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An optical assembly, especially for an automobile vehicle, is fixed and pivoted on a support by a screw threaded in the support and carrying a ball at its free end. The ball engages in a socket mounted in a housing fixed to the optical assembly. According to the invention, the socket is moulded from

An optical assembly, especially for an automobile vehicle, is fixed and pivoted on a support by a screw threaded in the support and carrying a ball at its free end. The ball engages in a socket mounted in a housing fixed to the optical assembly. According to the invention, the socket is moulded from plastics material and comprises two parts connected by a live hinge disposed substantially in line with the center of the concave seating. After assembly the socket is fitted into a sleeve in the housing, which prevents opening of the hinge.

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In a headlamp assembly for an automotive vehicle having a control screw held by a fixed support, said control screw having a connecting ball, a unit for fixing and pivoting said head lamp assembly to said control screw comprising: a socket moulded from plastics material and having a concave seat ada

In a headlamp assembly for an automotive vehicle having a control screw held by a fixed support, said control screw having a connecting ball, a unit for fixing and pivoting said head lamp assembly to said control screw comprising: a socket moulded from plastics material and having a concave seat adapted to receive said ball of said screw, said socket comprising a first part having a plurality of arms, each said arm having a concave internal shape, said arms extending substantially in the direction of and around the longitudinal axis of said socket, and each said arm separated from an adjacent said arm by a slot in said first part of said socket extending substantially in the direction of said longitudinal axis, and a second part, said first and said second parts connected by a live hinge, said arms of said first part pivotable about said live hinge, and said second part having a substantially cylindrical formation connected to said second part of said socket; wherein said head lamp assembly includes a housing and said substantially cylindrical formation is adapted to fit into said housing to connect said socket to said head lamp assembly.