Abstract: A high illumination level lighting system. The system comprises a light source module and a lighthead. The light source module is remote from the lighthead. An elongated light piping member has a first end in said light source module and a second end adjacent said light head. Light energy from the light source module is transported by the light piping member to the lighthead which collects the light energy from the second end of the light piping member, controls it and directs it in a desired pattern onto a site to be illuminated. A support assembly is provided for the light head. The support assembly may hold the light head in fixed position, or it may be adjustable so as to hold the light head in adjusted positions. The light source module may be provided with filter elements to eliminate unwanted wave lengths, heat, and to provide color temperature control.

Abstract: An apparatus is provided for a lighthead which allows the lamp to be serviced without removing any components of the lighthead. The invention includes a lamp socket connected to the handle of the lighthead. The handle can be displaced from an operative position to expose the lamp for maintenance while remaining attached to the lighthead to prevent damage or loss of the components.

Abstract: A pattern change mechanism is provided for use with a lighting fixture. The mechanism includes a plurality of blocking members for blocking light directed by the reflector of the lighting fixture toward a target surface, means for moving the blocking members to achieve small, medium and large patterns of light on the target surface. The moving means includes a rotation member, drive means, actuator means linked to the blocking members and a handle for rotating the rotation member to thereby effect movement of the blocking members through the drive means and actuator means.

Abstract: A lighting fixture to illuminate a target surface, particulary a surgical site, is provided which includes a light source, a reflector superposing and partially circumscribing the light source, a cylindrical filter surrounding the light source coaxial to the axis of symmetry of the lighting fixture and a refractor positioned beneath the reflector through which the light reflected from the reflector must pass to reach the target surface. The refractor is divided into a plurality of portions which radiate outwardly from the axis of symmetry. Each portion includes first, second and third prism means having individual prism members of varying configuration for focusing the light to first, second and third areas, respectively, within a cylinder of light defined by the light passing through the refractor, to provide small, medium and large patterns respectively, of the cylinder of light when it impinges upon the target surface.

Abstract: A lighting fixture having a plurality of light source means arranged circumferentially around the axis of symmetry of the lighting fixture and a reflector system for folding and mixing the light emitted from the light source means to provide a single beam to simulate the light emitted from a single light source means. The light rays converge at an acute angle relative to the axis of symmetry to provide the single beam. The reflector system includes a plurality of source reflectors, each being operatively associated with one light source means, a second reflector positioned beneath the plurality of source reflectors to receive light therefrom in an overlapping fashion, and a third reflector radially spaced and partially circumscribing the source reflectors and the second reflector to receive light from the second reflector and to project that light to form the single beam.

Abstract: An improvement suitable for incorporation into a lighting fixture having a plurality of light source means for emitting light rays and at least one reflector wherein the one reflector superposes the light source means in a partially circumscribing, radially spaced relationship about the axis of symmetry of the lighting fixture to receive light rays and to project them onto a work surface. The improvement is a second reflector in axial alignment with, and rotatably mounted about, the axis of symmetry. The second reflector is positioned beneath the light source means and has a plurality of distinct surface sections, each of the surface sections being associated with one of the light source means for receiving the light rays emitted therefrom and projecting the light rays onto the one reflector. Each surface section has two radially adjacent portions. One portion has a textured finish for diffusing the light rays and the other portion has a specular finish for intensifying the light rays.

Abstract: A lampholder for insertion into and removal from an electrically powered lighting unit which includes a socket for receiving the lamp, means for communicating electrical power from the unit to the lamp, means for releasably engaging the unit, and a cap structured to prevent cracking superposing the socket and having an upper surface and a lower surface proximate the socket. A plurality of windows through the cap of a sufficient size to vent heat emitted from the lamp, together with the heat resistant material from which the cap is formed, prevent the upper surface from exceeding a predetermined temperature. An insulation layer is preferably disposed between the lower surface and the socket.