formed, is formed into a noise shielding chamber closed with a partition board capable of blocking electromagnetic noise, and a lighting circuit for the discharge bulb is accommodated in the noise shielding chamber.

Abstract: A vehicle headlamp having a projector-type light source assembly capable of emitting a highly coherent light beam. In order to make the headlamp appear larger than the light source assembly, a lamp housing is provided which is much larger in size than the light source assembly mounted therein, with the consequent provision of an annular space around the light source assembly within the lamp housing. Disposed in this annular space is an outline expander plate of transparent material having a multiplicity of minute cavities of cone shape formed in its rear face. The outline expander plate transmits by internal total reflection the light incident edgewise thereon. While so traveling through the outline expander plate, the light is reflected by the surfaces of the conical cavities generally in the forward direction of the headlamp, thereby making the complete surface area of the headlamp appear glowing.

Abstract: Herein disclosed is an automotive headlamp assembly of a so-called ventilation type. The assembly comprises a body structure having an open chamber formed therein, a lens attached to the body structure to cover the open chamber thereby to form in the body structure an enclosed chamber, an electric bulb arranged in the enclosed chamber, and first and second pipe members each having on end projected into the enclosed chamber and the other end exposed to the atmosphere. The other end of the second pipe member is so constructed and arranged that when a certain air flow passes through the other end, a negative pressure is produced around the same.

Abstract: A lamp socket assembly for an automotive headlamp, wherein a mount is formed at the back of the headlamp reflector. A socket fixture is screwed to the reflector at a rear surface of the lamp. The mount has a plurality of partial circumferential depressions. The socket fixture has corresponding cuts about its central hole. However, the cuts extend over only a portion of the depressions. A lamp has an integral socket with a focal point plate having a plurality of radially extending tongues. The tongues can be inserted through the cuts into the depressions and be engaged therein. In a dual lamp unit, one of the depressions of the mount for the auxiliary lamp can have a protrusion not present in the main lamp. The tongues for the main and auxiliary lamp sockets differ so that the main lamp socket cannot be engaged with the mount for the auxiliary lamp.

Abstract: A lamp assembly for an automobile comprises a tilting member such as a lamp unit or reflector adapted to be moved by optical axis adjusting rods threadedly engaged with self-locking nuts relative to a support member such as a lamp unit casing or the like fixed to a vehicle body or the like so as to adjust an optical axis of the lamp unit or reflector. According to the invention, each self-locking nut is formed with two engaging grooves extending in directions perpendicular to each optical axis adjusting rod. One of the grooves has two opposite surfaces formed with round extensions extending toward each other. The other groove has a bottom having a convex along its generatrix.